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Mello HN, Bonadiman EA, Bruneli GL, Pitol GA, de-Azevedo-Vaz SL. Influence of CBCT filters and contrast adjustments on peri-implant buccal bone thickness measurement and blooming expression. Clin Oral Investig 2024; 28:315. [PMID: 38748313 DOI: 10.1007/s00784-024-05712-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 05/07/2024] [Indexed: 07/03/2024]
Abstract
OBJECTIVES To assess whether filter and contrast adjustments can improve the accuracy of CBCT in measuring the buccal bone thickness (BBT) adjacent to dental implants by reducing blooming artifacts. MATERIALS AND METHODS Homogeneous bone blocks with peri-implant BBT of 0.3 mm, 0.5 mm, and 1 mm were scanned using the Orthophos SL system. Three dentists measured the BBT in 234 CBCT scans under different settings of contrast adjustments and 'Sharpen' filter activation. Additionally, implant diameter measurements were taken to assess blooming artifact expression. The differences between tomographic and actual measurements of BBT and implant diameter [(CBCT - actual) * 100 / actual] were subjected to Mixed ANOVA (α = 0.05). RESULTS The group with the thinnest BBT (0.3 mm) had the greatest difference between tomographic and actual measurements (79.9% ± 29.0%). Conversely, the 0.5 mm (36.1% ± 38.4%) and 1 mm (29.4% ± 12.3%) groups exhibited lower differences (p < 0.05). 'Sharpen' filter activation reduced blooming expression since it resulted in a lower difference for implant diameter (p < 0.05), but it did not influence BBT measurements (p = 0.673). Contrast settings had no impact on BBT (p = 0.054) or implant diameter measurements (p = 0.079). CONCLUSION Although filter activation reduced blooming artifacts, neither filter nor contrast adjustments improved the accuracy of CBCT in measuring peri-implant BBT; actual BBT influenced this task. CLINICAL RELEVANCE When assessing the peri-implant buccal bone plate in the CBCT system studied, dental surgeons may find it beneficial to adjust contrast and apply filters according to their preferences, since such adjustments were found to have no adverse effects on the diagnostic accuracy of this task. The use of the 'Sharpen' filter may lead to improved representation of implant dimensions.
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Affiliation(s)
| | | | | | | | - Sergio Lins de-Azevedo-Vaz
- Dental Sciences Graduate Program, Federal University of Espírito Santo (UFES), Av. Marechal Campos 1468, Maruípe Vitória, ES, 29043900, Brazil.
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2
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Yaghoobi S, Kajan ZD, Khosravifard N, Sigaroudi AK, Jouybari RM. Diagnostic accuracy of cone-beam computed tomography with modified grayscale range for detection of buccal cortical plate defects adjacent to dental implants. Dent Res J (Isfahan) 2023; 20:90. [PMID: 37810449 PMCID: PMC10557990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 02/25/2023] [Accepted: 06/12/2023] [Indexed: 10/10/2023] Open
Abstract
Background This study assessed the diagnostic accuracy of cone-beam computed tomography (CBCT) with a modified grayscale range for the detection of buccal cortical plate defects adjacent to dental implants. Materials and Methods In this in vitro experimental study, titanium implants were inserted in 168 fresh bovine bone blocks with 1-1.5 mm of buccal cortical plate thickness. The blocks were randomly divided into four groups (n = 42). No defect was created in the control blocks. In the three experimental groups, cortical plate defects were randomly created in the cervical, middle, or apical third by a round bur with a 2-mm diameter (n = 42). All blocks underwent CBCT with and without change in the grayscale range. Two observers evaluated all images regarding the presence/absence of defects. Kappa test is used for the agreement of the observers. The diagnostic accuracy of the two modalities was compared by calculating the area under the receiver operating characteristic curve (AUC) (P ≤ 0.05). The sensitivity and specificity values were also compared. Results The AUC was not significantly different between the two modalities with and without altered grayscale range (0.754 vs. 0.762, respectively, P = 0.716). The diagnostic sensitivity of CBCT with and without change in the grayscale range was 51% and 52%, respectively, with a specificity of 100% for both. The diagnostic accuracy of CBCT with and without altered grayscale range had no significant difference for apical and middle third defects (P > 0.05) and was significantly higher than that for the cervical third defects (P < 0.05). Conclusion Changing the grayscale range does not improve the diagnostic accuracy of CBCT for the detection of buccal cortical plate defects adjacent to dental implants.
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Affiliation(s)
- Soophia Yaghoobi
- Department of Maxillofacial Radiology, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Zahra Dalili Kajan
- Department of Maxillofacial Radiology, Dental Sciences Research Center, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Negar Khosravifard
- Department of Maxillofacial Radiology, Dental Sciences Research Center, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Ali Khalighi Sigaroudi
- Department of Maxillofacial Surgery, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
| | - Reza Modanlou Jouybari
- Department of Maxillofacial Surgery, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
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3
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Nomier AS, Gaweesh YSED, Taalab MR, El Sadat SA. Efficacy of low-dose cone beam computed tomography and metal artifact reduction tool for assessment of peri-implant bone defects: an in vitro study. BMC Oral Health 2022; 22:615. [PMID: 36528573 PMCID: PMC9759909 DOI: 10.1186/s12903-022-02663-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Early accurate radiographic assessment of peri-implant bone condition is highly important to avoid excessive loss of supporting bone and implant failure. Cone beam computed tomography (CBCT) is the radiographic technique of choice if peri-implant dehiscence and fenestration defects are suspected. The higher radiation dose and the presence of beam hardening artifacts are the main drawbacks of CBCT imaging techniques. This study aims to evaluate the influence of low-dose cone beam computed tomography (LD-CBCT) and metal artifact reduction (MAR) tool on the assessment of peri-implant dehiscence and fenestration. METHODOLOGY Thirty titanium implants were inserted into bovine rib blocks. Twenty had standardized bone defects (10 with dehiscence and 10 with fenestration), while the remaining 10 were used as control group with no defects. Radiographic examinations held with high-definition CBCT (HD-CBCT) and LD-CBCT with and without application of MAR tool. Images were assessed by four examiners for the presence or absence of peri-implant defects. The area under the area under the receiver operating characteristic (ROC) curve (AUC), sensitivity, specificity, and accuracy were calculated for all radiographic protocols. RESULTS In the absence of MAR tool, there was no difference in AUC and diagnostic values between LD-CBCT and HD-CBCT for detection of both defects. When the MAR tool was applied, the AUC values, sensitivity, and accuracy were higher in HD-CBCT than in LD-CBCT for the detection of both defects, especially for the dehiscence, while specificity remained the same. CONCLUSION LD-CBCT can be used in the evaluation of peri-implant dehiscence and fenestration without any decrease in diagnostic accuracy. The application of MAR tool decrease the diagnostic ability of both defects, especially for the detection of dehiscence defects.
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Affiliation(s)
- Alaa Shafiek Nomier
- grid.7155.60000 0001 2260 6941Department of Oral Medicine, Periodontology, Oral Diagnosis and Oral Radiology, Faculty of Dentistry, Alexandria University, Champolion St. Azarita, Alexandria, 21521 Egypt
| | - Yousria Salah El-Din Gaweesh
- grid.7155.60000 0001 2260 6941Department of Oral Medicine, Periodontology, Oral Diagnosis and Oral Radiology, Faculty of Dentistry, Alexandria University, Champolion St. Azarita, Alexandria, 21521 Egypt
| | - Maha R. Taalab
- grid.7155.60000 0001 2260 6941Department of Oral Medicine, Periodontology, Oral Diagnosis and Oral Radiology, Faculty of Dentistry, Alexandria University, Champolion St. Azarita, Alexandria, 21521 Egypt
| | - Shaimaa Abu El Sadat
- grid.7269.a0000 0004 0621 1570Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ain-Shams University, Cairo, Egypt
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4
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Dhondt R, Quirynen M, Tarce M, Teughels W, Temmerman A, Jacobs R. The accuracy of probing, ultrasound and cone-beam CT scans for determining the buccal bone plate dimensions around oral implants - A systematic review. J Periodontal Res 2022; 57:754-767. [PMID: 35612409 DOI: 10.1111/jre.12998] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 03/29/2022] [Accepted: 04/19/2022] [Indexed: 12/11/2022]
Abstract
OBJECTIVE The objective of this review was to assess the accuracy of available means of determining the BBT (buccal bone thickness) and/or BBL (buccal bone level). This was translated into the following research question: What is the accuracy of the available means of visualizing the BBP (buccal bone plate) to establish the BBT and/or the BBL, when compared to control measurements? As control measurements histomorphometric measurements, direct measurements and cone-beam computed tomography (CBCT) measurements in the absence of metal are accepted. BACKGROUND DATA METHODS: The literary search was performed by searching the databases of MEDLINE, Embase, and Web of Science, up to July 13, 2021. Types of studies included were clinical, in vitro and animal trials, specifically looking into the bone level and/or bone thickness of the buccal bone plate at oral implants. Reference lists were hand searched for relevant articles. Two reviewers performed the data extraction and analysis. Only studies using reliable control measurements to evaluate the accuracy of the tested means of visualizing BBT and/or BBL were included for analysis. The QUADAS-2 tool was used to perform bias analysis on the relevant studies. Extracted data was tabulated to show the differences between test and control measurements for BBT and BBL. For in vitro studies on CBCT measurements of BBT meta-analysis could be performed. RESULTS A total of 1176 papers were identified in the search. Twenty-two articles were used for data extraction and qualitative analysis. Of these studies nine were animal studies, 9 were in vitro studies and four were human studies. Six animal studies and three human studies provided data on probing. CBCT and sonography as techniques for visualizing the buccal bone plate. Probing at implant sites seems to provide data that correlates with a consistent distance from the BBP. Meta-analysis for probing studies could not be performed due to heterogeneity in the setups of these studies. Eleven studies on CBCT were eligible for inclusion. Of these three were animal studies, the remaining 8 studies were all in vitro studies. Meta-analysis was performed on the accuracy of CBCT for in vitro studies, finding a significant underestimation of the BBT when compared to control measurements by a mean difference of -0.15 mm with 95%CI [-0.26,-0.03]. Three studies were identified on measurement of BBT and/or BBL by sonography. This included one human study and two in vitro studies. The identified studies show a low error when determining the buccal bone level or thickness using sonography. All included studies possess a high risk of bias according to risk of bias analysis, mostly due to selection of the patient. CONCLUSION A strong limitation of this systematic review is the inclusion of different studies with heterogeneous designs. Within the limits of this analysis it cannot be concluded that probing is an accurate way of visualizing the BBP. CBCT cannot yet be recommended as a standard diagnostic tool for follow-up of the BBP at oral implants. The application of sonography as a diagnostic tool to visualize the BBP needs further scientific validation.
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Affiliation(s)
- Rutger Dhondt
- Katholieke Universiteit Leuven Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| | - Marc Quirynen
- Katholieke Universiteit Leuven Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| | - Mihai Tarce
- Katholieke Universiteit Leuven Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| | - Wim Teughels
- Katholieke Universiteit Leuven Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| | - Andy Temmerman
- Katholieke Universiteit Leuven Universitaire Ziekenhuizen Leuven, Leuven, Belgium
| | - Reinhilde Jacobs
- Katholieke Universiteit Leuven Universitaire Ziekenhuizen Leuven, Leuven, Belgium
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Bruckmann C, Bruckmann L, Gahleitner A, Stavropoulos A, Bertl K. Pneumocephalus as result of nonsurgical peri-implantitis treatment with an air-polishing device for submucosal debridement-A case report. Clin Exp Dent Res 2022; 8:632-639. [PMID: 35502527 PMCID: PMC9209792 DOI: 10.1002/cre2.578] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/01/2022] [Indexed: 12/02/2022] Open
Abstract
Background A subcutaneous emphysema is an infrequent but potentially life‐threatening complication after dental treatment involving instruments functioning with pressurized air. Emphysemata after the use of high‐speed handpieces and air‐syringes are well documented, however, more recently several reports on emphysemata produced by air‐polishing devices during management of peri‐implant biological complications have appeared. To the best of our knowledge, direct development of pneumocephalus after a dental procedure has never been reported before. Introduction of air likely contaminated with oral bacteria to the intracranial space bares the risk of developing meningitis. Case Presentation This case report describes the spreading of a subcutaneous emphysema into the intracranial space (i.e., development of a pneumocephalus) after treatment of a peri‐implantitis lesion with an air‐polishing device equipped with the nozzle for submucosal debridement. A subcutaneous emphysema was noticed during the use of an air‐polishing device and the subsequent computed tomography (CT) examination revealed a quite unexpected spreading of the emphysema into the intracranial space. The patient was admitted to the hospital for close surveillance, CT follow‐up, and intravenous antibiotics to prevent the development of meningitis due to the introduction of air—likely contaminated with oral bacteria—into the intracranial space. After 3 days, the patient was discharged in good condition without any further complications. Conclusion In case of an extensive subcutaneous emphysema as result of a dental procedure, a more extended radiographic examination including the mediastinal and cranial space should be considered, to assess the risk for potentially life‐threatening complications.
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Affiliation(s)
- Corinna Bruckmann
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Austria
| | - Lukas Bruckmann
- Neurosurgical Department, Klinik Landstrasse, Vienna, Austria
| | - André Gahleitner
- Department of Biomedical Imaging and Image-Guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Andreas Stavropoulos
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Austria.,Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden
| | - Kristina Bertl
- Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
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6
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Saleh MHA, Couso-Queiruga E, Ravidà A, Dukka H, Paiva De Andrade N, Ou A, Ou HL, Wang A. Impact of the periodontal phenotype in premolar and molar sites on bone loss following full thickness mucoperiosteal flap. A 1-year prospective clinical trial. J Periodontol 2022; 93:966-976. [PMID: 35137413 DOI: 10.1002/jper.21-0591] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 12/09/2021] [Accepted: 01/18/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND Full thickness mucoperiosteal flap (FTF) elevation could potentially affect the periodontium of the involved teeth; it is not clear if the periodontal phenotype of teeth involved in a FTF may influence these changes. The aim of this study was to evaluate the impact of FTF on teeth periodontium, as well as assessing the impact of periodontal phenotype on bone remodeling. METHODS In this single arm prospective clinical trial, 26 subjects and a total of 52 adjacent teeth were included. Patients receiving implant surgery in the posterior area, at the time of implant site preparation, an FTF was extended one tooth mesial and distal to the planned site, and the flap was elevated both facially and lingually. Vertical and horizontal bone linear changes were measured on both adjacent teeth, using superimposed cone-beam computerized tomography (CBCT) images taken prior to implant placement (T0) and at 12 months (T1). Baseline digital scans of models and DICOM files were superimposed to assess the periodontal phenotype. RESULTS Vertical bone changes from T0 to T1 were statistically significant (p = 0.013), with changes were significantly higher at the mesial (-0.31± 0.30 mm) and facial (p<0.05) sites. Horizontal dimensional changes 5 mm subcrestally were similar among different locations (p = 0.086) and the bone width loss was higher closest to the crest (p = 0.001). No correlation was found between soft tissue thickness and bone changes. However, bone thickness at baseline appears to influence the extent of horizontal bone remodeling. Overall, the magnitude of bone loss either vertically or horizontally was clinically insignificant (≤0.4 mm). CONCLUSION(S) Marginal bone changes in maxillary and mandibular posterior teeth following FTF at 12 months are very minimal, and mainly influenced by bone rather than soft tissue thickness. Overall, FTF does not seem to have deleterious effects on adjacent teeth periodontium. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Muhammad H A Saleh
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA.,Department of Periodontics, University of Louisville School of Dentistry, Louisville, KY
| | - Emilio Couso-Queiruga
- Department of Periodontics, University of Iowa College of Dentistry, Iowa City, IA, USA
| | - Andrea Ravidà
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Himabindu Dukka
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Nathalia Paiva De Andrade
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Alice Ou
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Hom-Lay Ou
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
| | - Alice Wang
- Department of Periodontics and Oral Medicine, University of Michigan School of Dentistry, Ann Arbor, MI, USA
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Pons R, Carreño M, Amerio E, Gargallo-Albiol J, Nart J, Monje A. Hard tissue dimensional changes following implant removal due to peri-implantitis: A retrospective study. Clin Implant Dent Relat Res 2021; 23:432-443. [PMID: 33949080 DOI: 10.1111/cid.13004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/26/2021] [Accepted: 04/12/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND The current evidence regarding the alterations experienced by the alveolar ridge (hard tissue changes) after implant removal due to peri-implantitis is limited. PURPOSE To assess the hard tissue dimensional changes following implant removal due to peri-implantitis. MATERIAL AND METHODS Clinical records were examined to identify patients with implants that had to be removed due to a hopeless prognosis secondary to peri-implantitis due to expendability of peri-implantitis implants for functional reasons. Patients with preoperative and postoperative cone-beam computed tomography (CBCT) scans were included. Patient-related, implant-related, and surgery-related factors were assessed based on the clinical records. Linear measurements were made to evaluate the influence of bone plate thickness (BPT), ridge width (RW), and ridge height (RH) at various levels upon the outcome of implant removal. A descriptive statistical analysis of the quantitative and qualitative variables was performed. Correlations of the variables with the primary outcome (dimensional changes) were tested using univariate and multivariate analyses (multinomial random intercept mixed model linear regressions). RESULTS A total of 26 patients (nimplants = 79) met the eligibility criteria. The mean decrease in RW at 1 and 3 mm below the crest was 11.3% and 4.4%, respectively (P < 0.001). Buccal and lingual RH was significantly reduced by 2.2% and 6.3%, respectively (P < 0.001). Few patient-related, implant-related, and surgery-related factors appeared to have an impact upon the hard tissue dimensional changes. Bone regeneration simultaneous to implant removal minimized the dimensional changes of the ridge both vertically (5% lesser buccal RH reduction) and horizontally (12% lesser RW reduction) when compared with spontaneous healing. The use of a reverse-torque removal kit seemed to be critical in limiting the dimensional changes of the ridge. CONCLUSIONS Minimal hard tissue changes can be expected following implant removal due to peri-implantitis. Simultaneous bone regeneration procedures and the use of a removal kit may considerably reduce the impact upon the dimensional changes (NCT04534361).
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Affiliation(s)
- Ramón Pons
- Department of Periodontology, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Miguel Carreño
- Department of Periodontology, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Ettore Amerio
- Department of Periodontology, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Jordi Gargallo-Albiol
- Department of Oral and Maxillofacial Surgery, Universitat Internacional de Catalunya, Barcelona, Spain.,Department of Periodontology, School of Dental Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - José Nart
- Department of Periodontology, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Alberto Monje
- Department of Periodontology, Universitat Internacional de Catalunya, Barcelona, Spain.,Department of Periodontology, School of Dental Medicine, University of Michigan, Ann Arbor, Michigan, USA
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Wehner C, Bertl K, Durstberger G, Arnhart C, Rausch-Fan X, Stavropoulos A. Characteristics and frequency distribution of bone defect configurations in peri-implantitis lesions-A series of 193 cases. Clin Implant Dent Relat Res 2020; 23:178-188. [PMID: 33174377 PMCID: PMC8246974 DOI: 10.1111/cid.12961] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/16/2020] [Accepted: 10/05/2020] [Indexed: 12/27/2022]
Abstract
Background Knowledge on peri‐implantitis bone defect characteristics and predictors is still limited. Purpose To describe peri‐implantitis bone defect characteristics and identify possible predictors. Methods Various parameters at patient‐ (age, gender, smoking, and supra‐structure), implant‐ (surface, type, connection, platform, and misfit), and site level (region, alveolar ridge position, defect characteristics, neighboring structure) were recorded retrospectively. Results Among 193 implants, the most prevalent defects were class Ic (25.4%), and Id (23.8%); a previously non‐described category “class Id with only one bone wall” was frequently observed (11.9%). Mean intrabony defect depth and width ranged from 4.5 to 6.2 mm and from 2.7 to 2.9 mm, respectively; mean dehiscence extent ranged from 2.8 to 7.0 mm. A total of 37.8% of the defects presented horizontal bone loss and an intrabony component; in 52.7% of the implants, total defect extent was >6 mm. Jaw region, implant position within the alveolar ridge, and implant/abutment misfit showed significant associations either to defect configuration and/or defect extent. Conclusion (a) Most common peri‐implantitis defects exhibited a combination of intrabony component and a buccal/oral dehiscence, while purely circumferential defects were relatively seldom; (b) implants with defects with bone dehiscence were placed more frequently closer to the lateral aspect of the ridge harboring the dehiscence; (c) implants placed in the lower anterior region had the highest risk for more severe peri‐implant bone loss; and (d) peri‐implant bone defects with only a single bone wall appropriate for regenerative procedure were relatively frequent.
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Affiliation(s)
- Christian Wehner
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Kristina Bertl
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Gerlinde Durstberger
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Christoph Arnhart
- Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Xiaohui Rausch-Fan
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Andreas Stavropoulos
- Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Regenerative Dental Medicine and Periodontology, University Clinics of Dental Medicine (CUMD), University of Geneva, Geneva, Switzerland
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9
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Domic D, Bertl K, Ahmad S, Schropp L, Hellén-Halme K, Stavropoulos A. Accuracy of cone-beam computed tomography is limited at implant sites with a thin buccal bone: A laboratory study. J Periodontol 2020; 92:592-601. [PMID: 32846005 PMCID: PMC8247288 DOI: 10.1002/jper.20-0222] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 02/06/2023]
Abstract
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 three BBT groups (i.e., >0.5 to 1.0; >1.0 to 1.5; >1.5 to 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 with 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, that is, 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.
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Affiliation(s)
- Danijel Domic
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Kristina Bertl
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Oral Surgery, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria
| | - Salman Ahmad
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden
| | - Lars Schropp
- Section of Oral Radiology, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Kristina Hellén-Halme
- Department of Oral and Maxillofacial Radiology, Faculty of Odontology, University of Malmö, Malmö, Sweden
| | - Andreas Stavropoulos
- Department of Periodontology, Faculty of Odontology, University of Malmö, Malmö, Sweden.,Division of Conservative Dentistry and Periodontology, University Clinic of Dentistry, Medical University of Vienna, Vienna, Austria.,Division of Regenerative Dentistry and Periodontology, University Clinics of Dental Medicine (CUMD), University of Geneva, Geneva, Switzerland
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