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MARGIN PLACEMENT

Finish line should be placed in enamel whenever possible.

•Many situations in which sub-gingival margins are unavoidable.

1.Caries

2.To increase retention

3.Esthetics

4.Extension of previous restoration

5.Trauma.

6.Lower contact area

7.Modification of Axial contour

 

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MARGIN PLACEMENT

•         Whenever possible, the margin of the preparation should be supragingival and in the enamel so that margin can be finished by the dentist easily and kept clean by thepatient. •         In addition,finish lines must be placed so that they can be duplicated by the impression without tearing or deformation.

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