Dental Materials Exam 1 Questions & Answers | Chapters 1, 8, 9, 21, 25 & 27 | Dental Assisting Exam Prep
Biomaterials act as ____________ materials for oral tissues/ replacement
structures.
What are the restrictions on material use? Biting forces, Degradation of materials, biocompatibility, and allergies.
_________ trials are the most reliable source of information Clinical
for most products
Classification of Dental Caries & Restorations: ● Class I: The pits and fissures of posterior teeth
● Class II: The interproximal of posterior teeth
● Class III: The interproximal of anterior teeth
● Class IV: The interproximal & incisal edge of anterior teeth
● Class V: The gingival third of the facial and lingual surfaces of both anterior
and posteriorteeth
● Class VI: Incisal edge of anterior teeth
(there will be a question)
What are the most common reason for failures? - Operator error!!
- failure to isolate
- wet field
- uncooperative patient defective product
What are contraindications for sealants? - deep cavitated lesions
- very smooth surfaces
- not at risk for caries
Purpose and indications for sealants? Who should -Deep grooves
receive them? -High risk for caries
-Presence of existing incipient caries
Pit and fissure sealant material will flow into the deep pit and fissured areas on
occlusal surfaces and seal them from bacterial activity
, Dental Materials Exam 1 Questions & Answers | Chapters 1, 8, 9, 21, 25 & 27 | Dental Assisting Exam Prep
Sealant Procedure 1. Listen to occlusion
2. Surface preparation: clean/remove debris
3. Isolation: rubber dam or cotton rolls
4. Dry the tooth, apply etchant 37% phosphorus acid 15-20 seconds, agitate
etch, rinse thoroughly for 30 seconds
5. Evaluate the etched tooth surface
6. Dry the tooth again for 15 seconds (tooth should appear chalky white)
7. Apply a primer from a dentinal bonding system - acts as wetting agent to
improveadhesion (optional)
8. Apply the sealant to the tooth surface, may need an explorer (Shepard's
hook or explorer)) to helpspread material
9. Polymerize the sealant (light cure 20 seconds)
10. Evaluate the sealant, attempt to dislodge
11. Floss between teeth to check for inter-proximal sealant
12. Check occlusion with articulating paper
What are some forms of isolation for a sealant? Cotton triangles, Garmer cotton roll holders
What are the two types of sealants? Unfilled - will wear down (no adjustment needed)
Filled - won't wear down (requires bur)
For light activated sealants the clinician should use: amber eyeglasses/ sheild
Before placing etchant, be certain that the ______ of the tip, freely
syringe is securely attached and the etchant flows _______.
When was the ADA established? 1859
Dental sealants are effective in ________ dental caries. C
3 multiple choice options
A. Reversing
B Restoring
C. Preventing
D. Proliferating
Biomaterials act as ____________ materials for oral tissues/ replacement
structures.
What are the restrictions on material use? Biting forces, Degradation of materials, biocompatibility, and allergies.
_________ trials are the most reliable source of information Clinical
for most products
Classification of Dental Caries & Restorations: ● Class I: The pits and fissures of posterior teeth
● Class II: The interproximal of posterior teeth
● Class III: The interproximal of anterior teeth
● Class IV: The interproximal & incisal edge of anterior teeth
● Class V: The gingival third of the facial and lingual surfaces of both anterior
and posteriorteeth
● Class VI: Incisal edge of anterior teeth
(there will be a question)
What are the most common reason for failures? - Operator error!!
- failure to isolate
- wet field
- uncooperative patient defective product
What are contraindications for sealants? - deep cavitated lesions
- very smooth surfaces
- not at risk for caries
Purpose and indications for sealants? Who should -Deep grooves
receive them? -High risk for caries
-Presence of existing incipient caries
Pit and fissure sealant material will flow into the deep pit and fissured areas on
occlusal surfaces and seal them from bacterial activity
, Dental Materials Exam 1 Questions & Answers | Chapters 1, 8, 9, 21, 25 & 27 | Dental Assisting Exam Prep
Sealant Procedure 1. Listen to occlusion
2. Surface preparation: clean/remove debris
3. Isolation: rubber dam or cotton rolls
4. Dry the tooth, apply etchant 37% phosphorus acid 15-20 seconds, agitate
etch, rinse thoroughly for 30 seconds
5. Evaluate the etched tooth surface
6. Dry the tooth again for 15 seconds (tooth should appear chalky white)
7. Apply a primer from a dentinal bonding system - acts as wetting agent to
improveadhesion (optional)
8. Apply the sealant to the tooth surface, may need an explorer (Shepard's
hook or explorer)) to helpspread material
9. Polymerize the sealant (light cure 20 seconds)
10. Evaluate the sealant, attempt to dislodge
11. Floss between teeth to check for inter-proximal sealant
12. Check occlusion with articulating paper
What are some forms of isolation for a sealant? Cotton triangles, Garmer cotton roll holders
What are the two types of sealants? Unfilled - will wear down (no adjustment needed)
Filled - won't wear down (requires bur)
For light activated sealants the clinician should use: amber eyeglasses/ sheild
Before placing etchant, be certain that the ______ of the tip, freely
syringe is securely attached and the etchant flows _______.
When was the ADA established? 1859
Dental sealants are effective in ________ dental caries. C
3 multiple choice options
A. Reversing
B Restoring
C. Preventing
D. Proliferating
