Long-Term Study of Relapse After Mandibular Orthognathic Surgery: Advancement Versus Setback.
J Maxillofac Oral Surg
; 21(2): 469-480, 2022 Jun.
Article
em En
| MEDLINE
| ID: mdl-35712437
ABSTRACT
Background:
Relapse is a continuing process and should be evaluated on a long rather than short term. Materials andMethods:
Treatment records of 46 patients who underwent mandibular orthognathic surgery were divided into two groups, i.e. Group 1 Mandibular Advancement (MA) surgery (n = 26) and Group 2 Mandibular Setback (MS) surgery (n = 20). Lateral cephalograms were traced at T0 (01 week before surgery), T1 (01 week after surgery), T2 (01 year after surgery) and T3 (minimum 05 years after surgery) to study short- and long-term skeletal and dental relapse in horizontal, vertical and angular parameters selected for the study. Relapse was correlated with gender, age, amount of surgical movement and intra-operative change in mandibular plane angle to study effect of these factors on relapse.Results:
All horizontal, vertical and angular parameters studied showed significant relapse at short term (from T1 to T2) which continued significantly till long-term evaluation (T2 to T3) in both groups (P value < 0.001). Horizontal relapse in all parameters, vertical relapse in all parameters (except Pog and overbite at T1-T2) and angular relapse in all parameters (except Ramus inclination at T1-T2) was significantly higher in Group 2 compared to Group 1 (P value < 0.001 for all). Relapse showed significant and positive correlation with amount of surgical movement and intra-operative change in mandibular plane angle in both groups (P value < 0.05 for all).Conclusion:
Both MA and MS surgeries show significant relapse on both short- and long-term evaluation which it is higher in MS as compared to MA surgeries.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Maxillofac Oral Surg
Ano de publicação:
2022
Tipo de documento:
Article