Author:

Keywords:

Science & Technology, Life Sciences & Biomedicine, Technology, Dentistry, Oral Surgery & Medicine, Engineering, Biomedical, Engineering, digital models, implantology, trueness, SURGICAL IMPLANT DENTISTRY, CONVENTIONAL IMPRESSIONS, FIXED PROSTHODONTICS, TECHNOLOGY APPLICATIONS, ACCURACY, REGISTRATION, RELIABILITY, RECONSTRUCTIONS, PRECISION, TEETH, Cone-Beam Computed Tomography, Humans, Imaging, Three-Dimensional, Mandible, Digital models, Trueness, 0903 Biomedical Engineering, 1105 Dentistry, Dentistry, 3202 Clinical sciences, 3203 Dentistry, 4003 Biomedical engineering

Abstract:

OBJECTIVES: To compare the trueness of 3D digital models derived from CBCT and IOS and to evaluate their accuracy for implementation in oral implant rehabilitation. MATERIALS AND METHODS: A dry human mandible with a full set of intact teeth was included in the study. The mandible was scanned using Trios IOS and four different CBCT machines with various protocols for generation of 3D digital models. A µCT was utilized to scan each tooth individually. Following registration and segmentation, the trueness evaluation of 3D digital models was carried out by part comparison analysis and color-coded mapping of the superimposed teeth surfaces. RESULTS: The four CBCT-derived 3D digital models with different protocols had better trueness than Trios IOS. NewTom VGi evo (110 KV), ProMax 3D (90 kV), 3D Accuitomo 170 (90 kV), Green 21 (110 kV), and Green 21 (90 kV) showed significantly better trueness than IOS. However, 3D Accuitomo 170 and ProMax 3D CBCT devices with 70 kV protocol showed better trueness without any significant difference with IOS. CONCLUSION: CBCT-derived 3D digital models showed better trueness when compared with IOS. When CBCT data are available for preoperative planning for oral implant rehabilitation, it may preclude the need for IOS for obtaining 3D study models.