[Histological evaluation of micro implant-bone interface following immediate versus delayed loading in a dog's mandibular bone]

Skeletal anchorage devices such as microimplants are successful attempts to have absolute anchorage. The aim of this study was to evaluate the effect of immediate and delayed orthodontic loading on maxillary and mandibular microimplants regarding histologic responses and bone implant contact [BIC] in a dog. Thirthy-two microimplants [Abso Anchor] were bilaterally placed in the mandibular premolar regions of four adult male dogs. The microimplants were divided into loaded and unloaded [control] groups. The control group had two subgroups of 4 and 8 weeks and the loaded group comprised two subgroups of immediate and delayed [after 4 weeks healing period] loading. Loaded samples were subjected to 200g load provided by Ni-Ti coil spring for 4 weeks. The decalcified specimens were prepared for histological examination under light microscope. The microimplants' surrounding tissue was observed histologically and the bone implant contact [BIC] percentage was calculated in each sample. Three way ANOVA was used to compare BICs in different groups. Mobility was detected in two mandibular microimplants, so the survival rate was calculated as 93.7%. BIC values were not significantly different between loaded and unloaded groups, and between immediate and delayed loaded groups. Immediate or delayed loading of microimplants does not load to significant difference in the bone-microimplant contact

[Clinical evaluation of denuded root coverage with subepithelial connective tissue graft]

The purpose of this study was to investigate the amount of denuded root coverage using subepithelial connective tissue graft.12 patients [8 female and 4 male] between 22 and 43 years old with at least one tooth with gingival recession were selected. The following parameters were measured for each tooth: 1 .Gingival level to CEJ height. 2-Gingival level to the reference point height 3. Recession width in CEJ. 4. pocket depth 5.The amount ofkeratinized gingiva. Gingival graft surgery was done with the Langer and Langer technique. The parameters were measured at baseline and one, two and three months after surgery. Statistical analysis was performed using ANOVA and correlation coefficient. The results revealed that our procedure was successful in 75% of cases in root coverage of greater than. 1.7 mm and in about 92% of cases in increasing the width ofkeratinized gingiva more than 2 mm. Subepthelial connective tissue graft procedure could be used successfully in treating denuded roots

[Evaluation of oral hygiene and periodontal status in hemodialytic children of mashhad Dr. Sheikh hospital]

The purpose of this research was to determine the status of oral and gingival hygiene of dialytic patients [case group] in comparison with healthy children [control group]. The two groups which consisted 19 hemodialytic patients aged between 5-16 years old from the Dr. Sheikh hospital as case group and 19 patients of the dental school as control group, were examined. These two groups were matched according to age, sex and status of tooth-brushing. In both groups, there were 10 girls and 9 boys, 7 aged between 5-10 years and 12 aged between 11-16 years. In both groups the Gingival Index, Debries Index, simplified Calculus Index and oral Hygiene Index were examined. Mann-whitney and kruskal-walis test were used for statistical analysis. Evaluation of the indices mentioned above showed that the DI-S and GI were Significantly higher in Case group than Control group. But there was not any Significant differences between the 2 group in OHI-S and Cl-S. Assesment of the indices according to the age in the case group, displayed that CI-S was higher in patients aged 16 years old. Among the hemodialytic patients, plaque formation and the resultant amount of gingivitis was increased