TY - JOUR
T1 - A prospective study of soft- and hard-tissue changes after mandibular advancement surgery
T2 - Midline changes in the chin area
AU - Bral, Alexander
AU - Olate, Sergio
AU - Zaror, Carlos
AU - Mensink, Gertjan
AU - Coscia, Giuseppe
AU - Mommaerts, Maurice Y.
N1 - Publisher Copyright:
© 2020 American Association of Orthodontists
PY - 2020/5
Y1 - 2020/5
N2 - Introduction: The purpose of this research was to prospectively determine the ratio of 2 soft-tissue landmarks, pogonion (sPg) and menton (sMe), to their hard-tissue counterparts (Pg and Me) in the sagittal and vertical directions for mandibular lengthening surgeries. Methods: We drew a sample from the prospective Orthognathic and Orthofacial Surgery Research study, consisting of patients who underwent surgical mandibular lengthening (alone or in combination with maxillary osteotomy) without genioplasty. We digitized landmarks using Facewizz software and determined the relationships between the hard- and soft-tissue changes by correlation analysis. Results: Pearson correlation test showed a significant correlation between the type of surgery and the sPg:Pg and sMe:Me ratios. The sPg:Pg ratio was 87% for mandibular lengthening only and 102% for mandibular lengthening in combination with maxillary surgery. The sMe:Me ratio was 85% and 96% for upward and downward movements, respectively. Conclusions: The average ratios presented in this study for the pogonion and menton can aid in preoperative planning by providing estimates for soft-tissue behavior. Further stratifications will be possible after the Orthognathic and Orthofacial Surgery Research database is enriched with more inclusions.
AB - Introduction: The purpose of this research was to prospectively determine the ratio of 2 soft-tissue landmarks, pogonion (sPg) and menton (sMe), to their hard-tissue counterparts (Pg and Me) in the sagittal and vertical directions for mandibular lengthening surgeries. Methods: We drew a sample from the prospective Orthognathic and Orthofacial Surgery Research study, consisting of patients who underwent surgical mandibular lengthening (alone or in combination with maxillary osteotomy) without genioplasty. We digitized landmarks using Facewizz software and determined the relationships between the hard- and soft-tissue changes by correlation analysis. Results: Pearson correlation test showed a significant correlation between the type of surgery and the sPg:Pg and sMe:Me ratios. The sPg:Pg ratio was 87% for mandibular lengthening only and 102% for mandibular lengthening in combination with maxillary surgery. The sMe:Me ratio was 85% and 96% for upward and downward movements, respectively. Conclusions: The average ratios presented in this study for the pogonion and menton can aid in preoperative planning by providing estimates for soft-tissue behavior. Further stratifications will be possible after the Orthognathic and Orthofacial Surgery Research database is enriched with more inclusions.
UR - http://www.scopus.com/inward/record.url?scp=85083696131&partnerID=8YFLogxK
U2 - 10.1016/j.ajodo.2019.05.022
DO - 10.1016/j.ajodo.2019.05.022
M3 - Article
C2 - 32354439
AN - SCOPUS:85083696131
SN - 0889-5406
VL - 157
SP - 662
EP - 667
JO - American Journal of Orthodontics and Dentofacial Orthopedics
JF - American Journal of Orthodontics and Dentofacial Orthopedics
IS - 5
ER -