Assessment of bone dimension surrounding dental implants by CBCT- a meta-analysis

The dimensional change of buccal bone around dental implants may beaccompanied by cone-beam computed tomography (CBCT). The purpose of this study was to evaluate the accuracy of CBCT for the assessment of the buccal bone dimension surrounding dental implants.The search was performed in eight electronic databases until May 2016, and a search update was undertaken in September 2016. Studies which assessed the accuracy of CBCT in measuring bone dimension surrounding dental implants were evaluated. Individual risk of bias was determined by Quality Assessment Tool for Diagnostic Accuracy Studies-2 (QUADAS-2). The overall effect size was determined by means of the z-test and Q test was used to evaluate the homogeneity of effect sizes among studies. I2 was applied to determine the variance within studies. Three studies were considered eligible for this review. The mean difference [confidence interval] between CBCT and the reference standard was -0.71mm [-1.50;0.09mm] for bone level and -0.2 mm [-0.41;0.37mm] for bone thickness. The accuracy of CBCT to assess bonesurrounding implants was considered acceptable.