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A new model of customized maxillary guide for orthognathic surgery: Precision analysis.

Authors
  • Monteiro Carneiro, Nayara Cristina1
  • Oliveira, Douglas Voss2
  • Real, Flávio Henrique3
  • Karla da Silva Tabosa, Ana4
  • Carneiro Júnior, José Thiers5
  • 1 Oral and Maxillofacial Surgery - João de Barros Barreto University Hospital, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil; Msc and PhD Student in Oral and Maxillofacial Surgery - Federal University of Pará, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil. Electronic address: [email protected] , (Brazil)
  • 2 Oral and Maxillofacial Surgery - Brazilian Dental Association, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil; Msc and PhD Student in Oral and Maxillofacial Surgery - Federal University of Pará, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil. Electronic address: [email protected] , (Brazil)
  • 3 Oral and Maxillofacial Surgery - Getúlio Vargas Hospital, Recife, Brazil; Msc in Oral and Maxillofacial Surgery - Federal University of Pará, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil. Electronic address: [email protected] , (Brazil)
  • 4 Oral and Maxillofacial Surgery - Brazilian Dental Association, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil; Master Student in Oral and Maxillofacial Surgery - Federal University of Pará, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil. Electronic address: [email protected] , (Brazil)
  • 5 PhD in Neurosciences and Cell Biology - Federal University of Pará, Augusto Corrêa, 01, Guamá. CEP, 66075-110, Belém, PA, Brazil; Oral and Maxillofacial Surgery, Irmandade da Santa Casa de Misericórdia Hospital, São Paulo, Brazil. Electronic address: [email protected] , (Brazil)
Type
Published Article
Journal
Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery
Publication Date
Nov 01, 2020
Identifiers
DOI: 10.1016/j.jcms.2020.10.007
PMID: 33288374
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

To evaluate the surgical accuracy of a new Maxillary Bone-Dental-Supported guide (MBDS) for osteotomy and maxillary positioning in orthognathic surgeries. The customized MBDS were prototyped through CAD-CAM technology (computer-aided design and manufacturing). The planning image (CT0) was superimposed on the computed tomography scan post-treatment (CT1) and the mean of positional differences between them were obtained tridimensionally at the axes: mediolateral (X), anteroposterior (Y) and vertical (Z). Eleven patients were selected according to the inclusion and exclusion criteria. The mediolateral movement showed the best precision, with a greater mean difference of 0.34 mm at the CI point (central incisor) and less than 0.02 mm at the RM point (right molar). In the vertical direction, the largest mean discrepancy found was 0.50 mm and on the y-axis, anteroposterior, was 0.74 mm, as well as two at the CI point. The skeletal SNA point, on the other hand, showed the smallest average discrepancies: 0.10 mm (x-axis), 0.03 mm (y-axis) and 0 mm (z-axis). Overall, 99.24% of the discrepancies found were less than 2 mm. Our results suggests that the double support, osseous and dental, present in that new guide, favored the positional stability of the maxilla and promoted better control of its vertical axis. Furthermore, the function of an osteotomy guide increases the predictability and security of the surgical procedure. Copyright © 2020. Published by Elsevier Ltd.

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