Anchorage evaluation of dental implants irradiated with GaAIAs laser (830nm)

The aim of the present study was to evaluate titanium implants fixed with free rotation in rabbit's tibia and irradiatedwith GaAlAs laser (4.3Joules/daily, 830nm wavelength, 12mW and 51 seconds) using a digital torquimeter. Thirty malerabbits were divided into two groups (Laser and Control) and subdivided according to their death day 15 (L1 and C1), 30(L2 and C2) and 45 (L3 and C3) after surgery. A digital torquimeter evaluated the torque needed for removing theimplants, breaking their union to the bone. The results were submitted to Student's "t" test and ANOVA test, in order tovalidate these findings. It was observed an increase on removal torque values of irradiated implants both with 15 and 30days after surgery, in comparison to control groups. With 45 days, there was no statistically significant difference between theLaser and Control groups values. It was concluded that Laser group showed a higher value in the removal torque whencompared to non-irradiated implants

Prevalence of morphological and structural changes in the stylohyoid chain

Total or partial calcification of the stylohyoid chain, elongation of the stylohyoid process of the temporal bone and/or calcification of the stylohyoid ligament are usually incidental radiographic findings. The purpose of this study was to evaluate the prevalence of morphological and structural changes within the stylohyoid chain in 4413 digital panoramic radiographs. The images were evaluated for the presence or absence of changes in the stylohyoid chain by a specialist in dentofacial radiology and the information collected comprised gender, age, side, right and left measurements and classification of the chain side elongated or calcified stylohyoid process, as well as type and pattern of right or left calcification. 275 (6.2%) subjects presented alterations, mostly bilateral, in the stylohyoid chain, being 186 females (67.6%) and 89 males (32.4%), with a higher proportion elongation. Partial calcification was more prevalent than total calcification. The right side was most affected and the frequency of events increased with age. The findings of the present study demonstrate that the commonest alterations in the stylohyoid chain are bilateral, mainly elongation, with a clear trend to increased prevalence with increasing age, presenting a low incidence. Noneless, the clinicians must be aware of these alterations in the routinely radiographic examination

Proposta de contenção mista em fraturas mandibulares

The selection of the technique for mandibular fractures fixation, when there is the involvement of any alveolarfragment, should comply some requirements for the osteosyntesis systems and should be aware for the radicularstructures maintenance. It's proposed in this article, a mixed for mandibular fractures when it's involved alveolarfragments

A percepção do belo e a proporção divina

The aesthetic knowledge concerning the face one is widely important for the professionals of the Dentistry area and, moreover, it is of interest of the people of a general form. It has a trend, while professional, of if imposing the aesthetic values when really can be to observe the values of the proper individual. Many are the studies that present, of clear form, the differences between the individuals, as patient or people independent, how to its preferences, if compared with the ideas of beauty of the professionals of different areas. Being thus, objective in this chapter to integrate the reader to the presentation of the aesthetic one, not only in the scientific aspect, as measurable and quantitative object, as also in the artistic and social aspect. How to the beauty, the perception that if has of the things in day-by-day is basically utilitarian and conceptual. It has a bigger trend in if to perceive the things by means of the concepts proceeding from the language of the one that really eat is capable to sensitize our directions. However, it fits to remember that the language classifies and appraises the feelings, but is extremely impotent to describe them. It must always be had in mind that is in the sensible one - and not in the conceptual one, in the intellectual - that inhabits the being of the aesthetic object

The importance of the posterior joint space for functional mandibular movements : a laboratory cross-sectional study

The search for the ideal, healthy and reproducible position of the condyles is of utmost importance for dental diagnosis and treatment. Thus, the objective of this laboratory cross-sectional study was to verify the relationship between the posterior joint space and the mandibular lateral movements. Dental casts from 15 women and 15 men with normal mastication, 28 natural teeth and no history of temporomandibular disorders or pain, were fabricated and mounted on a fully adjustable articulator. From the maximum intercuspal position, condylar displacement was evaluated and measured on the working and nonworking sides during mandibular lateral movement, both to the right and left sides. The correlation between the measures of interest was assessed with the Pearson correlation coefficient (?=.05). Condylar displacement on the working side and nonworking side condyle was 0.88±0.71 mm and 3.57±1.11 mm (right mandibular lateral movement); and 0.91±0.58 mm and 3.51±0.78mm (left mandibular lateral movement), respectively. No significant correlation in the condylar displacement between the working side condyles on the right and on the left sides was observed (r=.22; P=.248). The condylar poles of the articulator moved posteriorly, simulating the functional movements of the mandible during mastication. In all cases, condylar displacement during mandibular lateral movement both to the right and left occurred posteriorly on the working side condyle. The condylar poles of the articulator moved posteriorly simulating the functional movements of the mandible during mastication. Moreover, left and right working condyles may require slightly different spaces to function, suggesting minor anatomical asymmetries

Ultrasonic tips in periradicular surgery

Technological advances have increased the rate of success of dental procedures. In periradicular surgery, the use of ultrasonictips ensures high-quality root-end cavity preparations, enables the performance of a 90-degree apicoectomy, and removeslarger amounts of contaminated material. The authors reviewed in vitro and in vivo studies in the literature andevaluated root-end cavities prepared with burs or ultrasonic tips using scanning electron microscopy

Lateral window technique: a focus review

The posterior alveolar bone region of the maxilla has, in more than 40% of the cases, a height inferior to 4 mm, thus making rehabilitation with implants a clinical challenge. This focus literature review was carried out through an exhaustive literature search in PubMed, ScienceDirect, LILACS, Web of Science, Scielo and Cochrane Library. The aim was to illustrate and analyse various factors that should be accounted for while applying the maxillary sinus elevation technique. The lateral osteotomy technique is carefully described including its indications, complications, contraindications, as well as, different factors to take into account, such as the use of electric piezo, graft materials, membranes and the expected success rates.publishe

Advantages of porcine xenograft over autograft in sinus lift: a randomised clinical trial

This study aimed to compare the performance of intra-oral autologous bone grafts versus porcine xenografts in a two-step lateral window sinus lift. This split-mouth randomised controlled trial sequentially enrolled 12 patients with a 6-month follow-up. For each patient, a simultaneous randomised bilateral maxillary sinus lift was performed and filled with autologous bone from the mandible (control) or a porcine xenograft (test). A bone biopsy sample was collected during the implant placement for histological and histomorphometric analysis. CT scans were performed at the beginning and at the end of the trial to assess radiological evolution. A comparison of initial and six-month CT scans indicated statistically significant increases in bone level for both materials (7.8 ± 2.4 mm for autologous and 8.7 ± 2.2 mm for xenograft, p < 0.05), and there were no significant differences between the performance of the two materials over time (p = 0.26). The histological analysis showed various stages of the remodelling process and no cells or other signs of inflammation or infection were visible in both groups. The porcine xenografts presented similar results for the studied variables when compared to autologous bone, being a reasonable alternative for a sinus lift.publishe

Orbital floor reconstruction with high density polyethylene

Surgical interventions in blow out fractures are generally indicated in cases of alterations in orbital function (e.g. diplopia)and for aesthetic reasons (e.g. enophthalmos). In assessing the severity of the injury, the clinician often uses parameterssuch as changes in visual acuity, patient-reported diplopia, changes in globe position and evaluation of the extraocularmuscles in association with imaging exams. Computed tomography has been the modality of choice for detailed imagingdiagnosis and surgical planning of orbital trauma. High density polyethylene may be successfully used in orbital floorreconstruction to restore function and esthetics. Taking into account the follow up of six months, the availability and theadvantages of high density polyethylene implants, it can be concluded that their use in reconstruction of orbital floordefects is a good choice