Heat polymerized poly methyl methacrylate is the most commonly used denture base material. Selecting a denture cleanser, compatibility between various type of denture base material and cleanser must be considered to avoid harmful effects. Study objective was to evaluate the changes in flexural strength and colour change of heat cured denture base resins when treated using denture cleansers. Method: The disk shaped specimens15mm in diameter and 4mm in thickness and rectangular shaped specimens 65mm x 10mm x 3.3mm were fabricated using split mould technique. A total of 60 standardized specimens were fabricated and stored in distilled water for 24hrs. After 1 day, the specimens were appropriately labelled and immersed in groups of 20 to prepared denture cleanser solutions for treatment. Solutions were prepared and immersed according to manufactures instructions (Corega tab: one tablet to 200ml of water and immersion time is 15min; Fitty dent: one tablet to 200ml of water and immersion time is 30min). After immersion, the resin specimens will be removed, thoroughly cleanedunder running water, dried with absorbent paper, and then the procedure of immersion will be repeated. This procedure will be performed for a total of 30 times over a period of 6 days simulating patients180 days of cleansing. 10 specimens of each group where tested for flexural strength using universal testing machine. Specimens were loaded until fracture occurred. The peak load was recorded in Newton and the flexural strength was calculated from peak load and another 10 specimens were tested for colour change using spectrophotometer .The specimens were tested on the measuring head of the spectrophotometer. The colour characteristics, tristimulus values X, Y, Z, and CIE (Lab) of specimens, were evaluated. The findings were statistically analysed using ONE -WAY ANOVA and students T test. Results: Heat cure denture base resin used for this study showed significant difference in flexural strength and.....

Aim: To evaluate various dental radiographic examination techniques carried out among insured population. Material and method: This was a retrospective study performed among patients reported to Department of Dentistry, ESIC Medical College, Hyderabad during a two year period from January 2017 to December 2018. Records of 11,535 patients who required radiographic investigations like intraoral periapical radiograph (IOPAR), Orthopantamogram (OPG), Computerized Tomogram (CT) and Cone beam computerized tomogram (CBCT) for diagnosis and treatment planning were analyzed. Results: Among the 11,535 patients, a total of 9,193 IOPAR, 1936 OPG, 348 CT, and 58 CBCT were taken. Among IOPAR, 6164 (67.05%) were advised to diagnose dental caries, 1514 (16.47%) for periodontal disease, and 636 (6.92%) for dental trauma. Regarding OPG, 485(25.05%) were advised to diagnose maxillofacial trauma, 338(17.46%) for periodontal disease, and 224 (11.57%).With regards to CT, 308(88.51%) were advised to diagnose maxillofacial trauma and 40(11.5%) were advised for Cysts and Tumours. In 58 instances where CBCT was advised 47(81.04%) were advised to diagnose Cysts and Tumours and 11(18.96%) were advised for maxillofacial trauma. Conclusion: About 17.07% (11,535 out of 67,551) of the Out-patients required radiological investigations. Among them IOPAR was most commonly advised while the least was CBCT. IOPAR was gold standard for Dental caries and its sequel, and for periodontitis. OPG was ideal for multiple teeth lesions; however had the drawback of ghost images. CT gives a good 3D view but has high radiation exposure and is expensive. CBCT is advanced and gave realistic anatomical picture with comparatively less radiation. However, its availability and standing posture are the drawbacks.

Backgrounds and objectives: Recently, a particular importance has been attributed to the receive of the Covid-19 vaccine in order to hope minimizing the spread of the pandemic and to reduce the very high mortality rate especially lately with the appearance of the Delta variant, however, a very large part of the population still hesitate for fear of the probable side effects falsely reported by the social media, among these risks, the contraindication of local or regional dental anesthesia after Covid-19 vaccination because of potentially fatal complications, until proven otherwise, this rumor remains false but threatens however a good progression of the vaccination, the objective of this research is to evaluate the safety of the realization of a dental local or regional anesthesia after the Covid-19 vaccination. Methods: This study was conducted on 288 patients, the control of 140 patients was done by a complete medical examination while the health status of 148 patients was assessed by a telephonic interview, the participating patients must present their vaccination’s proof with a date of vaccination that does not exceed one week before their dental care or surgical procedures requiring local anesthesia, 252 of these studied patients consulted having their first dose of the vaccine while only 36 patients who received the second dose, pregnant women are excluded from the study, only complications of local or regional anesthesia related to the three vaccines Sinovac, Sputnik V and AstraZeneca were studied because they are the only three vaccines available in Algeria, this research excludes the study of possible complications of general anesthesia in relation to the vaccines Covid-19, complications and side effects were sought within one week of the administration of local or regional anesthesia, beyond one week, the participant was excluded because of the possibility that other origins might distort the study. Results: No deaths, no particular complications .......