Facial Nerve Palsy Associated With Orthognathic Surgery.

The authors report a 25-year-old female who presented facial palsy after undergoing bimaxillary orthognathic surgery for retrognathism correction. Orthognathic surgery is a procedure used to treat dentofacial deformities which aims to achieve an adequate relationship between dental archs, improving function (such as chewing, breathing, and speaking) and facial aesthetics. Even though there are some complications that can occur during the intraoperative and postoperative periods like bleeding, tooth, soft-tissue damage, nerve damage, bad split, infection, and nonunion, facial nerve injuries are considered rare complications after this kind of surgical procedure.

Adipogenic Mesenchymal Stem Cells and Hyaluronic Acid as a Cellular Compound for Bone Tissue Engineering.

This study investigates the applicability of adipose mesenchymal stem cells (mADSCs) and hyaluronic acid (HA) as a cellular compound for bone tissue engineering. A critical bone defect was created on each femur of 25 rats in vivo, receiving the following 5 graft treatments: I-Control-defect; II-HA; III-mADSCs; IV-mADSCs+HA; and V-previously osteoinduced mADSCs+HA. Evaluation using microcomputed tomography, histomorphometry, and RT-PCR analysis was performed 23 days after implantation.

Use of Recombinant Human Bone Morphogenetic Protein-2 Associated With Lyophilized Bovine Bone in Reconstruction of Atrophic Maxilla.

Cases of severely atrophic edentulous maxilla require reconstruction techniques employing bone grafts to promote adequate bone dimension for the successful placement of dental implants for prosthetic rehabilitation that reestablishes the patient's function and aesthetics. This study aims to present a severely atrophic edentulous maxilla reconstruction with the off-label use of recombinant human bone morphogenetic protein type 2 (rhBMP-2) associated with lyophilized particulate bovine bone xenograft for the prosthetic rehabilitation with osseointegrable dental implants. The paper describes a case of severely atrophic edentulous maxilla in a 42-year-old woman referred to the dental school with complaint of failure in adaptating to the dentures.

Primary Repair of a Complex Panfacial Fracture by Dog Bite.

Facial fractures due to dog attacks have an unknown incidence rate. To date, only 41 cases of canine bite trauma in a pediatric patient, associated with facial fracture, have been reported in the literature. As major species of involving dogs are the American pitbull terrier and rottweiler.

Does lag screw fixation of condylar fractures result in adequate stability? A finite element analysis.

The great incidence and controversies related to the diagnosis, treatment, surgical accesses, and type of osteosynthesis materials confer an outstanding role to condylar fractures among facial fractures. Plate configurations, with diverse formats and sizes, may be used to surgically resolve condylar fractures. With the purpose of improving the advantages and minimizing the disadvantages of fixation techniques, the neck screw was developed aiming at the needed stabilization to render a correct fixation through a system of dynamic compression.

Giant Peripheral Temporomandibular Osteoma With Immediate Reconstruction of Mandible.

Osteoma is a benign osteogenic tumor, which is characterized the slow-growing proliferation of compact or cancellous bone. The etiology of the lesion is not well established. Among the hypotheses, the following are related: a traumatic factor, infectious processes, or true neoplasm due to the origin of cartilaginous cells.

Bone Substitutes in Le Fort I Osteotomy to Promote Bone Union and Skeletal Stability.

Maxillary advancement by Le Fort I osteotomy has become the standard procedure to restore function and facial esthetics, correct skeletal and occlusal discrepancies, and treat obstructive sleep apnea in patients with facial deformities. Incomplete ossification between the bone segments at the jaw osteotomy site has proven to be a major problem in these patients. There are several studies in the literature that address orthognathic surgery, but only a limited number that discuss the use of graft materials in maxillary osteotomy.

Assessment of the Postoperative Stability of Mandibular Orthognathic Surgery for Correction of Class III Skeletal Malocclusion.

To assess the stability of mandible position after orthognathic surgery for correction of class III skeletal malocclusion. Twenty adult males, aged 18 to 40 years, with Angle class III skeletal malocclusion underwent preoperative orthodontic treatment for elimination of dental compensations followed by combined maxillomandibular surgery with rigid internal fixation. Lateral cephalograms from each patient, obtained in the natural head position before surgery, immediately after surgery, and at 6-month follow-up, were retrieved from the files of the Pontifical Catholic University of Rio Grande do Sul outpatient Oral and Maxillofacial Surgery clinic and compared.

Comparison of Neck Screw and Conventional Fixation Techniques in Mandibular Condyle Fractures Using 3-Dimensional Finite Element Analysis.

Purpose: To compare the mechanical stress on the mandibular condyle after the reduction and fixation of mandibular condylar fractures using the neck screw and 2 other conventional techniques according to 3-dimensional finite element analysis.

Materials And Methods: A 3-dimensional finite element model of a mandible was created and graphically simulated on a computer screen. The model was fixed with 3 different techniques: a 2.

Modified submandibular access for open reduction and internal rigid fixation in condylar fractures.

Purpose: The purpose of the present study was to describe a surgical technique for treatment of condylar fractures through the modified submandibular access, by means of a small incision in the mandibular angle that promotes a dissection between the parotideomasseteric and the transmasseteric fascia in a quick way and with low morbidity. Fixation may be made with plates and screws according to the technique prescribed by the surgeon.

Methods: Owing to the high incidence and importance of condylar fractures, various therapeutic methods have been described and may be divided into conservative and surgical methods.

Reduction and fixation of mandibular condylar fractures with neck screw.

Purpose: The purpose of the present study is to describe a surgical technique for the treatment of condylar fractures using an intramedullary screw.

Materials And Methods: The treatment of these fractures remains very controversial. At the time of the choice of the surgical treatment, a wide range of accesses and of techniques of reduction and fixation is used, depending on the type of the fracture, the experience of the surgeon, and aesthetical issues.

Dental findings in GAPO syndrome: case report.

This article reports the case of a young female adult with GAPO syndrome who presented as a peculiar dental finding unerupted primary and permanent dentitions, which resembled total anodontia on clinical examination. A cephalometric analysis was performed to investigate the alterations in facial bone development. This is the 9th GAPO syndrome case reported in a Brazilian patient.