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Accuracy of cone beam computed tomography is limited at implant sites with a thin buccal bone: A laboratory study
Malmö University, Faculty of Odontology (OD).
Malmö University, Faculty of Odontology (OD).ORCID iD: 0000-0002-8279-7943
Malmö University, Faculty of Odontology (OD).
Aarhus University.
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2021 (English)In: Journal of Periodontology, ISSN 0022-3492, E-ISSN 1943-3670, Vol. 92, no 4, p. 592-601Article in journal (Refereed) Published
Abstract [en]

Background: To evaluate whether buccal bone thickness (BBT), implant diameter, and abutment/crown material influence the accuracy of cone beam computed tomography (CBCT) to determine the buccal bone level at titanium implants.

Methods: Two implant beds (i.e., narrow and standard diameter) were prepared in each of 36 porcine bone blocks. The implant beds were positioned at a variable distance from the buccal bone surface, thus resulting in 3 BBT groups (i.e., > 0.5-1.0; > 1.0-1.5; > 1.5-2.0 mm). In half of the blocks, a buccal bone dehiscence of random extent ("depth") was created and implants were mounted with different abutment/crown material (i.e., titanium abutments with a metal-ceramic crown and zirconia abutments with an all-ceramic zirconia crown). The distance from the implant shoulder to the buccal bone crest was measured on cross-sectional CBCT images and compared to the direct measurements at the bone blocks.

Results: While abutment/crown material and implant diameter had no effect on the detection accuracy of the buccal bone level at dental implants in CBCT scans, BBT had a significant effect. Specifically, when BBT was ≤ 1.0 mm, a dehiscence was often diagnosed although not present, i.e., the sensitivity was high (95.8%), but the specificity (12.5%) and the detection accuracy (54.2%) were low. Further, the average measurement error of the distance from the implant shoulder to the buccal bone crest was 1.6 mm.

Conclusions: Based on the present laboratory study, BBT has a major impact on the correct diagnosis of the buccal bone level at dental titanium implants in CBCT images; in cases where the buccal bone is ≤ 1 mm thick, detection of the buccal bone level is largely inaccurate. This article is protected by copyright. All rights reserved.

Place, publisher, year, edition, pages
John Wiley & Sons, 2021. Vol. 92, no 4, p. 592-601
Keywords [en]
alveolar process, cone-beam computed tomography, dental implants, titanium, zirconium
National Category
Dentistry
Identifiers
URN: urn:nbn:se:mau:diva-18158DOI: 10.1002/JPER.20-0222ISI: 000569443500001PubMedID: 32846005Scopus ID: 2-s2.0-85090991592OAI: oai:DiVA.org:mau-18158DiVA, id: diva2:1462836
Available from: 2020-08-31 Created: 2020-08-31 Last updated: 2024-02-26Bibliographically approved

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Bertl, KristinaHellén-Halme, KristinaStavropoulos, Andreas

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