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It is concluded that, under this experimental condition, LLLT increased bone repair at early bone healing.

Tissue healing is a complex process that involves local and systemic responses. The use of Low Level Laser Therapy (LLLT) for wound healing has been shown to be effective in modulating both local and systemic response. Usually the healing process of bone is slower than that of soft tissues. The effects of LLLT on bone are still controversial as previous reports show different results. This paper reports recent observations on the effect of LLLT on bone healing. The amount of newly formed bone after 830nm laser irradiation of surgical wounds created in the femur of rats was evaluated morphometricaly. Forty Wistar rats were divided into four groups: group A (12 sessions, 4.8J/cm 2 per session, 28 days); group C (three sessions, 4.8J/cm 2 per session, seven days). Groups B and D acted as non-irradiated controls. Forty eight hours after the surgery, the defects of the laser groups were irradiated transcutaneously with a CW 40mW 830nm diode laser, (f~1mm) with a total dose of 4.8J/cm 2 . Irradiation was performed three times a week. Computerized morphometry showed a statistically significant difference between the areas of mineralized bone in groups C and D (p=0.017). There was no significant difference between groups A and B (28 days) (p=0.383). In a second investigation, we determined the effects of LLLT on bone healing after the insertion of implants. It is known that dental implants need four and six months period for fixation on the maxillae and on the mandible before receiving loading. Ten male and female dogs were divided into two groups of five animals that received the implant. Two animals of each group acted as controls. The animals were sacrificed 45 and 60 days after surgery. The animals were irradiated three times a week for two weeks in a contact mode with a CW 40mW 830nm diode laser, (f ~1mm) with a total dose per session of 4.8J/cm 2 and a dose per point of 1.2J/cm 2 . The results of the SEM study showed better bone healing after irradiation with the 830nm diode laser. These findings suggest that, under the experimental conditions of the investigation, the use of LLLT at 830nm significantly improves bone healing at early stages. It is concluded that LLLT may increase bone repair at early stages of healing.

O processo de construção de protótipos biomédicos surgiu da união das tecnologias de prototipagem rápida e do diagnóstico por imagens. No entanto, este processo é complexo, em função da necessária interação entre as ciências biomédicas e a engenharia. Para que bons resultados sejam obtidos, especial atenção deve ser dispensada à aquisição das imagens por tomografia computadorizada e à manipulação dessas imagens em softwares específicos. Este artigo apresenta a experiência multidisciplinar de um grupo de pesquisadores com a aquisição e a manipulação de imagens por tomografia computadorizada do complexo maxilofacial, visando à construção de protótipos biomédicos com finalidade cirúrgica.

This case report illustrates the relationship between trauma to a deciduous tooth and the consequences to the permanent dentition. The patient suffered an injury to the central incisors at the age of four with resultant pulpal necrosis. The permanent dentition was affected by displacement from its original position and a severe dilaceration at the crown/root junction.

Resumo: A espécie Bauhinia forficata pertence à família Fabaceae e é conhecida por seu uso medicinal e na arborização urbana. Objetivou-se com este trabalho verificar a qualidade de lotes de sementes de B. forficata por meio do envelhecimento acelerado e avaliar o desempenho de plântulas desenvolvidas em diferentes dimensões de tubetes e substratos. Para o teste de envelhecimento, as sementes de 3 lotes foram submetidas a condições de estresse a 41 °C e, aproximadamente, 100% de umidade relativa do ar. Os tratamentos foram compostos por diferentes tempos de exposição: 0 (T0), 24 (T1), 48 (T2), 72 (T3) e 96 h (T4) em delineamento inteiramente casualizado, em arranjo fatorial 3x5 (lotes x períodos). Em seguida, avaliouse a germinação, sementes duras e sementes mortas. As sementes do lote com maior qualidade fisiológica foram utilizadas para produção de mudas em tubetes de 2 dimensões (50 e 110 cm³) e 3 substratos [S1 = turfa fértil 100%, S2 = Tecnomax 100% e S3 = turfa fértil:vermiculita (1:1)] em delineamento em blocos ao acaso em arranjo fatorial 2x3 (tubetes x substratos). As variáveis analisadas foram: emergência aos 21, 28 e 35 dias, fitomassa verde e seca, diâmetro do colo e comprimento de plântula. Foi determinado o período de exposição de 72 h para estratificação dos lotes de sementes de B. forficata em níveis de vigor. Recomendase o uso de substrato comercial sem a adição de vermiculita, independentemente do tamanho do tubete, para produção de mudas da espécie.Palavras-chave: Períodos de estresse. Produção de mudas. Vigor. Abstract:Bauhinia forficata belongs to Fabaceae botanic family and is known because of its medicinal use and urban forestry. The objective of this research was to verify the samples quality of Bauhinia forficata seeds through accelerated aging test and evaluate the performance of seedlings grown in different containers size and on different substrates. For the accelerated aging test, seeds from 3 samples were submitted to stress conditions at 41 ° C and, approximately, 100% relative humidity. The treatments consisted of different exposure times to stress conditions: 0 (T0), 24 (T1), 48 (T2), 72 (T3) and 96 h (T4) through completely randomized design in a factorial arrangement 3x5 (samples x periods). After that, germination, hard seeds and dead seeds were evaluated. The seeds of the sample which have higher vigor, determined by accelerated aging test, were used to produce seedlings in two containers size (50 and 110 cm³) and 3 substrates [S1 = fertile turf 100%, S2 = Tecnomax 100 and S3 = % fertile turf: vermiculite (1:1)] with randomized complete blocks in a factorial arrangement 2x3 (containers x substrates). The variables analyzed were: emergency at 21, 28 and 35 days, fresh and dry weight, stem diameter and seedling length. It was determined the exposure period of 72 h for stratification of seeds samples of B. forficata on vigor levels. The use of commercial substrate without the addition of vermiculite to produce seedlings of the species is recommended, regardless of the containers...

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Anquiloglossia; Frênulo lingual curto; Frenulectomia; Frenulotomia.