Assessment of the epidemiological profile of patients with dentofacial deformities who underwent orthognathic surgery.

The present study aimed to establish the profile of patients who underwent orthognathic surgery in a private clinic by evaluating their demographic characteristics, their facial types, and aspects related to the surgical procedures that were performed. The sample consisted of 419 medical records from male and female patients aged 15 to 62 years who underwent orthognathic surgery between 2001 and 2011. A single examiner collected data by evaluating a database of information extracted from medical records, particularly radiographic and photographic analyses. The following criteria were evaluated: gender, age, skin color, type of orthognathic surgery, type of associated temporomandibular joint (TMJ) surgery, complications, and recurrences. Seventeen patients were rejected because they had incomplete records. The average age of the patients was 28.5 years old; most were females (255 patients) and faioderm (295 patients). The most prevalent facial pattern was Pattern III (n = 166, 41.3%). Orthognathic surgery that affected the maxilla, jaw, and chin was the most prevalent type (n = 199, 49.5% of cases). A genioplasty was performed concurrently with combined surgeries and single-jaw surgery in 76.86% of patients (n = 309). TMJ surgery was performed concomitantly with orthognathic surgery in 4% of cases (n = 16). The most common postoperative complication was infection/inflammation (n = 12). We concluded that there was a higher frequency of orthognathic surgery among women and young people, the brunette skin phenotype was prevalent, and most patients had a combination of maxillary and mandibular problems.

Dimensional analysis of the parietal bone in areas of surgical interest and relationship between parietal thickness and cephalic index.

PURPOSE: The aim of this study was to determine the thickness of the parietal bone in bone graft donor sites and to study the relationship between parietal bone thickness and gender or cephalic index. MATERIALS AND METHODS: We studied 300 parietal bones from 150 human skulls (84 male and 66 female) from individuals aged 18 to 60 years at the time of death. On each parietal bone, 9 areas were drawn by use of reference anatomic landmarks (bregma, lambda, asterion, and pterion), and bone thickness was determined in the areas adjoining the sagittal suture--superior-anterior (Sa), superior-medial (Sm), and superior-posterior (Sp). RESULTS: Mean thickness measurements ranged from 2.30 to 11.25 mm in the Sa area, from 3.08 to 13.32 mm in the Sm area, and from 2.88 to 12.26 in the Sp area. Smaller mean measurements were observed in the Sa area, with the smallest mean thickness being found in brachycephalic female specimens. The largest mean thickness was also found in female specimens in the Sm area. Statistically significant differences between genders were found only in the Sa area in dolichocephalic and mesocephalic specimens. CONCLUSION: Although the best bone graft donor site surgically is different in individuals of different genders and with different cephalic indexes, our findings suggest that harvesting from the anterosuperior area of the parietal bone should not be performed.

Skeletal stability in orthognathic surgery: evaluation of methods of rigid internal fixation after counterclockwise rotation in patients with class II deformities.

Our aim was to assess the influence of internal fixation in skeletal stability on patients who had had counterclockwise rotation of the maxillomandibular complex and mandibular advancement procedures. We studied 60 records of 20 patients (14 female, 6 male), mean (range) age at operation 29 (16-50) years. The mean (range) postoperative follow-up was 15 (8-24) months. Sixty standard lateral cephalometric radiographs were randomly traced and digitised by one senior radiologist to estimate surgical and postoperative changes. Patients were divided into two groups, the first group (n=10) of which had fixation with only 2.0 system plates (2 plates with monocortical screws alone) and the second (n=10) of which had hybrid fixation (1 plate with monocortical screws and 2 or 3 bicortical bone screws). During operation the change in the mean occlusal plane with counterclockwise rotation was 9.4° (range -17.3 to -2.5mm). The maxilla moved forward and upward. All the anterior mandibular measurements had advanced horizontally, the mean (range) being 17 (6.4 to 9.9) mm for the pogonion, and 17.6 (6.0 to 30.7) mm for the menton. At the longest follow-up period, there were significant long-term changes, but these were clinically acceptable (<2mm). There was no significant difference between the two groups in postoperative stability or in the magnitude of the advancement and stability.

Epidemiologia dos cistos e tumores odontogênicos tratados sob anestesia geral, em um hospital filantrópico de Salvador: Bahia / Epidemiology of odontogenic cysts and tumors treated under general anesthesia in a philanthropic hospital in Salvador: Bahia

Objetivo: A proposição do presente trabalho foi analisar a frequência relativa dos vários tipos histológicos de cistos e tumores odontogênicos benignos. Metodologia: por meio do estudo retrospectivo de prontuários dos pacientes submetidos a tratamento no Hospital Santo Antônio - obras Sociais Irmã Dulce, Salvador-BA, Brasil, sob anestesia geral, durante o período de 2004-2010. Foram avaliados: idade, gênero, tipo histológico, sítio anatômico, tratamento realizado e recorrência. Resultados: observaram-se 34 pacientes do gênero feminino e 24 do gênero masculino. o ameloblastoma (43%) foi o tipo histológico mais frequente, seguido do tumor odontogênico ceratocístico (26%), mixoma odontogênico (10%) e odontoma (9%). entre os cistos, o maior percentual foi de cisto paradentário (60%). A média de idade foi de 28,1 anos. A principal localização anatômica foi a mandíbula em região posterior.

Purpose: The purpose of this study was to analyze the relative frequency of the various histologic types of odontogenic cysts and tumors. Methodology: A retrospective study was conducted based on the medical records of patients undergoing treatment at Hospital Santo Antônio - obras Sociais Irmã Dulce, Salvador-BA, Brazil, under general anesthesia during the period 2004-2010. Age, gender, histological type, anatomic site, treatment performed and recurrence were evaluated. Results: The study comprised 58 patients (34 females and 24 males). Ameloblastoma (43%) was the most common histological type, followed by the keratocystic odontogenic tumor (26%), odontogenic myxoma (10%) and odontoma (9%). Among the cysts, the paradental cyst showed the highest percentage (60%). The mean age was 28.1 years. The main anatomical location was the posterior region of the mandible.