Accuracy of periapical radiography in assessing bone level in implants affected by peri-implantitis: a cross-sectional study.

Aim The aim of this study was to assess the accuracy of periapical radiography in measuring peri-implant bone levels. Materials and Methods Twenty-five subjects with 46 implants in need of surgical treatment for peri-implantitis were included in this cross-sectional study. Prior to surgery, periapical radiographs were taken, a prediction of type of defect was made and radiographic peri-implant bone levels ( Rx BL) were determined at the mesial and distal aspects. Intra-operatively, the peri-implant bone level ( Surg BL) was assessed mesially, distally, buccally and orally and the type of defect was recorded. A paired t-test was applied to detect differences between inter-proximal Rx BL and Surg BL. ANOVA was used to compare Surg BL at different circumferential positions. Results The mean inter-proximal Rx BL was 4.0 ± 2.2 mm and the mean inter-proximal Surg BL was 5.3 ± 2.3 mm. The difference between Rx BL and Surg BL was statistically significant ( p = 0.014). There were no significant differences in Surg BL at the mesial, distal, buccal and oral aspects ( p > 0.05). Conclusions The intra-operatively measured peri-implant bone levels were more apical than the radiographic bone levels. The intra-operatively assessed peri-implant bone levels ( Surg BL) were similar at all the circumferential positions around the implant. [ABSTRACT FROM AUTHOR]