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2026 Apr-Jun; Vol 17, No 2:e4 |
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Systematic Dietary Interventions to Minimize Postoperative Weight Loss Following Orthognathic Surgery: a Randomized Controlled Trial J Oral Maxillofac Res 2026;17(2):e4 doi:10.5037/jomr.2026.17204 Abstract | PDF |
Systematic Dietary Interventions to Minimize Postoperative Weight Loss Following Orthognathic Surgery: a Randomized Controlled Trial
1Department of Oral and Maxillofacial Surgery, Aalborg University Hospital, Aalborg, Denmark.
2Clinical Nursing Research Unit, Aalborg University Hospital, Aalborg, Denmark.
3Department of Health Science and Technology, Aalborg University, Aalborg, Denmark.
4Research Data and Biostatistics, Aalborg University Hospital, Aalborg, Denmark.
5Department of Clinical Medicine, Aalborg University, Aalborg, Denmark.
Corresponding Author:
Clinical Nursing Research Unit, Aalborg University Hospital
Søndre Skovvej 15, 9000 Aalborg
Denmark
Phone: +45 23 49 75 19
E-mail: karin.mikkelsen@rn.dk
ABSTRACT
Objectives: This randomized controlled trial aimed to assess whether structured dietary interventions, implemented both before and after orthognathic surgery, could minimize postoperative weight loss during the first eight weeks.
Material and Methods: The study was conducted between April 2017 and April 2022, involving patients undergoing singleor bimaxillary surgery. Participants were randomly allocated into three groups: intervention 1 (nutritional tube feeding), intervention 2 (oral intake nutritional supplements), and control (standard care). Body composition was assessed using a body composition analyser (Tanita BC-418) at five time points: presurgery examination, admission, and follow-ups weeks 1, 3, and 8. Primary outcome was weight; secondary - BMI, fat mass, fat-free mass, total body water, and visceral fat rating. Compliance was assessed from patient questionnaires and hospitalization records based on adherence to the prescribed nutritional intake before and after surgery.
Results: In total 150 patients were included, without statistically significant differences in age (28.6 [SD 10.4] years, P = 0.7) and BMI (24.9 [SD 5.6], P = 0.72). All groups experienced significant weight loss postoperatively (week 1: P < 0.001; week 3: P < 0.001; week 8: P < 0.001), with control showing slightly greater loss at week 8 (-3.03 kg vs. -2.18 and -2.67 kg; P = 0.11). Compliance during hospitalization was higher in intervention 1 (71.8%) than intervention 2 (55.1%; P = 0.02). No significant differences were found in body mass index or body composition changes.
Conclusions: There was no statistically significant effect of systematic dietary interventions versus standard care on postoperative weight loss or body composition after orthognathic surgery. Higher adherence did not improve clinical outcomes.
J Oral Maxillofac Res 2026;17(2):e4
doi: 10.5037/jomr.2026.17204
Accepted for publication: 30 June 2026
Keywords: compliance; dietary supplements; orthognathic surgery; randomized controlled trial; weight loss.
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To cite this article: Systematic Dietary Interventions to Minimize Postoperative Weight Loss Following Orthognathic Surgery: a Randomized Controlled Trial J Oral Maxillofac Res 2026;17(2):e4 URL: http://www.ejomr.org/JOMR/archives/2026/2/e4/v17n2e4ht.htm |
Received: 20 March 2025 | Accepted: 30 June 2026 | Published: 30 June 2026
Copyright: © The Author(s). Published by JOMR under CC BY-NC-ND 3.0 licence, 2026.