@article { author = {Atashrazm, P. and Ansari Lari, H. and Khorsand, M.}, title = {An Evaluation of Occlusal Contacts of Remounted Complete Denture before Final Occlusal Adjustment}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {1-5}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43611}, abstract = {Statement of problem: There are various studies about the advantages and effect of remounting procedures on success of complete dentures; however, the number and distribution of occlusal contacts of remounted complete dentures before occlusal adjustment have not been sufficiently assessed. Purpose: The purpose of this study was to evaluate the distribution and number of occlusal contacts of remounted complete dentures in centric relation before occlusal adjustmentMaterials and Methods: In this cross-sectional study, 207 newly constructed complete dentures were remounted on a modified two dimensional articulators. For identification of occlusal contacts, a 60 micron articulating paper was used to mark the actual contacts of the opposing teeth. The articulating paper was interposed between the teeth, and contacts were obtained by holding the articulating paper between the opposing teeth. The number and distribution of the occlusal contacts on each complete denture in centric relation were recorded and analyzed, using descriptive statistics.Results: Out of the 207 studied complete dentures, 203 had occlusal contacts.  Among 203 complete dentures, 138 (68%) and 65 (32%) had bilateral and unilateral occlusal contacts, respectively. The total number of occlusal contacts was 713 with a range of 1-14. The mean number of occlusal contacts was 3.44 ± 2.29Conclusion: The results suggest that the number of occlusal contacts of remounted complete dentures before occlusal adjustments by articulating paper was low, the posterior teeth did not meet evenly all around the arch at the first contact, and delivery of such complete dentures may lead to occlusal error and unstable complete denture.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43611.html}, eprint = {https://dentjods.sums.ac.ir/article_43611_57a3e17f3ecd5c94ee75df777485882f.pdf} } @article { author = {Heshmat, H. and Alavi, G. and Niknam, M. and Alavi, AA.}, title = {Effect of Composite Elasticity and Filler Concentration on Shear Bond Strength of Composite to Dentin}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {6-12}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43619}, 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.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43619.html}, eprint = {https://dentjods.sums.ac.ir/article_43619_8694052d21ded749bb3f9aeb7edb91b3.pdf} } @article { author = {Talebi, M. and Saraf, A. and Ebrahimi, M. and Mahmodi, E.}, title = {Dental Erosion and Its Risk Factors in 12-year-old School Children in Mashhad}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {13-18}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43612}, 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.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43612.html}, eprint = {https://dentjods.sums.ac.ir/article_43612_29858ab5ff4ae4168eca379b19e65440.pdf} } @article { author = {Vojdani, M. and Zibaei, M. and Khaledi, AAR. and Zomorodian, K. and Ranjbar, MA. and Boshehri, S.}, title = {In- vitro Study of the Effect of Clotrimazole Incorporation into Silicone Soft Liner on Fungal Colonization}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {19-23}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43613}, 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 (Sc1, Sc30, Sc60) and without clotrimazole (S1, S30, S60) 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 mm2 for the specimens without clotrimazole after water storage and washing with wet cotton for 1, 30 and 60 days was 6.5Î106, 5.8Î106 and 6.1Î106, respectively. CFU for specimens with clotrimazole decreased significantly to 2.6Î106 and 3.9Î106 and 4.6Î106 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.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43613.html}, eprint = {https://dentjods.sums.ac.ir/article_43613_fbe86d950dfc7a60d1a64fec5bec6569.pdf} } @article { author = {Mortazavi, V. and Fathi, MH. and Ataei, E. and Khodaeian, N.}, title = {The Effect of 15% Carbamide Peroxide Bleaching on the Shear Bond Strength of Composite to Enamel}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {24-30}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43614}, abstract = {Statement of problem: Carbamide peroxide bleaching has been implicated to adversely affect the bond strength of composite to enamel.purpose: The purpose of this study was to evaluate the effect of carbamide peroxide bleaching on the shear bond strength of composite to bleached enamel bonded with a three step total etch system; Scotchbond Multipurpose(SBMP), and two simplified all-in-one systems; Prompt L-Pop (PLP) and i bond.Materials and Methods: Seventy two human molar teeth were randomly assigned to three control and three experimental groups. The experimental groups were subjected to a %15 carbamide peroxide bleaching system. Twenty four hours later, all the control and experimental groups were bonded with cylinders of composite, using three dental bonding agents. After thermocycling, shear bond strengths were determined by a universal testing machine. The data were evaluated using one way ANOVA and Duncan tests (P<0.05).Results: The composite bond strengths of SBMP were 19.52±5.21 MPa to the unbleached and 7.95±4.16 MPa to the bleached enamel. For PLP, the unbleached enamel exhibited bond strengths of 9.66±2.89 MPa and, the bleached one showed a bond strength value of 5.39±0.66 MPa. For i-bond the composite bond strengths were 11.46±4.31 MPa to the unbleached and 6.41±2.01 MPa to the bleached enamel. There was a statistically significant difference between the shear bond strength of the control and experimental groups of each dental bonding agent (SBMP, P<0.001, PLP, P<0.001, i bond: P=0.002).Conclusion: Bleaching with 15% carbamide peroxide used in this study reduced the bond strengths of the composite to the enamel bonded with a three step total etch and two simplified one step all-in-one dental bonding agents.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43614.html}, eprint = {https://dentjods.sums.ac.ir/article_43614_4c0f42f8edfff159650f9bafce9a69c5.pdf} } @article { author = {Ebrahimi, H. and Pourshahidi, S. and Andisheh Tadbir, A.}, title = {The Effect of Citalopram and Colonazpam on Burning Mouth Syndrome}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {31-34}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43615}, abstract = {Statement of problem: Psychosocial factors are thought to play a role in burning mouth syndrome (BMS) and several therapeutic approaches for BMS are based on this consideration.Purpose: This paper evaluated the efficacy of the combined systemic administration of citalopram and clonazepam, as anti-depressant and anti-anxiety drugs, in the management of burning mouth syndrome and reduction of the burning sensation.Materials and Method: In this cross-sectional study, 80 subjects suffering from idiopathic burning mouth syndrome were enrolled. The patients underwent a thorough clinical examination. Oral symptoms before and after treatment were assessed using a Visual Analogue Scale. The mean duration of burning in our patients was 7 months. Systemic combination of citalopram (20 mg/daily) and clonazpam (0.25 mg/daily) was prescribed for all of them for 8 weeks. Then, the data were analysed, using Student’s t-test.Results: Of the 62 patients who completed the protocol, 38 reported complete remission of the oral burning sensation. However, 20 patients reported a little improvement, and four of them reported no improvement.Conclusion: These data suggest that citaloperam with colonazpam is effective in patients with BMS}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43615.html}, eprint = {https://dentjods.sums.ac.ir/article_43615_9e57f51aa4ace0d3c71cdca21e9aaf2b.pdf} } @article { author = {Nikzad, S. and Azari, A. and Khodamoradi, N.}, title = {Shear Bond Strength of a Veneering Resin to a Ni-Cr Alloy Using Two Different Surface Treatment Methods}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {35-40}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43616}, abstract = {Statement of Problems: A strong and stable bond between veneering materials and metal framework considerably promotes the aesthetic appearance and clinical longevity of a resin type restoration. Various adhesive metal primers have also been studied to enhance the bond strength of the composite resins to different metal surfaces.Purpose: The purpose of the present study was to evaluate the shear bond strength of one laboratory composite resin bonded to a Ni–Cr alloy by means of two different methods.Materials and Methods: In this study, 24 wax disks were cast and divided into two equal groups. In the first group, a metal primer was applied to the casting surface, while an opaque porcelain material was used for the second group. After application of the veneering composite resin to the treated surfaces, the specimens were stored in a 37ºC water bath for 15 days. At the end of this period, all the specimens were subjected to 1200 thermal cycles (5ºC and 55 OC) and then tested for shear strength in a universal testing machine at a crosshead speed of 0.5 mm/min. Fractured specimens were examined, using a scanning electron microscope.Results: The opaque porcelain group demonstrated higher bond strength (17.55±3.33 Mpa) in comparison to the metal primed surface (15±4.25 Mpa). However, no statistically significant difference was found between the specimens treated with metal primer and those treated with opaque porcelain. The two alloy surface treatments exhibited mixed failures, however. While the nature of failure for opaque porcelain was predominately cohesive, the failure for the metal primed group was adhesive.Conclusion: It can be concluded that both techniques have potential to significantly improve resin–alloy shear bond strength.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43616.html}, eprint = {https://dentjods.sums.ac.ir/article_43616_652c6a84e660d4a92f1baa2a98e3fce3.pdf} } @article { author = {Pakfetrat, A. and Sanatkhani, M. and Bidram, F. and Baghaee, B.}, title = {Chronic Mucocutaneous Candidiasis Associated with Osteogenesis Imperfecta: A Case Report}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {41-44}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43617}, 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.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43617.html}, eprint = {https://dentjods.sums.ac.ir/article_43617_b23d18a44a12ebf728bdb57940f308ec.pdf} } @article { author = {Mashhadi Abbas, F. and Moshref, F. and Sargolzaie, S. and Kargahi, N.}, title = {Ameloblastomatous Calcifying Cystic Odontogenic Tumor: A Rare Histologic Variant}, journal = {Journal of Dentistry}, volume = {9}, number = {Supplement 2008}, pages = {45-48}, year = {2008}, publisher = {Shiraz University of Medical Sciences}, issn = {2345-6485}, eissn = {2345-6418}, doi = {10.30476/dentjods.2019.43618}, 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.}, keywords = {}, url = {https://dentjods.sums.ac.ir/article_43618.html}, eprint = {https://dentjods.sums.ac.ir/article_43618_28d8b2f715bdb021c774844a2a089e95.pdf} }