Effect of Osteoporosis on Bone Density of Orthognathic Osteotomy Sites in Maxillofacial Region.

Objectives: The aims of this study were to investigate the availability of Hounsfield unit (HU) measurement of computed tomography (CT) in evaluating the bone density of certain sites by comparing bone density between CT and dual-energy x-ray absorptiometry (DEXA), and to evaluate the effects of osteoporosis on osteotomy sites in orthognathic surgery.

Methods: This retrospective study included 80 patients who had undergone both facial CT and DEXA at our hospital. We selected 7 regions of interest from among the osteotomy sites in bimaxillary orthognathic surgery.

Correlation between clinical symptoms and magnetic resonance imaging findings in patients with temporomandibular joint internal derangement.

Objectives: The purpose of this study was to clarify which findings in magnetic resonance imaging (MRI) are good predicators of pain and mouth opening limitation in patients with temporomandibular joint (TMJ) internal derangement (ID).

Materials And Methods: Clinical examinations for pain and mouth opening limitation were conducted for suspected TMJ ID. MRI scans were taken within a week of clinical examinations.

Simultaneous Glossectomy with Orthognathic Surgery for Mandibular Prognathism.

Macroglossia can create dental and skeletal instability after orthodontic treatment or orthognathic surgery for mandibular prognathism. In relevant literature, partial glossectomy is suggested for a good post-treatment prognosis. Most of the published partial glossectomy cases are two-staged surgery, because of concern about postoperative airway obstruction.