title: Intraoperative Hemorrhage and Postoperative Sequelae after Intraoral Vertical Ramus Osteotomy to Treat Mandibular Prognathism.
abstract: Objective. To investigate the factors affecting intraoperative hemorrhage and postoperative sequelae after orthognathic surgery. Materials and Methods. Eighty patients with mandibular prognathism underwent surgical mandibular setback with intraoral vertical ramus osteotomy (IVRO). The correlation between the blood loss volume and postoperative VAS with the gender, age, and operating time was assessed using the t-test and Spearman rank correlation coefficient. The correlation between the magnitude of mandibular setback with the presence of TMJ clicking symptoms and lip sensation was also assessed. Results. The mean operating time and blood loss volume for men and women were 249.52 min and 229.39 min, and 104.03 mL and 86.12 mL, respectively. The mean VAS in men and women was 3.21 and 2.93, and 1.79 and 1.32 on the first and second postoperative days. There is no gender difference in the operating time, blood loss, VAS, TMJ symptoms, and lip numbness. The magnitude of mandibular setback was not correlated with immediate and long-term postoperative lip numbness. Conclusion. There are no gender differences in the intraoperative hemorrhage and postoperative sequelae (pain, lip numbness, and TMJ symptoms). In addition, neither symptom was significantly correlated with the amount of mandibular setback.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan.
authors.forename: Chun-Ming
authors.initials: CM
authors.lastname: Chen
authors.affiliation: Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan.
authors.forename: Steven
authors.initials: S
authors.lastname: Lai
authors.affiliation: Department of Conservative Dentistry, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Taiwan.
authors.forename: Ker-Kong
authors.initials: KK
authors.lastname: Chen
authors.affiliation: Graduate Institute of Dental Sciences, College of Dental Medicine, Kaohsiung Medical University, Taiwan.
authors.forename: Huey-Er
authors.initials: HE
authors.lastname: Lee
mesh_terms: D000328:Adult; D016063:Blood Loss, Surgical; D005260:Female; D006470:Hemorrhage / Q000209:etiology*; D006801:Humans; D006987:Hypesthesia; D007432:Intraoperative Period; D008046:Lip / Q000473:pathology; D008297:Male; D008334:Mandible / Q000601:surgery*; D061646:Operative Time; D010027:Osteotomy / Q000009:adverse effects*; D059229:Osteotomy, Sagittal Split Ramus / Q000009:adverse effects; D010147:Pain Measurement; D011183:Postoperative Complications; D011184:Postoperative Period; D011378:Prognathism / Q000601:surgery*; D012737:Sex Factors; D013704:Temporomandibular Joint / Q000473:pathology; D055815:Young Adult