Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Oral and maxillofacial radiologyEfficacy of a cone beam computed tomography metal artifact reduction algorithm for the detection of peri-implant fenestrations and dehiscences
Section snippets
Materials and Methods
The Research Ethics Committee of Piracicaba Dental School, State University of Campinas (protocol 084/2011), approved this study without restrictions.
Fresh, soft tissue–free bovine ribs were used to simulate alveolar bone, as previously reported.7, 8 Before implant placement, the bone defects were created with a spherical bur (3017 HL; KG Sorensen, São Paulo, SP, Brazil). Defects were 2.5 mm in diameter, with an elliptical (fenestrations) or half-elliptical (dehiscences) shape. Dehiscences were
Results
Means and standard deviations for the kappa test are shown in Table I. Intraobserver agreement ranged from moderate to good, and interobserver agreement ranged from moderate to excellent.
The Az values for diagnosis of fenestrations and dehiscences are shown in Table II. Values were higher for fenestrations than for dehiscences, and neither the use of MAR nor the decrease in voxel size led to superior diagnostic accuracy for either defect type (P = .957 for fenestrations; P = .253 for
Discussion
When high-density structures, such as dental implants, are present in CBCT scans, beam hardening and scattering artifacts can affect image quality and impair the diagnosis of conditions such as radicular fractures or peri-implant fenestrations and dehiscences.4, 11, 12, 13, 14, 15 Peri-implant defects, such as fenestrations and dehiscences, may compromise implantation success.1 Thus, once these defects are suspected, patients may benefit from CBCT imaging, since it is an excellent aid to
Conclusions
The MAR algorithm tested did not improve the diagnosis of peri-implant fenestrations and dehiscences when either the 0.2-mm or the 0.3-mm voxel size was used.
References (41)
- et al.
Accuracy and reliability of cone-beam computed tomography for measuring alveolar bone height and detecting bony dehiscences and fenestrations
Am J Orthod Dentofacial Orthop
(2010) - et al.
Metal artifact reduction in cone beam computed tomography using forward projected reconstruction information
Z Med Phys
(2011) - et al.
Detection of periimplant fenestration and dehiscence with the use of two scan modes and the smallest voxel sizes of a cone-beam computed tomography device
Oral Surg Oral Med Oral Pathol Oral Radiol
(2013) - et al.
Number of basis images effect on detection of root fractures in endodontically treated teeth using a cone beam computed tomography machine: an in vitro study
Oral Surg Oral Med Oral Pathol Oral Radiol
(2013) - et al.
Effect of bone thickness on alveolar bone-height measurements from cone beam computed tomography images
Am J Orthod Dentofacial Orthop
(2011) - et al.
Influence of voxel size in the diagnostic ability of cone beam tomography to evaluate simulated external root resorption
J Endod
(2009) - et al.
Occlusal caries detection by using a cone-beam CT with different voxel resolutions and a digital intraoral sensor
Oral Surg Oral Med Oral Pathol Oral Radiol Endod
(2010) - et al.
Diagnostic ability of a cone-beam computed tomography scan to assess longitudinal root fractures in prosthetically treated teeth
J Endod
(2010) - et al.
Implant success, survival, and failure: the International Congress of Oral Implantologists (ICOI) Pisa Consensus Conference
Implant Dent
(2008) - et al.
Long-term results and survival rate of implants treated with guided bone regeneration: a 5-year case series prospective study
Clin Oral Impl Res
(2005)
Cone beam CT scans with and without artefact reduction in root fracture detection of endodontically treated teeth
Dentomaxillofac Radiol
Artefacts in CBCT: a review
Dentomaxillofac Radiol
Accuracy of measuring the cortical bone thickness adjacent to dental implants using cone beam computed tomography
Clin Oral Impl Res
The measurement of observer agreement for categorical data
Biometrics
Artifacts in CT: recognition and avoidance
Radiographies
Common orthodontic appliances cause artifacts that degrade the diagnostic quality of CBCT images
J Calif Dent Assoc
Beam hardening artefacts occur in dental implant scans with the NewTom® cone beam CT but not with the dental 4-row multidetector CT
Dentomaxillofc Radiol
A fully 3 D approach for metal artifact reduction in computed tomography
Med Phys
Assessment of buccal marginal alveolar peri-implant and periodontal defects using a cone beam CT system with and without the application of metal artefact reduction mode
Dentomaxillofac Radiol
Cited by (0)
Part of the results of this study were previously presented as posters at the 31st SBPqO Annual Meeting (2014) and at the 20th International Congress of Dento-Maxilo-Facial Radiology (2015). An abstract was published in the 28th volume of the journal Brazilian Oral Research (page 374).