Matches in UGent Biblio for { ?s ?p Purpose : Cone beam CT (CBCT) provides three‐dimensional information and could absolutely be useful for evaluating circumferential implant bone levels. However, the accuracy and precision of the technique has not been described. The aim of the study was to assess the accuracy and precision of CBCT (i-CAT) using periapical radiographs (PA) as a reference and to evaluate the circumferential bone level on CBCT around immediately loaded single implants placed in healed ridges (CIT) and extraction sockets (IIT). Material and methods : PA and CBCT radiographs were obtained from 26 single Astra Tech Osseospeed™ implants 1year after immediate loading. For accuracy analysis, the 3 mesial and 3 distal interproximal levels obtained by CBCT were pooled to enable a comparison with PA. Precision was analyzed by intra- and inter-examiner reliability calculation from mesial and distal sites on CBCT. The circumferential bone level considered all 8 positions assessed on CBCT. Results : Accuracy of CBCT was low (R=0.325/p=0.019) given the fact that bone level of the total group was 0.70 mm (SD 0.78, range 0.00-3.20) on PA and 0.23 mm (SD 0.27, 0.00-1.20) on CBCT (p<0.001) with only 42% of the measurements showing deviation within 0.2 mm. However, intra- and inter-examiner reliability were favourable (R≥0.611/p<0.001, ≥83%). The mean circumferential bone level on CBCT was 0.21 mm (SD 0.30) and 0.26 mm (SD 0.18) for IIT and CIT, respectively. The impact of the treatment strategy was not significant. Conclusion : PA should be the standard technique in the clinical situation and CBCT is a valuable technique when more accurate information is needed. CBCT correlates poorly with interproximal bone level on PA, however, the precision of CBCT was high. CBCT requires further improvements of hardware and/or software. Within the limitations of the study there is an indication that the buccal bone 1 year after implant treatment is evenly preserved when implants are immediately loaded in extraction sockets or in healed bone.. }
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- aggregation abstract "Purpose : Cone beam CT (CBCT) provides three‐dimensional information and could absolutely be useful for evaluating circumferential implant bone levels. However, the accuracy and precision of the technique has not been described. The aim of the study was to assess the accuracy and precision of CBCT (i-CAT) using periapical radiographs (PA) as a reference and to evaluate the circumferential bone level on CBCT around immediately loaded single implants placed in healed ridges (CIT) and extraction sockets (IIT). Material and methods : PA and CBCT radiographs were obtained from 26 single Astra Tech Osseospeed™ implants 1year after immediate loading. For accuracy analysis, the 3 mesial and 3 distal interproximal levels obtained by CBCT were pooled to enable a comparison with PA. Precision was analyzed by intra- and inter-examiner reliability calculation from mesial and distal sites on CBCT. The circumferential bone level considered all 8 positions assessed on CBCT. Results : Accuracy of CBCT was low (R=0.325/p=0.019) given the fact that bone level of the total group was 0.70 mm (SD 0.78, range 0.00-3.20) on PA and 0.23 mm (SD 0.27, 0.00-1.20) on CBCT (p<0.001) with only 42% of the measurements showing deviation within 0.2 mm. However, intra- and inter-examiner reliability were favourable (R≥0.611/p<0.001, ≥83%). The mean circumferential bone level on CBCT was 0.21 mm (SD 0.30) and 0.26 mm (SD 0.18) for IIT and CIT, respectively. The impact of the treatment strategy was not significant. Conclusion : PA should be the standard technique in the clinical situation and CBCT is a valuable technique when more accurate information is needed. CBCT correlates poorly with interproximal bone level on PA, however, the precision of CBCT was high. CBCT requires further improvements of hardware and/or software. Within the limitations of the study there is an indication that the buccal bone 1 year after implant treatment is evenly preserved when implants are immediately loaded in extraction sockets or in healed bone.".