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Accuracy of linear measurements around dental implants by means of cone beam computed tomography with different exposure parameters.

ABSTRACT: The aim of this study was to determine the accuracy of linear measurements around dental implants when using CBCT unit devices presenting different exposure parameters.Dental implants (n?=?18) were installed in the maxilla of human dry skulls, and images were obtained using two CBCT devices: G1-Care Stream 9300 (70?kVp, 6.3?mA, voxel size 0.18?mm, field of view 8?×?8?cm; Carestream Health, Rochester, NY) and G2-R100 Veraview® (75?kVp, 7.0?mA, voxel size 0.125?mm, field of view 8?×?8?cm; J Morita, Irvine, CA). Measurements of bone thickness were performed at three points located (A) in the most apical portion of the implant, (B) 5?mm above the apical point and (C) in the implant platform. Afterwards, values were compared with real measurements obtained by an optical microscopy [control group (CG)]. Data were statistically analyzed with the significance level of p???0.05.There was no statistical difference for the mean values of bone thickness on Point A (CG: 4.85?±?2.25?mm, G1: 4.19?±?1.68?mm, G2: 4.15?±?1.75?mm), Point B (CG: 1.50?±?0.84?mm, G1: 1.61?±?1.27?mm; G2: 1.68?±?0.82?mm) and Point C (CG: 1.78?±?1.33?mm, G1: 1.80?±?1.09?mm; G2: 1.64?±?1.11?mm). G1 and G2 differed in bone thickness by approximately 0.76?mm for Point A, 0.36?mm for Point B and 0.08?mm for Point C. A lower intraclass variability was identified for CG (Point A?=?0.20?±?0.25; Point B?=?0.15?±?0.20; Point C?=?0.06?±?0.05?mm) in comparison with G1 (Point A?=?0.56?±?0.52; Point B?=?0.48?±?0.50; Point C?=?0.47?±?0.56?mm) and G2 (Point A?=?0.57?±?0.51; Point B?=?0.46?±?0.46; Point C?=?0.36?±?0.31?mm).CBCT devices showed acceptable accuracy for linear measurements around dental implants, despite the exposure parameters used.

SUBMITTER: Bohner LOL

PROVIDER: S-EPMC5595033 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature

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Accuracy of linear measurements around dental implants by means of cone beam computed tomography with different exposure parameters.

Bohner Lauren O L LOL Tortamano Pedro P Marotti Juliana J

Dento maxillo facial radiology 20170323 5

<h4>Objectives</h4>The aim of this study was to determine the accuracy of linear measurements around dental implants when using CBCT unit devices presenting different exposure parameters.<h4>Methods</h4>Dental implants (n = 18) were installed in the maxilla of human dry skulls, and images were obtained using two CBCT devices: G1-Care Stream 9300 (70 kVp, 6.3 mA, voxel size 0.18 mm, field of view 8 × 8 cm; Carestream Health, Rochester, NY) and G2-R100 Veraview<sup>®</sup> (75 kVp, 7.0 mA, voxel s ...[more]

PMID: 28267928

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Project description:Domestic rabbits are increasing in popularity as household pets; therefore, veterinarians need to be familiar with the most common diseases afflicting rabbits including dental disease. Current diagnostic approaches include gross oral examination, endoscopic oral examination, skull radiography, and computed tomography (CT). Cone beam computed tomography (CBCT), a new oral and maxillofacial imaging modality that has the capability to produce high-resolution images, has not yet been described for use in evaluating dental disease in rabbits. A total of 15 client-owned rabbits had CBCT, oral examination, dental charting, and dental treatment performed under general anesthesia. Images were evaluated using transverse and custom multiplanar (MPR), 3D, and panoramic reconstructed images. The CBCT findings were grouped into abnormalities that could be detected on conscious oral examination vs. abnormalities that could not be detected by conscious oral examination. Potential associations between the two categories were examined by pairwise Fisher's exact test with statistical significance determined by P?<?0.05. The most common findings identified on CBCT images were periodontal ligament space widening (14/15), premolar and molar malocclusion (13/15), apical elongation (13/15), coronal elongation (12/15), inflammatory tooth resorption (12/15), periapical lucency (11/15), moth-eaten pattern of osteolysis of the alveolar bone (9/15), ventral mandibular border contour changes (9/15), and missing teeth (8/15). Of the CBCT abnormalities likely to be observed on oral examination, coronal elongation (detectable on oral examination) was significantly associated with apical elongation (P?=?0.029). There were no other significant associations between CBCT findings that are also clinically detectable and CBCT findings that are not be detectable on oral examination. This suggests that pathology often exists that is not apparent upon oral examination. This study establishes the common CBCT findings associated with dental disease in rabbits and demonstrates the feasibility of this technology to diagnose and plan treatment in dental disorders in this species.

Dataset Information

Accuracy of linear measurements around dental implants by means of cone beam computed tomography with different exposure parameters.

Publications

Accuracy of linear measurements around dental implants by means of cone beam computed tomography with different exposure parameters.

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