Over contouring of class II restoration:

 # Over contouring of class II restoration:

A. Leads to healing of periodontal tissues

B. Reduces the plaque in the subgingival area

C. Reduces food impaction by tight contacts

D. Leads to inflammation of the marginal gingiva

The correct answer is D. Leads to inflammation of the marginal gingiva.

Normal tooth contours must be recreated in the performance of operative dental procedures. Improper location and degree of facial or lingual convexities may result in iatrogenic injury in which the proper facial contour is disregarded in the design of the cervical area of a mandibular molar restoration. Overcontouring is the worst offender, usually resulting in increased plaque retention that leads to a chronic inflammatory state of the gingiva.

Ref: Sturdevant’s Art and Science of Operative Dentistry, 7th Edition, Page no 12

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