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Orthognathic Surgery Has a Significant Positive Effect on Perceived Personality Traits and Perceived Emotional Facial Expressions in Subjects With Primary Mandibular Deficiency

Posnick, Jeffrey C. DMD, MD*; Kinard, Brian E. DMD, MD

doi: 10.1097/SCS.0000000000005915
Original Articles

This study tested the hypothesis that a layperson's social perceptions of a dentofacial deformity (DFD) patient with primary mandibular deficiency (PMD) are more positive after bimaxillary orthognathic surgery.

A survey was implemented comparing layperson's social perceptions of emotional expressions and personality traits before and >6 months after orthognathic surgery when viewing standardized facial photographs. The study sample comprised 20 patients selected randomly from a larger primary mandibular deficiency database, treated by 1 surgeon after orthognathic surgery. The outcome variable was change in 6 perceived emotional expressions and 6 personality traits studied. Descriptive and bivariate statistics were computed (P < .05).

Five hundred respondents (raters) completed the survey. The respondents were 52% male with 44% aging from 25 to 34. After bimaxillary and chin orthognathic surgery, primary mandibular deficiency patients were perceived to be significantly more dominant, trustworthy, friendly, intelligent, attractive, and less threatening (P < .05). They were also perceived as happier and less angry, surprised, sad, afraid, or disgusted than before surgery (P < .05).

Laypeople consistently report improved social traits in primary mandibular deficiency patient's perceived emotional expressions and perceived personality traits after bimaxillary and chin orthognathic surgery.

*Director, Posnick Center for Facial Plastic Surgery, Chevy Chase, MD; Clinical Professor of Surgery and Pediatrics, Georgetown University, Washington, DC; Clinical Professor of Orthodontics, University of Maryland School of Dentistry, Baltimore, MD; Adjunct Professor of Oral and Maxillofacial Surgery, Howard University College of Dentistry, Washington, DC

Posnick Center for Facial Plastic Surgery, Chevy Chase, MD.

Address correspondence and reprint requests to Jeffrey C. Posnick, DMD, MD, 5530 Wisconsin Ave, Suite 1250 Chevy Chase, MD 20815; E-mail:

Received 5 November, 2019

Accepted 8 November, 2019

The authors report no conflicts of interest.

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© 2019 by Mutaz B. Habal, MD.