JOURNAL OF ISLAMIC DENTAL ASSOCIATION OF IRAN (MAJALLAH-I-DANDANPIZISHKI)
Year:2001 | Volume:13 | Issue:3 (38)|Papers Count:12

Extensive application of micro-10 +solution as a useful and easy to obtain disinfectant in IRAN dental market motivated us to evaluate its antimicrobial rate and quality. Aim of this research was to assess the efficacy of the micro 10 + solution on several different fungal and bacterial species as manufactory orders.In test many microbial samples suggested by different standard methods used for examination of micro 10 + solution. Test sample was micro 10+ solution available in market. After preparation of microbial suspensions from resistant or indicator strains, the suspensions mixed with 2% micro 10+ solution and then this mixtures cultured in suitable growth environments. The results were recorded.The results of this investigation indicate that micro 10 +solution has high bacteriocidal potency and is able to kill all of the microbial stubs studied in this search irrevocability and therefore routine use of this material as a certain disinfectant is recommended.

Restoration of endodontically treated teeth is necessary for many reasons such as: Preservation of remaining tooth structure, prevention of coronal leakage, function & esthetics. Due to limitation of tooth structure, restoration is difficult and remnant tooth structure is unable to retained restorative material. Among different restorative methods, it seems that post & core system have better success. Restoration of endodontically treated teeth with full crown coverage can increase the strenght of these teeth. But existence of some problem with full crown coverage and the relative high expense of this therapy suggest other method for restoration of such teeth.The purpose of this study was to evaluate the compressive strenght of endodontically treated teeth that restored with and without prefabricated post, and evaluation the effect of adhesive cements.The following results were achieved: untreated teeth (intact) have highest strength whereas teeth with endodontically treated teeth and no restoration have lowest strength.The difference between experimental groups (restored) with & without post & cemented with adhesive and non adhesive cement are not statistically significant.Therefore prefect restoration has been achieved from endodontic treatment and prefabricated post has been pointed only for retention of restorative material but not for the increase of strength of teeth.

Although the effect of third molars on the stability of orthodontic treatment has been studied extensively, but the effect of orthodon tic treatment, particularly premolar extraction, on third molars has not been substantially studied. The purpose of this investigation was to compare the changes in third molar angulations in patient treated with extraction (group: 1) and without extraction (group: 2). Records of 36, non extraction and 36 first premolar extraction cases were examined. The pretreatment and post treatment pantographs were digitized, and the angles between the third molar long axis and the occlusal plane were measured. Using student's t-test changes in third molar angulations from pretreatment to post treatment for the two groups were compared for statistical differences using a student's t- test. On average, the mandibular third molars in two groups and maxillary third molars in extraction group showed an improvement in angulations relative to occlusal plane and maxillary third molar in non extraction group showed an undesirable change in angulations relative to occlusal plane. Statistical analysis revealed there were no significant differences in the change in third molar angulations in either group. The result suggests that factors other than first premolar extraction may influence third molar angulations.

In this cross sectional research we studied 494 cases of orthodontic department of Shiraz Dental School, in winter and spring 2001. Main purpose of this study was to determine prevalence of missing teeth in different malocclusions. Panoramic radiographys of patients were studied and compared with clinical finding registered in their files. Results showed that 7. 66% of whole samples (35 patients) had missing teeth, among them. there were 4.86% in Cl II, 1.8% in Cl I and 1% in Cl III malocclusions, that had no statistically differences (Chi-Square test, P.Value= 0.021).From those cases with missing teeth 58% were female & 42% were male, without any significant statistical difference (Fishers exact. P.Value= 0.552).Most frequent missing teeth were upper lateral incisor (28%). In the comparison between maxilla and mandible, maxilla had more prevalance of missing teeth (59.13%).Missing teeth observed more in the left side (55.91 %). Majority of missing teeth were occurred bilaterally (73.11%). 73.68% of missing cases had only one or two permanent teeth agenesis. The most frequent missing tooth that accompanied with other missing teeth was upper lateral incisor. 109 patients (22%) had not third molar in their panoramic x-ray and just tow of these cases was more than 15 years - old.Finally first upper premolars which missed bilaterally in all cases. There was no significant difference between results of this research and other investigations.

Today dentistry is one of interested sciences in the world. Dentistry has at least ten speciality. 558 dental students were asked about interst to post graduate programs (Summer of 1380). These students selected from Tehran, Beheshti, Azad and Shahed Universities. One of the aims of this survay was to compare capacity of residency Acceptance with appliers for post graduate programs. Results as follows: 438 (78.5%) students were interested to residency programs. 120 (21.5%) students were not interested to residency program. Specialities which were the most interesting among the students are: 1) Orthodontics 2) Oral & maxillofacial surgery 3) Endodontics. 4) Operative. 5) paediatrics. 6) Prosthodontics 7) Periodontics. 8) Oral & maxillofacial pathology. 9) Oral, medicine. 10) Radiology. This survey has shown that most of graduates of dentistry want to continue post graduates programs.

In the last two decades there has been a deep changes in caries diagnosis methods. Dentists today can diagnosis the incipient caries in the early stages by use the new methods of caries diagnosis. Promotion of Knowledge of dentist in related to caries diagnosis be able him to decrease the probable mistakes and increase the importance of diagnosis. Then the dentist can treat the cavities in the early stages. It will also increase the validity of epidemiologic researches. This article will describe the caries diagnosis methods and the procedures of every methods.

Epiglue ® is an ethy 1-2 cyanoacrylate based tissue adhesive. Cyanoacrylate has been used successfully as a tissue adhesive for the external application to fresh cuts and lacerations of the skin.The efficacy of the cyanoacrylate as a tissue adhesive for the non-tensional flaps of oral mucosa was studied. Patient required alveoplasty of the upper or lower jaw were selected. The full thickness mucoperiosteal flaps were reflected and the sharp bone margins were smooth. The edges of the flaps were repositioned and stabilized using a figure of eight tissue holder. The cyanoacrylate were transported by an applicator and brushed on top of the wound in two coatings. The patients were reviewed after 3,7,14 days.30 patients were treated (19 female and 11 male), 17 cases in the maxillae and 13 cases in the mandible. The mean age of the patients was 62 years. Epiglue ® can be use as a suturing material in the non - tensional full thickness mucoperiosteal flaps.

Until recently: There was a consensus on the classification of periodontal disease proposed by American Academy of Periodontology (AAP) in 1989. This classification, however, has some limitations. For example, unclear diagnostic criteria, overlap of different disease groups, undefined diseases with calssification, overemphasis on the onset of plus progression rate or the disease, and the impossibility of determination of these disease. In fact gingival inflammation was not even defined in the classification.In 1999, an international committee was appointed by AAP to to revise and restore the calssification. This work concluded with a new calssification based on a comprehensive approach to all disease.The present article reviews this calssification, highlights the differences, and makes comment on it.