Practice #2: #14 MO Preparation and #12 MOD Restoration

#14 MO Composite Preparation

(Occlusal View)

Strengths

External Form:

• Occlusal outline form is centered over the grooves, smooth, and flowing
• Proper isthmus width
• Margins: Visually clear of contact ~0.2 mm
• Gingival floor: Clearance is ~0.5 mm
• Proximal box: Meets external surface at a 90 degree angle

Internal Form:

• Adequate pulpal floor depth (1.5-1.7 mm)
• B/L walls are convergent

*Slight adjacent tooth damage that can be polished without changing the contact

Areas Needing Improvement

External Form:

• Gingival margin of the proximal box is slightly friable
• Gingival floor width slightly deviated from ideal (<0.5 mm)

Refinement:

• Cavosurface margin is slightly friable
• Walls of preparation need smoothing

#12 MOD Composite Restoration

(Occlusal View)

Strengths

Occlusal Anatomy:

• Harmonious form of normal tooth anatomy
• Marginal ridge even with adjacent tooth

 Margins and Contacts:

• Proper distal contact and contour

Areas Needing Improvement

Occlusal Surface:

• Needs more anatomy and definition
• Slight amount of debris and/or staining

Margins and Contacts:

• Interproximal contour is slightly over-contoured
• Mesial Contact: Floss shredding/tearing due to over-contoured, tight contact

*Lingual view: #12 MOD Composite Restoration