대한치과교정학회지 (The korean journal of orthodontics)

  • 제54권4호
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  • Pages.257-263
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  • 2024
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  • 2234-7518(pISSN)
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  • 2005-372X(eISSN)
대한치과교정학회 (The Korean Association Of Orthodontists)
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Accuracy of lingual fixed retainers fabricated using a CAD/CAM bending machine

  • Fu Ping Cui (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Jung-Jin Park (Department of Orthodontics, School of Dentistry, Kyung Hee University) ;
  • Seong-Hun Kim (Department of Orthodontics, School of Dentistry, Kyung Hee University)
  • 투고 : 2024.04.24
  • 심사 : 2024.07.11
  • 발행 : 2024.07.25
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초록

Objective: Lingual fixed retainers, made from 0.0175-inch 3-strand twisted stainless steel wire (TW) and 0.016 × 0.022-inch straight rectangular wire (RW), are generally used in clinical practice. This study aimed to calculate their accuracy by comparing the discrepancy between computer-aided customized retainers made from these two types of wires. Methods: Eleven orthodontic patients were selected, resulting in 22 maxillary and mandibular three-dimensional printing dental models. Two types of lingual fixed retainers were bonded from canine to canine. To determine the accuracy, five points were chosen for each model, resulting in 110 selected points. The absolute values of the distances on the x-, y-, and z-axes were measured to compare the accuracy of the two types of computer-aided retainers. Results: The accuracy of the two types of retainers did not differ significantly in the x- and z-axes, but only in the y-axis (P < 0.01), where RW-fixed retainers exhibited a slightly but significantly increased distance compared to the TW. Conclusions: Both types of retainers showed high accuracy; however, RW had a slight but statistically significant difference along the y-axis compared with TW. This type of computer-aided design/computer-aided manufacturing bending machine is limited to two dimensions, and the dental arch is curved. Therefore, RW may require slight manual adjustment by the practitioner after manufacturing.

키워드

과제정보

This article is partly from the MSD Thesis of FPC. The authors especially appreciate Mr. Eric Jung, CEO of YOAT Corp., Lynnwood, WA, USA, for supporting the article preparation.

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