Influence of orthognathic surgery for symptoms of temporomandibular dysfunction.
OBJECTIVE
To evaluate the influence of orthognathic surgery on the clinical signs and symptoms of temporomandibular disorders (TMDs).


METHODS
In a cohort study, 54 patients undergoing orthognathic surgery were evaluated with regard to the signs and symptoms of TMDs through subjective and objective assessments. These evaluations were performed 1 week preoperatively (T1), 1 month postoperatively (T2), and 6 months postoperatively (T3). The evaluations included patient variables and surgery. Univariate analyzes were performed to verify the association of the variables (P < .05).


RESULTS
The incidence of TMD 6 months after orthognathic surgery was significantly lower (P < .001). TMD intensity decreases significantly in the postoperative period. Females had a higher prevalence of TMD (P = .003) and muscular disorders preoperatively (P = .001). There was a decrease in clicks between T1 and T3 (P = .013). Mouth opening without pain worsened from T1 to T2 (P < .001) and improved from T1 to T3 (P = .015) and T2 to T3 (P < .001). The results were similar for mouth opening with pain (P < .001). In patients undergoing jaw fixation with bicortical screws, mouth opening without pain was significantly less in T3 patients than in patients undergoing fixation with plate and monocortical screws (P = .048).


CONCLUSIONS
Orthognathic surgery reduces the clinical signs and symptoms of TMD.
Student of graduate program in dentistry at Federal Univesity of Parana, Curitiba, PR, Brazil. Electronic address: Sebastiani.aline@gmail.com.
Aline Monise
AM
Sebastiani
Professor of the graduate program in dentistry, Positivo University, Curitiba/PR, Brazil.
Flares
F
Baratto-Filho
Professor of Temporomandibular Dysfunction and Orofacial Pain of the Federal University of Parana, Curitiba/PR, Brazil.
Daniel
D
Bonotto
Professor of Oral and Maxillofacial Surgery residency of the Federal University of Parana, Curitiba/PR, Brazil.
Leandro Eduardo
LE
Kluppel
Professor of Oral and Maxillofacial Surgery residency of the Federal University of Parana, Curitiba/PR, Brazil.
Nelson Luis Barbosa
NL
Rebellato
Professor of Oral and Maxillofacial Surgery residency of the Federal University of Parana, Curitiba/PR, Brazil.
Delson João
DJ
da Costa
Professor of the graduate program in dentistry, Positivo University, Curitiba/PR, Brazil.
Rafaela
R
Scariot
D000328:Adult; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D056948:Orthognathic Surgical Procedures; D015995:Prevalence; D011795:Surveys and Questionnaires; D013705:Temporomandibular Joint Disorders / Q000453:epidemiology / Q000601:surgery*; D016896:Treatment Outcome