An introductory and simple guide assembled by dental students and reviewed by Dr. Hasannin Al-Namel. our seminar about impression trays used in prosthodontics
Anatomy and clinical significance of denture bearing areasOgundiran Temidayo
A presentation on the anatomy and clinical significance of the denture bearing areas by Ogundiran Temidayo who is a dental student at OBAFEMI AWOLOWO UNIVERSITY ILE-IFE
A number of theories have been put forward for impressions. each having its own advantage and disadvantage.
Different spacers guide and aid in in making the desired impression with adequate pressure in the desired region of the arch in maxilla and mandible. different materials are used for spacers depending on the need.
this contains the steps for the class 1 cavity preparation for amalgam in detail. also contains the difference between composite and amalgam cavity preparation.
Anatomy and clinical significance of denture bearing areasOgundiran Temidayo
A presentation on the anatomy and clinical significance of the denture bearing areas by Ogundiran Temidayo who is a dental student at OBAFEMI AWOLOWO UNIVERSITY ILE-IFE
A number of theories have been put forward for impressions. each having its own advantage and disadvantage.
Different spacers guide and aid in in making the desired impression with adequate pressure in the desired region of the arch in maxilla and mandible. different materials are used for spacers depending on the need.
this contains the steps for the class 1 cavity preparation for amalgam in detail. also contains the difference between composite and amalgam cavity preparation.
A Complete presentation explaining the complete morphology of Maxillary first molar, for the benefit of people like me who tried and failed to find everything in one package
A custom made device prepared for a particular patient which is used to confine and control an impression material making an impression.
It makes on the cast obtained from primary impression.
It is used for making final impression.
Edentulous ridge shows variations in shape and size.
It shows the type of impression technique
1, Selective pressure technique
2, Minimal pressure technique
secondary impression / final impression in complete denture.
#prosthodontics
#prostho
BDS 4th year
Nischala Chaulagain
Nobel Medical College , Biratnagar
This short-notes present to you an important topic in practice of endodontics. Sodium accident is not uncommon to clinical practice, and endodontic practitioner should have thorough knowledge of its causes, prevention and management.
Written and summaries by Dr. Osamah Ahmed Asadi
For Iraqi Dental Academy
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Also You can find all our lectures here at Google Drive link:
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In this lecture we will present to you in simple-choice of words, the instrument used most commonly in oral surgery. Each instrument is provided with pictures and brief explanation.
=====
This lecture is brought to you by: Iraqi Dental Academy
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====
All our lectures are uploaded here on slideshare, also you can grap them as PDF lectures in the following link for free:
https://drive.google.com/open?id=0B65zuL7B4IbBVlZ3NkY2aGZ4TXc
==
All credits goes to Dr. Osamah Asadi, B.D.S, CEO of Iraqi Dental Academy and the author of the content.
In this lecture we explain to you, in simple terms, the buccal object rule or what's known as SLOB rule (same lingual, opposite buccal).
This rule is very helpful radiographic aid, that many clinicians use in daily routine.
====
This lecture is brought to you by: Iraqi Dental Academy
Follow us on Facebook:
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Follow us on Instagram:
https://www.instagram.com/ida_lectures/
Follow us on Telegram:
https://t.me/ida_lectures
====
All our lectures are uploaded here on slideshare, also you can grap them as PDF lectures on the following link for free:
https://drive.google.com/open?id=0B65zuL7B4IbBVlZ3NkY2aGZ4TXc
==
All credits goes to Dr. Osamah Asadi, B.D.S, CEO of Iraqi Dental Academy and the author of the content.
Endodontic Root Perforation: Causes, Identification, and Management LectureIraqi Dental Academy
This lecture present to you the concept of root perforation and its complications in endodontic practice. Management of such situation is also presented briefly.
Endodontic Root Perforation: Causes, Identification, and Management PresentationIraqi Dental Academy
This lecture present to you the concept of root perforation and its complications in endodontic practice. Management of such situation is also presented briefly.
This lecture talk about the disturbance of adrenal gland hormones and how it affect health. it also discuss in brief how to manage such condition in your dental clinic
This lecture talk about the disturbance of adrenal gland hormones and how it affect health. it also discuss in brief how to manage such condition in your dental clinic
This lecture present to you the very basics of dental management of asthmatic patient in dental clinics. I kept it short and comprehensive as I can, for more info please refer to the reference mentioned in the lecture
This lecture present to you the very basics of dental management of asthmatic patient in dental clinics. I kept it short and comprehensive as I can, for more info please refer to the reference mentioned in the lecture
Chronic Obstructive Pulmonary Disease Dental Management SlidesIraqi Dental Academy
This lecture discuss an important subject in dental clinic. COPD is the third leading cause of death in united state. this lecture is oriented to the level of mind of undergraduate students.
Chronic Obstructive Pulmonary Disease Dental Management LectureIraqi Dental Academy
This lecture discuss an important subject in dental clinic. COPD is the third leading cause of death in united state. this lecture is oriented to the level of mind of undergraduate students.
This lecture discuss the topic of dental management of medically compromised patient who suffers from diabetes mellitus. it's simple lecture that directed to the level of mind of undergraduate students. thanks for viewing and reading, and please share the knowledge!
Dental Management of Patient with Diabetes Mellitus PresentationIraqi Dental Academy
This lecture discuss the topic of dental management of medically compromised patient who suffers from diabetes mellitus. it's simple lecture that directed to the level of mind of undergraduate students. thanks for viewing and reading, and please share the knowledge!
Anesthesia for Restorative Dentistry and Endodontics PresentationIraqi Dental Academy
This lecture discuss very important topic in dental practice and that is the science and art of dental anesthesia. This lecture discuss various techniques, precautions, and tips about dental anesthesia for restoration and endodontics.
Anesthesia for Restorative Dentistry and Endodontics LectureIraqi Dental Academy
This lecture discuss very important topic in dental practice and that is the science and art of dental anesthesia. This lecture discuss various techniques, precautions, and tips about dental anesthesia for restoration and endodontics.
This brief lecture talk about very important topic in endodontic diagnosis and it is the Endodontic-Periodontal Relationship. It's directed to the level of mind of undergraduate students. I tried to keep it as simple and coherent as possible
This brief lecture talk about very important topic in endodontic diagnosis and it is the Endodontic-Periodontal Relationship. It's directed to the level of mind of undergraduate students. I tried to keep it as simple and coherent as possible
This lecture, which oriented to the level of mind of undergraduate students, discuss the topic of pulpectomy, its indications, contraindications, and procedural steps.
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in this comprehensive, easily-digestable lecture I try to explain the basic concept of pulpotomy procedure for pediatric patients. It's aim to the level of mind of undergraduate students.
Here I present to you the basic concept and definition of endodontic diagnosis and treatment planning. It is presented to the level of mind of undergraduate students.
Knee anatomy and clinical tests 2024.pdfvimalpl1234
This includes all relevant anatomy and clinical tests compiled from standard textbooks, Campbell,netter etc..It is comprehensive and best suited for orthopaedicians and orthopaedic residents.
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
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- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
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ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
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disorder called alcohol use disorder (AUD), with mild, moderate,
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In the DSM-5, all types of substance abuse and dependence have been
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from mild to severe. A diagnosis of AUD requires that at least two of
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AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
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the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
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NVBDCP was launched in 2003-2004 . Vector-Borne Disease: Disease that results from an infection transmitted to humans and other animals by blood-feeding arthropods, such as mosquitoes, ticks, and fleas. Examples of vector-borne diseases include Dengue fever, West Nile Virus, Lyme disease, and malaria.
2. Definition
is a device used to carry, confine & control the
impression material from the patient's mouth.
During impression making the tray facilitate insertion &
removal of impression material from the patient's
mouth.
3. Requirements Of Impression Trays
1. The tray should be rigid and strong but not too thick.
2. The tray should simulate the finished denture in size and shape.
3. The border extension of the tray should be 2mm short of the
vestibular depth with no interference with muscle or frenal
attachment.
4. The entire borders of the tray should be smooth and rounded.
5. The tray should retain its shape throughout the impression procedure
and pouring of impression.
6. The handle of the tray should be angulated.
6. Types of Impression Trays
Impression trays can be of various types:
1. According to the material used to fabricate the trays:
a. Metallic trays (stainless steel, Aluminum)
b. Non-metallic trays (plastic trays, acrylic resin trays)
7. 2. According to the method of fabrication of trays:
A. Stock trays:
- Full arch trays
- Sectional trays
- Quadrant trays
B. Custom trays or Special trays
8. 3. According to the teeth present /absent in mouth:
a. Edentulous trays
b. Dentulous trays
9. How can I identify between Dentulous and
Edentulous trays?
Dentulous Trays – Square Cross-Section For
patients with teeth!
Edentulous Trays – Rounded Cross-Section
For patients without teeth!
10. 4. According to the method of interlocking of material:
a. Perforated trays
b. Non-perforated trays
c. Rim-lock trays
i. Water-cooled
ii. Non water-cooled
11. What is the difference between Stock trays and
Custom trays?
STOCK TRAYS-
Stock trays are ready-made and comes in specific sizes. So stock trays must be selected
for best fit.
They are re-useable after sterilization.
CUSTOM TRAYS
Custom trays are fabricated on the particular patient’s cast thereby making it unique
to the patient. This is why custom trays always are a better fit than stock trays.
They are useful only for the particular patient- then discarded.
13. Definition
Impression tray that serve to carry the impression
material to the mouth & support it in the correct
position while it is hardening.
This type of the trays can be used for several patients &
used for making primary impression.
They are made of different materials such as Al, Tin,
Brass or Plastic, in variety of shapes, size to fit different
mouth.
14. Factors effect in selection of stock tray:
1- The type of material used in the primary impression procedure. e.g. impression
compound we used non-perforated tray, because it will be stick on the tray. And if we
use alginate material we should use perforated stock tray.
2- Size of the arch.
3- Form of the arch. (round , square , taper ).
4- The stock tray must covered all the anatomical landmarks needed in complete
denture & this is a most important point.
5- Stock tray should give a sufficient space to impression material in all direction.
15. Metal Trays
• Provide maximum support for impressionmaterials
•Rigid
•Durable and long lasting
•Can be perforated or solid
•Can be used with all elastometric materials
Properties
16.
17. Plastic Trays
• Disposable
• Eliminate cross-contamination
• Can be modified
• Rigid,thick walls to provide lateral support for the tray impression
material to prevent distortion when pouring the model
Properties
18.
19. What type of stock tray should I use?
Stock Trays are always selected to the best fit.
This selection is based on -
The type of mouth you want to make an impression of-
Dentulous Mouth – use Dentulous Trays.
Edentulous – use Edentulous Trays.
Partially Edentulous – use Combination Trays.
Type of impression material you want to use.
Elastic Impression Materials – generally use Perforated trays.
Inelastic materials – generally use Non-Perforated trays.
21. Definition
An individualized impression tray made from a cast recovered
from primary impression.
It is used in making a final impression.
Primary
Impression
Preliminary
Cast
Special Tray
Final
Impression
22.
23. Advantages of special trays:
1- Economy in impression material ( used less impression material required in
special tray).
2- More accurate impression.
3- Special tray provides even thickness of impression material. This minimize
tissue displacement & dimensional changes of impression material.
4- The work with special tray is more easier & quicker than modifying stock
tray to provide accurate impression.
5- Special tray is more accurately adapted to the oral vestibules, this helps in
better retention of denture.
6- Special tray are less bulky than stock tray which is more comfortable for
the patient.
24. Materials used for construction of special
tray:
Metallic Non-Metallic
Cast or Swaged Metal
(Time Consuming)
(Not popularly used)
Resin
Thermoplastic
Material
1. Cold cure acrylic
resin
2. Hot cure acrylic
resin
3. Light cure acrylic
resin
1. Shellac base plate
2. Impression
compound
25. Cold cure acrylic custom tray materials have
some disadvantages:
Polymerization shrinkage
A time interval must be allowed between the fabrication and
the use of these custom trays
The hazardous effects caused by the monomer (methyl
methacrylate) include dermatologic reactions
26. While Light cure acrylic resin is:
less hazardous,
reduces preparation time,
easy to use and
has good handling properties.
27. Types of Custom Tray
Close-fit Tray
Tray with spacer and stop
SPACER
(WAX)
(Openings in the wax where
acrylic will flow in to form
stops)
28. What is the difference between a close-fit tray
and a spaced tray?
CLOSE –FIT TRAY : As the name suggests, it is adapted directly on to the
cast without any wax spacer.
Usually used with impression materials that have a light viscosity to obtain
a wash impression, e.g. light bodied elastomers, ZOE impression paste.
TRAY WITH SPACER AND STOPS : these trays use a wax spacer to provide
space for the impression material. This is because impression materials
used here need extra space as they have higher viscosity e.g. Alginate,
medium and heavy bodied elastomers.
30. Criteria for Special tray construction :
1- The impression tray must not impinge upon movable structures.
2- The borders must be under extended (2mm) .
3- The posterior limits of the impression tray should be slightly over-
extended to ensure inclusion of the posterior detail for development of the
post-dam area in upper tray.
4- The tray should be rigid & of sufficient thickness that it will not fracture
during its use.
5- The tray must have a handle for manipulation & the handle must not
interfere with functional movement of the oral structures.
6- The tray must be smooth on its exposed surfaces, and should have no
sharp corner or edges which would injury the patient.
31. Equipment and Materials needed
Vaseline
Bunsen burner
Straight handpiece
Wax spatula, wax knife
Base plate wax, pink
Pencil,
32. Procedural Steps for custom tray with
spacer and stop
A. Preparation of the primary cast :
1. Undercuts should be find out with the help of
surveyor and should be blocked out .
33. 2. Outline of the border of the tray should be marked with pencil which
is 2/3 mm short of the reflection.
3.The relief areas should also be marked in the cast.
4. The border of the tray marked on the cast may be grooved deeper
using a carver.
34. B. Adapting the relief wax:
Relief wax should be adapted over the
relief areas marked on the cast.
35. Relief areas are:
In mandibleIn Maxilla
Crest of the residual ridge
Mental foramen
Genial tubercles
Torus mandibularis
Mylohyoid ridge
Incisive papilla
Canine eminence
Mid palatine raphe
Fovea palatinae
Sharp spiny ridges
Torus palatinus
Bony prominences
Undercut ridge
37. C. Adapting the spacer:
A spacer should be adapted throughout the extent of special
tray( coincide with the second line), except posterior palatal
seal area in maxilla and buccal shelf area in mandible.
38. Function of spacer:
a. The spacer allows the tray to be properly positioned in the
mouth during border molding procedure.
b. To allow the impression to have an even thickness of
impression material.
c. Prevent distortion of the material at final stage.
Materials used in spacer:
a. Baseplate wax
b. Non asbestos casting liner
39. D. The use of stops:
The spacer should be cut out in 2-4 places so that the special tray touches the ridge in
these areas .
Location: Usually 4 stoppers are placed,
Size and shape : Stopper can be 2mm square
or
2 by 4 mm rectangle
or
2 mm mesiodistally, palatally over the crest of the ridge and buccally half
way into the sulcus
40. Function of Tissue Stops:
1. To orient the tray
2. For uniform thickness of the impression material
41. E. Application of separating medium
Apply separating media on
the cast so that acrylic resin
does not stick to the cast.
Applying separating media
43. When monomer and polymer are mixed in the proper
proportions, a workable mass is produced. Upon standing, the
resultant mass passes through five distinct stages.
(1) Sandy
(2) stringy
(3) dough,
(4) rubbery, or elastic, and
(5) stiff
45. G. Fabrication of handle:
Criteria of handle :
1. The handle should be parallel to
the long axis of the teeth that
are to be replaced.
2. The handle should not arise
horizontally from the tray
because it may interfere with lip
movements.
3. It should be 3-4 mm thick ,
8 mm long , and 8 mm high.
46. 4. The vertical distance from the sulcus to the handle is 2 cm
5. The handle upstand must be made long enough for the handle to exit through the
oral commissure.
47. 6. For mandibular tray two posterior handle should be given as
finger rests.
48.
49. Functions of handle
1. Supports the lip while making impression.
2. Tray handles are particularly helpful when loading, placing and orientating custom
trays in the mouth.
Functions of finger rest
• Stabilize tray in mouth
• Equal distribution of pressure
• Reduces pressure applied to tissues
50. The next phase is preparing the tray for border molding
procedure:
51.
52.
53. Close-fit Tray
Follow all the steps mentioned previously except we skip
spacer and stop making.
Procedures
54. Sterilizing trays
Trays should be cleaned properly and sterilized before use
Disposable trays are recommended
Sterilization can be achieved by autoclaving, dry heat or chemical vapors