Evaluation of two different rapid maxillary expansion surgical techniques and their effects on the malar complex based on 3d cone-beam computed tomography.

We compared and evaluated the effects of two techniques used for surgically assisted rapid maxillary expansion (SARME) using three-dimensional (3D) cone-beam computed tomography, focusing on changes in soft and hard tissue in the malar region. A conventional Le Fort I osteotomy group (10 patients, mean age: 19.3 years) and a high Le Fort I group (12 patients, mean age: 20.4 years) underwent 3D analyses. Changes in hard and soft tissue of the malar region were compared. The average increases in the bone malar width and soft malar width in the high Le Fort I group between the pre- and postoperative periods were 1.43 ± 1.23 and 1.39 ± 1.19 mm, respectively. The average increases in the bone malar depth on the right and left sides in the high Le Fort I group were 1.34 ± 0.81 and 1.60 ± 0.54 mm, respectively. Progress in hard tissues did not reflect significant changes in soft tissue. CONTEXT: Effects of high Le Fort I SARME on the malar complex. AIMS: To compare and evaluate the effects of two techniques used for SARME, using 3D cone-beam computed tomography, focusing on changes in hard and soft tissues in the malar region. SETTINGS AND DESIGN: A conventional Le Fort I osteotomy group (10 patients, mean age: 19.3 years) and a high Le Fort I group (12 patients, mean age: 20.4 years). METHODS AND MATERIAL: Each group underwent 3D analyses, and changes in hard and soft tissues of the malar region were compared. STATISTICAL ANALYSIS USED: The SPSS software (ver. 15.0 for Windows) was used. The Kolmogorov-Smirnov test, Student's t test, and paired-samples test were conducted. RESULTS: The average increases in the bone malar width and soft malar width in the high Le Fort I group between the pre- and postoperative periods were 1.43 ± 1.23 and 1.39 ± 1.19 mm, respectively. The average increases in the bone malar depth on the right and left sides in the high Le Fort I group were 1.34 ± 0.81 and 1.60 ± 0.54 mm, respectively. CONCLUSIONS: Progress in hard tissues did not reflect significant changes in soft tissue.

Sliding malar bone augmentation technique with a high le fort I surgically assisted rapid maxillary expansion.

The purpose of this report is to evaluate the effectiveness of a high Le Fort I osteotomy design, including the malar bones, which allows segment sliding over the zygoma and forces the osteotomized segment to move forward with distraction. Two patients (male, 23-and 30-year-old) with malar deficiency underwent high Le Fort I osteotomy and surgically assisted rapid maxillary expansion procedure was followed. Records were taken before and 6 months after surgery for comparison, including intra and extra oral photographs and three-dimensional cone-beam computed tomography (CBCT) images. The bone malar width and bone malar depth changings in malar region were evaluated. Preoperative and postoperative CBCT images and clinical views of the patients showed forward movement of the malar region.

Comparison of increased overjet cases and controls: normative data for condylar positions.

The aim was to compare normal overjet versus large overjet cases with clinically healthy temporomandibular joints (TMJ); to establish normative data regarding the difference between condylar positions in centric occlusion (CO) and maximum intercuspation (MI) and deflective CO contacts. Two study groups of normal overjet and large overjet cases consisted each of 33 subjects with no detectable clinical signs of temporomandibular disorder (TMD). CO-MI differences were recorded using the SAM Mandibular Position Indicator. Deflective contacts were examined on models mounted in CO. There was a significant difference between groups in the vertical (P = 0.030) and transverse (P = 0.008) range of movement from CO to MI, but not in the antero-posterior direction. There were no differences in the location of deflective contacts. Results of this study showed that patients with increased overjet show some differences compared with normal overjet patients, even in the non-patients. Further research on TMD patients is needed to find out about the role these features play in the aetiology and treatment of temporomandibular disorder (TMD). This study indicates that the clinician should be paying special attention to the TMJ status of patients with a large overjet.

Comparison of deep bite and open bite cases: normative data for condylar positions, paths and radiographic appearances.

To compare normal overbite, deep bite and open bite cases with clinically healthy temporomandibular joints (TMJ) regarding the difference between condylar positions in centric relation (CR) and habitual or centric occlusion (CO), condylar paths and radiographic findings of condylar appearance in order to establish normative data. Three study groups of normal overbite, deep bite and open bite cases consisted each of 30 subjects with no detectable clinical signs of temporomandibular disorder. The CR-CO differences and axiographic tracings were recorded using the School Artikulator of Mack (SAM) diagnostic system. Condylar shape was evaluated on panoramic radiographs. The CR-CO differences were greater in the vertical plane in open bite cases, and direction of movements from CR to CO showed great variability. Open bite cases had significantly shorter condylar paths. Radiographic findings exhibited that 23% of the total sample showed evidence of erosion and 83% evidence of flattening of condyles. The erosion rates were higher in the open bite group, but flattening was seen more often in the deep bite group. Results of this study showed that open bite cases show larger vertical CR-CO slides and, shorter protrusion paths than normal and deep overbite cases. The radiographic appearance of condyles in non-patients may also differ significantly according to vertical incisor guidance type. Deep bite cases demonstrated a higher incidence of condylar flattening. This study indicates that the clinician should be paying special attention to the TMJ status of open bite patients.

Investigation of bacteremia following orthodontic debanding.

The aim of this study was to investigate the prevalence of bacteremia after orthodontic debanding and debonding. The study group comprised 30 patients (10 men, 20 women). All were treated using the Edgewise technique. Patients with acceptable oral hygiene and fixed appliances in both jaws were included in the study group. Blood samples were obtained using a strict aseptic technique before and after removal of bands and brackets. A 6.6% bacteremia prevalence was observed in both preoperative and postoperative blood samples.

Ellis-van Creveld syndrome: dental, clinical, genetic and dermatoglyphic findings of a case.

Dental, clinical, genetic and dermatoglyphic findings of an additional female case with Ellis-van Creveld syndrome (EVC) are presented and compared with those of the cases cited in the literature. The dermatoglyphics of the case was remarkable.

Hypocalcification type amelogenesis imperfecta in permanent dentition in association with heavily worn primary teeth, gingival hyperplasia, hypodontia and impacted teeth.

A female patient with hypocalcification type amelogenesis imperfecta in permanent dentition in association with heavily worn primary teeth, gingival hyperplasia, hypodontia and impacted teeth is presented.

Comparisons between cervical vertebrae and hand-wrist maturation for the assessment of skeletal maturity.

It was claimed that, skeletal maturity could be determined by using anatomical changes of the cervical vertebrae observed on the lateral cephalometric radiographs. In this method of assessment cervical vertebrae C2, C3, and C4 are observed and each patient is placed in a cervical vertebrae maturation index (CVMI). Fishman developed a system of hand-wrist skeletal maturation indicators (SMI), using four stages of bone maturation at six anatomic sites. The purpose of this study was to analyze associations between cervical vertebrae maturation index (CVMI) and skeletal maturation index (SMI). The second objective was to determine the reproducibility of the identifications on the lateral cephalograms and hand-wrist films. Lateral cephalometric and left hand-wrist radiographs of 180 untreated subjects (99 girls and 81 boys) aged from 8 to 18 years were obtained from the files of the Marmara University School of Dentistry, Department of Orthodontics. The results of this study indicated that cervical vertebrae maturation and hand-wrist skeletal maturation were significantly related.

Cephalometric evaluation of maxillary retrognathism cases treated with FR-3 appliance.

The purpose of this investigation was to evaluate the efficiency of the FR-3 appliance on functional Cl III malocclusion cases. A total of 45 functional Cl III cases were chosen from a general clinic intake of which 25 were treated with the FR-3 appliance and 20 were untreated and were taken as a control group. Patients that were treated with FR-3 had the following characteristics: Cl III with maxillary deficiency; functional anterior cross-bite; absence of anterior open-bite; patients in mixed dentition. The mean age in the treatment group was 8.4 years 8.8 years in the control group. The observation period was one year for both groups. The results were as follows: Sagittal forward growth stimulation was not observed in the maxilla. Mandibular growth was redirected in the vertical direction. The SNB angle decreased in that the mandible rotated downward and backward. The ANB angle increased. There was an increase in total and lower anterior facial height and reduction in the overbite. Another skeletal change observed was the increase in the cranial flexure angle. Improved dental results were a significant amount of overjet increase and a decrease in the IMPA. There was also a beneficial effect on the soft tissue profile.

Cephalometric evaluation of crib therapy for cases of mixed dentition (open bite).

The effect of crib therapy for the treatment of cases of open bite was investigated. Extrusion of the lower and upper incisors and intrusion of the lower first molars were the most significant effects of the appliance. Intrusion of the lower molars resulted in decreased lower facial height. These findings were considered to result from the posterior tongue posture. Thus, the clockwise pattern of the mandibular complex was changed to a counter-clockwise pattern.