Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Description :
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Screw vs cement retained implant prosthesisApurva Thampi
This is a journal club presentation featuring a recent article regarding a screw and cement retained implant prosthesis.
the presentation and all its related material is available on request. Mail me at apurvathampi@gmail.com
Implant supported maxillofacial prosthesis./ lingual orthodontics coursesIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
The Controlled Assisted Ridge Expansion Technique for Implant placement in An...Indian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
the dental implant design from the point of view of dental biomaterials and the effect of force factors on choice of implant design in correlation with bone defects and anatomical anomalies
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Stability /certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Screw vs cement retained implant prosthesisApurva Thampi
This is a journal club presentation featuring a recent article regarding a screw and cement retained implant prosthesis.
the presentation and all its related material is available on request. Mail me at apurvathampi@gmail.com
Implant supported maxillofacial prosthesis./ lingual orthodontics coursesIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
The Controlled Assisted Ridge Expansion Technique for Implant placement in An...Indian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
the dental implant design from the point of view of dental biomaterials and the effect of force factors on choice of implant design in correlation with bone defects and anatomical anomalies
Indian Dental Academy: will be one of the most relevant and exciting
training center with best faculty and flexible training programs
for dental professionals who wish to advance in their dental
practice,Offers certified courses in Dental
implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic
Dentistry, Periodontics and General Dentistry.
Stability /certified fixed orthodontic courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Retention of maxillofacial prosthesis./cosmetic dentistry courseIndian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Magnetism. Introduction to Magnetism.
IGCSE comittee slide. I obtained this from Physics IGCSE comittee. Thank you for sharing. If the owner find this, kindly email me at fadhilahalias@gmail.com for aknowledgement.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training
center with best faculty and flexible training programs for dental
professionals who wish to advance in their dental practice,Offers certified
courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry,
Prosthetic Dentistry, Periodontics and General Dentistry.
Magnetic retention in maxillo facial prostheses/cosmetic dentistry coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Implants in orthodontics /certified fixed orthodontic courses by Indian dent...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Magnets in orthodontics /certified fixed orthodontic courses by Indian dent...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Magnets in orthodontics. /certified fixed orthodontic courses by Indian den...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
00919248678078
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Tech. for immediate core build up in endo treated teeth/ dental implant coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.
A magnet (from Greek μαγνήτης λίθος, "Magnesian stone") is a material or object that produces a magnetic field .This magnetic field is invisible and causes the most notable property of a magnet a force that pulls on nearby magnetic materials, or attracts or repels other magnets.
Magnets attract specific metals, and they have north and south poles. Opposite poles attract each other while like poles repel.
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
Space gaining in fixed orthodontics /certified fixed orthodontic courses by I...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Reisn bonded prosthesis / dental implant courses by Indian dental academy Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Micro implant anchorage in orthodontics /certified fixed orthodontic courses ...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.
Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078
Similar to Magnetic retention in maxillo facial prostheses/ General orthodontics (20)
Opportunity for Dentists (BDS/MDS )to relocate to United kingdom -Register as a DENTAL HYGIENIST/ DENTAL THERAPIST without Board exams and after approval you can register in GDC as a DH/DT and start working as a DH/DT Immediately and get paid.
You can complete the whole process in 3-4 months.Salary range for DH/DT is around 2500-3500 Pounds per month.
Eligibility / requirements-
1. An International English Language Testing System (IELTS) certificate
at the appropriate level.(Within 2 yrs of application date )
2: A recent primary dental qualification that has been taught and examined in English..(Within 2 yrs of application date )
3: A recent pass in a language test for registration with a regulatory authority in a country where the first language is English.
If you are interested Please contact us for more details.
1ST, 2ND AND 3RD ORDER BENDS IN STANDARD EDGEWISE APPLIANCE SYSTEM /Fixed ort...Indian dental academy
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals
who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry,
Periodontics and General Dentistry.
Indian Dental Academy: will be one of the most relevant and exciting training center with best faculty and flexible training programs for dental professionals who wish to advance in their dental practice,Offers certified courses in Dental implants,Orthodontics,Endodontics,Cosmetic Dentistry, Prosthetic Dentistry, Periodontics and General Dentistry.
I –Aligners are made with FDA approved transparent thermoplastic materials using 3D scanning, 3D Printing and finally Trays with Pressure vacuum formers.
Dear Doctor,
Indian Dental Academy Now offers comprehensive online Orthodontics course.
Course includes:
1.whiteboard lecture presentations
2.Case Discussions
3.with hundreds of pictures.
4.Demo on Models
5.Demo on Patients
6. subtitles in your own language
12 months unlimited access and support @350 USD only.
For Demo please visit :www.idalectures.com/preview/
For more details visit: www.idalectures.com
Please contact us for any clarifications:
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indiandentalacademy@gmail.com
Thanks & Regards
Indian Dental Academy
--
Indian Dental Academy
Leader in continuing dental education
www.indiandentalacademy.com
skype:indiandentalacademy
+919248678078
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Cytotoxicity of silicone materials used in maxillofacial prosthesis / dental ...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Diagnosis and treatment planning in completely endntulous arches/dental coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
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Properties of Denture base materials /rotary endodontic coursesIndian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
Use of modified tooth forms in complete denture occlusion / dental implant...Indian dental academy
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and
offering a wide range of dental certified courses in different formats.for more details please visit
www.indiandentalacademy.com
How to Make a Field invisible in Odoo 17Celine George
It is possible to hide or invisible some fields in odoo. Commonly using “invisible” attribute in the field definition to invisible the fields. This slide will show how to make a field invisible in odoo 17.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
Ethnobotany and Ethnopharmacology:
Ethnobotany in herbal drug evaluation,
Impact of Ethnobotany in traditional medicine,
New development in herbals,
Bio-prospecting tools for drug discovery,
Role of Ethnopharmacology in drug evaluation,
Reverse Pharmacology.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
4. The success of most extra oral prosthesesThe success of most extra oral prostheses
depends on retention.depends on retention.
The problem of retention in maxillofacialThe problem of retention in maxillofacial
prosthesis is a great challenge posed to theprosthesis is a great challenge posed to the
prosthodontists.prosthodontists.
When the prosthesis is designed, fullWhen the prosthesis is designed, full
consideration must be given to the retention ofconsideration must be given to the retention of
the prosthesis.the prosthesis.
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5. A number of methods of retention are available.A number of methods of retention are available.
These include :-These include :-
Mechanical devicesMechanical devices
Anatomic methods andAnatomic methods and
Adhesives with or without the use of the otherAdhesives with or without the use of the other
methods.methods.
The mechanical retention methods includes theThe mechanical retention methods includes the
use of magnets amongst many other methods.use of magnets amongst many other methods.
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6. The use of magnets has been popular inThe use of magnets has been popular in
dentistry.dentistry.
The reason of popularity is related to theirThe reason of popularity is related to their
small size and strong attractive forces.small size and strong attractive forces.
Magnets have generated great interest inMagnets have generated great interest in
dentistry, and their application are numerous.dentistry, and their application are numerous.
They are being used as retentive aids for overThey are being used as retentive aids for over
dentures, removable partial dentures anddentures, removable partial dentures and
implants.implants.
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7. Javid, in 1971 constructed an extensiveJavid, in 1971 constructed an extensive
prostheses for both extra-oral and intra-oralprostheses for both extra-oral and intra-oral
aspects connected with magnets.aspects connected with magnets.
Federick, in 1976, rehabilitated a patientFederick, in 1976, rehabilitated a patient
with a large orofacial defect using a 2-with a large orofacial defect using a 2-
component obturator that was locked tocomponent obturator that was locked to
In maxillofacial prosthodontics theyIn maxillofacial prosthodontics they
have been used for decades tohave been used for decades to
reconstruct large defects with the helpreconstruct large defects with the help
of multiple component prostheses.of multiple component prostheses.
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9. Magnets were first introduced for applications inMagnets were first introduced for applications in
dentistry in 1953 in the field of orthodontics.dentistry in 1953 in the field of orthodontics.
Conventional magnets were applied inConventional magnets were applied in
prosthodontics in the year 1960 as retentiveprosthodontics in the year 1960 as retentive
devices for over dentures, removable partialdevices for over dentures, removable partial
dentures and maxillo- facial prostheses.dentures and maxillo- facial prostheses.
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10. One of the earliest magnets was pairedOne of the earliest magnets was paired
AlnicoAlnico which is a permanent magnet alloy ofwhich is a permanent magnet alloy of
iron, cobalt ,nickel and aluminum. But theiron, cobalt ,nickel and aluminum. But the
main disadvantage of this system was themain disadvantage of this system was the
large size.large size.
Coated and uncoated cobalt-platinum barCoated and uncoated cobalt-platinum bar
magnets(co-pt) were implanted in themagnets(co-pt) were implanted in the
mandible by Behr man and Toto to retain amandible by Behr man and Toto to retain a
denture.denture.
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11. In late 1960s another permanent magnet inIn late 1960s another permanent magnet in
which cobalt was alloyed with Samariumwhich cobalt was alloyed with Samarium
(Co(Co55sm) was introduced, it has twice thesm) was introduced, it has twice the
magnetic field strength of co-pt and themagnetic field strength of co-pt and the
strongest of Alnico alloys.strongest of Alnico alloys.
These magnets could be produced in veryThese magnets could be produced in very
small dimensions and approximately one fifthsmall dimensions and approximately one fifth
of Co-pt magnets and still could provide sameof Co-pt magnets and still could provide same
force.force.
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12. Another alloy based on neodymium – iron –Another alloy based on neodymium – iron –
boron became available in 1980s for dentalboron became available in 1980s for dental
applications. Both Coapplications. Both Co55Sm and Nd-Fe-B areSm and Nd-Fe-B are
termed as rare earth magnets because they aretermed as rare earth magnets because they are
rare from the standpoint of extraction.rare from the standpoint of extraction.
Another material Samarium iron nitride is beingAnother material Samarium iron nitride is being
developed for medical and dental appliances. Itdeveloped for medical and dental appliances. It
is highly resistant to demagnetization and hasis highly resistant to demagnetization and has
better resistance to temperature and corrosionbetter resistance to temperature and corrosion
than Nd-Fe-B. It is still under development.than Nd-Fe-B. It is still under development.
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14. Based on alloys usedBased on alloys used
• Those containing cobalt.Those containing cobalt.
E.g. Alnico, Alnico V, Co-Pt.E.g. Alnico, Alnico V, Co-Pt.
• Those not containing cobalt.Those not containing cobalt.
E.g. Nd-Fe-B, Samarium iron nitride.E.g. Nd-Fe-B, Samarium iron nitride.
Based on ability to retain magnetic propertiesBased on ability to retain magnetic properties
• Soft (Easy to magnetize or demagnetize – less permanent).Soft (Easy to magnetize or demagnetize – less permanent).
E.g. Pd-Co-Ni alloy, Pd-Co alloyE.g. Pd-Co-Ni alloy, Pd-Co alloy
• Hard (Retain magnetism permanently).Hard (Retain magnetism permanently).
E.g. Alnico alloy, Co-Pt.E.g. Alnico alloy, Co-Pt.
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15. Based on surface coatingBased on surface coating
• CoatedCoated
• UncoatedUncoated
Based on the type of magnetismBased on the type of magnetism
• RepulsionRepulsion
• AttractionAttraction
Based on the type of magnetic fieldBased on the type of magnetic field
• Open fieldOpen field
• Closed fieldClosed field
Rectangular closed – field sandwich designRectangular closed – field sandwich design
Circular closed – field sandwich designCircular closed – field sandwich design
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16. Based on number of magnets in theBased on number of magnets in the
systemsystem
SingleSingle
PairedPaired
Based on the arrangement of polesBased on the arrangement of poles
Reversed polesReversed poles
Non-reversed polesNon-reversed poles
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17. MECHANISM OF MAGNETISMMECHANISM OF MAGNETISM
Every atom in a material is a magnet becauseEvery atom in a material is a magnet because
electrons orbit it’s nucleus. While theseelectrons orbit it’s nucleus. While these
electrons move they produce a magnetic fieldelectrons move they produce a magnetic field
around the atom.around the atom.
In some atoms such as Fe, Ni, and Co, thereIn some atoms such as Fe, Ni, and Co, there
are unpaired electrons that create a tinyare unpaired electrons that create a tiny
magnetic field.magnetic field.
In a magnetic material, a large portion of theseIn a magnetic material, a large portion of these
atoms align in small regions called “domains”.atoms align in small regions called “domains”.
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18. On application of a magnetic field, these domainsOn application of a magnetic field, these domains
align to reach a saturation point, at this point thealign to reach a saturation point, at this point the
material is magnetized.material is magnetized.
Some materials require small magnetic field to reachSome materials require small magnetic field to reach
the saturation point called “the saturation point called “softsoft” magnet, some” magnet, some
require larger magnetic field to be magnetized, suchrequire larger magnetic field to be magnetized, such
material becomes a “material becomes a “hardhard”” magnet.magnet.
When the external magnetic field is removed, if theWhen the external magnetic field is removed, if the
material retains its magnetization then it is called amaterial retains its magnetization then it is called a
permanent magnetpermanent magnet..
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19. MAGNETIC MATERIALSMAGNETIC MATERIALS
Over the last century, significant advances have madeOver the last century, significant advances have made
in the development of magnetic materials. Thesein the development of magnetic materials. These
advances have been quickly transferred into dentaladvances have been quickly transferred into dental
applications.applications.
NeodymiumNeodymium –– iron boroniron boron––(Nd-Fe-B)(Nd-Fe-B)
RE-alloy samarium cobalt.RE-alloy samarium cobalt.
Alnico-alloysAlnico-alloys
Samarium iron nitrideSamarium iron nitride
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20. The main magnetic material used isThe main magnetic material used is
the rare earth materialthe rare earth material NeodymiumNeodymium
– iron boron–(Nd-Fe-B)– iron boron–(Nd-Fe-B)
It is the most powerful commerciallyIt is the most powerful commercially
available magnetic material.available magnetic material.
This group of magnetic materialsThis group of magnetic materials
provides the highest availableprovides the highest available
magnetic energies of any material.magnetic energies of any material.
NdFeB magnets allow small shapesNdFeB magnets allow small shapes
and sizes with high magnetic fields.and sizes with high magnetic fields.
Coating is needed for NdFeBCoating is needed for NdFeB
Neodymium – iron boron
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21. Samarium Cobalt (SmCo) magnets: ofSamarium Cobalt (SmCo) magnets: of
the Rare Earth class, have been availablethe Rare Earth class, have been available
since the early 1970's.since the early 1970's.
These magnets possess very highThese magnets possess very high
magnetic properties, excellent thermalmagnetic properties, excellent thermal
stability, and remarkable resistancestability, and remarkable resistance
against corrosion and oxidation.against corrosion and oxidation.
These characteristics make SmCoThese characteristics make SmCo
magnets ideal for applications requiring amagnets ideal for applications requiring a
resistance to wide-ranging temperaturesresistance to wide-ranging temperatures
and environments.and environments.
Samarium cobalt
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22. Alnico-alloysAlnico-alloys
The Aluminum/Nickel/CobaltThe Aluminum/Nickel/Cobalt
combination is excellent for highcombination is excellent for high
temperature use, and is readilytemperature use, and is readily
available in rods or bars.available in rods or bars.
The direction of magnetizationThe direction of magnetization
for Alnico is usually much longerfor Alnico is usually much longer
than the other dimensionsthan the other dimensions
(parallel to the length) for best(parallel to the length) for best
results.results.
As cast material, it is gray toAs cast material, it is gray to
dark brown in color, but looksdark brown in color, but looks
metallic when ground.metallic when ground.
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23. Samarium iron nitride is a promising newSamarium iron nitride is a promising new
material for permanent magnet applicationsmaterial for permanent magnet applications
because of its high resistance tobecause of its high resistance to
demagnetization, high magnetization and betterdemagnetization, high magnetization and better
resistance than Nd-Fe-B to temperature andresistance than Nd-Fe-B to temperature and
corrosion.corrosion.
Samarium iron nitride
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24. Design of Magnetic Attachments.Design of Magnetic Attachments.
Magnet systems may be either anMagnet systems may be either an
Open fieldOpen field
Closed field designsClosed field designs
A cup typeA cup type
A sandwich typeA sandwich type
A modified split-pole typeA modified split-pole type
A split pole with slant magnetizationA split pole with slant magnetization
A cylinder typeA cylinder type
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25. An open field system consistsAn open field system consists
of a cylindrical magnet withof a cylindrical magnet with
open ends, it can be single oropen ends, it can be single or
paired.paired.
For simple, cylindrical, openFor simple, cylindrical, open
field magnet encased in nonfield magnet encased in non
magnetic housing, magneticmagnetic housing, magnetic
field is experienced outside thefield is experienced outside the
magnetic specimen.magnetic specimen.
Only one pole is used forOnly one pole is used for
attachment to the keeper.attachment to the keeper.
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26. In closed field system Consists ofIn closed field system Consists of
paired magnets and an attachable andpaired magnets and an attachable and
detachable keepers.detachable keepers.
The magnet pairs are arranged withThe magnet pairs are arranged with
opposite poles adjacent and magnetopposite poles adjacent and magnet
faces abut magnetizable alloy keepers.faces abut magnetizable alloy keepers.
In general, closed field magnets haveIn general, closed field magnets have
higher contact forces than open fieldhigher contact forces than open field
devices of an equivalent size.devices of an equivalent size.
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27. Attachment of closed-field magnets is moreAttachment of closed-field magnets is more
efficient because both the north and south polesefficient because both the north and south poles
can be used for attachment to the keeper andcan be used for attachment to the keeper and
the keepers can contain the magnetic flux.the keepers can contain the magnetic flux.
The first closed field design was the split poleThe first closed field design was the split pole
design, which consisted of 2 magnets arrangeddesign, which consisted of 2 magnets arranged
with opposite poles adjacent to each other.with opposite poles adjacent to each other.
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28. A small magnetic field is attached to the top ofA small magnetic field is attached to the top of
the magnets.the magnets.
Comparisons of the forces provided by pairedComparisons of the forces provided by paired
magnets, single magnets and soft magneticmagnets, single magnets and soft magnetic
material, and reversed and non-reversed polesmaterial, and reversed and non-reversed poles
have been performed.have been performed.
Paired magnets provided a greater breakawayPaired magnets provided a greater breakaway
force than a single magnet with a soft magneticforce than a single magnet with a soft magnetic
keeper.keeper.
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29. A reversed split pole system was designed byA reversed split pole system was designed by
Gillings, provided a greater force than a nonGillings, provided a greater force than a non
reversed split pole design.reversed split pole design.
Various designs exist that are based on circularVarious designs exist that are based on circular
and rectangular assemblies.and rectangular assemblies.
A magnet sandwich design, has been shown toA magnet sandwich design, has been shown to
work well, the amount of retention depends onwork well, the amount of retention depends on
the thickness of the side plates and base.the thickness of the side plates and base.
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30. Finite element analysis has been used to the design ofFinite element analysis has been used to the design of
attachments to maximize that they provide.attachments to maximize that they provide.
A closed –field design consisting of a magnet in a cupA closed –field design consisting of a magnet in a cup
which in turn is placed in an outer cup provides a higherwhich in turn is placed in an outer cup provides a higher
retention force than a simple open field system.retention force than a simple open field system.
A circular closed field sandwich-type design provides aA circular closed field sandwich-type design provides a
greater amount of retention, if keeper materials aregreater amount of retention, if keeper materials are
made ellipsoidal, then retention will increase further.made ellipsoidal, then retention will increase further.
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33. ADVANTAGESADVANTAGES
Ease of placementEase of placement
Automatic reseatingAutomatic reseating
Constant retention with many cyclesConstant retention with many cycles
Easy replacement if neededEasy replacement if needed
Small size with strong attractive forces.Small size with strong attractive forces.
Can be placed within the prosthesisCan be placed within the prosthesis
Dissipate lateral functional forcesDissipate lateral functional forces
Less need for parallel abutmentsLess need for parallel abutments
Can be used for implant – supported prosthesis.Can be used for implant – supported prosthesis.
Ease of cleaningEase of cleaning
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35. MAGNETIC RETENTIONMAGNETIC RETENTION
Application of magnetic force in retention ofApplication of magnetic force in retention of
prostheses has been tried more than halfprostheses has been tried more than half
century.century.
With the development of magnetic materialsWith the development of magnetic materials
and manufacturing technique, it has become aand manufacturing technique, it has become a
realization to use magnetic force to retain oralrealization to use magnetic force to retain oral
and maxillofacial prostheses in recent 20 years.and maxillofacial prostheses in recent 20 years.
As a mature retentive technique, magneticAs a mature retentive technique, magnetic
attachment has been applied in variousattachment has been applied in various
prostheses more and more popularly now.prostheses more and more popularly now.
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36. MAGNETIC RETENTION IN DIFFERENTMAGNETIC RETENTION IN DIFFERENT
MAXILLO FACIAL PROSTHESESMAXILLO FACIAL PROSTHESES
EXTRA ORAL PROSTHESES-EXTRA ORAL PROSTHESES-
Free standing magnetic retention for prosthesis withFree standing magnetic retention for prosthesis with
osseointegraded implants.osseointegraded implants.
Magnetic retention in endosteal implants used forMagnetic retention in endosteal implants used for
facial prostheses.facial prostheses.
Magnetic retention in midfacial prostheses withoutMagnetic retention in midfacial prostheses without
implants.implants.
Magnetic retention in combined prostheses.Magnetic retention in combined prostheses.
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37. Intra oral prostheses-Intra oral prostheses-
ObturatorsObturators
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38. FREESTANDING MAGNETIC RETENTION FORFREESTANDING MAGNETIC RETENTION FOR
EXTRAORAL PROSTHESES WITHEXTRAORAL PROSTHESES WITH
OSSEOINTEGRATED IMPLANTSOSSEOINTEGRATED IMPLANTS
The use of extra oral Osseo integrated implantsThe use of extra oral Osseo integrated implants
for prosthetic rehabilitation of facial defects isfor prosthetic rehabilitation of facial defects is
now widely accepted and practiced throughoutnow widely accepted and practiced throughout
world.world.
Extra oral Osseo integrated implants are notExtra oral Osseo integrated implants are not
without problems, most common is hygiene ofwithout problems, most common is hygiene of
the implant abutment.the implant abutment.
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39. The most common method of retentionThe most common method of retention
used in conjunction with implants is theused in conjunction with implants is the
bar splint and clip assembly, itbar splint and clip assembly, it
provides good retention but theprovides good retention but the
presence of the bar may inhibitpresence of the bar may inhibit
abutment hygiene by preventingabutment hygiene by preventing
sufficient patient access to the area.sufficient patient access to the area.
Other complication include the initialOther complication include the initial
difficulty in placing the prosthesis anddifficulty in placing the prosthesis and
fracture of the base if the clips are setfracture of the base if the clips are set
too tightly.too tightly.
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40. The use of magnets inThe use of magnets in
conjunction with a bar splint orconjunction with a bar splint or
as a complete magneticas a complete magnetic
superstructure have been wellsuperstructure have been well
documented, however thedocumented, however the
problem of abutment hygieneproblem of abutment hygiene
may still be compromised bymay still be compromised by
presence of superstructure orpresence of superstructure or
bar.bar.
Newer generation magnets andNewer generation magnets and
associated abutment magna-cupassociated abutment magna-cup
components have beencomponents have been
successfully used is a variety ofsuccessfully used is a variety of
patients over the past 5 years.patients over the past 5 years.
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41. It is important to be selective in the use of freestandingIt is important to be selective in the use of freestanding
magnetic retention.magnetic retention.
A common use of freestanding magnets has been in smallA common use of freestanding magnets has been in small
orbital defects that are subject to minimal soft tissueorbital defects that are subject to minimal soft tissue
movement.movement.
The original Neo-mini magnet has a pull force ofThe original Neo-mini magnet has a pull force of
approximately 500 gm and when used for orbitalapproximately 500 gm and when used for orbital
prostheses, where there is no fear of lateral displacement,prostheses, where there is no fear of lateral displacement,
complete security of retention is assured.complete security of retention is assured.
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43. RETENTION OF MAGNETS IN ENDOSTEALRETENTION OF MAGNETS IN ENDOSTEAL
IMPLANTS USED FOR FACIAL PROSTHESESIMPLANTS USED FOR FACIAL PROSTHESES
Facial defects, whether the result of trauma orFacial defects, whether the result of trauma or
ablative surgery, are usually surgically treatedablative surgery, are usually surgically treated
whereby lost parts are replaced by soft tissue orwhereby lost parts are replaced by soft tissue or
bone grafts or both.bone grafts or both.
Some cases where reconstruction is notSome cases where reconstruction is not
possible or contraindicated, the treatment ofpossible or contraindicated, the treatment of
choice is facial prostheses to restore lostchoice is facial prostheses to restore lost
structures.structures.
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44. At present, endosteal implants andAt present, endosteal implants and
implant-supported epitheses are the stateimplant-supported epitheses are the state
of art. Anchoring components may exist ofof art. Anchoring components may exist of
bar constructions or magnets.bar constructions or magnets.
Magnets are often used as abutments forMagnets are often used as abutments for
nasal, auricular and orbital epitheses.nasal, auricular and orbital epitheses.
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46.
End osseous Fixtures in the Calotte used for retaining
Wigs With magnetic attachments
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47. Magnetic retention in midfacialMagnetic retention in midfacial
prostheses without implants.prostheses without implants.
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52. Intra-oral magnetic retentionIntra-oral magnetic retention
The hollow facial epithese was made with medical silicone material
and two pairs of magnetic attachments were also applied to connect
the epithese and the obturator.
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53. CONCLUSIONCONCLUSION
Magnets have been effectively used for theMagnets have been effectively used for the
retention, maintenance and stabilization ofretention, maintenance and stabilization of
maxillo facial prosthesis and they are effectivemaxillo facial prosthesis and they are effective
for this purpose. Retention is like a castle heldfor this purpose. Retention is like a castle held
together by proper Support and Stability. If anytogether by proper Support and Stability. If any
one fails the whole castle comes crumblingone fails the whole castle comes crumbling
down….down….
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54. Thank you
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