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intra & Extra coronal

Inta & Extra Coronal Restoration Resistance Form

Introduction

  • building restoration is similar to building any mechanical structure, in that the stress pattern of the available foundation and contemplated sytucture must be predetermined.
  • The fundamental concept form of resistance form is based on reaction with the restoration and remaining tooth structure to the occlusal loading.
  • Resistance form may be defined as the shape and placement of preparation wall that best enables both the restoration and the tooth structure to withstand, without fracture, masticatory forces delivered principally in the ong axis of the tooth.

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