ABSTRACT
The replacement of missing teeth with late dental implants has become an acceptable and standard treatment modality. However, there have been only a few studies evaluating the immediate dental implants. The aims of this study were: 1] To evaluate the possibility of inserting dental implants into extraction sockets immediately after extraction. 2] To assess osseointegration after immediate implant insertion clinically. 3] To evaluate the changes in depth and width of defects surrounding implants as well as change in distance from cover screw to alveolar crest after insertion of fixtures following immediate implantation and assess the efficacy of this method in preserving height and width of the alveolar ridge. In this clinical trial which had a before-after design, five implants were inserted in 3 patients immediately following extraction of the teeth number 44, 47, 11, 14 and 23. HA coated Dyna implant systems were used in this study. At the initial stage as well as the second stage of surgery the following parameters were measured at 6 sites around each implant: width and depth of remaining defect around the neck of fixtures and the distance from the covers crew to crest. The role of baseline defect parameters on the final configuration of defects were analyzed statistically, by paired t-test and multiple regression. Defect depth and defect width showed improvements of 3.4mm [90%] and 1.8mm [94.5%] respectively which were statistically significant. Improvement in the width and depth of defects had negative correlation with baseline defect width and depth. Furthermore, the distance from alveolar crest to the cover screw at baseline had a significant influence on the reduction of the defect width at the re-entry visit. Primary stability at the insertion visit had a significant and positive effect on the remaining defect depth at the re-entry, although its effect on the defect width was positive but insignificant. Sites with primary stability showed a 10 times smaller distance from cover screw to the crest, which was statistically significant. Insertion of immediate implants into extraction sockets using Dyna HA coated implants are clinically possible, with a predictable and successful outcome. In addition, primary stability of implants in such sites, although is not essential for clinical osseointegration, it may facilitate the bone fill in the defects around immediately inserted implants
ABSTRACT
Hereditary gingival fibromatosis [HGF] is a rare condition with undetermined etiology, thus is designated as idiopathic. Previous studies have revealed that the pattern of inheritance is autosomal dominant or [rarely] autosomal recessive. In our study a group of family members in three generations were followed for 30 years. This clinical and histological study was initiated by the extraction of remaining teeth and excision of the enlarged gingiva of the oldest member of the group. No recurrence happened after 30 years of follow-up. The other cases were operated twice during the primary and permanent dentition periods. After the second surgery, so far there has been no recurrence in any of the patients. In all cases the hyperplasia developed after the eruption of teeth and recurrence was observed after surgery in some of them who retained some teeth
ABSTRACT
Introduction: diabetes mellitus is one of the most common metabolic diseases in which elevated blood glucose level interferes with activity of Polymorphonuclear [PMN] cells. Prevalence and severity of periodontal diseases in diabetic patients are also reported to be higher than nondiabetics. Considering different opinions regarding the interrelationships of PMN cell dysfunction and destruction of periodontal tissues in diabetics, this study was performed
Materials and Methods: this study was a case-control one. 53 cases [22 with IDDM, 21 with NIDDM and 10 non diabetics] were selected for this study. Diabetic patients [equal males and females] were referred from Mashhad Diabetic Center. The examined parameters were PMN cell function [using NBT test], fasting blood sugar, plaque index, pocket depth, bleeding index and bone loss [using panoramic x- ray]. The data were analyzed using One - Way ANOVA, multivariable analysis, Tukey test and correlation coefficient
Results: the fasting blood sugar level of both diabetic groups were significantly higher than that of nondiabetic groups [P<0.001]. The plaque index was significantly higher in NIDDM group compared with control group [P=0.002]. Bone loss was more severe in NIDDM group than IDDM and control groups. The difference was statistically significant. PMN cell function in IDDM group was significantly lower than NIDDM and control groups [P=0.011]
Conclusion: observing the result, it is tempting to claim that with aging and in the presence of suitable condition for the plaque bacteria, the periodontal disease in the diabetic patients become more server. Prevention of the periodontal diseases will be possible provided that the blood sugar level and the bacterial plaque are controlled
ABSTRACT
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