The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Is three-piece maxillary segmentation surgery a stable procedure?

  • Renata Mayumi Kato (Department of Morphology and Pediatric Clinic, School of Dentistry of Araraquara, Sao Paulo State University) ;
  • Joao Roberto Goncalves (Department of Morphology and Pediatric Clinic, School of Dentistry of Araraquara, Sao Paulo State University) ;
  • Jaqueline Ignacio (Department of Morphology and Pediatric Clinic, School of Dentistry of Araraquara, Sao Paulo State University) ;
  • Larry Wolford (Departments of Oral and Maxillofacial Surgery and Orthodontics, Texas A&M University Health Science Center, Baylor College of Dentistry) ;
  • Patricia Bicalho de Mello (Private Practice) ;
  • Julianna Parizotto (Department of Morphology and Pediatric Clinic, School of Dentistry of Araraquara, Sao Paulo State University) ;
  • Jonas Bianchi (Department of Morphology and Pediatric Clinic, School of Dentistry of Araraquara, Sao Paulo State University)
  • Received : 2023.08.08
  • Accepted : 2024.03.03
  • Published : 2024.03.25
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Abstract

Objective: The number of three-piece maxillary osteotomies has increased over the years; however, the literature remains controversial. The objective of this study was to evaluate the skeletal stability of this surgical modality compared with that of one-piece maxillary osteotomy. Methods: This retrospective cohort study included 39 individuals who underwent Le Fort I maxillary osteotomies and were divided into two groups: group 1 (three pieces, n = 22) and group 2 (one piece, n = 17). Three cone-beam computed tomography scans from each patient (T1, pre-surgical; T2, post-surgical; and T3, follow-up) were used to evaluate the three-dimensional skeletal changes. Results: The differences within groups were statistically significant only for group 1 in terms of surgical changes (T2-T1) with a mean difference in the canine region of 3.09 mm and the posterior region of 3.08 mm. No significant differences in surgical stability were identified between or within the groups. The mean values of the differences between groups were 0.05 mm (posterior region) and -0.39 mm (canine region). Conclusions: Our findings suggest that one- and three-piece maxillary osteotomies result in similar post-surgical skeletal stability.

Keywords

Acknowledgement

FAPESP (Fundacao de Amparo a Pesquisa do Estado de Sao Paulo) for financial support (Processes 2013/05831-8 and 2014/09152-0).

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