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ObjectivesTo update the findings of a systematic review from the year 2016 on the evidence for the accuracy and potential benefits of cone beam computed tomography (CBCT) in periodontal diagnostics.Material and methodsA systematic literature search was performed and the criteria for PICO, PRISMA and risk of bias assessment were applied. Only clinical trials (> 10 patients) conducted in humans on periodontal bone loss, i.e. vertical and/or horizontal or furcation involvement, in CBCT compared with clinical and/or conventional radiographic measures were included.ResultsFrom 1152 articles identified, 11 case series on furcations and eight on vertical and/or horizontal bone loss were included. The studies showed moderate risk of bias and heterogeneous study designs. The agreement between non-surgical clinical or two-dimensional radiographic assessments of horizontal, vertical or interfurcal bone loss and CBCT measurements was analysed in 11 studies and was low in six studies with comparable study designs. A high accuracy (80–84%) of CBCT measurements compared with intra-surgical findings of furcation involvement was observed in four studies. Comparing CBCT with intra-surgical measurements of vertical or horizontal bone loss, an accuracy between 58 and 93% was found in four out of six studies. Three studies were analysed and indicated benefits of CBCT in decision making and/or a reduction of treatment costs and time in teeth of interest.ConclusionsThe findings provide additional evidence for the accuracy of CBCT in assessing periodontal bone loss.Clinical relevanceCBCT is an accurate diagnostic tool in periodontology, which needs to be carefully considered in certain situations.

ObjectivesMagnetic resonance imaging (MRI) is a well-established diagnostic tool in various areas of medicine. The technique provides radiographic images in the absence of ionizing radiation. The aim of the present analysis was to evaluate the best available current external evidence for application of MRI in operative dentistry.Material and methodsA systematic literature search was performed for studies published by August 2019 in three electronic databases (MEDLINE, Embase via Ovid, Cochrane Library) supplemented by a hand search. The PRISMA criteria were applied to a PICO question. Data were extracted and summarized in data extraction files, and a quality assessment of the included studies was performed.ResultsFrom 287 titles identified, 12 case series with two studies on caries detection, six studies on endodontic, and four studies on anatomical aspects were eligible for inclusion. The studies included showed a high level of heterogeneity and summarized data from 343 subjects. The data available indicate potential of certain MRI settings for diagnostic of caries lesions, presentation of pulp tissues and periapical lesions, and the localization of impacted teeth.ConclusionsThe limited currently available evidence shows potential of certain MRI settings for the use in operative dentistry. Further research needs to assess the applicability and accuracy for dental hard tissues as well as cost-benefit aspects of the MRI technique.Clinical relevanceCertain MRI settings may have the potential as diagnostic tool in operative dentistry.