Effect of abutment design and methods for controlling on the amount of residual luting agent around the margins of implant restorations

Abstract

Objectives: The aim of this study was to investigate the amount of excess cement after cementation using three different cement application methods and to compare the effect of two different abutment designs on the residual cement in cement-retained implant restorations. Material and methods: A maxillary cast was used to simulate implant placement in the lateral incisor region. Implant analogs were embedded in the maxillary cast. Right lateral custom abutment was designed non anatomically and left lateral custom abutment was designed anatomically with computer-aided design. After the screw channels were closed, a total of 80 monolithic translucent zirconia crowns were fabricated. Crowns were cemented with 3 different cementation techniques and without any technique in the control group. The amount of residual cement measured by computerised planimetric cement evaluation method. Results: The lowest residual cement area was observed in the anatomic-teflon group, and the highest residual cement area was observed in the non-anatomic control group. In anatomic abutment design group, there was no significant difference between the control and rubber dam group (p > 0.05), but significant difference was found between control and other groups (p < 0.05). In non-anatomic group, statistically significant differences were found between the control and other groups (p < 0.05). Conclusions: The anatomic abutment design significantly reduced the amount of residual cement compared to the non-anatomic abutment design. It was concluded that PVS replica technique was the most effective cementation technique in terms of residual cement.

Keywords

• Abutment design
• cement-retained restorations
• excess cement
• residual cement

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