A 10-year-old male Drahthaar dog with unilateral cryptorchidism was examined because of feminisation and myelotoxicity. Radiography and ultrasonography revealed an abdominal mass which was surgically removed. The mass was identified as a Sertoli cell tumour on histological examination. Findings on bone marrow examination were compatible with aplasia due to the oestrogens secreted by the tumoral cells. Treatment with fluids, antibiotics, whole blood transfusions, corticosteroids and lithium carbonate was unsuccessful. Survival time was 22 days after surgery.

The higher prevalence of dental anomalies, especially number anomalies, opposite the cleft area, in individuals born with cleft lip and/or palate is the most common associated dental anomaly outside the cleft area.

The aim of this study was to compare the effectiveness of high speed (HS) and air abrasion (AA) instruments on groups of teeth (deciduous, permanent, bovine), in terms of preparation time, topography and presence of smear layer. Each group consisted of 5 teeth that had their buccal/lingual surfaces prepared by using either HS or AA. All procedures were standardized and timed. The teeth were then sectioned and prepared for evaluation of both the topography and the presence of smear layer by scanning electron microscopy. As regards preparation time, HS yielded preparations 1.5 times quicker than AA did on the three types of dental substrates (Wilcoxon test, p < 0.05). In both techniques (KruskalWallis Test, p < 0.05) the preparation time was influenced by the dental substrate, particularly in deciduous teeth (Mann-Whitney test with Bonferoni's correction, p < 0.017), which required a longer preparation time.In the descriptive analysis of the topography, no difference was found between the substrates. Nonetheless, the different instruments used determined distinctive topographies. Both techniques produced a smear layer (χ 2 McNemar, p > 0.05) in all substrates, but with different formations. In conclusion, the HS instrument was found to be more rapid than the AA. No difference was found between the three dental substrates as regards both the topography and the presence of smear layer. The differences found in the present study were only in relation to the effects of each instrument used.

A fissura labiopalatal é uma das anomalias congênitas mais frequentes no ser humano, capaz de comprometer o lábio e/ou palato de forma completa ou incompleta. Sua etiologia não é totalmente conhecida, no entanto, é considerada multifatorial, com envolvimento de fatores genéticos e ambientais. Inúmeras alterações sistêmicas decorrentes dessa malformação são encontradas nestes indivíduos. Além disso, a fala, a estética e a posição dos dentes normalmente estão afetados. Sabe-se que uma alta prevalência de anomalias dentárias, como, por exemplo, agenesias, microdontias, dentes supranumerários e hipoplasias são achados comuns na cavidade bucal destes indivíduos. O objetivo deste trabalho é apresentar uma revisão de literatura sobre as anomalias dentárias mais frequentemente observadas em pacientes portadores de fissuras labiopalatais e destacar a importância do diagnóstico precoce realizado pelo cirurgião-dentista no decorrer do tratamento desses pacientes.

In view of the methodology employed, it may be concluded that cavity preparation with a CVD point in a US abrasion system led to the formation of fewer striae and both devices promoted the marked presence of a smear layer, obstructing dentinal tubuli.

Williams syndrome (WS) is a multisystem, congenital and panethnic disorder characterized by developmental and physical abnormalities. Developmental abnormalities in dentition are frequently observed in various patients with craniofacial syndromes, however there are a few reports regarding dental management in patients with WS. The aim of the present report is to describe the case of a 6-year-old child with characteristic facial features of WS with remarkable orofacial findings and the ensuing dental management. An intraoral examination revealed a mixed dentition period, with tooth agenesis and caries requiring treatment such as extraction, restoration and fluoride application. The dental treatment was carried out under local anesthesia and was completed successfully. Since then clinical and radiographic evaluations have been conducted periodically.

The aim of this study was to determine the action of desensitizing materials on bovine dentin. Four extracted healthy bovine molars were selected out of which 5 blocks from cervical region of each tooth were obtained, resulting in a 5x5mm final area. To compose the negative control group (group B), the samples were separated and not submitted to any treatment. For the positive control (Group A) the blocks were treated with 37% phosphoric acid. For allow to use the same dentin samples for all groups (2 controls and 3 test group), the experiment group contained twelve dentin surface blocks divided in 5 groups (n=4 in each group), as manufacturers' recommendations, there were used: Dessensibilize KF 2%-5% Potassium nitrate and 2% sodium fluoride (C); Fluoride Gel-2% sodium fluoride (D), Colgate Sensitive Pró-Alívio ® Arginine 8% (E) and Calcium carbonate-based toothpaste (F). The samples were analyzed in Scanning Electron Microscopy (SEM) and used the ANOVA and Tukey tests (p<005). The number and diameters of dentinal tubules were compared across the various groups. The samples from group E had a higher quantity of deposits on the peritubular and intertubular dentin with most closed tubules. Although, the groups A and B presented more opened dentinal tubules. However, only A has deposited a substratum from the reaction with desensitizing materials on the peritubular and intertubular dentin indicating same closed tubules. The analysis of the diameters of the tubules showed significant differences in groups B and C when compared to the other groups. Research suggests that arginine, a natural amino acid found on the saliva, together with calcium carbonate, positively charged at physiological pH, are bound to the dentin surface, negatively charged, and help forming a calcium-rich layer on the dentin surface and within the dentinal tubules, sealing them. The arginine causes the occlusion of the dentinal tubules and, theoretically, such occlusion remains intact even after exposure to acids [10]. Therefore, the purpose of this study was to test, in vitro, the action of several desensitizing materials in bovine dentin, verifying its effectiveness in obliterating the dentinal tubules. Material and Methods The study were laboratorial, in vitro one with convenience sample. The products used were select among the most used by dental sensitivity and the bovine dentin by human similarity. Material selection Three products for professional use with a known desensitizing action have been tested. Product 1: Dessensibilize KF 2%-5% Potassium nitrate and 2% sodium fluoride (FGM) Product 2: Flutop Gel Neutro-2% sodium fluoride (SSWhite) Product 3: Colgate Sensitive Pró-Alívio ® Arginine-(8%) and Calcium carbonate-based toothpaste (Colgate) Sample preparation and experimentation This study used three experimental group and two controls (positive and negative one). The objective were the dentin substrate of the same tooth had be used in all groups to avoid a sample bias,

rarely, deciduous teeth 10). Dens evaginatus and dens invaginatus occur normally alone, but can be associated with other dental anomalies, such as tooth agenesis, supernumerary teeth and microdontic incisors 11). No reports in the literature could be found of a case of