It was concluded that the implants LS, HAB, and HABT presented physicochemical and topographical properties superior to those of AS and MS and favored the osseointegration process in the shorter periods. In addition, HAB showed the best results when compared with other surfaces.

The purpose of this study was to evaluate commercially pure titanium implant surfaces modified by laser beam (LS) and LS associated with sodium silicate (SS) deposition, and compare them with machined surface (MS) and dual acid-etching surfaces (AS) modified. Topographic characterization was performed by scanning electron microscopy-X-ray energy dispersive spectroscopy (SEM-EDX), and by mean roughness measurement before surgery. Thirty rabbits received 60 implants in their right and left tibias. One implant of each surface in each tibia. The implants were removed by reverse torque for vivo biomechanical analysis at 30, 60, and 90 days postoperative. In addition, the surface of the implants removed at 30 days postoperative was analyzed by SEM-EDX. The topographic characterization showed differences between the analyzed surfaces, and the mean roughness values of LS and SS were statistically higher than AS and MS. At 30 days, values removal torque LS and SS groups showed a statistically significant difference (p < 0.05) when compared with MS and AS. At 60 days, groups LS and SS showed statistically significant difference (p < 0.05) when compared with MS. At 90 days, only group SS presented statistically higher (p < 0.05) in comparison with MS. The authors can conclude that physical chemistry properties and topographical of LS and SS implants increases bone-implant interaction and provides higher degree of osseointegration when compared with MS and AS.

Biologic behavior of the bone tissue around implants with four different surfaces was evaluated. The surfaces were: modified by laser (LS); modified by laser with sodium silicate deposition (SS); and commercially available surfaces modified by acid etching (AS) and machined surface (MS). Topographic characterization of the surfaces was performed by scanning electron microscopy (SEM)- energy dispersive X-ray spectrometry (EDX) before experimental surgery. Thirty rabbits received 60 implants in their right and left tibias, 1 implant of each surface being placed in each tibia. The analyzed periods were 4, 8, and 12 weeks postoperatively. Histometric analysis was performed evaluating bone interface contact (BIC) and bone area (BA). The results obtained were submitted to the analysis of variance and the Tukey t-test. The elemental mapping was evaluated by means of SEM at 4 weeks postoperatively. The topographic characterization showed differences between the analyzed surfaces. Generally, the BIC and BA of LS and SS implants were statistically higher than those of AS and MS in most of the analyzed periods. Elemental mapping showed high peaks of calcium and phosphorous in all groups. Based on the present methodology, it may be concluded that experimental modifications LS and SS accelerated the stages of the bone tissue repair process around the implants, providing the highest degree of osseointegration.

The aim of this study was to analyze the stages of the alveolar bone repair in type 2 diabetic rats evaluating the mechanism of mineralization and bone remodeling processes after dental extraction. Forty-eight rats were divided into normoglycemic (NG) and type 2 diabetes (T2D) groups. The upper right incisor was extracted and after 3, 7, 14 and 42 days the animals were euthanized. The following analyses were performed: immunolabeling against antibodies TNFα, TGFβ, IL6, WNT, OCN and TRAP, collagen fibers maturation, microtomography and confocal microscopy. Data were submitted to statistical analysis. The immunolabeling analysis showed that the T2D presented a more pronounced alveolar inflammation than NG. Labeling of proteins responsible for bone formation and mineralization was higher in NG than T2D, which presented greater resorptive activity characterized by TRAP labeling. Also, T2D group showed a decrease in the amount of collagen fibers. Micro-CT analysis showed that T2D causes a decrease in bone volume percentage due to deficient trabecular parameters and higher porosity. The T2D bone dynamics show a loss in bone remodeling process. T2D prolongs the local inflammatory process, which impairs the organization and maturation of collagen fibers, delaying bone formation that generates impact on mineralization and bone turnover.

No abstract

The presence of IR in class III obese women can cause menstrual dysfunctions such as amenorrhoea or oligomenorrhoea even in the absence of hyperandrogenism, suggesting that IR plays an important role in the ovarian mechanisms involved in the menstrual cycle control.

ResumoAs fraturas nasais são as fraturas mais frequentes em face, esse fato ocorre devido a proeminência dos ossos próprios do nariz (OPN) em relação a face, que faz com que eles possam receber o primeiro impacto frente a um trauma. As fraturas nasais (FN) podem ter seu tratamento cirúrgico ou não, de acordo com a condição estética e também funcional do paciente. O presente trabalho tem como objetivo relatar um caso clínico de um paciente de 30 anos, sexo masculino, leucoderma, vítima de agressão física, admitido na Santa Casa de Misericórdia de Araçatuba relatando sangramento nasal abundante, dificuldade respiratória e dor em face. Ao exame clínico notou-se rinoescoliose significativa á direita e impermeabilidade das vias aéreas, e no exame de imagem por tomografia computadorizada observou fratura OPN envolvendo fratura e desvio de septo nasal. Pelas condições apresentadas no exame clínico e de imagem, foi proposto tratamento cirúrgico sob anestesia geral. A primeira etapa cirúrgica foi realizada com reposição dos fragmentos, seguida do tamponamento para sustentação com tamponamento, porém sem sucesso estéticos e funcionais. A segunda etapa cirúrgica foi realizada sob anestesia geral, com redução da fratura, do desvio de septo e tamponamento. No pós-operatório foi possível notar um resultado satisfatório funcional com patência das vias aéreas e também estético, quando comparado com imagens fotográficas do paciente prévias ao trauma. Descritores: Fraturas Ósseas; Fixação de Fratura; Traumatismos Faciais. AbstractNasal fractures are the most frequent fractures in the face, this fact occurs due to the prominence of the own bones of the nose (OPN) in relation to the face, which causes them to receive the first impact in front of a trauma. Nasal fractures (FN) may have their non-surgical or surgical treatment, according to the aesthetic and also functional condition of the patient. The present study aims to report a clinical case of a 30 year -old male patient, leucoderma, a victim of physical aggression, admitted to Santa Casa de Misericórdia de Araçatuba, reporting abundant nasal bleeding, respiratory distress and face pain. The clinical examination showed significant rhinosinusis on the right and airway impermeability. On the CT scan, an OPN fracture involving fracture and nasal septum deviation was observed. Under the conditions presented in the clinical and imaging examination, surgical treatment was proposed under general anesthesia. The first attempt was made with replacement of the fragments, followed by the buffering to support with buffering, but without aesthetic and functional success. A second attempt was performed under general anesthesia, with fracture reduction, septal deviation and tamponade. In the postoperative period, it was possible to notice a satisfactory functional result with patency of the airways and also aesthetic when compared to the patient's photographic images prior to the trauma. Descriptors: Fractures, Bone; Fracture Fixation; Facial Injuries. ResumenLas fracturas nasales son los fr...

Removal of the buccal fat pad (BFP) is an important topic of discussion in the literature. Several studies have reported improvements in facial esthetics as a result of this technique. The BFP is close to vital structures, such as the facial nerve, parotid duct, and vessels. Injuries related to these structures may occur during the surgical procedure. This manuscript aimed to report and discuss 2 clinical cases of the complications after removal of the BFP. Besides the case presentation, a comprehensive review of the literature was also provided. The reported cases were 2 patients aged 31 and 38 years who were attended by the oral and maxillofacial surgery teams after a complication in the BFP surgery. The first case involved swelling due to Stensen's duct injury, and the second involved uncontrolled bleeding from the internal maxillary artery. Removal of the BFP must have precise indications. Complications may occur during or after surgery; hence, anatomical knowledge is fundamental to appropriate patient management.