@article{ author = {editor, editor}, title = {Announcement of Retraction}, abstract ={The editorial office of the Journal of Islamic Dental Association of Iran has recently determined that an original article entitled “Stress Distribution in Three-Implant- Retained Mandibular Overdentures Using Finite Element Analysis” authored by Ahmadzadeh A, Golmohammadi F, Mousavi N, Epakchi S. published in thewinter 2015 issue of the Journal of Islamic Dental Association of Iran [Journal of Islamic Dental Association of IRAN (JIDAI). 2015;27(1):1.] was subsequently found to have publishing misconduct as well as duplication. Therefore, we hereby notify our readers that this paper was officially retracted.}, Keywords = {}, volume = {27}, Number = {2}, pages = {1-1}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1747-en.html}, eprint = {http://jida.ir/article-1-1747-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {Ahmadzadeh, Asadollah and Golmohammadi, Farnoosh and Mousavi, Najmeh}, title = {Effect of marginal design on fracture resistance of IPS e.maxall ceramic restorations: Chamfer versus shoulder finish lines}, abstract ={Background and Aim: One of the problems of all ceramic restorations is their risk of fracture due to occlusal loads. The aim of the present study was to compare the effect of two marginal designs (shoulder and chamfer) on the fracture resistance of IPS-emax all ceramic restorations. Materials and Methods: One extracted maxillary first premolar received chamfer 50' marginal preparation (0.8 mm). Twenty impressions were made using poly vinyl siloxane. Then, chamfer was converted to shoulder 90'(1mm). After impression, epoxy resin dies were fabricated. Impressions of each epoxy resin die were made and poured with die stone. Twenty Press crowns and twenty ZirCAD crowns were made on stone dies and ce-mented on resin dies. Then, samples underwent a fracture test in a universal testing ma-chine. Data were analyzed by one-way ANOVA. Results: The mean fracture resistance was 1426N for the chamfer ZirCAD samples, 1361.3N for the shoulder ZirCAD samples, 1059.9N for the chamfer Press samples and 1295.8N for the shoulder Press samples. One-way ANOVA revealed no difference among groups. (p=0.095). Conclusion: After porcelain application, marginal design does not affect fracture resis-tance of single IPS-emax posterior crowns. Fracture resistance was approximately the same in Press and ZirPress groups probably due to porcelain application, because in Zir-CAD group fractures occurred in the porcelain prior to the core}, Keywords = {Chamfer, Shoulder, Fracture resistance, All ceramic, IPS emax}, volume = {27}, Number = {2}, pages = {64-69}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1739-en.html}, eprint = {http://jida.ir/article-1-1739-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {NuriSari, Mohsen and Rahmani, Nafiseh and AraghbidiKashani, Mehdi and EslamiAmirabadi, Gholamreza and AkbariSari, Ali and Seyedtabaii, Elahe}, title = {Effect of Incorporation of Nano-Hydroxyapatite and Nano-Zinc Oxide in Resin Modified Glass Ionomer Cement on Metal Bracket Debonding}, abstract ={Background and Aim: Use of fluoride releasing materials to decrease the risk of demine-ralization around orthodontic brackets would be reasonable as an adhesive for bracket bonding only if they provide acceptable shear bond strength (SBS). The aim of this study was to evaluate the SBS of resin-modified glass ionomer cements (RMGICs) modified by nano-zinc oxide (NZnO) and nano- hydroxyapatite (NHA) in comparison with composite resins. Materials and Methods: In this experimental study, 80 extracted human premolars were used. The teeth were randomly divided into 4 groups as follows: Group 1: Trans bond XT as a control group, Group 2: RMGIC (Fuji II LC), Group 3: RMGIC with5% NHA and Group 4: RMGIC with2% NZnO. After etching the enamel, brackets were bonded. The SBS was measured for each group. The percentage of adhesive remnants on the enamel surface was quantified using the adhesive remnant index (ARI).The data were analyzed using one-way ANOVA and the Kruskal Wallis test. Results: According to the results of ANOVA, no significant difference was found in theSBS of groups (p=0.075). The mean shear bond strength in groups 1 to 4 was 15.43 ± 4.61, 14.95 ± 4.34, 17.97 ± 3.65 and 17.08 ± 3.59, respectively. According to the Kruskal-Wallis test, there was no significant difference in ARI score among the groups (p=0.413). Conclusion: The amount of SBS was similar among all groups and addition of NZnO and NHA particles had no negative effect on SBS of RMGIC. Less than half the adhesive re-mained on the enamel surface after bond failure in all groups.}, Keywords = {Resin modified glass ionomer cement, Nanohydroxyapatite, Nano-zinc oxide, Shear bond strength }, volume = {27}, Number = {2}, pages = {70-76}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1740-en.html}, eprint = {http://jida.ir/article-1-1740-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {HashemiKamangar, Sedigheh and Kiakojoori, Kiyana and Mirzaii, Mansoreh and Kharazifard, Mohammadjav}, title = {Comparison of Color Change of Silorane and Methacrylate-Based Composites Due to Bleaching}, abstract ={Background and Aim: Bleaching agents differently affect the color of composite restorations. This study aimed to assess the effect of two different bleaching agents on color change of silorane-based and two types of methacrylate-based composites. Materials and Methods: This in-vitro study was conducted on 18 disc-shaped specimens measuring 10×2mm made of A3 shade of Z250, Z350 and P90 composites. The speci-mens were randomly divided into three groups (n=6). Group one or control samples were stored in distilled water. Groups two and three were subjected to bleaching with 16% and 35% carbamide peroxide (CP) (Kimia, Chemident, Iran). Color parameters of specimens were measured before and after bleaching using the CIE L*a*b* system and a spectrophotometer. Data were analyzed using repeated measures ANOVA and Tukey’s HSD test for multiple comparisons. Results: The mean and standard deviation (SD) of total color change (&DeltaE) of Z250 in dis-tilled water, 16% carbamide peroxide and 35% carbamide peroxide was 3.48±1.43, 4.55±1.7 and 4.17±1.9, respectively. These values were 4.33±2.41, 4.94±2.23 and 4.25±1.65 for Z350 and 4.97±2.47, 5.28±1.67 and 3.41±2.26 for P90, respectively. Conclusion: In general, the color change of microhybrid, nanofilled and silorane-based composites following bleaching with different bleaching agents was clinically perceivable.}, Keywords = {Bleaching, Silorane-based composite, Color, Methacrylate-based composite }, volume = {27}, Number = {2}, pages = {77-84}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1741-en.html}, eprint = {http://jida.ir/article-1-1741-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {Aghasadeghi, Mohammad reza and Arami, Sakine and HasaniTabatabaie, Masomeh and Darvishpour, Hojjat and Kharazifard, Mohammad javad and Sarlak, Hami}, title = {Efficacy of Four Disinfectants Against Hepatitis B Virus}, abstract ={Background and Aim: Hepatitis B virus (HBV) is an important infectious agent in denti-stry necessitating the use of disinfectants to prevent its transmission. This study compared the efficacy of 2/100 sodium hypochlorite disinfectants prepared from 5% solution manufactured by four different manufacturers namely Ashimashi, Paknaz, Vitex and Active for disinfection of surfaces infected with HBV. Materials and Methods: In this in vitro experimental study, sera of 10 hepatitis B pa-tients were poured into microtubes and 2/100 sodium hypochlorite solutions prepared from 5% Ashimashi, Paknaz, Vitex and Active disinfectants were added to them in 1/1 ratio. Polymerase chain reaction (PCR) was performed using virus diagnostic kits to detect the viral genome. Real-time PCR was performed before and after incubation with the disinfectants to assess the viral load in the serum. The reduction in the viral load of HBV was statistically analyzed by Kruskal-Wallis and Mann-Whitney U tests. Results: No significant antiviral efficacy was noted following the application of Ashima-shi 2/100 sodium hypochlorite disinfectant. Paknaz showed the highest efficacy against HBV. Vitex and Active ranked next with significant differences (P<0.0001) Conclusion: Under the study limitations, Paknaz 2/100 sodium hypochlorite solution was the most effective while Ashimashi 2/100 sodium hypochlorite disinfectant did not show adequate efficacy against HBV.}, Keywords = {Hepatitis B, Disinfection, Surface, Dentistry}, volume = {27}, Number = {2}, pages = {85-89}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1742-en.html}, eprint = {http://jida.ir/article-1-1742-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {ZareJahromi, Maryam and Mirzakouchaki, Parvin and Mirsatari, Sanaz and Kazemi, Shadi}, title = {Effect of Triple Antibiotic Paste on Bond Strength of Composite to Dentin: An In Vitro Study}, abstract ={Background and Aim: Considering the increasing use of antibiotics in root canal therapy and the possible effects of intracanal medicaments on the bond strength of composite restorations, the aim of this study was to evaluate the effect of triple antibiotic paste (TAP) on shear bond strength of three types of composite resins to dentin. Materials and Methods: In this in-vitro, experimental study, the enamel of 60 extracted premolars was ground parallel to the longitudinal axis of the teeth in order to produce flat dentin surfaces (5 mm2 minimum surface area). The samples were divided into six groups. In the control group, dentin surfaces were stored in saline solution and in the experimental groups dentin surfaces were exposed to TAP for 10 days. After washing and drying, Single Bond was applied for dentin bond to Z100 and Z350 composites. Adhesive resin was used for bond to P90 composite. Composites were applied on the dentin surfaces in six groups and cured in four directions. The shear bond strength was measured by Instron machine. The data were analyzed by t-test, one-way ANOVA and Tukey’s test. Results: The highest mean shear bond strength was found in Z350 composite group following the use of TAP (38.75 MPa) and the lowest mean strength was found in Z100 composite group following the use of TAP (14.64 MPa). The mean shear bond strength of P90 and Z100 composites (in contrast to Z350 composite) was higher in the saline compared to the TAP groups (p=0.1). The differences between saline and antibiotic groups were not significant (p=0.959) but the difference in this regard among the three types of composites was significant. Conclusion: The results of this study showed that use of TAP has no effect on the shear bond strength of composite to dentin but the type of composite significantly affects the shear bond strength.}, Keywords = {Triple Antibiotic Paste, Composite, Shear Bond }, volume = {27}, Number = {2}, pages = {90-96}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1743-en.html}, eprint = {http://jida.ir/article-1-1743-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {Karamie, Maryam and Shirani, Farzaneh and Kaveh, Sara and Talaee, Sanam and Salehi, Ehs}, title = {Shear Bond Strength of Composite to Primary Enamel Treated with Casein Phosphopeptide Amorphous Calcium Phosphate Using Total-Etch and Self-Etch Bonding Systems}, abstract ={Background and Aim: By application of casein phosphopeptide amorphous calcium phosphate (CPP-ACP) as a remineralizing agent, it may be feasible to only remove the carious dentin and better preserve the tooth structure. This study aimed to assess the shear bond strength of composite to primary enamel treated with CPP-ACP using total-etch and self-etch bonding systems. Materials and Methods: This in vitro experimental study was conducted on 96 sound primary teeth randomly divided into 8 groups (n=12). Four groups were demineralized and the rest remained sound. All the specimens were subjected to pH cycling. Then, GC-Tooth Mousse was applied on their surfaces. Composite resin was bonded using Clearfil SE Bond self-etch or Single Bond total-etch bonding systems. The bond strength of the specimens was measured by an Instron machineand the mode of fracture was assessed by a stereomicroscope. Data were analyzed by one-way and two-way ANOVA and chi-square test. Results: In the total-etch system, the bond strength of demineralized group was signifi-cantly higher than that of sound group (p=0.009). This difference in self-etch system was not significant (p=0.928). The CPP-ACP remineralizing agent decreased the bond strength in total-etch and increased the bond strength in self-etch group (p=0.032 and p=0.018, respectively). No difference was observed in the mode of fracture of the two bonding sys-tems. Conclusion: GC Tooth Mousse decreased the bond strength to composite in total-etch and increased it in self-etch group. Higher bond strength to composite can be achieved in teeth with white spot lesions (WSLs) when total-etch system is used.}, Keywords = {Primary teeth, Enamel, Remineralization, White spot lesion, Total-etch, Self-etch }, volume = {27}, Number = {2}, pages = {97-103}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1744-en.html}, eprint = {http://jida.ir/article-1-1744-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {Bolandian, Pantea and Rajabi, Reza and Alizadeh, Mohammad hosain and Sohrabi, Ahmad and Miri, Hadi and Bolandian, Anahit}, title = {Efficacy of Eight weeks of Exercise Therapy for Neck Pain among General Dentists}, abstract ={Background and Aim: The prevalence of musculoskeletal complaints is high among dentists however, only a few studies have focused on this topic. The aim of this study was to assess the efficacy of an exercise program for neck pain relief in dentists practicing in Tehran. Materials and Methods: A questionnaire was administered among 46 dentists in Tehran matched by age, gender (all males) and neck pain complaints in the past six months. Sub-jects were randomly divided into two groups. The first group received exercise therapy while the second group was given no exercise. Pain was measured at two months after the intervention using the visual analog scale (VAS). Data were analyzed using t-test and P<0.05 was considered statistically significant. Results: The t-test showed significant improvement of neck pain in the first group after the intervention (p<0.05). Conclusion: The results showed that exercise therapy could be effective for treatment of neck pain. Therefore, regular exercise by dentists can prevent neck pain and other muscu-loskeletal disorders (MSDs).}, Keywords = {Exercise therapy, Neck pain, General dentists }, volume = {27}, Number = {2}, pages = {104-108}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1745-en.html}, eprint = {http://jida.ir/article-1-1745-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} } @article{ author = {Shayegh, Shojaedin and Salari, Ali mohammad and Ayoubi, Mohsen and Younesi, Farz}, title = {Effect of Three Types of Temporary Luting Cements and Abutment Surface Sandblasting on Retentive Strength of Implant-Supported Fixed Prostheses}, abstract ={Background and Aim: Achieving appropriate retention and easy retrieva bility at the same time is challenging in implant-supported fixed par tial dentures (FPDs). Researchers have always been in search of a temporary cement to improve the retentive strength. The aim of this in vitro study was to evaluate the effect of three different temporary ce ments and sandblasting of the abutment surface on the retentive strength of implant- supported fixed prostheses. Materials and Methods: In this experimental study, 10 DIO implant analogues were mounted in acrylic resin. Twenty abutments were divided into two groups of 10. The ab-utments in groupone were used in their intact standard form while those in group two were sandblasted. Sixty metal copings were fabricated and cemented on abutmentsof each group usingthree types of temporary cements namely Kerr, Provyand GC. Specimens were subjected toa universal testing machine to measure their retentive strength.The re-sults were analyzed by two-way ANOVA and pairwise comparison was performed using-Tukey’s post-hoc test. Results: The retentive strength of TempBond (Kerr) with sandblasted abutments was sig-nificantly higher than that of the other two cements (p<0.001). In standard abutments, Provy had slightly but not significantly higher retentive strength. The lowest values in both abutment groups were obtained by GC cement. Conclusion: Kerr TempBond cement with sandblasted abutments yields the highestreten-tive strength.}, Keywords = {Retention, Cement, Surface properties, Implant-supported prosthesis }, volume = {27}, Number = {2}, pages = {109-115}, publisher = {Journal of Iranian Dental Association}, url = {http://jida.ir/article-1-1746-en.html}, eprint = {http://jida.ir/article-1-1746-en.pdf}, journal = {Journal of Iranian Dental Association}, issn = {2383-3041}, eissn = {}, year = {2015} }