Abutment margin levels and residual cement occurrence in cement‐retained implant restorations: An observational study

Objectives To evaluate the association between different vertical levels of the abutment margin and residual cement prevalence in cement‐retained implant restorations with customized abutments. Methods One hundred and nine single‐unit cement‐retained implant restorations with a screw‐access channel were included. The crowns were intraorally cemented on the abutments, and excess cement was removed. The abutment–crown complex was unscrewed, and the abutment–crown complex and peri‐implant tissue were photographed. Residual cement presence was recorded by dividing the abutment–crown complex and peri‐implant tissue into four quadrants: mesial, distal, buccal, and lingual. The prevalence of residual cement was compared according to the height of the custom abutment margin of the corresponding quadrant. A multilevel model was used for statistical analysis (α = .05). Results Cement remnants were discovered on 72.48% of the dental implants. When the restoration quadrants were compared, cement remnants were present on 51.38%, 39.45%, 20.18%, and 17.43% of the mesial, distal, buccal, and lingual surfaces, respectively (p