Journal of Dentistry, Shiraz University of Medical Sciences最新文献

{"title":"AMELOBLASTOMATOUS CALCIFYING CYSTIC ODONTOGENIC TUMOR: A RARE HISTOLOGIC VARIANT","authors":"F. M. Abbas, M. Moshref, S. Sargolzaei, N. Kargahi","doi":"10.30476/DENTJODS.2019.43618","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.43618","url":null,"abstract":"In agreement with the new classification of the World Health Organization (WHO) 2005, calcifying odontogenic cyst (COC) or calcifying cystic odont-ogenic tumor (CCOT) is an uncommon developmental odontogenic lesion that demonstrates histopathologic diversity.  Predominantly, it occurs in the anterior region of the mouth and in the second and third decades of life. Odontogenic tumors such as ameloblastoma have been reported to be associated with CCOT. In this paper, we report a case of ameloblastomatous CCOT in a boy with involvement of mandibular ramus- an extremely rare histologic variant. The microscopic examination revealed a CCOT; ghost cell within ameloblastic islands in the connective tissue wall was observed.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"11 1","pages":"45-48"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88094799","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dental Erosion and Its Risk Factors in 12-year-old School Children in Mashhad","authors":"M. Talebi, A. Saraf, M. Ebrahimi, E. Mahmodi","doi":"10.30476/DENTJODS.2019.43612","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.43612","url":null,"abstract":"Statement of Problem: The dental hard tissues might be destroyed by different factors. One is dental erosion defined as the progressive loss of hard dental tissues by a chemical process not involving bacterial action. Purpose: The purpose of this study was to determine the prevalence of dental erosion and its risk factors in 12-year-old school children. Materials and Methods: This cross-sectional study was carried out on 483 12-year-old school children in Mashhad, 2007. Dental erosion was recorded for the labial and palatal surfaces of the upper incisors. For measurement purposes, the O'sullivan's index was adopted, and the results were statistically analyzed by T-student and Chi-Square tests. Results: The prevalence of dental erosion was 38.1%, with no significant sex difference. Dental erosion was significantly higher in private school children ( P <0.001) and in underprivileged areas ( P =0.005). Matt appearance of the enamel was the most prevalent type of dental erosion (21.2% central incisors, 5.2% lateral incisors). In most of the involved cases, more than half of their surfaces were diagnosed as affected by erosion (24.4% central incisors, 5.2% lateral incisors). The frequency consumption of carbonated beverages and night drinks illustrated a significant relation with dental erosion ( P =0.01, P =0.023). Children who swam professionally in swimming pools had significantly higher dental erosion ( P <0.001). Conclusion: Based on the findings of this study, individually tailored preventive programs may be recommended to patients and a comprehensive case history should be taken so that all risk factors can be revealed.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"13 1","pages":"13-18"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80059207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In- vitro Study of the Effect of Clotrimazole Incorporation into Silicone Soft Liner on Fungal Colonization","authors":"M. Vojdani, M. Zibaei, Khaledi A.A.R., K. Zomorodian, Ranjbar, S. Boushehri","doi":"10.30476/DENTJODS.2019.43613","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.43613","url":null,"abstract":"Statement of Problem: Candidal colonization on soft liners is important in the development of pathogenesis, such as denture stomatitis. It has heen reported that combining anti-fungal agents into soft liners might be used in treatment and prevention of denture stomatitis. Purpose: The aim of this in-vitro study was to determine whether incorporating clotrimazole (C) into the silicone soft liner (S), would inhibit the growth of C. albicans when the specimens are stored in distilled water and washed daily with wet cotton. Methods and Materials: Experimental specimen disks incorporated with clotrimazole (Sc 1 , Sc 30 , Sc 60 ) and without clotrimazole (S 1 , S 30 , S 60 ) into the soft liner (no=8) were fabricated aseptically against the polyester film to produce a smooth surface. The treated and control disks were stored in distilled water for 1, 30 and 60 days and washed daily with wet cotton. For fungal growth assessment, they were inoculated with C. albicans suspension. The disks were rinsed and sonicated in sterile water to remove surface organisms. The attached yeast was measured by inoculation of the yeast suspension on Sabouraud's agar. The data were compared using two-way ANOVA. Results: The mean colony forming units (CFU) per mm 2 for the specimens without clotrimazole after water storage and washing with wet cotton for 1, 30 and 60 days was 6.5I10 6 , 5.8I10 6 and 6.1I10 6 , respectively. CFU for specimens with clotrimazole decreased significantly to 2.6I10 6 and 3.9I10 6 and 4.6I10 6 after 1, 30, and 60 days, respectively. In comparison to those of the control disks, clotrimazole in treated disks was effective in inhibiting C. albicans growth significantly following storage in water for 2 months ( P <0.05). Conclusion: The addition of clotrimazole significantly reduced C. albicans growth to the surface of the silicone soft liner. The samples continued to inhibit the fungal growth when they were washed daily with wet cotton for 2 months.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"100 1","pages":"19-23"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77503545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chronic Mucocutaneous Candidiasis Associated with Osteogenesis Imperfecta: A Case Report","authors":"A. Pakfetrat, M. Sanatkhani, F. Bidram, B. Baghaei","doi":"10.30476/DENTJODS.2019.43617","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.43617","url":null,"abstract":"A male patient aged 6.5 years (patient No.1) is reported with chief complaint of white lesions in his mouth from birth, which was finally diagnosed as chronic mucocutaneous candidiasis (CMC). Clinical, radiographical and histopathological examinations revealed dentinogenesis imperfecta associated with osteogenesis imperfecta in both the patient and his sister (patient No.2). The importance of early diagnosis and treatment of both diseases is discussed in this report.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"42 1","pages":"41-44"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80744148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EFFECT OF COMPOSITE ELASTICITY AND FILLER CONCENTRATION ON SHEAR BOND STRENGTH OF COMPOSITE TO DENTIN","authors":"H. Heshmat, G. Alavi, N. Mandana, A. Alavi","doi":"10.30476/DENTJODS.2019.43619","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.43619","url":null,"abstract":"Statement of problem: Resin composites are one of the most popular tooth colored restorative materials. Their enamel and dentin bonding ability are based on many factors, including elasticity and filler concentration. Purpose: This study was undertaken to evaluate the effect of volumetric filler percentage and modulus of elasticity of six composites by measuring shear bond strength to dentin of the bovine teeth as experimental bonding substrate. Materials and Methods: Eighty bovine incisors were prepared and divided into eight groups. Tetric Ceram, Tetric Flow, Compo glass F, Helimolar RO, Definite, and Degufill Mineral were applied respectively. A fifth generation of dentin bonding system [Single Bond (3M, USA)] was used for all the groups. The volumetric filler percentage of each composite was obtained from their specification data. The modulus of elasticity was determined, using the formula presented by Bream et al. (1986). Then, in last two groups Heliomolar RO and Definite were bonded using their own bonding systems, Syntac Multicomponent, and Definite Multibond. The shear bond strength was measured according to the ISO/TR 11405. Pearson’s correlation test was used to compare the result with groups 4 and 5. Results: The results indicated that the relationship between both the filler percentage and the modulus of elasticity with the shear strength was 16% (P<0.005). There was a significant difference between groups 4 and 7, but no significant difference was observed between groups 5 and 8. Conclusion: Using composites with a higher filler content and modulus of elasticity resulted in higher shear bond strength in dentin bonding system. Our results showed that the corresponding dentin bonding system of composites had better results.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"1 1","pages":"6-12"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88264031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EVALUATION OF CLINICAL EFFICACY OF TWO LOW-DOSE DOXYCYCLINE REGIMEN IN PATIENTS WITH CHRONIC PERIODONTITIS","authors":"A. Lafzi, R. Amid","doi":"10.30476/DENTJODS.2019.43611","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.43611","url":null,"abstract":"Statement of Problems: Incomplete therapy of periodontal diseases treated with scalling and root planning (SRP) has been resulted in improvement of host- modulated therapy (HMT) as a new method. Purpuse: Introducing an adjunctive therapy in addition to SRP in managing of destructive preiodontal therapy was the main purpose of this study. Materials and Method: Fifteen patients suffered from chronic periodontitis were randomly assigned to test and control groups. Treatment consisted of: SRP+ placebo (control group), SRP+ low dose doxycycline (LDD) twice daily for six months (continous LDD), and SRP+LDD twice daily for first and third two months after completion of phase I (cyclic LDD). Gingival indices including: probing depth (PD), clinical attachment level (CAL), modified gingival index (MGI), and O’leary plaque index were measured and recorded at baseline and at one and six months after the completion of therapy. The data were analyzed using one-way ANOVA and Kruskal-Wallis tests. Results: Probing depth reduction in both of LDD groups were significantly greater than control group (p<0.01). However, this reduction happened between baseline and follow-up oppointments. In other word, the differences between the 1-and 6-month evaluation were not significant (p=0.25). Continous LDD regimen showed an additional PD reduction (from 5.40 to 2.06mm) for pockets greater than 5mm in comparison to the other groups. Conclusion: Within the limitation of this study, the results showed that adjunctive continous and cyclic regimen of low-dose doxycycline can improve the clinical efficacy of conventional therapy, even in patients with less than favorable plaque control. Key words: Chronic periodontitis, Antibiotic, Doxycycline, Adjunctive therapy.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"53 1","pages":"1-12"},"PeriodicalIF":0.0,"publicationDate":"2008-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86700270","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Importance of Maxillary Canine: A Review","authors":"S. Danaei, P. Salehi, M. Kalantari","doi":"10.30476/DENTJODS.2019.41527","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.41527","url":null,"abstract":"Canines are the unique members of dental arches. They play a very important role in human and animal’s dentition. They support lip and facial muscles and in this way promote facial esthetics. In addition, the canines act as important guideposts in occlusion. Their deep overbite serves as a protective mechanism relieving the posterior teeth from excessive and potentially damaging horizontal forces during lateral excursion of the mandible. The ectopic eruption and impaction of the canine is a frequently encountered problem. The prevalence is estimated to be between 0.8 to 2.8% in the maxilla. In the maxilla, it is shown to be palatal to dental arch in about 85% of the cases. The etiology of the ectopic eruption and impaction is not well understood although, according to some speculations, it can have a multi- factorial feature as: arch length discrepancy, genetic and familial trend, delayed exfoliation of the primary canine, abnormal tooth bud’s position, trauma, etc. The diagnosis of unerupted canines involves: inspection, palpation and radiographic assessment. The ectopic canine would often require complex multidisciplinary treatment involving surgical, restorative, periodontal as well as orthodontic components. In this article, an overview of the incidence and sequelae as well as the surgical periodontal and orthodontic considerations in the management of impacted canines are presented. Key words: Maxillary canine- Diagnosis of Impaction- Treatment","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"8 1","pages":"53-61"},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87221031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE PATTERN AND DISTRIBUTION OF GINGIVITIS IN SCHOOL CHILDREN OF BOSHEHR-IRAN","authors":"S. Behrouzi","doi":"10.30476/DENTJODS.2019.41521","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.41521","url":null,"abstract":"Background: Gingivitis is the most common oral disease that involves various areas of the mouth with different degree and intensity. The beginning of gingivitis is seen in age 5, and its prevalence is increased with age. There are different opinions about the involved areas that are most commonly or most severely affected in epidemiological researches. This study was designed to determine the pattern and distribution of gingivitis and to compare the prevalence and severity of gingivitis in involved areas. Materials and methods: In this investigation, 659 randomly selected cases of school children were evaluated with periodontal Russel Index. The results of this study were compared to those of others. Results: The findings showed that %43.5 of the students had gingivitis and its prevalence was more in boys than girls and more in the lower Jaw than the upper one. The prevalence and severity of the disease was more in the molar area than the incisor area and the most affected teeth were the first molars. The prevalence of gingivitis was almost similar in the right and left sides but its intensity was a little more in the right side. The most affected age was 15 years old. Conclusion : High incidence of gingivitis indicates that oral hygiene measures are poor among Booshehri school children and need much more attention and consideration. Key words: Gingivitis, Distribution, Gingiva","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"27 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80624004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Survey of the Principles of Partial Denture Construction by Dental Laboratories in Shiraz","authors":"M. Vojdani, A. Izadi","doi":"10.30476/DENTJODS.2019.41528","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.41528","url":null,"abstract":"Background: As conventional prosthesises are still the most common prosthetic treatment for public, this study has been conducted to assess the communication between the dentist and dental laboratories and find the supervision of the dentists on lab works. Materials and Methods: In this descriptive, cross- sectional study, by referring to ten dental laboratories, seven basic steps of the construction of PDRs have been considered and all the necessary information was recorded in a questionnaire. Results: In %83 of the cases, RPDs were constructed on the study diagnostic casts and for %100 of the cases no border molding had been done. %83.7 of the retentive clasps were not actually retentive, but again in %83.7 of them there was some form of reciprocal component. In %96.7 of the cases, the clasp arms were fabricated on unprepared tooth surfaces. All major connectors were rigid and in %42.9 of the cases they had enough distances to gingival margins. In most cases, indirect retainers were absent or were made in wrong places. Only in 10 out of 35 distal extension cases, RPD design was considered and for the rest, no special design was observed. In only %5, guiding planes were made on prepared tooth surfaces and finally it appeared that the majority of RPDs were designed by dental technicians rather than by dentists. Conclusion: The results indicate that dentists frequently use techniques that require a minimum of appointment time. Therefore, a greater emphasis is required to be put on continuation of education for dentist, along with better and more detailed communication between the dentists and dental laboratories. Key words: Removable partial dentures, Dental laboratories, Design.","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"18 1","pages":"62-67"},"PeriodicalIF":0.0,"publicationDate":"2004-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84196473","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of Tooth Size Ratios (Bolton Analysis) Among Different Malocclusion Groups","authors":"H. Fatahi, R. Razmdideh, H. Poursadeghi","doi":"10.30476/DENTJODS.2019.41525","DOIUrl":"https://doi.org/10.30476/DENTJODS.2019.41525","url":null,"abstract":"Introduction: For proper occlusal interdigitation or coordination of arches in the finishing stage of orthodontic treatment with proper overjet and overbite would have been a proper mesiodistal tooth size ratio (Bolton analysis) between maxillary and madibular teeth. The Bolton analysis should be taken into consideration when diagnosing, treatment planning and predicting prognosis in clinical orthodontics. In this study tooth size ratio was evaluated among different malocclusion groups. Materials and Method: This study was carried out on 200 pretreatment orthodontic casts, which were chosen through selective available sampling procedure according to selective criterias. They were classified by the Angle classification, coincided with skeletal categories.  Skeletal types were assessed by ANB angle from cephalometric analysis. All the subjects were divided into 4 groups: each group consisted of 25 males and 25 females. These groups were Cl I malocclusion, Cl II Div 1, Cl II Div 2 and Cl III. The greatest mesiodistal diameters of all the teeth on each cast were obtained except the second and third molars. The measurement was done by digital caliper with 0.01 mm accuracy. Then tooth size ratios were analyzed as Bolton described. Results: The main anterior ratio for male patients was larger than that of female patients in all groups (p<0.05), while there was no significant sexual dimorphism for overall and posterior ratios between the groups. The mean of the anterior ratio of Cl III patients was shown to be more than Cl II Div 1 amd Cl II Div 2. No statistical difference was found between Cl III and Cl I patients. Posterior and overall ratios of Cl III patients were larger than other groups. The mean overall ratio of Cl I patients was larger than Cl II Div 1, but it had no significant difference with Cl II Div 2 group. Conclusion: This study suggests that the tooth size discrepancy between the maxillary and mandibular teeth may be one of the important factors in the cause of malocclusions, especially in Cl III malocclusion. Key words: Bolton analysis, Anterior, Posterior and overall ratios, Malocclusion","PeriodicalId":15562,"journal":{"name":"Journal of Dentistry, Shiraz University of Medical Sciences","volume":"1 1","pages":"39-46"},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89757841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}