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Impact of orthodontic-surgical treatment on quality of life: a meta-analysis.

BACKGROUND
Orthognathic surgery involves a change in the patient's functional and aesthetic aspects.


OBJECTIVE
The objective was to answer the following focused question: what is the impact on quality of life (QoL; aesthetic, function, social, and psychological aspects) in patients undergoing orthodontic-surgical treatment?


SEARCH METHODS
Appropriate word combinations and truncations were selected and tailored specifically for each electronic database: PubMed/Medline, Scopus, Web of Science, PsycInfo, and Latin American and Caribbean Health Sciences Literature and gray literature.


SELECTION CRITERIA
Studies that met the following criteria was included: patients with dentofacial deformity (P); surgical correction through orthodontic-surgical treatment (E/I); before orthodontic-surgical treatment or patients with no dentofacial deformity (C); QoL (O); cross-sectional, cohort, case-control and randomized or non-randomized clinical trial (S).


DATA COLLECTION AND ANALYSIS
In phase 1, two reviewers independently reviewed the titles and abstracts of all references. All articles that did not meet the inclusion criteria were excluded. In phase 2, the same reviewers completely read the selected articles independently.


RESULTS
A total of 2879 articles were retrieved during the final database search. Fifty-two articles were selected for full reading, of which 16 were excluded, resulting in 36 included articles. The meta-analysis was performed using 13 of the selected studies. When comparing the period before any treatment with the post-operative period of 4-8 weeks, there was an association only for facial aesthetics (mean difference = 3.00; 95 per cent confidence interval = 1.10-4.89; inconsistency index = 63 per cent). The comparison between the period before any treatment with the 6 month post-operative period showed an improved QoL in all of the domains evaluated and, when comparing data after the orthodontic-surgical preparation (before surgery) and after 5-12 months of surgery, there was also statistical significance with an increased QoL for all of the domains evaluated.


CONCLUSIONS
In conclusion, based on the results of this systematic review and meta-analysis, the evidence suggests an improvement in the QoL of patients undergoing orthodontic-surgical treatment regarding aesthetic, functional, social, and psychological aspects.


REGISTRATION
CRD42017069495.