Journal of Dental Medicine

Normal 0 false false false EN-US X-NONE AR-SA In current survey, 200 general dentists and 98 general physicians were recruited  as test and control groups respectively and analyzed for having osteoarthritis. The prevalence of osteoarthritis was found considerably higher in dentists compared to physicians ( 23.5% to 13.3%) . The mean age of dentists diagnosed with osteoarthritis was 11 years  lower than physicians( 48 years to 59 years). Osteoarthritis was noticeably higher in neck among dentists but in back was equal between the two groups. The ratio of Osteoarthritis in men to women was 3 to 2. Among the studied cases, neck was the most frequent site of the disease.

Normal 0 false false false EN-US X-NONE AR-SA In this study, 30 boy students of 16-17 years were randomly selected and were allocated into three groups: The control group, Bass group in which the members were instructed to brush their teeth with Bass method and Rolling method group in which they were asked to brush  with Rolling Method. Two latter groups brushed their teeth two times a day (morning/night) .for all the participants, ultrasonic scaling was done 4 weeks prior to the study. After 4 weeks, PLI and GI were measured and recorded by Sillness and Loe method. All the participants used a soft multitufted tooth brush. All 3 groups showed lower indices in comparison to basle line measurements but Two latter groups showed  higher difference in comparison to the control group.The difference between Second and third groups was not found statistically significant. Gingival index during 4 weeks of study has not changed siginificantly.The obtained results confirmed the importance of duration and quality of every brushing technique.

Statement of Problem: One of the dental lesions which is mainly diagnosed by periapical radiography is apical root resorption Diagnosis of the presence and extension of this lesion can put some effects on its treatment plan and prognosis.

Purpose: The aim of the present study was to evaluate the efficacy of periapical radiography on apical root resorption diagnosis. Materials and Methods: In this experimental study, sixty extracted teeth were examined radiographic and histological regarding the presence and extension of apical root resorption. It should be noted that periapical radiographs were taken before extraction of all mentioned teeth. The results were analyzed by Fisher’s exact test.

Results: The results of this study showed significant differences between radiological and histological examinations (P=0.0003). Significant correlation between these two observations was seen only in 53.33% of cases comprising 23% of teeth with root resouption. Non-correlation was found in 46% of samples. Moreover, there was no significant difference in the prevalence of apical root resorption between maxillary and mandibular teeth (P=0.233). Sensitivity of periapical radiographs in apical root resorption diagnosis was determined 57.3%. Conclusion: According to the findings of the present study, it seems that periapical radiography technique does not possess desirable efficacy in diagnosis of apical root resorption and its limitation should be considered by clinicians.

Background and Aim: In recent years, different substances have been considered in gingival cervical fluid (GCF) as diagnostic markers due to the evaluation of biologic events and biochemical process related to bone turnover during orthodontic movements. IL-6 concentration increases in GCF during the first week after force loading. The aim of this study was to investigate the levels of IL-6 in GCF during orthodontic movements.

Materials and Methods: Fourteen orthodontic patients (9 females and 5 males, mean age 15.1±2.5 years) with Cl I malocclusion needing first bicuspid extraction participated in this clinical trial. In each patient one maxillary canine was distalized (DC) with a NiTi push coil spring. The contra-lateral canine (CC) was included in the orthodontic appliance but was not subjected to the orthodontic force  and one of the mandibular canines was used as control with no orthodontic appliance (Antagonist canine: AC). The concentration of IL-6 was evaluated at the baseline and 14th and 28th days after intervention. GCF was taken with periopapers from both mesial and distal sides of tooth before appliance activation, on the 14th and 28th days. Concentration of IL-6 in DC, CC, and AC detected by ELISA reader was compared by repeated measure ANOVA and LSD multiple comparison, P<0.05 was considered statistically significant.

Results: Although the inflammatory gingival indices increased in both DC and CC teeth but it was not significant. The amount of IL-6 in GCF increased on day 14th in DC teeth in comparison with AC and CC teeth. In addition, the concentration of IL-6 in DC teeth was significantly greater than the 1st and 28th days. The maximum concentration of IL-6 was detected in both pressure and tension sides of DCs at T₁₄. At T₂₈, although the IL-6 levels were significantly higher than baseline levels but, it was significantly less than T₁₄.

Conclusion: The results of this study support the hypothesis that mechanical stimuli cause an inflammatory reaction within the periodontal tissues.

Background and Aim: One of the complications following major oral surgeries is mucosal defects and delayed healing process. Up to now, various mucocutaneous grafts have been used in this field and recently, amniotic membrane has been proposed as a biological dressing in dermatologic, ophthalmologic and otolaryngologic practices. The purpose of this pilot study was to evaluate the healing process following human amniotic membrane graft on oral keratinized mucosa of rabbit.

Materials and Methods: In this experimental animal study, two surgical mucosal defects with the same size were made in palatal mucosa of 10 rabbits with the same weight, gender and race and a graft of human amniotic membrane was used on one of the defects. On the 7th, 14th and 28th postoperative days, surgical biopsies were randomly obtained from grafted and ungrafted regions of 3, 4 and 3 rabbits, respectively and submitted for microscopic study.

Results: According to the results, grafted regions showed more surface epithelialization and thicker newly formed epithelium. Also inflammatory cells infiltration was less in these areas. In all cases, there was a remarkable cartilage formation in the connective tissue of the recipient sites.

Conclusion: The results of this study suggest that the use of amniotic membrane graft in oral surgery could be effective in healing process. Additional studies should be done using animal and human models with more samples. Furthermore, the formation of cartilage in the grafted sites and its possible potential in reconstruction of bone defects, needs to be studied.