Podcast
Questions and Answers
What is the primary goal of the first step in mouth preparation?
What is the primary goal of the first step in mouth preparation?
Which procedure is NOT a part of periodontal therapy?
Which procedure is NOT a part of periodontal therapy?
What is the main purpose of creating retentive undercuts in abutment teeth preparation?
What is the main purpose of creating retentive undercuts in abutment teeth preparation?
In the context of occlusal rest seat preparation, what is a key design feature?
In the context of occlusal rest seat preparation, what is a key design feature?
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Which of the following best describes a cingulum rest seat?
Which of the following best describes a cingulum rest seat?
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What is the purpose of adjusting the occlusal plane during mouth preparation?
What is the purpose of adjusting the occlusal plane during mouth preparation?
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Which material is mentioned as a possible extension in the preparation of an occlusal rest seat?
Which material is mentioned as a possible extension in the preparation of an occlusal rest seat?
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What does the term 'reciprocation' refer to in the context of preparing abutment teeth?
What does the term 'reciprocation' refer to in the context of preparing abutment teeth?
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Which procedure is most crucial in ensuring the stability and retention of abutment teeth during preparation?
Which procedure is most crucial in ensuring the stability and retention of abutment teeth during preparation?
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What is an essential design feature of an occlusal rest seat?
What is an essential design feature of an occlusal rest seat?
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In the context of orthodontic procedures, which option primarily addresses malalignment?
In the context of orthodontic procedures, which option primarily addresses malalignment?
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What contributes to the modification of occlusal form during mouth preparation?
What contributes to the modification of occlusal form during mouth preparation?
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For a mandibular canine, what is a significant disadvantage of using an incisal rest seat?
For a mandibular canine, what is a significant disadvantage of using an incisal rest seat?
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What is the primary focus when performing ridge augmentation during oral surgical procedures?
What is the primary focus when performing ridge augmentation during oral surgical procedures?
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What is the main purpose of performing scaling and root planing in periodontal therapy?
What is the main purpose of performing scaling and root planing in periodontal therapy?
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What should be taken into account when creating retentive undercuts in abutment teeth?
What should be taken into account when creating retentive undercuts in abutment teeth?
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Study Notes
Mouth Preparation Steps
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Relief of pain and infection:
- This includes removing teeth causing pain or discomfort.
- Also includes treating inflamed gingiva (gums).
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Oral surgical procedures:
- This includes extracting non-restorable teeth and impacted teeth.
- Also includes removing interferences that are preventing proper function.
- Finally, this includes ridge augmentation to build up bone lost after tooth removal.
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Periodontal therapy:
- This involves a preventative hygiene program.
- It also includes scaling and root planing to remove plaque and tartar.
- Additionally, it involves eliminating local irritants that contribute to gum disease.
- Lastly, it includes pocket curettage which is the cleaning of the deeper areas of the gums where pockets have formed.
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Correction of occlusal plane:
- This involves reducing cusp heights to achieve a more balanced bite.
- It may also involve using cast onlays, crowns, or endodontic treatment and a crown to adjust the bite.
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Correction of malalignment:
- This can be achieved through orthodontics, crowns, enameloplasty, and endodontic treatment followed by a crown.
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Correction of occlusion:
- This involves modifying the occlusal form to equalize stresses by selective grinding.
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Abutment teeth preparation:
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Reshaping abutment teeth: This step involves creating guiding planes on the proximal and lingual surfaces.
- Proximal guiding planes: This step creates parallel surfaces on the surfaces of the teeth next to each other for stability, esthetics, and retention.
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Lingual guiding planes: This step creates parallel surfaces on the tongue side of the tooth.
- This creates reciprocation, which is resistance to horizontal forces, done by a retentive clasp arm to ensure stability.
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Changing height of contour: This involves adjusting the retentive clasp arm height in a way that balances both mechanical and aesthetic advantages.
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Creation of retentive undercuts: This involves creating a gentle depression or a slight concavity on the tooth surface.
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Crowns: This method is used when the remaining teeth do not possess the required contours.
- Rest seat preparation: This involves creating specific depressions on the tooth surface for placement of the supports.
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Occlusal rest seat: This involves designing a triangular-shaped depression located on the chewing surface of the tooth.
- The external margins and apex must be rounded to achieve a good fit.
- The floor should be spoon-shaped.
- The angle between the floor and the tooth surface should be less than 90 degrees.
- The extension depends on the material used: 1 mm for chromium cobalt alloy and 1.5 mm for gold.
- During preparation, the margins should be well-defined, angles smoothened, and fluoride gel applied.
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Lingual or cingulum rest seat: This is indicated when no posterior tooth is available to place an occlusal rest.
- It's often used on maxillary canines or sometimes on incisors when the canine is missing and multiple rests are needed to distribute the load evenly.
- The design can be half-moon shaped (lingual) or V-shaped (proximal).
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Incisal rest seat: This is indicated on mandibular canines and used as an auxiliary rest for indirect retention.
- It is often placed on the distal side for esthetics.
- Disadvantages include it can be visually noticeable and exerts greater leverage compared to lingual rests.
Mouth Preparation Steps
-
Relief of Pain and Infection: Removing teeth causing pain or inflamed gingiva.
-
Oral Surgical Procedures:
- Extracting non-restorable and impacted teeth.
- Excising interferences.
- Performing ridge augmentation.
-
Periodontal Therapy:
- Implementing preventive hygiene programs.
- Performing scaling and root planing.
- Eliminating local irritating factors.
- Performing pocket curettage.
-
Correction of Occlusal Plane:
- Reducing cusp heights.
- Using cast onlays, crowns, and endodontic therapy with crowns.
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Correction of Malalignment:
- Using orthodontics, crowns, enameloplasty, and endodontic treatment with crowns.
-
Correction of Occlusion:
- Modifying occlusal form to equalize stresses by selective grinding.
Abutment Teeth Preparation
-
Guiding Plane Preparation: Obtaining parallel surfaces on proximal and lingual surfaces, parallel to the path of insertion.
- Proximal Guiding Plane Function: Provides stability, aesthetics, and retention.
- Lingual Guiding Plane Function: Provides reciprocation, which is resistance to horizontal forces by the retentive clasp arm.
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Changing Height of Contour:
- Retentive clasp arm should not be higher than the junction between the occlusal and gingival third. This offers mechanical and aesthetic advantages.
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Creation of Retentive Undercuts:
- Creating a gentle depression, a slight concavity.
Crowns
- Used when remaining teeth lack natural contours.
Rest Seat Preparation
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Occlusal Rest Seat:
- Triangular shape.
- External margins and apex rounded.
- Spoon-shaped floor.
- Angle between floor and tooth surface less than 90 degrees.
- Extension: 1 mm for chromium cobalt alloy and 1.5 mm for gold.
- Preparation: Low margin reduction, deep floor seat, smooth angles, and fluoride gel application.
-
Lingual or Cingulum Rest Seat:
- Indicated when there is no posterior tooth to place an occlusal rest.
- Used on maxillary canines and, rarely, incisors when the canine is missing.
- Multiple rests distribute the load over a number of incisors.
- Design: Half-moon shape (lingual) and V-shape (proximal).
-
Incisal Rest Seat:
- Indicated on mandibular canines and used as an auxiliary rest for indirect retention.
- Designed on the distal side for aesthetics.
- Disadvantages: Metal display and greater mechanical leverage than lingual rests.
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Description
This quiz covers the essential steps involved in mouth preparation for dental procedures. Topics include pain relief, oral surgery, periodontal therapy, and correction of occlusal planes. Test your knowledge on techniques and practices used in dental care.
