Ensuring clinical success begins with a careful discussion of treatment planning, comprehensively covering all variables in simple to complex cases for that requires multifaceted expertise. The interplay of periodontics and restorative dentistry is present at many fronts including the response of the gingival tissue to the restorative preparations. Dental restorations and periodontal health are inseparably interrelated. The adaptation of the margins, the contours of the restoration, the proximal relationships and the surface smoothness have a critical biological impact on the gingiva and the supporting periodontal tissues. Proper attention to preparation design and restoration placement and finishing, can be used to successfully restore form, function, and esthetics to defective areas of teeth.