Home Current issue Ahead of print Search About us Editorial board Archives Submit article Instructions Subscribe Contacts Login 
  • Users Online: 164
  • Home
  • Print this page
  • Email this page
Year : 2022  |  Volume : 14  |  Issue : 1  |  Page : 1-6

Evaluation of chin morphology after two-jaw orthognathic surgery: A retrospective study using stereophotogrammetry

1 Department of Oral and Maxillofacial Surgery and Periodontology, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
2 Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil

Correspondence Address:
João Lisboa de Sousa Filho
Av do Café s/n, Monte Alegre, Faculdade Odontologia De Ribeirão Preto, Universidade De São Paulo, Ribeirão Preto 14040-904, São Paulo
Login to access the Email id

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jorr.jorr_42_21

Rights and Permissions

Background: The mandibular advancement or setback achieved by bilateral sagittal osteotomy can generate significant changes in the soft tissues of the mandible and chin. This was a retrospective study of patients who underwent bimaxillary orthognathic surgery in the Oral and Maxillofacial Surgery Residency Training Program, School of Dentistry of Ribeirão Preto, University of São Paulo. Objective: The aim of this study was to retrospectively evaluate changes in chin morphology in patients with orthognathic surgery of two jaws using Three-dimensional (3D) photography. Based on inclusion and non inclusion criteria, 11 records including 9 women (81.1%) and 2 men (18.9%), with a mean age of 33.5 years, were incorporated in the study. 3D images were analyzed with Vectra M3® software (Canfield Scientific, Fairfield, NJ, USA), after marking reference points on the face, determining linear measurements, and performing area and angle calculations. We analyzed 3D photographs obtained preoperatively (T0), 6 months (T1), and 1 year (T2) after surgery. Results: Chin height (Li-Me) and surface (Li-Me) demonstrated an average increase of 9.2 mm and 8.8 mm, respectively, after 6 months. In addition, chin prominence (Go-Pg), chin-to-neck distance (C-Gn), and lower jaw area increased on average by 12.1 mm, 15.0 mm, and 34.6 mm2, respectively, after 6 months. However, the mentolabial angle (Li-Si-Pg) decreased on average by 18.8° after 6 months. All results remained stable after 12 months. Conclusion: In conclusion, 3D photography was very useful for the evaluation of facial soft-tissue changes after orthognathic surgery. Our study demonstrated a decrease in mentolabial angle and increases in chin prominence, chin height and surface, chin-to-neck distance, and lower jaw area.

Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)

 Article Access Statistics
    PDF Downloaded171    
    Comments [Add]    

Recommend this journal