Evaluation of digital dental models obtained from dental cone-beam computed tomography scan of alginate impressions
Jiang Tingting, 이상미, Hou Yanan, Chang Xin, 황현식,
소속 상세정보
( Jiang Tingting ) - Chonnam National University School of Dentistry Department of Orthodontics
이상미 ( Lee Sang-Mi ) - Chonnam National University School of Dentistry Department of Orthodontics
( Hou Yanan ) - Chonnam National University School of Dentistry Department of Orthodontics
( Chang Xin ) - Dalian Medical University Department of Orthodontics
황현식 ( Hwang Hyeon-Shik ) - Chonnam National University School of Dentistry Department of Orthodontics
KMID : 0361920160460030129
Abstract
Objective: To investigate the dimensional accuracy of digital dental models obtained from the dental cone-beam computed tomography (CBCT) scan of alginate impressions according to the time elapse when the impressions are stored under ambient conditions.
Methods: Alginate impressions were obtained from 20 adults using 3 different alginate materials, 2 traditional alginate materials (Alginoplast and Cavex Impressional) and 1 extended-pour alginate material (Cavex ColorChange). The impressions were stored under ambient conditions, and scanned by CBCT immediately after the impressions were taken, and then at 1 hour intervals for 6 hours. After reconstructing three-dimensional digital dental models, the models were measured and the data were analyzed to determine dimensional changes according to the elapsed time. The changes within the measurement error were regarded as clinically acceptable in this study.
Results: All measurements showed a decreasing tendency with an increase in the elapsed time after the impressions. Although the extended-pour alginate exhibited a less decreasing tendency than the other 2 materials, there were no statistically significant differences between the materials. Changes above the measurement error occurred between the time points of 3 and 4 hours after the impressions.
Conclusions: The results of this study indicate that digital dental models can be obtained simply from a CBCT scan of alginate impressions without sending them to a remote laboratory. However, when the impressions are not stored under special conditions, they should be scanned immediately, or at least within 2 to 3 hours after the impressions are taken.
키워드
Digital dental model; Alginate impression; Dental cone-beam computed tomography; Dimensional accuracy
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