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Introduction: Dental implants are the choice of treatment for missing teeth. Despite the very good results, implant treatment is also associated with some failures and complications. The aim of this study was evaluation of survival rate and tissue health indexes around the Dio® SM dental implants placed in patients of dental school and a private office in Isfahan from 2005 until 2010. Methods: In this cross sectional study, 94 Dio® SM dental implants in 72 patients via convenience sampling were selected. After that demographic information and Gingival index, Gingival Bleeding index around Dio SM implants, plaque index, pocket depth, Bone loss were fulfilled for patients. Data analyzed using t-test, Chi-square test, Wilcoxon and Pearson test with SPSS Ver. 20 statistical software, at α =0.05. Results: Among 94 implants, 55.6 % in maxilla, 44.4% in the mandible, 53.19% single and 46.81% were multi-unit. Survival rate of total implants was 80.6% and 19.4% were failed because of different causes. Among indices Gingival index(p=0/001), plaque index(p=0/020),pocket depth(p

Introduction: Considering the ever-increasing growth of smoking and its various complications, including dental and osseous problems, and considering the importance of bone in the dental implant, it seems research is needed to determine the rate and magnitude of the effects of cigarette smoking on dental implants. Given various reports from various works, the present study was undertaken to evaluate the effect of cigarette smoking on the resorption of the crest of the alveolar bone around implants. Materials & Methods: In this retrospective cohort study, the patient's data were recorded in two groups, who were cigarette smoker and non-smokers. Twenty-five patients were randomly selected from each group. The subjects underwent panoramic radiographic examinations and the amount of bone loss was determined using the initial panoramic radiograph. Data were analyzed with descriptive statistical methods such as percentages and t-test using SPSS 22 (α = 0.05). Results: The majority of the subjects were 40-45 years of age. Data showed no significant difference in the means of changes in the alveolar crest between the two groups (p value = 0.443). In addition, the results showed no significant difference between the mean values of alveolar crest changes between males and females (p value = 0.891). Conclusion: The present study showed that the rate of the alveolar bone crest height in smokers was greater than that in non-smokers; however, the difference was not statistically significant. [ABSTRACT FROM AUTHOR]

Background & Objective: One of the most serious health problems is osteoporosis and it is mandatory to find preventive methods to confront this difficulty. Non-pharmacological methods are in priority due to less side effects. This study investigated the effect of treadmill running exercise on bone microarchitectures in female osteoporotic rats induced by ovariectomy. Materials & Methods: 30 rats were randomly divided into three groups of control, experimental one, and experimental two. Control and Experimental one (Ovariectomized) groups were kept in control conditions. The Experimental group two was subjected to 10 weeks treadmill running exercise from the 12th- post operative week. The animals were weighted in all the stages of the protocol. Finally, all rats were sacrificed and their femoral bones were removed for bone strength and bone microarchitectures analysis by using One-Way ANOVA test. The Repeated Measure was used to analyze the weight changes during the study. Results: The results showed that despite the same initial weight among groups (P=0.31), weight increased significantly in 12th and 22th postoperative weeks (P

Introduction: Dental caries and periodontal disease are probably the most common oral chronic diseases in worldwide, and their prevalence is progressively increasing from day to day. Therefore, this study was conducted to investigate the relationship between caries and periodontal disease. Methods: In this cross sectional study, 237 panoramic radiographies of patients aged 10 to 65 years (110males and 127 females) were selected utilizing convenience sampling. In order to measure the variables, a graduate caliper with 0/2 mm accuracy and Negatoscope with optimum light were used. Moreover, in order to diagnose the caries and minimize the errors, “calibration” method was selected. Results: There was no significant relationship between crown caries and mean of alveolar bone loss. (p=0/19). As the age increased in patients, the mean of alveolar bone loss also increased and a significant association was detected between the severity of caries, alveolar bone loss and male gender. Conclusion: Generally, no relationship was observed between dental caries and periodontal disease in this study.

Background and Objective: Radiographic examination has an important role in diagnosis and treatment of periodontal patients, so this study was performed to determine the accuracy of digital bite wing (CMOS) radiography in alveolar bone resorption. Materials and Methods: This cross-sectional study was performed on 61 teeth of 16 periodontal patients referred to the periodontoloy department of Rafsanjan Faculty of Dentistry. The patients were selected using available sampling. The patients were examined by a periodontist and the distance of Cemento Enamel Junction (CEJ) to the alveolar crest, after injection if needed, was measured by William's periodontal probe with accuracy of 1 mm, in mesial and distal surfaces of the premolars and first molars. Then digital bite wing radiography was taken from the patients and the mentioned distance was determined by CMOS linear software analysis program by an oral radiologist. Data were analyzed using paired t- test and simple linear regression. Results: The results showed that the mean of alveolar bone resorption (mm) in CMOS radiography is significantly less than clinical examination (p<0.001). By simple linear regression model, the mean of alveolar bone resorption (mm) in clinical examination, is predictable from the amount of alveolar bone resorption on CMOS radiography with accuracy of more than 99%. Conclusion: Digital bite wing radiography (CMOS) measures the mean of interproximal alveolar bone resorption in posterior teeth less than clinical examination, but regarding the high accuracy of CMOS radiography measures (more than 99%) in predicting probe depth, it might be possible to apply this radiography in detecting the interdental alveolar bone loss of posterior teeth. [ABSTRACT FROM AUTHOR]

Statement of Problem: In spite of the limitations of Radiography, diagnosing of periodontal diseases without having accurate radiographs is inadequate because it provides a visible image of the supporting bone to the clinician and works as a fixed measure of the supporting bone during the study.Purpose: The aim of this study is to compare the precision of preiapical, bitewings and panoramicradiographs in determining the distance between the alveolar crest (AC) and cementoenamel junction (CEJ) of teeth. Materials and Methods: Statistically this is a survey study in which 120 interproximal surfaces of teeth were measured during surgery by periodontal probing and recorded as the actual measurement. Then 40 sites underwent bitewing, 40 sites preapical and 40 others panoramic radiography and the distance of CEJ up to the alveolar crest of bone was measured on them by periodontal probe and recorded. Then each group was analyzed separately and the Pearson's correlation coefficient was examined for the data.Results: The results of this study showed that when the thickness of the remaining bone in a millimeter limit is important for (he surgeon, the bitewing radiography has a prime importance, but when bone loss ismoderate, the panoramic radiography showing %89 of the cases close to the actual measure, can be acceptable. On the other hand, in anterior sites for determining the bone alteration, preiapical radiography with a 0.93 correlation coefficient is superior to the panoramic radiography with a correlation coefficient of 0.72 and we suggest it for examining the changes of bone in these sites. Conclusion: whenever the bone alteration is moderate or severe, it seems that, bitewing radiography is of particular importance, but when the bone loss is little, panoramic radiography can be used and there is no needto put the patient on unnecessary radiation.

Background & Objective: One of the most serious health problems is osteoporosis and it is mandatory to find preventive methods to confront this difficulty. Non-pharmacological methods are in priority due to less side effects. This study investigated the effect of treadmill running exercise on bone microarchitectures in female osteoporotic rats induced by ovariectomy. Materials & Methods: 30 rats were randomly divided into three groups of control, experimental one, and experimental two. Control and Experimental one (Ovariectomized) groups were kept in control conditions. The Experimental group two was subjected to 10 weeks treadmill running exercise from the 12th- post operative week. The animals were weighted in all the stages of the protocol. Finally, all rats were sacrificed and their femoral bones were removed for bone strength and bone microarchitectures analysis by using One-Way ANOVA test. The Repeated Measure was used to analyze the weight changes during the study. Results: The results showed that despite the same initial weight among groups (P=0.31), weight increased significantly in 12th and 22th postoperative weeks (P<0.001). Ovariectomy induced a significant decrease in Trabecular Thickness (TT) and Cortical Thickness (CT) (P<0.001). It also induced a weakened femoral bone strength (P=0.003). The levels of TT, CT, and bone strength increased in experimental group two compared to experimental group one and Trabecular Separation (TS) decreased, either (P<0.001). Conclusion: The results indicated that a moderate intensity treadmill running exercise has a protective effect on osteoporotic bones. [ABSTRACT FROM AUTHOR]