When Papacarie® was used prior to the application of a bonding agent it could interfere with the formation of the hybrid layer without changing the length of the tag. Moreover, the morphology in the experimental group was found to be more uniform and regular.
Objective: To analyse the number of septa in the maxillary sinuses using computed tomography (CT) in correlation with gender, age and the presence of teeth in the region. Materials and methods: The sample consisted of 300 CT scans obtained from a private radiology clinic between 2009 and 2011. The CT scans included in the study should have the appropriate image of the maxillary sinus and contain information regarding age, gender and the date of the examinations. Patients with a history of pathologies in the region, patients who underwent floor of mouth surgery and patients less than 20 years of age were excluded from the sample. The authors considered osseous septa to be septa with a height above 4 mm in relation to the base of the sinus floor. The sample was divided into three groups: (i) presence of all teeth, (ii) partially edentulous -a minimum of two teeth present between the second premolar and second molar -and (iii) totally edentulous. The data were divided and stratified by age and gender. Results: The frequency of septa in the maxillary sinus was 37.80% (n = 183). No significant difference was observed among the five age groups (P > 0.05); additionally, there was no significant difference in septa frequency (P > 0.05) -analysis of variance (ANOVA), Tukey's. Univariate and multivariate ANOVA showed a significant interaction between tooth loss and age (P < 0.05). Conclusion: Statistical analyses demonstrated no difference in the number of septa in relation to age, gender or the number of teeth in the posterior maxilla. Clinical relevanceAfter tooth loss, the posterior maxillary alveolar bone suffers intense resorption and pneumatization of the maxillary sinus. These events reduce the available volume of the bone conventional dental implants fixation. Several surgical techniques are used in accessing the sinus floor to increase the membrane and attach the implant. The presence of bony septa increases the risk of surgical complications and requires surgical experience from the professional. This article evaluated the frequency of septa in 300 computed tomography scans, correlating gender, age and presence or not of teeth. It was concluded that the frequency of the septa is high and no correlation was found.
Objective: Evaluate dental and skeletal changes resulting from the exclusive use of the cervical headgear for 15 ± 4 months in the treatment of patients with Class II division 1 malocclusion. Methods: Differences between the beginning (T1) and immediately after the end of the therapy (T2) with the cervical headgear in growing patients (Experimental Group, EG, n = 23) were examined and compared, during compatible periods, with those presented by a group of untreated individuals (Control Group, CG, n =22) with similar malocclusions and chronological age. The cephalometric variables evaluated were: ANB, GoGn.SN, AO-BO, S'-ANS, S'-A, S'-B, S'-Pog and S'-U6 (maxillary first molar). The Shapiro-Wilk and Levene tests were used to evaluate the results. Results: Significant differences were found relative to the ANB, S'-U6, AO-BO, S'-ANS, S'-A, S'-B and S'-Pog variables between T1 and T2 when comparing both groups. No statistically significant variation was found regarding the GoGn.SN angle. Conclusions: The use of cervical headgear promoted distal movement of the maxillary first molars and restricted the anterior displacement of the maxilla, without significantly affecting the GoGn.SN angle.
Introduction Extraoral strength is the most common strategy to correct Angle Class II malocclusion, restricting and redirecting the maxillary growth. Objective To evaluate the skeletal changes resulting from the use of headgear, with cervical and parietal anchorages, associated with a full fixed orthodontic appliance, in growing patients with Class II malocclusion (Angle) treated in the clinic of an orthodontic training center. Material and method The ages at the beginning and end of the treatment, anchorage type, and the values of some cephalometric variables were obtained from the clinical files. After applying the inclusion and exclusion criteria, 56 patient files were selected. Then, the sample was divided into two groups, according to the anchorage type: cervical (n=30) and parietal (n=26). The differences between the initial (T1) and final (T2) values of cephalometric measurements SNA, SNB, ANB, AO-BO, GoGn.SN and LHF (percentage of lower facial height to total facial height) were evaluated in both groups. Result Significant differences between T1 and T2 were found relative to SNB and ANB variables in both groups. The AO-BO variable presented a statistically significant difference only in the cervical group. The remaining variables did not show significant differences between T1 and T2. Conclusion The skeletal changes resulting from the use of cervical or parietal anchorage were very similar. There was a decrease in the sagittal discrepancy between the maxillary bones due to forward displacement of the mandible, without significant vertical changes.
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