[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

[ evaluation of biologic width reconstruction after applying the tow methods of periodontal surgery]

The biologic width is invaded by different factors, among them, the periodontal surgery could be mentioned, especially when accompanied by bone contouring. The aim of this study was to determine the changes of alveolar crest which participate in the reconstruction of biologic width after applying two methods of periodontal surgery.20 patients were selected from the special clinic of Mashhad Dental School and after initial therapy, the surgical treatment were performed by a single operator. Since the study technique was cross over with split mouth design, at one side apically positioned flap [APF] with bone exposure and at the opposite side the APF without bone exposure were perfomed. The distance between CEJ to bone crest was determined. After two months the patients were examined for the same parameters by sounding technique. For analysis of data, paired t-student test was used. The results showed that at sites of apically positioned flap with bone exposure, the crestal resorption was 0.77 +/- 0.63[mm] and on the opposite side it was 1.05 +/- 0.19[mm]. The difference before and after surgery in each area was significant but the difference between two sides was not significant. It was concluded that crestal resorption observed following two periodontal surgery methods plays an important role in reconstruction of biologic width

[Evaluation of supported overdenture by implant and magnet]

Introduction: implant supported overdentures may be used as an alternative to fixed bridges especially in edentulous patient who can not afford the high cost of fixture placement. The overdenture may be attached to the implant by one of several methods. One of them is magnet. Advantages with magnet include a simplified dental technique and reduced lateral stresses on the abutment. The aim of our study was to determine the rate of success rate of magnet in implant supported overdentures through clinical and histological analysis

Materials and Methods: seven patient received above overdentures with magnetic retention. The course of study was 4 years. The patient had been edentulous for several years and were unable to function with a lower denture due to lack of retention and stability. Such a problem had not been solved by a conventional approach. The implants and magnet selected from Dyna company

Results: the use of implant and overdenture with magnetic attachment was an appropriate alternative for patients who have totally flat jaw and no better option than magnet overdenture. In this study, two magnets with 500gr/f yielded a good retention for prosthesis so nutrition, phonetic and esthetic needs were resolved. No side effect from magnet on peri-implant soft tissue was observed. The gingival sulcus was 2.08mm and the bone loss was 1.23mm after one year. Magnet resistance to corrosion was very little and the need for changing of magnet after the course of study was obvious

Conclusion: use of magnet and overdenture supported by implant in patients with totally flat jaw, who could not be treated by any other technique, is an appropriate alternative