L-PRF: A “Super” Biomaterial for Naturally Guided Hard/Soft Tissue Bioengineering and Regeneration of Oro-Dental, Periodontal and Jaw Defects

Leukocyte and platelet-rich fibrin (L-PRF) is a 3-D autogenous biomaterial derived via simple and rapid centrifugation of whole blood patient samples, in the absence of anti-coagulants, bovine thrombin, additives or any gelifying agents. A relatively new “revolutionary” step in second generation platelet concentrate-based therapeutics, clinical effectiveness of L-PRF remains highly-debatable, whether due to preparation protocol variability, limited evidence-based clinical literature and/or inadequate understanding of its biocomponents. This critical review provides an update on the application of L-PRF during oral surgery procedures, in human Randomized and Controlled Clinical Trials only (up to February 2016). Accordingly, autologous L-PRF is often associated with early bone formation and maturation; accelerated soft-tissue healing; and reduced post-surgical pain and discomfort. L-PRF is a simple, malleable and safe biomaterial suitable for use in oral surgery. An innovative tool in Regenerative Dentistry, L-PRF is a strong alternative and possibly cost-effective biomaterial for oral-tissue regeneration. Preparation protocols require revision and standardization. Furthermore, a good analysis of its rheological properties, biocomponents and their bioactive function would enhance the validity, comprehension and therapeutic potential of the reported findings or observations; a step closer towards a new era of “super” dental biomaterials and bioscaffolds

Salud Oro-Dental y Diabetes Tipo 2 Mellitus.

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nanoBONE: revisando la reconstrucción y reparación ósea… con un nanoGiro.

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Applicability of the theory of planned behavior in predicting intended use of Voluntary HIV Counseling and Testing services among teachers of Harari Region, Ethiopia

Background: The predictive validity and applicability of Theory of Planned Behavior (TPB) may be a promising model for understanding and predicting intended behaviors to use VCT services. The need for theory based study would thus be essential in designing evidence based HIV-related interventions in the future. Objectives: To examine the applicability of the Theory of Planned Behavior and the additional predictive role of perceived risk in predicting intended use of Voluntary HIV Counseling and Testing (VCT) services. Methods: A cross sectional study design was conducted among 20 randomly selected schools in Harari Region between March and April 2009. Four hundred ninety seven randomly selected teachers consented to participate in the study giving a response rate of 87.8%. Self administered questionnaire, adopted from the TPB was used for data collection. Multiple linear regression models were used to predict the role of important variables that can influence the intention to use VCT among teachers using SPSS version 15.Result: More than half (53.7%) who had never used VCT service were considered in the analysis for the intended VCT service use. All the modal variables correlated significantly with behavioral intention. Subjective norm (r=0.45,

VCT uptake and associated factors among teachers from Harari Administrative Region

sector which is vital to the creation of human capital is also equally affected. The loss of skilled and experienced teachers due to the problem is increasingly compromising the provision of quality education in most African countries and thus, needs appropriate intervention measures that reverse the current trend. Objectives: To assess the prevalence and determining factors of VCT uptake among teachers of Harari Administrative Region. Methods: A cross sectional study design with analytic component was conducted among 566 teachers drawn from 20 randomly selected schools of Harari Administrative Region from March to April 2009. Self administered questionnaire, adapted from previous relevant studies was used to estimate the prevalence of VCT uptake and the various socio-demographic and psychological factors. Data were entered and analyzed using bi-variate and multivariate models. Results: A total number of 497 teachers responded to the questionnaire adequately making the response rate of 87.8%. The mean age of the participants was 34.68 ranging from 18 – 61 years. There were more teachers from urban areas (72.0%) and most of them were males (62.2%). About half (54.1%) were married and few (5.2%) were divorced. The vast majority (98.6%) heard about the confidential VCT service and their major sources of information were mass media (85.3%) and health workers (56.2%). The prevalence of VCT uptake was 46.3%. The odds of utilizing VCT significantly increased with being younger age group, female and first and second cycle teachers’category. Conclusions: The major factors identified for increased uptake of VCT are gender, age and salary category. Actions targeting the males, non-youth age group and low grade teachers’ are necessary to follow their peer groups to utilize the VCT service in order to achieve the goal of education set for 2015

Analisis Kerusakan Proses Plating Part Fork Pipe

Nickel hard chrome plating merupakan teknik pelapisan dengan menggunakan dua jenis pelapisan yaitu nickel plating dan hard chrome plating. Teknik pelapisan ini akan menghasilkan daya tahan terhadapat karat ataupun keausan yang lebih baik. Tujuan dari penelitian ini adalah untuk menganalisis mekanisme cacat pada permukaan fork pipe serta memberikan rekomendasi untuk mengurangi timbulnya cacat. Penelitian ini menggunakan 30 sampel fork pipe yang mengalami cacat pada saat proses nickel hard chrome plating. Metodologi penelitian yang digunakan yaitu dengan melakukan pengujian SEM (Scanning Electron Microscope) dan EDS (Energy Dispersive X-Ray Spectroscopy). SEM digunakan untuk mengetahui bentuk dari cacat dan pengotor yang ada, sedangkan EDS untuk mengetahui kandungan apa yang menjadi penyebab timbulnya cacat. Hasil penelitian menggunakan SEM dan EDS menunjukkan bahwa terdapat empat macam penyebab timbulnya cacat yaitu pengotor nikel, pengotor ferro, pengotor krom, dan base metal itu sendiri. Dari keseluruhan hasil, kemungkinan besar untuk pengotor ferro dan krom terdapat dalam lapisan semi bright nickel. Bentuk cacat yang dihasilkan dari masing masing pengotor terdapat kecenderugan dan memiliki range ukuran tertent