Three-dimensional evaluation of maxillofacial symmetry improvement following orthognathic surgery in patients with asymmetrical jaw deformities.

Purpose: The aim of this study was to clarify the three-dimensional changes in maxillofacial morphology following orthognathic surgery using 3D-CT in patients with asymmetrical jaw deformities.

Methods: The subjects were 30 patients with asymmetrical jaw deformities. Three-dimensional images taken preoperatively and 6 months postoperatively were re-aligned using image processing software with the horizontal plane, coronal plane, and midsagittal plane as reference axes.

Investigation of orthognathic surgery indicators-combination with index of orthognathic functional treatment needs (IOFTN) and maxillofacial morphometric analysis.

Purpose: The aim of this retrospective study was to determine orthognathic surgery indicators for Japanese patients with jaw deformities using both Index of Orthognathic Functional Treatment Needs (IOFTN) and maxillofacial morphometric analysis.

Subjects And Methods: The subjects were 89 patients treated with orthognathic surgery and 92 patients treated with orthodontic treatment alone, and were classified as class I, II, or III according to the ANB angle. Based on the results for IOFTN and the results of cephalometric analysis, the indication criteria for orthognathic surgery were examined.

The use of an ultrasonic curettage device in orthognathic surgery decreases surgery-related blood loss.

Objective: This study aimed to compare the use of a powered instrument (PI) and ultrasonic curettage device (ULCD) with intraoperative blood loss (IOBL), drain volume (DV), calculated blood loss (CBL), and hidden blood loss (HBL) in orthognathic surgery.

Methods: We included 163 patients who underwent bimaxillary surgery in our department. CBL was calculated from the preoperative and postoperative hemoglobin levels using the "hemoglobin balance method.

Changes in nutritional status of patients with jaw deformities due to orthognathic surgery.

Objective: In orthognathic surgery, it is important to carefully manage peri-operative nutrition because maxillomandibular fixation and problems such as swelling and pain after surgery may make it difficult to eat normally and may prevent adequate nutrition. This study investigated the changes in nutritional status of patients with jaw deformities due to orthognathic surgery.

Study Design: The subjects were 155 jaw deformity patients, who underwent orthognathic surgery.

Examination of factors affecting condylar bone changes following surgical-orthodontic treatment.

Objective: To identify factors affecting condylar bone changes following surgical-orthodontic treatment.

Methods: A total of 200 patients with dentofacial deformities were classified into skeletal Classes I, II, and skeletal Class III groups consisting of 61 and 139 subjects, respectively. Temporomandibular joints (TMJs) were evaluated using clinical findings and computed tomography images before treatment, immediately before surgery, and 6 months after surgery.