Three-dimensional accuracy of virtual planning in orthognathic surgery.

Introduction: This study aimed to assess the accuracy of virtual surgical planning (VSP) performed by Dolphin Imaging software (version 11.9; Dolphin Imaging and Management Solutions, Chatsworth, Calif).

Methods: Ten people requiring bimaxillary surgery and genioplasty were followed up prospectively.

Complex clinical case with Class III and open bite: stability after seven years.

A healthy 15-year-old boy with anterior open bite, edge-to-edge transverse discrepancy, and Class III skeletal relationship sought a nonsurgical orthodontic treatment. The patient was treated with premolars extraction, a Hyrax expander and intrusion mechanics with vertical elastics. This mechanics allowed for excellent facial and occlusal results.

Side effects of intraoral devices for OSAS treatment.

Introduction: Intraoral devices have increasingly assumed a key role in the treatment of obstructive sleep apnea syndrome, but there are limitations to their indication and side effects that result from their continuous use, as well as the use of the continuous positive airway pressure device.

Objectives: To evaluate the changes in dental positioning caused by the continuous use of mandibular advancement devices.

Methods: A prospective longitudinal study with a sample of 15 patients, with evaluation of complete documentation after a mean time of 6.

Treatment of obstructive sleep apnea with oral appliances.

Background: The purpose of this study was to evaluate the effectiveness of mandibular advancement devices (MADs) for treatment of obstructive sleep apnea syndrome (OSAS) compared with the results obtained with a placebo device in accordance with the following indicators: apnea hypopnea index (AHI) per hour of sleep, apnea index (AI) per hour of sleep, mean oxyhemoglobin saturation, sleep efficiency, and percentage of rapid eye movement (REM) sleep.

Methods: This is a controlled, prospective longitudinal study with a follow-up time of 10.5 months.

A systematic review of etiological and risk factors associated with bruxism.

Objective: The aim of the present work was to systematically review the literature and identify all peer-reviewed papers dealing with etiological and risk factors associated with bruxism.

Data Sources: Data extraction was carried out according to the standard Cochrane systematic review methodology. The following databases were searched for randomized clinical trials (RCT), controlled clinical trials (CCT) or cohort studies: Cochrane Library, Medline, and Embase from 1980 to 2011.

Multidisciplinary solution for an avulsed upper central incisor: case report.

This case report refers to an 18-year-old female who suffered from dental trauma when she was 7 years old caused by a bicycle accident. Her maxillary right central incisor was avulsed, and the left one was extrusively luxated. The left central incisor was correctly repositioned and immobilized with a semi-rigid splint.

Oral health-related quality of life and orthodontic treatment seeking.

Introduction: The aim of this study was to assess oral health-related quality of life (OHQOL) in adolescents who sought orthodontic treatment. A comparison between these adolescents and their age-matched peers who were not seeking orthodontic treatment provided an assessment of the role of OHQOL in treatment seeking.

Methods: The sample consisted of 225 subjects, 12 to 15 years of age; 101 had sought orthodontic treatment at a university clinic (orthodontic group), and 124, from a nearby public school, had never undergone or sought orthodontic treatment (comparison group).

Oral health-related quality of life in orthognathic surgery patients.

Introduction: In the last decade, an increasing number of studies focusing on the impact of oral deformities and illnesses on quality of life have been published. Our goal was to evaluate the impact of oral problems on quality of life in 3 groups of adult patients in need of orthognathic-surgical treatment.

Methods: A total of 117 patients were recruited from the Clinic of Oral and Maxillofacial Surgery of the State University of Rio de Janeiro in Brazil: 20 in the initial phase, 70 in the presurgical phase (presurgical orthodontic preparation), and 27 in the postsurgical phase.

Three-dimensional assessment of mandibular advancement 1 year after surgery.

Introduction: This prospective observational study evaluated changes in the 3-dimensional position and remodeling of the mandibular rami, condyles, and chin at splint removal and 1 year after mandibular advancement surgery.

Methods: Presurgery, splint removal (4-6 weeks postsurgery), and 1-year postsurgery cone-beam computed tomography scans of 27 subjects were used. Superimposition on the cranial base was used to assess positional or remodeling changes in the anatomic regions of interest.

Superimposition of 3D cone-beam CT models in orthognathic surgery.

INTRODUCTION: Limitations of 2D quantitative and qualitative evaluation of surgical displacements can be overcome by CBCT and three-dimensional imaging tools. OBJECTIVES: The method described in this study allows the assessment of changes in the condyles, rami, chin, maxilla and dentition by the comparison of CBCT scans before and after orthognathic surgery. METHODS: 3D models are built and superimposed through a fully automated voxel-wise method using the pre-surgery cranial base as reference.

Orthodontic treatment needs of Brazilian 12-year-old school children.

Aim: To assess the orthodontic treatment need of 12-year-old Brazilian school children using the Index of Orthodontic Treatment Need (IOTN).

Methods: One experienced examiner evaluated the IOTN's dental health component (DHC) and its esthetic component (EC) in 1,182 individuals from 50 randomly selected state schools of Rio de Janeiro. He also requested that these students score their own EC (self-perception).

Assessment of mandibular advancement surgery with 3D CBCT models superimposition.

OBJECTIVES: To assess surgery and short-term post-surgery changes in the position of the condyles, rami and chin after mandibular advancement. METHODOLOGY: Pre-surgery (T1), 1 week post-surgery (T2), and 6 week post-surgery (T3) CBCT scans were acquired for 20 retrognathic patients with short or normal face height. 3D models were built and superimposed through a fully automated voxel-wise method using the cranial base of the pre-surgery scan as reference.

Bond failure rates with a self-etching primer: a randomized controlled trial.

Introduction: The purpose of this clinical trial was to evaluate over a 12-month period the performance of a self-etching system (SEP) (Transbond Plus SEP, 3M Unitek, Monrovia, Calif) compared with a conventional multi-step system (TBXT) (Transbond XT, 3M Unitek).

Methods: Twenty-eight randomly selected patients were included in this study. They were randomly assigned to either the TBXT or the SEP group.

Evaluation of esthetic brackets' resistance to torsional forces from the archwire.

Introduction: The aim of this study was to evaluate the resistance to deformation or fracture of esthetic brackets produced by archwire torsion.

Methods: Six types of maxillary right central incisor brackets were analyzed: traditional ceramic brackets (cer); ceramic brackets reinforced with a stainless steel slot (cer/ss); ceramic brackets reinforced with a gold slot (cer/gold); traditional polycarbonate brackets (poly); polycarbonate brackets reinforced with a stainless steel slot (poly/ss); and polycarbonate brackets reinforced with ceramic fillers and a stainless steel slot (poly/cer/ss). Stainless steel wire segments were used, and the testing instrument (Emic DL 10000, São José do Rio Preto, PR, Brazil) was moved at a rate of 1 inch per minute to generate the wire torsion.

Effect of high-intensity LED units at reduced curing time on in vitro bond strength of orthodontic brackets.

Aim: To compare the shear bond strength of stainless steel brackets obtained by 3 high-intensive light-emitting diode (LED) units with conventional halogen polymerization.

Methods: A standard light-curing adhesive paste was used to bond brackets using different lamps and curing times. Eighty permanent bovine incisors were obtained and randomly divided into 4 groups.

Treatment of obstructive sleep apnea and hipoapnea syndrome with oral appliances.

Unlabelled: Obstructive sleep apnea and hipoapnea syndrome (OSAHS) is a disorder that affects about 4% of the adult population, and besides the social problems associated to snoring and extreme day time sleepiness, it is preoccupying since it may cause pulmonary hypertension and cardiac failure.

Review And Discussion: Through a literature review, we discuss the use of oral appliances to treat this condition, in regards of therapy effectiveness and limitations, main clinical symptoms, major occlusal side effects, rate of improvement and patient satisfaction.

Conclusions: We concluded that the use of oral appliances should be a first choice treatment for mild to moderate OSAHS, being dental, joint and muscular discomforts, hypersalivation and xerostomia, the most frequent clinical symptoms, with light occlusal side effects that normally do not bother the patients, with a good degree of improvement and high satisfaction index.