Accuracy of a non-contact 3D measuring system for dental model analysis |
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| Authors: | Yasutaka Kaihara Takuya Kihara Asami Kakayama Hideaki Amano Hiroki Nikawa Katsuyuki Kozai |
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| Affiliation: | 1. Department of Pediatric Dentistry, Hiroshima University Hospital, 2-3 Kasumi 1-chome, Minami-ku, Hiroshima 734-8553, Japan;2. Department of Oral Biology & Engineering, Division of Oral Health Sciences, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima 734-8553, Japan;3. Department of Maxillofacial Functional Development, Division of Oral Health Sciences, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima 734-8553, Japan;4. Department of Pediatric Dentistry, Integrated Health Sciences, Hiroshima University Graduate School of Biomedical Sciences, Hiroshima 734-8553, Japan;1. Department of Semiology and Clinic, Faculty of Dentistry, Federal University of Pelotas, Gonçalves Chaves St. 457, Pelotas, RS, CEP 96015-560, Brazil;2. Faculty of Dentistry, Federal University of Pelotas, Pelotas, RS, Brazil;1. Area on Community Healthcare, National Institute of Public Health, 2-3-6 Minami, Wako, Saitama 351-0197, Japan;2. The Nippon Dental University College at Tokyo, 2-3-16 Fujimi, Chiyoda-ku, Tokyo 102-0071, Japan;1. Pediatric Dentistry, Department of Oral Health Sciences, Division of Medical and Dental Sciences, Graduate School, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8549, Japan;2. Maxillofacial Anatomy, Department of Maxillofacial Biology, Division of Maxillofacial/Neck Reconstruction Graduate School, Tokyo Medical and Dental University, Tokyo 113-8549, Japan;1. Ishida Dental Clinic, 28-16 Inarimae, Tsukuba, Ibaraki 305-0061, Japan;2. Osamu Family Dental Clinic, 1-31-2 Kyuuna, Ginowan, Okinawa 901-2222, Japan;3. Department of Pediatric Dentistry, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-nishi, Matsudo, Chiba 271-8587, Japan;1. Department of Pediatric Dentistry, Tokyo Dental College 1-2-2 Masago, Mihama-ku, Chiba 261-8502, JAPAN;2. Division of Pediatric Dentistry, Department of Clinical Oral Health Science, Tokyo Dental College 2-9-18 Misakicho, Chiyoda-ku, Tokyo 101-0061, JAPAN;3. Aoyama Dental Clinic 1-1-7 Shibuya, Shibuya-ku, Tokyo 150-0002, JAPAN |
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| Abstract: | PurposeThis study aimed to assess the accuracy of digital dental models obtained using a new non-contact 3D measuring system compared to direct measurements made on plaster models as the gold standard.MethodsThree examiners independently examined the sizes of various teeth and the intercanine and intermolar arch width on plaster casts and digital models. Each parameter was measured 10 times on each model under uniform conditions. The order of measurements was changed each time.ResultsThe means of the 10 parameters were different between the 2 methods, and the absolute differences ranged between 0.07 and 0.23 mm; some of which were statistically significant (P < 0.05). However, all these differences were less than 0.3 mm, so are not considered clinically significant. The ratios of standard deviation and coefficient of variation were larger than 1 in 7 of 10 parameters, suggesting that the reproducibility of the 3D scanner was slightly less reproducible than the direct measurements, but still clinically acceptable.ConclusionOur non-contact 3D measuring system showed high reliability on repeated measurement of study models, suggesting that the accuracy of model analysis by 3D scanner is equivalent to that of direct measurement of plaster models by digital caliper. |
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| Keywords: | Study model analysis Non-contact 3D laser scanner Accuracy |
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