Effect of Surgery First Orthognathic Approach on the Temporomandibular Joint: A Clinical Evaluation

Introduction: Correction of severe malocclusions with skeletal discrepancies requires orthodontic treatment in combination with orthognathic surgery. Even though conventional orthognathic surgery (COS) is a common and well-accepted approach its influence on the signs and symptoms of temporomandibular disorders (TMDs) is still debated. Recently with the introduction of surgery first approach, a different timing for the management of dentoskeletal imbalances has been proposed. The present study is aimed at assessing the relationship between surgery first approach and temporomandibular joint (TMJ) disorders. Methods: The study sample consisted of 24 patients who were selected to be treated with surgery first approach. Clinical follow-ups after surgery were performed every week for the first month, at 3 months, 6 months, and at 1 year. A radiological follow-up was performed at 1 week and at 1 year after the operation with a panorex and a latero-lateral teleradiograph. To assess the effect of surgery first approach on the TMDs signs and symptoms, a clinical assessment was performed 4 days before surgery (T1), 6 months after surgery (T2), and 1 year postoperatively (T3). Results: The results of the authors' study show that pain assessment revealed a general improvement of this symptom in correspondence to TMJ and masticatory muscles except in the masseter and neck region. Also joint noises, TMJ functioning, migraine, and headache underwent a considerable improvement. Conclusion: Surgery first approach is an innovative orthognathic procedure and, by undergoing surgery first approach, patients with pre-existing TMJ dysfunction may experience a significant improvement or even resolution of the TMDs signs and symptoms. Address correspondence and reprint requests to Dr Paolo De Angelis, DDS, Department of Oral and Maxillo-Facial Surgery, Catholic University of the Sacred Heart Medical School, Corso Vittorio Emanuele 28, 63100 Ascoli Piceno, Italy; E-mail: dr.paolodeangelis@gmail.com Received 10 July, 2017 Accepted 30 September, 2017 The authors report no conflicts of interest. © 2018 by Mutaz B. Habal, MD.

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