Biotypic classification of facial profiles using discrete cosine transforms on lateral radiographs.

Objective: The aim of the study was to use discrete cosine transforms to graph soft tissue curves in lateral cephalometric radiographs and, with the obtained mathematical values, to group these curves by both traditional biotypes and cluster systems, in order to evaluate discriminatory capacity in terms of accuracy.

Design: A sample of 625 lateral radiographs of adult patients (319 women and 306 men) was classified by facial biotype based on the ANB angle and mandibular plane angle. The curves of the facial profile were digitized with 50 equidistant points and discrete cosine transform was applied to analyze these curves mathematically for the determination of the accuracy of the classification of traditional biotypes.

Autoimmune temporomandibular arthropathy: diagnostic considerations.

The etiology of degenerative processes of the temporomandibular joint (TMJ) remains unclear, as they could be the result of trauma, infection, or autoimmune disease. Improving the diagnosis of autoimmune disease, whether the TMJ is the primary site or secondarily affected by a systemic disease, is of fundamental importance in selecting treatment that will address the causes rather than just relieve the symptoms. The purposes of this article are to discuss autoimmunity as an etiologic factor in degenerative processes of the TMJ by presenting clinical cases and to highlight the importance of imaging and serologic examinations for diagnosis.

Evaluation of natural mandibular shape asymmetry: an approach by using elliptical Fourier analysis.

Objectives: The purpose of this study was to demonstrate that asymmetry is a natural occurring phenomenon in the mandibular shape by using elliptical Fourier analysis.

Methods: 164 digital orthopantomographs from Colombian patients of both sexes aged 18 to 25 years were collected. Curves from left and right hemimandible were digitized.

Application of Dexamethasone in the Masseter Muscle During the Surgical Removal of Lower Third Molars.

Purpose: The aim of the present study was to analyze the effect of the application of dexamethasone in the masseter muscle during third molar surgery.

Methods: This randomized, clinical trial used dependent samples and the split-mouth method. A sample of 30 patients, with impacted or semi-impacted third molars, as well as vertical and mesioangular positions of a similar surgical difficulty (on both sides), was subjected to 2 operations: an experimental operation and a control procedure, with a 30-day wash-out.

Ear pruritus: a new otologic finding related to temporomandibular disorder.

This prospective clinical study evaluated the correlation among temporomandibular disorder (TMD), otologic manifestations, and parafunctional habits in a sample of 100 patients with TMD. The subjects were evaluated by clinical examination, use of a simplified anamnestic questionnaire for TMD diagnosis, and the investigation of otologic manifestations and parafunctional habits of the stomatognathic system. The prevalence of TMD and correlations with otologic manifestations and parafunctional habits were calculated.

The biopolymer sugarcane as filling material of critical defects in rats.

Purpose: To evaluate the effects of particulate (granule-shaped) SCB on bone repair relating it to its biocompatibility and bone neoformation.

Methods: Thirty Wistar rats were submitted to a one 7-mm-diameter defect and divided equally into three experimental groups, with two different postoperative times of evaluation, 90 and 120 days. Each calvaria defect was filled up with clot (control group), particulated autogenous bone or granulated SCB.

Effectiveness and satisfaction evaluation of patients submitted to TMJ arthrocenthesis: a case series.

The aim of this study was to evaluate the effectiveness and level of satisfaction of patients who underwent TMJ arthrocentesis under local anesthesia by considering the following parameters: joint pain, mouth opening, mastication, and satisfaction. Fourteen patients (13 women and one man; mean age, 37.6 years with TMJ arthralgia were selected.

Evaluation of the nasal shape after orthognathic surgery.

Introduction: Patients with dentofacial deformities may benefit from orthognathic surgery in the maxilla. Maxillary osteotomy may include procedures in the bone, cartilaginous, and soft tissues of the nose, leading to shape alterations.

Objective: To evaluate the anatomic alterations of the nasal region in patients undergoing a Le Fort I osteotomy for advancement or superior impaction.

Juvenile psammomatoid ossifying fibroma with massive mandibular involvement.

Juvenile psammomatoid ossifying fibroma (JPOF) is a histologic variant of an ossifying fibroma. While an ossifying fibroma varies in appearance, it consists of fibrocellular tissue and mineralized material. JPOF is a rare benign lesion; however, it can be extended locally and mimic a malignant tumor.

Conservative treatment of an aggressive odontogenic tumor: a case report.

An ameloblastoma is a polymorphic, benign, locally invasive tumor made up of odontogenic epithelium, clinically characterized by slow, progressive, painless growth. There are reports in the literature on the treatment of ameloblastomas with aggressive mural invasion through resections, in order to minimize recurrence. However, different approaches may be used at the bone level, such as curettage combined with a chemical fixative (Carnoy's solution), cryotherapy, or thermal cauterization.

Evaluation of changes in nasal airway in patients having undergone surgically assisted maxillary expansion.

Introduction: Surgically assisted maxillary expansion (SAME) is used to treat transverse maxillary discrepancies. The effect of this technique on the nasal airway has been the subject of a large number of studies.

Objective: The aim of the present study was to identify changes in the nasal airway in patients having undergone SAME.

Is a 5 mm rat calvarium defect really critical?

Purpose: To evaluate bone regeneration in critical defects in the rats' calvarium.

Methods: Eighteen rats Wistar were divided into three groups of six animals each according to the time of evaluation (15, 30 and 60 days). One calvarium defect of 5 mm was made in the parietal bone of each animal under general anesthesia.

Evaluation of fixation techniques with titanium plates and Kirschner wires for zygoma fractures: preliminary study.

Objective: The aim of the present study was to assess the quality of treatment using two reduction and fixation techniques for zygoma fractures.

Patients And Methods: A randomized clinical trial was carried out involving a sample of 10 patients with Knight and North type III, IV and V zygoma fractures divided into two groups. One group underwent the closed reduction technique and fixation with Kirschner wire and the other group underwent the open reduction technique and fixation with titanium plates.

[Anxiety regarding dental treatment: prevalence and predictors among Brazilians].

Considering the negative impact anxiety can exert over dental treatment, the scope of this study was to determine the prevalence of predictors of anxiety regarding dental treatment among Brazilians. A cross-sectional study was carried out using the Corah dental anxiety scale to assess the degree of anxiety regarding dental treatment among 3000 patients. The results reveal that two out of every eight Brazilian patients manifest moderate to severe anxiety regarding dental treatment.

Mandibular desmoplastic ameloblastoma: case report.

Desmoplastic ameloblastoma (DA) is a tumor characterized by unique clinical, radiological, and histopathologic features, mostly an abundance of densely collagenous stroma with small nests and islands of odontogenic epithelium. Due to its aggressive, highly invasive nature, there is a tendency to treat DA with bone resection. This article reports and discusses an uncommon case of mandibular DA, focusing on the importance of early, effective treatment.

The use of Portland cement in the repair of mandibular fractures in rats.

Purpose: To evaluate the bone healing of mandibular fractures following the use of Portland cement.

Methods: Thirty-two male Wistar rats were divided into control and experimental groups. In the control group the rats were submitted to a mandibular fracture, which was reduced, and the soft tissues were sutured.

Fracture of the atrophic mandible: case series and critical review.

Purpose: Atrophic mandible fracture is common among elderly patients. Such fractures present management difficulties related to anatomic and physiologic alterations in this population. The purpose of this study was to evaluate the results of this type of fracture treatment and to realize a critical review of literature on the subject.

Comparison between human and rat TMJ: anatomic and histopathologic features.

Purpose: To describe and evaluate normal rat temporomandibular joints from anatomic and histopathologic point of view and make a comparison between this joint in rats and humans.

Methods: Twelve male adult Wistar rats (12 same side joints) were used in this procedure. The following anatomical structures were histologically evaluated in a qualitative fashion: condyle, disc, temporal bone, retrodiscal tissue and synovia.

Treatment of chronic mandibular dislocations: a comparison between eminectomy and miniplates.

Purpose: Temporomandibular joint dislocation is defined as an excessive forward movement of the condyle beyond the articular eminence with complete separation of the articular surfaces and fixation in that position. The purpose of this study was to compare 2 types of treatment for chronic mandibular dislocations, eminectomy and miniplates, evaluate the results of these surgeries, and make a critical review of the literature.

Patients And Methods: The sample was obtained from the records of Oswaldo Cruz Hospital (Recife, Brazil) and comprised cases submitted to chronic mandibular dislocation treatment by eminectomy and by use of miniplates between 2000 and 2006.

Epidemiological study of patients with facial trauma treated at the Antônio Targino Hospital - Campina Grande/Paraíba.

Unlabelled: Information contained in the present study can better explain the type of care performed in this service, which is paramount in order to plan, organize and improve medical care here.

Aim: the goal of the present study was to carry out a retrospective epidemiological study concerning facial trauma from August 2006 to August 2007.

Materials And Methods: 211 charts were studied in order to collect patient data regarding the number of patients seen, gender, age, year and their origin, surgical approaches and cases.

Comparison between electrosurgery and cold blade in tongues of rats: a preliminary experimental study.

Purpose: To compare tissue cicatrization in the tongue of rats using electrosurgery and the cold blade.

Methods: Ten adult male Wistar rats were divided into two groups of 5 animals each, according to the time of sacrifice (3 and 7 days). Each animal had two incisions, one made with a cold blade and the other with an electric blade, both of which were approximately 0.