The document discusses the principles involved in designing removable partial dentures (RPDs). It states that designing an RPD requires balancing mechanical and biological factors to provide optimal support, function, and esthetics. The "KISS principles" of safety and simplicity should be followed. Forces acting on the denture and the denture's response are reviewed. Design methods like stress distribution, clasp design and position, and splinting teeth can help limit harmful forces. The document provides details on various RPD design considerations and philosophies to control stresses on abutment teeth.
Principles of removable partial dentures / orthodontic seminarsIndian 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.
Design considerations for a distal extension rpd/prosthodontic 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
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.
The following presentation is a compilation of RPD designing data from Mccraken and Stewart. it also includes data from evidence-based literature and recent practices
Principles of removable partial dentures / orthodontic seminarsIndian 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.
Design considerations for a distal extension rpd/prosthodontic 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
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.
The following presentation is a compilation of RPD designing data from Mccraken and Stewart. it also includes data from evidence-based literature and recent practices
Designing in removable partial dentures /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.
The biomechanics of stresses induced by removable partial dentureIndian 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
Designing in removable partial dentures /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.
The biomechanics of stresses induced by removable partial denture/ fixed orth...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.
a short presentation on the biomechanics in Removable Partial Denture.... a very important topic to be understood completely for easy designing of cast framework and also to know the problems in already treated conditions
Raju designing of class i and class ii/ dental crown & bridge 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
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
Stress breakers /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
5- Basic principles for designing the removable partial denture class i parti...Amal Kaddah
Content:
Basic principles for removable partial dentures’ designs
1.Objectives and functions of removable partial dentures.
2.Factors that affect removable partial dentures’ design.
a. Abutment condition
b. Ridge condition
c. Patients’ needs, Gender and advanced age
d. Forces acting on removable partial dentures.
3. Biomechanical principles of the distal extension partial denture design
4.Damaging effect of removable partial dentures.
5.Problems of support associated with free-end saddles removable partial dentures.
6.How to control these problems (solutions).
a. Reduction of the load.
b. Distribution of the load between abutment teeth and residual ridges.
c. Wide distribution of the load
d. Providing posterior abutment
7.Principles of Class I RPD design
8.Selecting components for designing free extension removable partial dentures
(Basic Principles of a Properly Designed Components)
a. Denture base and Artificial Teeth
b. Proximal plates
c. Rests
d. Direct retainers and Indirect Retainers
e. Major connector and Minor connectors
9.Conclusion
Minimizing and controlling strain on the residual ridge
Minimizing and controlling strain on the abutment teeth
10. Bibliographies
Design consideration in reducing stress in rpd/ oral surgery 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.for more details please visit
www.indiandentalacademy.com
Designing in removable partial dentures /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.
The biomechanics of stresses induced by removable partial dentureIndian 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
Designing in removable partial dentures /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.
The biomechanics of stresses induced by removable partial denture/ fixed orth...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.
a short presentation on the biomechanics in Removable Partial Denture.... a very important topic to be understood completely for easy designing of cast framework and also to know the problems in already treated conditions
Raju designing of class i and class ii/ dental crown & bridge 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
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
Stress breakers /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
5- Basic principles for designing the removable partial denture class i parti...Amal Kaddah
Content:
Basic principles for removable partial dentures’ designs
1.Objectives and functions of removable partial dentures.
2.Factors that affect removable partial dentures’ design.
a. Abutment condition
b. Ridge condition
c. Patients’ needs, Gender and advanced age
d. Forces acting on removable partial dentures.
3. Biomechanical principles of the distal extension partial denture design
4.Damaging effect of removable partial dentures.
5.Problems of support associated with free-end saddles removable partial dentures.
6.How to control these problems (solutions).
a. Reduction of the load.
b. Distribution of the load between abutment teeth and residual ridges.
c. Wide distribution of the load
d. Providing posterior abutment
7.Principles of Class I RPD design
8.Selecting components for designing free extension removable partial dentures
(Basic Principles of a Properly Designed Components)
a. Denture base and Artificial Teeth
b. Proximal plates
c. Rests
d. Direct retainers and Indirect Retainers
e. Major connector and Minor connectors
9.Conclusion
Minimizing and controlling strain on the residual ridge
Minimizing and controlling strain on the abutment teeth
10. Bibliographies
Design consideration in reducing stress in rpd/ oral surgery 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.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.
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.
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
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
3- Basic principles for designing the removable partial denture Amal Kaddah
Clinical course of Partial Denture
3- Basic principles for designing the removable partial denture
a- Problems and General Principles Applied for Kennedy Class I
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
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Prosthetic Dentistry, Periodontics and General Dentistry.
Biomechanics in fixed partial prosthodontics/ orthodontics trainingIndian 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 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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Precision attachments1 / dental implant courses by Indian dental academy Indian dental academy
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
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.
Anchorage in orthodontics 3 /certified fixed orthodontic courses by Indian de...Indian dental academy
Welcome to 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 has a unique training program & curriculum that provides students with exceptional clinical skills and enabling them to return to their office with high level confidence and start treating patients
State of the art comprehensive training-Faculty of world wide repute &Very affordable.
Anchorage 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.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
Similar to Principles of rpd final/endodontic courses (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-
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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,
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Course includes:
1.whiteboard lecture presentations
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4.Demo on Models
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Thanks & Regards
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--
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
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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
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Properties of Denture base materials /rotary endodontic coursesIndian dental academy
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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
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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
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Palestine last event orientationfvgnh .pptxRaedMohamed3
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Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
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The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
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Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
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Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
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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.
1. PRINCIPLES OFPRINCIPLES OF
REMOVABLE PARTIALREMOVABLE PARTIAL
DENTUREDENTURE
INDIAN DENTAL ACADEMY
Leader in continuing Dental Education
www.indiandentalacademy.comwww.indiandentalacademy.com
2. IntroductionIntroduction
Designing a removable partialDesigning a removable partial
prosthesis which optimally satisfies theprosthesis which optimally satisfies the
prosthodontic requirements of support,prosthodontic requirements of support,
function, and esthetics is a dauntingfunction, and esthetics is a daunting
challenge.challenge.
A denture should be designed to obtain aA denture should be designed to obtain a
balance between both the mechanical andbalance between both the mechanical and
biological factors.biological factors.
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3. Keeping the KISSKeeping the KISS PrinciplesPrinciples—“KISS” is—“KISS” is
an acronym meaning “Keep It Safe andan acronym meaning “Keep It Safe and
Simple”—in mind and utilizing theseSimple”—in mind and utilizing these
principlesprinciples as a handy reference tool willas a handy reference tool will
assist in meeting this challenge.assist in meeting this challenge.
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4. ““Safety”— those design elements whichSafety”— those design elements which
promote maximum support withinpromote maximum support within
physiologic limits, resistance to movement,physiologic limits, resistance to movement,
and resistance to degradation / wear of bothand resistance to degradation / wear of both
hard and soft tissues.hard and soft tissues.
““Simple”— those design elements whichSimple”— those design elements which
promote function, esthetics, comfort, easepromote function, esthetics, comfort, ease
of fabrication, and ease of maintenance,of fabrication, and ease of maintenance,
cleaning, and repair.cleaning, and repair.
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5. UNDERSTANDING THE PRINCIPLESUNDERSTANDING THE PRINCIPLES
INVOLVED IN DESIGNING AN R P DINVOLVED IN DESIGNING AN R P D
I.I. Different forces act on the dentureDifferent forces act on the denture
inside the oral cavityinside the oral cavity
II.II. The response of the denture to theThe response of the denture to the
forces acting on it.forces acting on it.
III.III. Design methods, which help to limit theDesign methods, which help to limit the
effects of these harmful forces.effects of these harmful forces.
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6. Different forces acting on theDifferent forces acting on the
denture inside the oral cavitydenture inside the oral cavity
Occlusal forces – in a tissue wardOcclusal forces – in a tissue ward
directiondirection
Forces from musculatureForces from musculature
Sticky foodSticky food
GravityGravity
Dead zone or zone of equilibriumDead zone or zone of equilibrium
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7. Biomechanical considerationBiomechanical consideration
Maxfield stated that common observationMaxfield stated that common observation
clearly indicates that the ability of the livingclearly indicates that the ability of the living
things to tolerate force is largelythings to tolerate force is largely
dependent upon the magnitude anddependent upon the magnitude and
intensity of the force.intensity of the force.
dentist should consider thedentist should consider the
direction, duration, frequency anddirection, duration, frequency and
magnitude of the force.magnitude of the force.
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8. SIMPLE MACHINESSIMPLE MACHINES
InIn physicsphysics, a simple machine is any, a simple machine is any
device that only requires thedevice that only requires the
application of a single force to work. Itapplication of a single force to work. It
is a tool used to make work easier.is a tool used to make work easier.
Machines use aMachines use a forceforce (push or pull) to(push or pull) to
move amove a loadload..
An understanding of simple machinesAn understanding of simple machines
will enhance our rationalization of thewill enhance our rationalization of the
design of RPD.design of RPD.
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9. Machines may be classified intoMachines may be classified into
SimpleSimple
compoundcompound
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10. Lever is a rigid object that is used with anLever is a rigid object that is used with an
appropriateappropriate fulcrumfulcrum or pivot point to multiplyor pivot point to multiply
the mechanical force that can be applied tothe mechanical force that can be applied to
another objectanother object..
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11. Whenever effort arm is longer than resistance arm,
mechanical advantage is in favor of effort arm,
proportional to difference in length of the two arms.
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12. Types of leverTypes of lever
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13. Forces acting on partial dentureForces acting on partial denture
Distal extension partial denture willDistal extension partial denture will
rotate in relation to 3 cranial planesrotate in relation to 3 cranial planes
HorizontalHorizontal
SagittalSagittal
VerticalVertical
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14. Horizontal fulcrumHorizontal fulcrum
Passes thro’ terminal abutments.Passes thro’ terminal abutments.
Controls rotational movements in the sagittalControls rotational movements in the sagittal
plane.plane.
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15. Sagittal fulcrumSagittal fulcrum
Extends thro’ the occlusal rest on the terminalExtends thro’ the occlusal rest on the terminal
abutment and along the crest of residual ridgeabutment and along the crest of residual ridge
on the same side.on the same side.
It controls rotational movement in vertical plane.It controls rotational movement in vertical plane.
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16. Vertical fulcrumVertical fulcrum
Located in the vicinity of the midline justLocated in the vicinity of the midline just
lingual to the anterior teeth.lingual to the anterior teeth.
It controls rotational movements in horizontalIt controls rotational movements in horizontal
plane.plane.
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17. Inclined planeInclined plane
Two inclined surfaces in close alignment toTwo inclined surfaces in close alignment to
one another.one another.
The action of inclined planes when force isThe action of inclined planes when force is
applied may beapplied may be
1.1. Deflection of object itself (denture)Deflection of object itself (denture)
2.2. Movement of inclined plane itself ( tooth)Movement of inclined plane itself ( tooth)
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18. Factors influencing the magnitude of stressesFactors influencing the magnitude of stresses
transmitted to abutment teethtransmitted to abutment teeth
Length of edentulous span.Length of edentulous span.
Quality of support of ridgeQuality of support of ridge..
• Large, well formed - ↑ stress distributionLarge, well formed - ↑ stress distribution
• Parallel walls - ↑ stabilityParallel walls - ↑ stability
• Thick muco periostium - ↑ supportThick muco periostium - ↑ support
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19. Qualities of claspQualities of clasp..
Type of claspType of clasp
Flexible retentive arm - ↓ stressFlexible retentive arm - ↓ stress
Wrought wire > vertical projectionWrought wire > vertical projection
claspclasp
Clasp designClasp design
Should be passiveShould be passive
↑↑ Length - ↑ flexibilityLength - ↑ flexibility
↑↑ diameter - ↓ flexibilitydiameter - ↓ flexibility
↑↑ taper - ↑ flexibilitytaper - ↑ flexibility
↑↑ curvature - ↑ flexibilitycurvature - ↑ flexibility
Clasp materialClasp material
Chrome alloy - ↑ stressChrome alloy - ↑ stress
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20. Abutment tooth surfaceAbutment tooth surface..
Gold crowns or restoration produce moreGold crowns or restoration produce more
resistance to clasp arm movement than naturalresistance to clasp arm movement than natural
toothtooth
Occlusal HarmonyOcclusal Harmony..
Improper occlusal relationshipImproper occlusal relationship
steep occlusal plane - ↑ stresssteep occlusal plane - ↑ stress
22ndnd
premolar and 1premolar and 1stst
molar – best area tomolar – best area to
withstand masticatory load.withstand masticatory load.
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21. Philosophies ofPhilosophies of RPDRPD Design &Design &
Stress DistributionStress Distribution
a) Stress Breakersa) Stress Breakers
b) physiologic basingb) physiologic basing
c) Broad Stress Distribution - the mostc) Broad Stress Distribution - the most
commonly subscribed todaycommonly subscribed today
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22. Design consideration to control stressDesign consideration to control stress
Direct retentionDirect retention
Retentive clasp arm – transmitsRetentive clasp arm – transmits
destructive forcesdestructive forces
Clasp should be active only duringClasp should be active only during
insertion and removal.insertion and removal.
Forces of adhesion and cohesionForces of adhesion and cohesion
Should cover maximum areaShould cover maximum area
Atmospheric pressureAtmospheric pressure
May contribute slight amount of retentionMay contribute slight amount of retention
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23. Frictional controlFrictional control
Frictional contact between theFrictional contact between the
prosthesis and guide plane – aid inprosthesis and guide plane – aid in
retentionretention
Guide planes – on as many teeth asGuide planes – on as many teeth as
possiblepossible
Neuromuscular controlNeuromuscular control
Patients ability to control the action ofPatients ability to control the action of
lips, cheeks and tongue - ↑ retentionlips, cheeks and tongue - ↑ retention
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24. Clasp positionClasp position
Relation of the retentive clasp to theRelation of the retentive clasp to the
ht of contour is more important thanht of contour is more important than
the no of clasps.the no of clasps.
Number and placement of claspsNumber and placement of clasps
1) Quadrilateral configuration1) Quadrilateral configuration
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26. Clasp designClasp design
Circumferential cast claspCircumferential cast clasp
• Should not engage mesio-buccalShould not engage mesio-buccal
undercutundercut
• Reverse circlet clasp is advisableReverse circlet clasp is advisable
Vertical projection or bar claspVertical projection or bar clasp
Combination claspCombination clasp
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27. Splinting of abutment teethSplinting of abutment teeth
Loss of periodontal attachmentLoss of periodontal attachment
Tapered rootTapered root
Short rootShort root
An isolated terminal abutmentAn isolated terminal abutment
Advocated byAdvocated by
CrownsCrowns
multiple rests and claspsmultiple rests and clasps
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28. Indirect retentionIndirect retention
Resist movement of theResist movement of the RPDRPD away fromaway from
the tissue basethe tissue base
Resists rotational movements of theResists rotational movements of the
denture around the fulcrum linedenture around the fulcrum line
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29. OcclusionOcclusion
in harmony with TMJ and neuromusculaturein harmony with TMJ and neuromusculature
Steep cuspal inclines avoidedSteep cuspal inclines avoided
Denture baseDenture base
Cover maximum areaCover maximum area
Maxilla – entire tuberosityMaxilla – entire tuberosity
Mandible – retromolar padMandible – retromolar pad
Type of impression will influence the amount ofType of impression will influence the amount of
stressstress
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30. Major connectorMajor connector
Should be rigid ,cover broad area for support ,Should be rigid ,cover broad area for support ,
stability, retention, which in turn reduces thestability, retention, which in turn reduces the
stresses transferred to the abutment teeth.stresses transferred to the abutment teeth.
Design principleDesign principle
L-bar principleL-bar principle
Circular configurationCircular configuration
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31. Minor connectorMinor connector
It connects the clasp assembly to theIt connects the clasp assembly to the
major connector.major connector.
Should not interfere with the placementShould not interfere with the placement
of artificial teeth.of artificial teeth.
OFFERSOFFERS
Horizontal stability to partial dentureHorizontal stability to partial denture
Stabilization against lateral stressesStabilization against lateral stresses
to the abutment tooth.to the abutment tooth.
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32. RestsRests
Directs forces all along the long axis ofDirects forces all along the long axis of
the abutment teeth.the abutment teeth.
Floor of the rest seat should be lessFloor of the rest seat should be less
than 90°than 90°
Seat should be saucer-shaped andSeat should be saucer-shaped and
completely devoid of any sharp anglescompletely devoid of any sharp angles
or ledges.or ledges.
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33. Few articles to quote….Few articles to quote….
Bridgeman et al (1997)….Bridgeman et al (1997)….
For the 0.75 mm undercut specimens, thereFor the 0.75 mm undercut specimens, there
was less loss of retention for clasps made from purewas less loss of retention for clasps made from pure
titanium and titanium alloy than for cobalt-chromiumtitanium and titanium alloy than for cobalt-chromium
clasps after 3 years. Porosity was more apparent in theclasps after 3 years. Porosity was more apparent in the
pure titanium and titanium alloy clasps than in thosepure titanium and titanium alloy clasps than in those
made from cobalt-chromium, but the amount of porositymade from cobalt-chromium, but the amount of porosity
did not correspond to evidence of fractures or permanentdid not correspond to evidence of fractures or permanent
deformation.deformation.
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34. Itoh et al (1998)Itoh et al (1998)
Under the same load conditions, the highestUnder the same load conditions, the highest
stresses developed in the model with the largeststresses developed in the model with the largest
osseous defect. Increasing the number of splinted teethosseous defect. Increasing the number of splinted teeth
did not provide a proportional decrease in maximumdid not provide a proportional decrease in maximum
stress levels. The more severe the osseous defect, thestress levels. The more severe the osseous defect, the
greater assistance was provided by splinting togreater assistance was provided by splinting to
periodontally sound teeth. This simulation studyperiodontally sound teeth. This simulation study
suggests that routine cross-arch splinting may not besuggests that routine cross-arch splinting may not be
appropriate.appropriate.
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35. Petridis (2001)Petridis (2001)
Removable partial dentures do not cause anyRemovable partial dentures do not cause any
adverse periodontal reactions, provided thatadverse periodontal reactions, provided that
preprosthetic periodontal health has been establishedpreprosthetic periodontal health has been established
and maintained with meticulous oral hygiene. Frequentand maintained with meticulous oral hygiene. Frequent
hygiene recalls and prosthetic maintenance are essentialhygiene recalls and prosthetic maintenance are essential
tools to achieve a good long-term prognosis.tools to achieve a good long-term prognosis.
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36. Ben-Ur et al (1999)Ben-Ur et al (1999)
-- In the maxillary arch, the most rigid majorIn the maxillary arch, the most rigid major
connector was the anteroposterior palatal barconnector was the anteroposterior palatal bar
combination placed on different horizontal and verticalcombination placed on different horizontal and vertical
planes. The most flexible was the U-shaped design. Inplanes. The most flexible was the U-shaped design. In
the mandibular arch, the most important factor inthe mandibular arch, the most important factor in
achieving rigidity was the cross-sectional shape of theachieving rigidity was the cross-sectional shape of the
major connector. The half pear-shaped cross sectionmajor connector. The half pear-shaped cross section
proved to be the most rigid.proved to be the most rigid.
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37. Sato et al (2001)Sato et al (2001)
studied the effects of buccolingual width andstudied the effects of buccolingual width and
position of occlusal rest seats on load transmission toposition of occlusal rest seats on load transmission to
the abutments for tooth-supported removable partialthe abutments for tooth-supported removable partial
dentures. And concluded that buccal shifting of the restdentures. And concluded that buccal shifting of the rest
seats seems to be advantageous for load transmissionseats seems to be advantageous for load transmission
to the abutmentsto the abutments..
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38. Gapido et al (2003)Gapido et al (2003)
the cast Co-Cr rests are more rigid and fatiguethe cast Co-Cr rests are more rigid and fatigue
resistant than Ag-Pd-Cu-Au rests. The fatigue resistanceresistant than Ag-Pd-Cu-Au rests. The fatigue resistance
of 0.8-mm-thick occlusal rests may be adequate if castof 0.8-mm-thick occlusal rests may be adequate if cast
with Co-Cr alloy. An increased number of casting defectswith Co-Cr alloy. An increased number of casting defects
may hasten the fatigue failure of occlusal rests.may hasten the fatigue failure of occlusal rests.
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