Journal of Dental Medicine

Evaluating the prevalence of second mesiobuccal canal in maxillary molars

Normal 0 false false false EN-US X-NONE AR-SA During the past century, valuable studies were done on maxillary mesiobuccal canals morphology. In general, knowing pulp-chamber floor is a great aid in finding extra root canals. Findings of invivo and invitro canals are highly different which implies difficulties in finding canals in clinical treatments. Therefore in this study by modifying access cavity preparation methods possible orifice areas are introduced. In an invitro analysis, 29% of first maxillary molars canals were found Type 3 and 35% Type 2 in radiographic view of mesiodistal aspect. In intra oral analysis, by modifying access cavity and removing mesial wall dentin, a high percent of these orifices are discovered.

Nonsurgical treatments in periodontics

Normal 0 false false false EN-US X-NONE AR-SA Both surgical and nonsurgical treatments are definitely effective in ameliorating periodontal condition. In nonsurgical treatments, pocket elimination is not an essential part but subgingival infection control is the main objective which can eliminate inflammation, stop destruction, form new attachments, decrease pocket depth (following edema decrease) and finally result in long junctional epithelium formation. In short term, surgery can eliminate pocket depth more effectively although after a while this difference would become less. Besides, nowadays according to infectious nature of periodontal diseases systemic and local antimicrobials are used along with nonsurgical and mechanical treatments specially in rapidly progressing periodontitis, HIV related periodontitis and refractory periodontitis . Therefore, the most appropriate and simplest treatment plan should be selected according to the type of periodontal disease.

Rotational path of insertion in partial prostheses

Normal 0 false false false EN-US X-NONE AR-SA The theory of designing partial prostheses with rotational path of insertion has been debated for years but most dentists do not consider this treatment method. In conventional partial prostheses, the rests have a single path of insertion while in rotational path of insertion, first the center of rotation sits in the rest then the prosthesis is roated and inserted in final position. In rotational path of insertion prostheses, a rigid retainer is needed as well as conventional clasps. The rigid retainer is inserted in undesirable undercut areas that are not used in conventional method. In current study, methods of rotational partial prostheses as well as their advantages and disadvantages are introduced and discussed.

HLA antigens status in 14 Iranian patients with lichen planus

P. Ghalyani

Normal 0 false false false EN-US X-NONE AR-SA In present article, in order to evaluate the role of genetics in the etiology of lichen planus, 14 patients (6 with familial history of lichen planus and 8 without any history of the disease in family) were selected. HLA antigens (class 1, class 2, B, C) were analyzed by lymphocytotoxicity NIH two stage methods. The patient's age range was 24-66. In our study, although patient's quantity cannot represent Iranian population and therefore we cannot report antigen prevalence, we can state that in our sample a relative increase in HLA B5 or B5 cluster was found.

Evaluating lichenoid oral lesions and the prevalence of candidal infection

Normal 0 false false false EN-US X-NONE AR-SA 50 patients with oral lichenoid lesions who had oral candidiasis were selected for clinical examination and histopathologic evaluation. Inclusion criteria were reticular lichenoid lesions or any erosive, atrophic, bullouse or plaque-like changes with any reticular view. Medical and dental history and recent used drugs of patients were recorded in special forms. Incisional biopsy was taken from all the lesions. From Each biopsy, 4 incisions were provided of which one was colored by E&H and the others with PAS. E&H was used for pathologic diagnosis while PAS incisions were used for identifying candidal psudohyphae in epithelial tissue. In this analysis, findings on lichenoid lesions were obtained as well as observing a single case of candidal infection.

Evaluating the prevalence of numeric anomalies of primary teeth in 3-5 years children of Isfahan Kindergartens

Normal 0 false false false EN-US X-NONE AR-SA 1482 patients of 3-5 years ( 56% m/44% f) were selected from Isfahan kindergartens. In 1.4% of them, numeric dental anomaly was diagnosed of which 0.74 % had congenital missing teeth, 0.06 % had hyperdontia and 0.6% had geminated teeth. 0.72 % of Congenital missing was seen in boys while 1.2% in girls. Also, Gemination was seen 0.12 % in boys and 1.2% in girls which is 10 times more than boys in total study population. 0.2% of cases had concomitant tooth missing and gemination. Missing was mostly seen in mandibular incisors. Germination was seen 80% in mandibular anterior region. Besides, in 50% of the patients who had primary teeth missing, permanent teeth missing in both sides were also diagnosed by radiography. One case found with supernumerary tooth in maxillary lateral incisor region. In this article, the possible risk factors were analyzed in case and control groups. Any significant relationship between these factors and numeric dental anomalies was concluded.

A research on etiology of instable treatment of skeletal Class 2 division 1 by functional appliances

A. Khavari

Normal 0 false false false EN-US X-NONE AR-SA In some dentoalveolar disorders, orthodontic treatments are occasionally failed during the treatment or even after retention phase. As a result, identifying the reasons of failure would be helpful. Since various indistinct factors can cause treatment failure, we focused on skeletal class 2 divisions 1 disorder and by studying 64 patients with the average age of 6.5 years, more data were collected.

Treatment of Periodontal diseases by local delivery system

Normal 0 false false false EN-US X-NONE AR-SA According to the role of microbes as etiologic factors of periodontal diseases, mechanical factors are required to eliminate microbial plaque. Although systemic chemotherapy is mentioned in the articles, it is still ineffective on adult periodontitis. Therefore, using local antibacterials and controlling their release have been considered. In this article, methods and materials that can result in antibacterial slow release in local delivery systems are discussed.