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Accuracy of miniscrew surgical guides assessed from cone-beam computed tomography and digital models

 Mi-Ju Bae  ;  Ji-Young Kim  ;  Jong-Tae Park  ;  Jung-Yul Cha  ;  Hee-Jin Kim  ;  Hyung-Seog Yu  ;  Chung-Ju Hwang 
 American Journal of Orthodontics and Dentofacial Orthopedics, Vol.143(6) : 893-901, 2013 
Journal Title
 American Journal of Orthodontics and Dentofacial Orthopedics 
Issue Date
INTRODUCTION: Several methods are available to enhance the precision of miniscrew placement. The use of surgical guides based on cone-beam computed tomography is indicated especially in patients with risky or difficult anatomic situations. The purpose of this study was to evaluate the accuracy of miniscrew placement by using surgical guides developed with computer-aided design and manufacturing techniques. METHODS: Miniscrews were placed in cadaver maxillae using stereolithographic computer-aided design and manufacturing techniques with assistance from surgical guides (surgical guide group, n = 25) or periapical x-rays (control group, n = 20). Insertion sites were selected using a 3-dimensional surgical planning program by fusing maxillary digital model images and cone-beam computed tomography images. Deviations between actual and planned placements were measured as 3-dimensional angular deviations and distance (coronal and apical) deviations. RESULTS: In the surgical guide group, the angular deviation was a median of 3.14° (range, 1.02°-10.9°), and the mesiodistal deviations in the coronal and apical areas were medians of 0.29 mm (range, 0.03-0.73 mm) and 0.21 mm (range, 0.03-0.97 mm), respectively. The deviations differed significantly between operators in the control group, but not in the surgical guide group. In the surgical guide group, there was no root damage from miniscrew placement, and 84% of the miniscrews were placed without contacting adjacent anatomic structures. In the control group, 50% of the miniscrews were placed between the roots (P <0.05). CONCLUSIONS: Surgical guide accuracy was improved when digital model imaging was used. Miniscrews were placed more accurately when using surgical guides than when using a direct method.
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5. Research Institutes (연구소) > Human Identification Research Center (개인식별연구소) > 1. Journal Papers
5. Research Institutes (연구소) > Oral Science Research Center (구강과학연구소) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
김지영(Kim, Ji Young)
김희진(Kim, Hee Jin) ORCID logo https://orcid.org/0000-0002-1139-6261
박종태(Park, Jong Tae)
유형석(Yu, Hyung Seog) ORCID logo https://orcid.org/0000-0002-1275-5078
차정열(Cha, Jung Yul)
황충주(Hwang, Chung Ju) ORCID logo https://orcid.org/0000-0003-3024-4551
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