Diagnostic accuracy of three cone beam computed tomography systems and periapical radiography for detection of fenestration around dental implants

Abstract

Context: Early detection of peri-implant bone defects is highly important to prevent further bone loss and implant failure. Aims: This study aimed to assess the diagnostic accuracy of three cone-beam computed tomography (CBCT) systems and periapical radiography for detection of fenestration around dental implants. Methods: Thirty-one titanium implants were placed in the bovine ribs, in which peri-implant fenestration were simulated. Using a round fissure bur, fenestration defects were created in the apical-third region of implants. CBCT and PA radiographs were obtained before and after creating the defects. The results were analyzed using Chi-square test; kappa coefficient; Cochran's Q-test; McNemar's test; and sensitivity, specificity, positive predictive value, and negative predictive value; and receiver operating characteristic curve. Results: A significant agreement was noted between the two observers in the detection of defect-free samples in all imaging systems (P0.05). The results showed no significant difference among the four imaging systems in detection of defect-free samples while the difference was significant among the four groups for detection of defects (P