The aim of this study was to investigate the effect of injectable PRF ( i-PRF) versus the autologous blood injection (ABI) in management of chronic recurrent temporomandibular joint (TMJ) dislocation. Patients and Methods: Thirty patients were participated in this study. They were randomly assigned to equalsized groups (group I injected by autologous blood while group II injected by i-PRF). MRIs of the patients were taken preoperatively, one, and three month after the injection. Also, a verbal scale expressing TMJ pain on palpation, maximal mouth opening (MMO), and frequency of luxation were assessed at the same intervals. Results: The results revealed that each treatment appeared to be effective for patients with recurrent TMJ dislocation. Improvement was greater in i-PRF group than those with AB group. Conclusion:It could be concluded that, each treatment seems to be effective for patients with chronic recurrent TMJ dislocation. Additionally, i-PRF treatment may be highly effective to manage and improve function of chronic recurrent dislocated TMJ compared with ABI .

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Background & Objective(s):There is limited published data on Egyptian oral epidemiologic health status especially among adolescents. This study aimed to evaluate oral health status and their associated variables among secondary school students in Assiut Governorate; Upper Egypt. Methods: : A cross sectional study was conducted on 872 students using a representative sample from public, private and technical secondary schools. Data were collected using a self-administered questionnaire including inquires about sociodemographic data, oral health behaviors and selfperception of oral health. Oral health was assessed by Decayed Missing Filled Teeth index (DMFT), Simplified Oral Hygiene Index (OHI-S), and Basic Periodontal Examination index (BPE). Results: Prevalence of oral health diseases was as follow; dental caries was 47.5%, gingivitis was 31%, while periodontitis was 15.7%. About 80% of the students owned a toothbrush; however 25% of them never perform teeth brushing. Unfavorable OHI-S score was significantly positively correlated with worse DMFT and BPE scores. Concurrently, BPE index was significantly positively correlated with DMFT index. Females had higher risk for unfavorable DMFT scores compared to males. Increased age, female gender, enrollment in technical schools, and bad/ unknown selfperception of oral health were significant predictors of worse periodontal scores. The significant predictors of worse oral hygienic scores were increased age, enrollment in technical schools, and bad/ unknown self-perception of oral health. Conclusion: Considerable proportions of students suffered from oral health disorders. Unfavorable oral health indices were related to female gender, technical school enrollment, increasing age and bad/unknown self-perception of oral health. Oral health indices are compatible with each other; where healthier oral hygiene condition is correlated with better dental and periodontal oral health statuses. Superior periodontal status is correlated with favorable dental condition.

Aim: This study was designed to evaluate the efficacy of 1% alendronate gel as an adjunctive therapy to scaling and root planing in the treatment of class II furcation defects. Subjects and method: Twenty-six patients with mandibular class II furcation involvement were selected from the out-patient clinic, Oral Medicine and

Aim: The clinical, 3D volumetric, and histological evaluation for effectiveness of addition of melatonin to β-tri calcium phosphate (β-TCP) in socket preservation after tooth extraction. Patients and methods: 24 patients were treatment planned for extraction of isolated hopeless mandibular teeth followed by delayed implant placement. They were divided randomly into two equal groups as follows: Group (A) sockets were grafted with β-TCP mixed with 1% melatonin, Group (B) included sockets were grafted with β-TCP alone. Clinical evaluation and Cone beam computed tomography (CBCT) were done immediately and 6 months postoperatively. Microscopic evaluation was performed after 6 months before implant insertion. All readings were recorded and analyzed statistically. Results: After 6 months, all clinical and radiographic parameters showed significant difference between the tested groups where Group (A) produced the highest mean values of bone density, bone height, and width followed by Group (B). Histological study referred to more maturation of bone in group A than group B. Where complete bone maturation occurred later in group II than group I. Conclusion: The results clearly concluded that melatonin had promotion effect for bone formation. Therefore, addition of melatonin to β-TCP has high successful effect in decrease bone resorption with increased bone density of alveolar ridge leading to preserve on 3-D volume of alveolar ridge after tooth extraction.

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