#5 Class V Ag Preparation

Amalgam Preparations
Written By Julia Noguchi

Measurements

Axial Depth: 1.5 mm

  • RGS 4 (W)

Gingival Margin: 0.5 mm above CEJ

  • RGS 1 (W)

Incisogingival Length: 2.0 - 2.5 mm

  • RGS 2 (L)

Mesiodistal Dimension: mesial line angle to distal line angle

Other Features

*Exit angles: 90º along all margins

Shape: kidney bean or crescent shape

Convex axial wall

Retention Grooves

  • Incisal wall

  • Gingival wall

Isolation

212 Clamp

  • Stabilized with green compound

  • buccally positioned hole in rubber dam

Julia Noguchi
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#5 Class V Amalgam Restoration
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#20 MO Ag Restoration