Читать книгу Fundamentals of Fixed Prosthodontics - James C. Kessler - Страница 91

Teeth with low esthetic requirements and small- to moderatesized lesions can be restored with metal inlay restorations (Fig 6-10). Although usually made of softer gold alloys, metal inlays also can be fabricated of etchable base metal alloys if a bonding effect is desired.^11,12 The preparation isthmus should be narrow to minimize stress in the surrounding tooth structure. Premolars should have one intact marginal ridge to preserve structural integrity and minimize the possibility of coronal fracture.

The additional bulk of tooth structure found in a molar permits the use of this restoration type in an MOD configuration. The indications for this type of restoration are much the same as those for an amalgam because this restoration only replaces lost tooth structure and will not protect remaining tooth structure. Because of the amount of destruction of tooth structure required by this restoration, it is not recommended for incipient lesions.