Operative Dentistry Lecture 2 - Tooth Preparation UPDATED
ACTUAL Questions and CORRECT Answers
tooth preparation definition mechanical alteration of a defective, injured, or diseased tooth to best receive a
restorative material that will reestablish a healthy state for the tooth, including
esthetic corrections where indicated, along with normal form and function
What is both the historical and current primary indication the presence of dental caries and destruction caused by carious lesions
for the necessity of restorative dentistry
Other than the presence of carious lesions, what 5 1. Replacement or repair of an existing restoration with serious defects
additional current indications exist for the need of 2. Teeth demonstrating a fracture
restorative dentistry? 3. Esthetic reasons
4. Replacement of adjacent teeth by certain prostheses
5. Preventative purposes in early stage caries progression
What are 2 common examples of serious defects on 1. Open margins
existing restorations that indicate necessity of restorative 2. Improper proximal contact
treatment?
Fractures that exist in what area of the tooth are area of function
especially important to restore? - occlusal surface/incisal edge
What are 2 common examples of prostheses that may 1. Partial Dentures
require adjacent tooth preparations? 2. Bridge
What is the primary cause of cavities (holes in the tooth)? Demineralization of the natural tooth structure caused by acid producing bacteria
T/F: tooth preparations and "cavity" preparations are True
synonyms for the same procedure
T/F: preparation and restoration of teeth addresses the true
replacement of destroyed or defective tooth structure
T/F: preparation and restoration of teeth cures the false
disease process (dental caries)
What other factors must the dentist address to cure the Patient factors:
disease process of dental caries? - bacteria
- diet
- hygiene and habits
, What are the 4 objectives of Tooth Preparations? 1. Remove all defects while protecting the pulp
2. Conservative extension of restoration
3. Design for under-/para-function
4. Maintain esthetics with functionality
When designing for under-/parafunction in a tooth tooth/restoration will not fracture
restoration, what is Resistance?
When designing for under-/parafunction in a tooth restoration will not be displaced
restoration, what is Retention?
What are the 2 stages of Tooth Preparations? 1. Initial - mechanical alteration into sound, supported enamel/dentin to specific
pulpal and axial depths
2. Final - extensions made to preparation that removes remaining carious tooth
structure/pre-existing restorations (if necessary) and final adjustments are made
to preparation form that enhance resistance and retention
The Initial stage of tooth preparation includes what 4 Step 1: Outline form and initial depth
steps? Step 2: create primary Resistance form through sufficient reduction of form so
that restoration and tooth do not fracture during occlusion
Step 3: create primary Retention form via angulation of walls to prevent
dislodging of the restoration from preparation
Step 4: create the Convenience form which provides ability to see and operate
adequately in the surgical field
The Final stage of tooth preparation includes what 5 Step 5: Remove remaining infected dentin and/or old restoration
steps? Step 6: provide Pulp protection (if needed)
Step 7: create Secondary resistance and retention (i.e. retentive grooves/slots)
Step 8: Finish and smooth external walls
Step 9: Clean and inspect (seal if needed)
What 3 overarching factors contribute to an operator's 1. General factors
decisions in tooth preparation form? 2. Conservation of tooth structure
3. Restorative material to be used
What are the 3 General subfactors that affect decisions A. Diagnosis – What is the cause necessitating restoration?
on preparation form? - Caries
- Fracture
- how is the Occlusion
B. Dental Anatomy – What morphological factors will contribute to preparation
design (and restoration):
- Enamel rods
- Pulp location
C. Patient Factors – What is the patient’s:
- dental IQ?
- desire?
- Economic status?
- Age?
- Habits?
ACTUAL Questions and CORRECT Answers
tooth preparation definition mechanical alteration of a defective, injured, or diseased tooth to best receive a
restorative material that will reestablish a healthy state for the tooth, including
esthetic corrections where indicated, along with normal form and function
What is both the historical and current primary indication the presence of dental caries and destruction caused by carious lesions
for the necessity of restorative dentistry
Other than the presence of carious lesions, what 5 1. Replacement or repair of an existing restoration with serious defects
additional current indications exist for the need of 2. Teeth demonstrating a fracture
restorative dentistry? 3. Esthetic reasons
4. Replacement of adjacent teeth by certain prostheses
5. Preventative purposes in early stage caries progression
What are 2 common examples of serious defects on 1. Open margins
existing restorations that indicate necessity of restorative 2. Improper proximal contact
treatment?
Fractures that exist in what area of the tooth are area of function
especially important to restore? - occlusal surface/incisal edge
What are 2 common examples of prostheses that may 1. Partial Dentures
require adjacent tooth preparations? 2. Bridge
What is the primary cause of cavities (holes in the tooth)? Demineralization of the natural tooth structure caused by acid producing bacteria
T/F: tooth preparations and "cavity" preparations are True
synonyms for the same procedure
T/F: preparation and restoration of teeth addresses the true
replacement of destroyed or defective tooth structure
T/F: preparation and restoration of teeth cures the false
disease process (dental caries)
What other factors must the dentist address to cure the Patient factors:
disease process of dental caries? - bacteria
- diet
- hygiene and habits
, What are the 4 objectives of Tooth Preparations? 1. Remove all defects while protecting the pulp
2. Conservative extension of restoration
3. Design for under-/para-function
4. Maintain esthetics with functionality
When designing for under-/parafunction in a tooth tooth/restoration will not fracture
restoration, what is Resistance?
When designing for under-/parafunction in a tooth restoration will not be displaced
restoration, what is Retention?
What are the 2 stages of Tooth Preparations? 1. Initial - mechanical alteration into sound, supported enamel/dentin to specific
pulpal and axial depths
2. Final - extensions made to preparation that removes remaining carious tooth
structure/pre-existing restorations (if necessary) and final adjustments are made
to preparation form that enhance resistance and retention
The Initial stage of tooth preparation includes what 4 Step 1: Outline form and initial depth
steps? Step 2: create primary Resistance form through sufficient reduction of form so
that restoration and tooth do not fracture during occlusion
Step 3: create primary Retention form via angulation of walls to prevent
dislodging of the restoration from preparation
Step 4: create the Convenience form which provides ability to see and operate
adequately in the surgical field
The Final stage of tooth preparation includes what 5 Step 5: Remove remaining infected dentin and/or old restoration
steps? Step 6: provide Pulp protection (if needed)
Step 7: create Secondary resistance and retention (i.e. retentive grooves/slots)
Step 8: Finish and smooth external walls
Step 9: Clean and inspect (seal if needed)
What 3 overarching factors contribute to an operator's 1. General factors
decisions in tooth preparation form? 2. Conservation of tooth structure
3. Restorative material to be used
What are the 3 General subfactors that affect decisions A. Diagnosis – What is the cause necessitating restoration?
on preparation form? - Caries
- Fracture
- how is the Occlusion
B. Dental Anatomy – What morphological factors will contribute to preparation
design (and restoration):
- Enamel rods
- Pulp location
C. Patient Factors – What is the patient’s:
- dental IQ?
- desire?
- Economic status?
- Age?
- Habits?
