Consideration of root position in virtual tooth setup for extraction treatment: A comparative study of simulated and actual treatment results
박미리내, Allareddy Veerasathpurush, Atsawasuwan Phimon, 이민경, 이경민,
소속 상세정보
박미리내 ( Park Mirinae ) - Chonnam National University School of Dentistry Department of Orthodontics
( Allareddy Veerasathpurush ) - University of Illinois at Chicago Department of Orthodontics
( Atsawasuwan Phimon ) - University of Illinois at Chicago Department of Orthodontics
이민경 ( Lee Min-Kyeong ) - University of Illinois at Chicago Department of Orthodontics
이경민 ( Lee Kyung-Min Clara ) - Chonnam National University School of Dentistry Department of Orthodontics
Abstract
Objective: The purpose of the present study was to compare the root positions in virtual tooth setups using only crowns in a simulated treatment with those achieved in the actual treatment.
Methods: Pre- and post-treatment intraoral and corresponding cone beam computed tomography (CBCT) scans were obtained from 15 patients who underwent orthodontic treatment with premolar extraction. A conventional virtual tooth setup was used for the treatment simulation. Pre- and post-treatment three-dimensional digital tooth models were fabricated by integrating the patients’ intraoral and CBCT scans. The simulated root positions in the virtual setup were obtained by merging the crown in the virtual setup and root in the pre-treatment tooth model. The root positions of the simulated and actual post-treatment tooth models were compared.
Results: Differences in root positions between the simulated and actual models were > 1 mm in all teeth, and statistically significant differences were observed (p < 0.05), except for the maxillary lateral incisors. The differences in the inter-root angulation were > 1° in all teeth, and statistically significant differences were observed in the maxillary and mandibular canines.
Conclusions: The virtual tooth setup using only crown data showed errors over the clinical limits. The clinical application of a virtual setup using crowns and roots is necessary for accurate and precise treatment simulation, particularly in extraction treatment.
키워드
Digital models; Digital simulation; 3-dimensional diagnosis and treatment planning; Diagnosis and treatment planning
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