ACC Prep

Question 1

Advantages of ACC

Answer 1

Excellent Translucency

Best color stability

Biocompatibility

Silica based can be bonded to tooth structure

Question 2

Disadvantages of ACC

Answer 2

Brittle (fractures)

Proximal and lingual reduction

Margin adaptation

Critical cavosurface angle

Not for FPD abutment

Opposing tooth wear

Question 3

ACC Indications

Answer 3

High esthetic demand

Conservative restoration inadequate

Sufficient tooth structure to support restoration

Favorable occlusal load

Question 4

ACC Contraindications

Answer 4

Reduced esthetic demand

More conservative restoration is achievable

Unable to provide adequate support or even circumferential shoulder of 1 mm

Cast post and core

Unfavorable occlusal load

Parafunctional activity

Question 5

Biologics - Fixed restorations

Answer 5

Conservation of tooth structure

Avoidance of overcontouring

Supragingival Margins

Harmonious occlusion

Protection against tooth fracture

Question 6

Mechanical - Fixed Restorations

Answer 6

Retention form

Resistance form

Deformation

Question 7

Esthetic - Fixed Restoration

Answer 7

Minimum display of metal

Maximum thickness of porcelain

Porcelain occlusal surfaces

Subgingival margins

Question 8

Diameters of Burs:

747
242
243
256

Answer 8

0. 7/1.1
1. 9/1.4
2. 2/1.6
3. 3/1.6

Question 9

Diameters of Burs:

702

770

862

285

Answer 9

0. 9/1.4
1. 2/1.7
2. 1/4.0
3. 3/2.2

Question 10

ACC Prep Specifications:

Incisal Reduction

Facial Axial Reduction

Chamfer

Lingual Clearance

Outline

Answer 10

2 mm

1. 2 mm
2. 0 mm
3. 8 mm
4. 5 mm above free gingiva