**8.7 Excess cement and over-contoured supra-structures**

Potential risk indicators that are indirectly related to plaque accumulation have been proposed; for example, constructions with excess cement may result in a higher prevalence of peri-implantitis than screw-retained constructions [51]; similar results were

#### **Figure 3.** *A case of peri-implantitis consequent to over-contoured restoration.*

reported for over contoured crowns and supra-structures [52]. A wide emergence profile in the restoration contour was reported to cause an unhealthy state (**Figure 3**) [53].
