SciCombinator

Discover the most talked about and latest scientific content & concepts.

Journal: Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons

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PURPOSE: To directly compare the clinical effectiveness of maxillomandibular advancement (MMA) and uvulopalatopharyngoplasty (UPPP)-performed alone and in combination-for the treatment of moderate to severe obstructive sleep apnea (OSA). PATIENTS AND METHODS: The investigators designed and implemented a retrospective cohort study composed of patients with moderate to severe OSA (baseline AHI >15). The predictor variable was operative treatment and included MMA, UPPP, and MMA followed by UPPP (UPPP/MMA). The primary outcome variable was the apnea-hypopnea index (AHI) measured preoperatively and 3 months to 6 months postoperatively. Other variables were grouped into the following categories: demographic, respiratory, and sleep parameters. Descriptive and bivariate statistics were computed. RESULTS: The sample was composed of 106 patients grouped as follows: MMA (n = 37), UPPP (n = 34), and UPPP/MMA (n = 35) for treatment of OSA. There were no significant differences between the 3 groups for the study variables at baseline, except for AHI. Surgical treatment resulted in a significant decrease in AHI in each group: MMA (baseline AHI, 56.3 ± 22.6 vs AHI after MMA, 11.4 ± 9.8; P < .0001), UPPP/MMA (baseline AHI, 55.7 ± 49.2 vs AHI after UPPP/MMA, 11.6 ± 10.7; P < .0001), and UPPP (baseline AHI, 41.8 ± 28.0 vs AHI after UPPP, 30.1 ± 27.5; P = .0057). After adjusting for differences in baseline AHI, the estimated mean change in AHI was significantly larger for MMA compared with UPPP (MMA AHI, -40.5 vs UPPP AHI, -19.4; P = < .0001). UPPP/MMA was no more effective than MMA (P = .684). CONCLUSION: The results of this study suggest that MMA should be the surgical treatment option of choice for most patients with moderate to severe OSA who are unable to adequately adhere to CPAP.

Concepts: Cohort study, Clinical trial, Sleep apnea, Obstructive sleep apnea, Hypopnea, Uvulopalatopharyngoplasty

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To develop and test a novel, hydraulic, continuous, automated distraction device capable of 3D movements for treatment of mandibular deformities.

Concepts: Distraction osteogenesis

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Proportionality of the lower and middle thirds of the face is a key determinant of successful orthognathic treatment. A flatter profile and marked variance of the soft tissue envelope in the Japanese population complicates the accurate assessment of these proportions. This study aimed to identify gender differences and establish norms for Japanese young adults using the method of soft tissue cephalometric analysis (STCA) by Arnett et al (Am J Orthod Dentofacial Orthop 116:239, 1999).

Concepts: Sample size, Biology, Method acting, Sociology, Tissues, Japan, Soft tissue, Face

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This report describes a case of gossypiboma in the septum. A 31-year-old woman presented with nasal obstruction and crusting that started 2 years previously after she underwent rhinoseptoplasty in another private clinic. Physical examination disclosed remaining posterior septal deviation to the left side with septal mucosal erosion on the left side. Under general anesthesia, the septal flap was elevated on the left side of the nasal cavity. A gossypiboma was found around the perpendicular ethmoid plate and between the septal flaps. The perpendicular ethmoid plate was resected and the gossypiboma was removed under endoscopy. Because of severe adhesion between the gossypiboma and the septal mucosa, removal of the gossypiboma resulted in a defect on the left mucoperichondrial flap. Right inferior turbinate mucosa was harvested and grafted on the mucosal defect of the left side. Five months after the operation, the nasal cavity showed a straight septum with a well-healed mucosa without any nasal symptoms. This case is a reminder of the fundamental importance of absolute care at every step of rhinologic surgery.

Concepts: Anesthesia, Mucus, Nose, Nasopalatine nerve

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Cyanoacrylate has been used as a commercial tissue adhesive. Recently, ethyl 2-cyanoacrylate has been suggested for the fixation of onlay autogenous bone graft. However, ethyl 2-cyanoacrylate must be biocompatible with bone tissue. This study evaluated the cytotoxicity of cyanoacrylate adhesives using a direct contact assay on human oral osteoblast cells.

Concepts: Bone, Cell, Cytotoxicity, Bone morphogenetic protein, Adhesive, Bone grafting, Adhesives, Cyanoacrylate

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Postsurgical changes of the airway have become a great point of interest and often have been reported to be a predisposing factor for obstructive sleep apnea after mandibular setback surgery. The purpose of this study was to evaluate the 3-dimensional volumetric changes in the upper airway space of patients who underwent bimaxillary surgery to correct Class III malocclusions.

Concepts: Dimension, Sleep apnea, Obstructive sleep apnea, Abnormal respiration

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To estimate the prevalence of preoperative periodontal defects and analyze 12-month spontaneous healing on the distal aspect of the mandibular second molar (M2) after impacted mandibular third molar (M3) extraction.

Concepts: Teeth, Molar, Wisdom tooth, Mandibular third molar

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Approximately 35% to 60% of all patients with head and neck cancer are malnourished at the time of their diagnosis because of tumor burden and obstruction of intake or the anorexia and cachexia associated with their cancer. The purpose of this article is to provide a contemporary review of the nutritional aspects of care for patients with head and neck cancer.

Concepts: Head and neck anatomy, Head and neck, Cancer, Oncology, Obesity, Funk, Prince, Jimmy Jam and Terry Lewis