2024-03-29T12:31:42+03:30 http://jrds.ir/browse.php?mag_id=26&slc_lang=fa&sid=1
26-525 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 The Effect of Different Surface Treatments on Flexural Strength and Modulus of Elasticity of Fiber Posts MR Maleki pour SA Sharafi alasharafi@yahoo.com F SHirani ABSTRACT  Background and Aim: The aim of this study was to evaluate the effect of various surface treatments on flexural strength and modulus of elasticity of two different types of glass fiber and quartz fiber posts. Materials and Methods: In this experimental in vitro study eighty FRC posts of two different types: forty DT-light posts (quartz fiber) and forty Whitepost DC (glass fiber), were used and randomly divided into 4 groups (n=10): 1. No surface treatment (control), 2. Laser irradiation, 3. Air-born particle abrasion, 4. Hydrogen peroxide 10%. To evaluate flexural strength and modulus of elasticity, 3-point bending test was performed in universal machine in Torabinejad searching center of dental school of Isfahan University and maximum fracture load was recorded. Then flexural strength and modulus of elasticity were calculated with formula. Data were analyzed by one-way ANOVA, Tukey and t tests.  Results: Before surface treatment the flexural strength and modulus of elasticity of DT- light posts were significantly higher that Withepost DC (p<0.05). There was no significant difference in flexural strength and modulus of elasticity between different groups of Withepost DC with control group (p=0.16 & p=0.15, respectively). But in DT-light posts there were statistical significant differences in flexural strength and modulus of elasticity only between air-abraded group and control. (p=0.02 & p=0.002, respectively)  Conclusions: Surface pretreatments of glass and quartz fiber posts with laser and hydrogen peroxide 10% have no adverse effect on their flexural strength and modulus of elasticity. Key words: Fiber post, Surface Treatment, 3-Point Bending Test, elastic Modulus Fiber post Surface Treatment 3-Point Bending Test elastic Modulus 2015 10 01 101 107 http://jrds.ir/article-1-525-en.pdf
26-635 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Evaluation of Fiber Tape Placement effect on Fracture Resistance of Incisal Composite Restoration of Anterior Teeth in Various Thicknesses. (In-vitro) E AminSalehi M Norozy monanorozy@yahoo.com S Arab Karami ABSTRACT  Background and Aim: Crown fracture is one of the most prevalent dental problems. With the development of composites and adhesives, Conservative approaches is proposed to treat this type of fractures. The aim of this in-vitro study was to investigate the effect of the one fiber tape on the fracture resistance of the incisal composite restoration with different thicknesses. Materials and Methods: In this In vitro Experimental study forty extracted upper incisor were selected and randomly divided into four groups. Group 1 and 3 were prepared by cutting 3 mm of the incisal edges horizontally and restored with hybrid composite. Group 2 and 4 were prepared by cutting 4mm of the incisal edges horizontally and restored with hybrid composite and fiber in the mid-palatal surface. All specimens were mounted in acrylic blocks and after that they thermocycled. All the restored teeth were set as 135 degree angle and statically loaded by Zwick until they fractured. The data were analyzed using Two way ANOVA statistical analyze.  Results: The mean fracture resistance of the groups 1 to 4 were: 436±242, 492±195, 917±353, 1053±254. Results showed that the fracture resistance between groups with thicknesses of 3 mm and 4 mm weren’t statistically significant Regardless of the presence or absence of fiber tape (P=0.263) but The restorations with fiber showed significantly higher fracture resistance than non-reinforced restorations. (P=0.000)  Conclusion: Based on the findings of this study can be concluded that placement of fiber tape in the incisal edge composite restoration of anterior teeth Can be effective in increasing the fracture resistance of these restorations. Keywords:Tooth fracture, Composite resins, Polyethylene Glycol Tooth fracture Composite resins Polyethylene Glycol 2015 10 01 108 113 http://jrds.ir/article-1-635-en.pdf
26-536 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Comparison of Microleakage of Concise Fissure Sealant after Curing by Different Methods: In ‏vitro study SH Mirzabeigy sh.mirzabeigy@yahoo.com L Rezaei Soufi T Masoum ABSTRACT  Background and Aim: Ability of sealants in prevention of micro leakage is important. The role of sealant polymerization for this is essential .It is suggested that stress caused by polymerization may deceased by soft-start technique. The aim of this study is to evaluate the effect of full-power, low power and soft start technique on micro leakage of concise fissure sealant. Materials and Methods: In this experimental in vitro study, 45 human premolars divided in to 3 groups each containing15 teeth .All teeth after etching, sealed by concise fissure sealant .group 1 cured by full power method, group 2 by low power method and group 3 by soft start method .After immersion in basic fouchin solution, teeth were sectioned and assessed by stereo micro scope .the data were analyzed by Kruskal Wallis test.  Results: %6/7 of specimens had no micro leakage in full power group. Micro leakage occurred in all of specimens of low power group.in soft start group %13/3 of specimens had no leakage.  Conclusion: There were no different in micro leakage of fissure sealant cured by each of curing methods.  Keywords: Dental, Light curing, Fissure Sealants, P.T, Leakage Dental Light curing Fissure Sealants P.T Leakage 2015 10 01 114 119 http://jrds.ir/article-1-536-en.pdf
26-661 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Clinical Evaluation of Posterior Resin Composite and Glass Ionomer Cement Restorations in Primary Teeth: 18-Month Results M SHokrimozhdehi maryam.shokrimozhdehi@yahoo.com N Ahmadi Rouzbahani laila Pishevaresfahani ABSTRACT  Background and Aim: Recently, within the efforts to improve the properties of glass ionomer cement as a restorative material in dentistry the EQUIA glass ionomer cements is introduced. The purpose of this study is to perform a clinical evaluation of (Japanese) (EQUIA Fill, GC) glass ionomer cement with (Americans) 3M Filtek P60 posterior composites during the follow-up period of 6, 12 and 18 months.  Materials and Methods: In this clinical trial study, 50 children aged 4 to 9 years with small to medium caries lesions on the occlusal surfaces of the mandibular second primary molars were enrolled and randomly their teeth restored with 3M Filtek P60 posterior composite and GI EQUIA . Then, during 6, 12 and 18 months, clinical assessment was done on each restored tooth and according to the USPHS criteria, the marginal integration, color match, marginal discoloration, anatomic form and secondary caries were recorded. Data were analyzed through Wilcoxon and Friedman non-parametric statistical tests.  Results: At the end of an 18-month follow-up period, the difference between the effect of both restorative materials on color matching, (P=0.317) marginal adaptation, (P=0.414) anatomic form (P=0.317), marginal discoloration, (P=0.564) and secondary caries was not statistically significant. Clinical success rates were similar and acceptable in both restorative materials in different periods. But difference in loss of marginal adaptation was significant after 12 months. (P<0.001)  Conclusions: The use of 3M Filtek P60 posterior composite and EQUIA glass ionomer cements to restore the primary molars of children is clinically successful.   Keywords: Deciduous Teeth, Filtek P60 Composite, Site Resins. Deciduous Teeth Filtek P60 Composite Site Resins. 2015 10 01 120 126 http://jrds.ir/article-1-661-en.pdf
26-638 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Trends in reasons for Extraction of Permanent Teeth in an Iranian Population, A 13-year follow-up Study M Jafarian A Etebarian arghavan.etebarian@gmail.com N Valai ABSTRACT  Background and Aim: Due to substantial proportions of prevalence and complication of teeth extraction, this study, was designed to establish whether the reasons for tooth loss have changed during 13 years evaluation.  Materials and Methods: Dental practitioners were asked to record patient’s demographic information, history of smoking, time of last dental visits, having a previous dental extraction, number of teeth loss and reasons for the extraction for a period of 6 months in two time periods (1997-1998) on1800 patients including 1143 males and 657 females and 2010-2011) on 1382 patients including 673 males and 709 females.  Results: The results of this study confirmed that there has been a reduction of tooth extraction due to periodontal disease and pre-prosthetic reasons while caries and malocclusion indications remain the same during the 13 years. Malocclusion has become the most common reason for tooth extraction among patients less than 21 years of age while caries was the main cause of tooth loss in this age group 13 years ago.  Conclusion: Persistence of Caries as the most important cause of tooth loss after 21 years old during 13 years evaluation results in deficiency of oral & maxillofacial disease prevention in our country.   Key words: Tooth Extraction, Dental Decay, Periodontal Disease, Dental Care Plan. Tooth Extraction Dental Decay Periodontal Disease Dental Care Plan. 2015 10 01 127 132 http://jrds.ir/article-1-638-en.pdf
26-627 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 The Epidemiology of oral,head and neck malignant melanoma in an Iranian population during 11 –year perio N SHamloo Y Safi N_shamloo@yahoo.com AR GHanadan SH Ppooryan Abstract:  Background and Aim: Melanoma is a malignant neoplasm of melanocytic origin that arises from a benign melanocytic lesion or denovo from melanocytes within otherwise normal skin or mucosa. Oral mucosal melanoma is much less than %1of all melanomas. Mucosal melanoma is much more aggressive than its cutaneous counterpart. Due to a real increase in the frequency of melanoma in recent years, we investigate the prevalence of malignant melanoma in the mouth ,head and neck during a 11 years period in Iranian population.  Materials and Methods: This study was done on the pathology records of patients admitted to the Department of Pathology, School of Dentistry Shahid Beheshti ,Lughman Hakim, Shohada,Taleghani hospitals and Institute cancer of Imam Khomeini. In this study the variables like gender, age, location of the lesion, recurrence and metastasis was evaluated. The chi-square test was used to analyze information obtained from the research.  Results: Of the 191679 cases accessed during the 11-year period, 262(0.14%) were identified as oral& maxillofacial malignant melanomas. The average age of melanoma was 50+-11/01years and the incidence in men was higher than women. The most common clinical feature was discoloration (46.9%)and then was ulceration (18.6%).Of all cases 24.8% had metastases. The most common site was the neck and cheek, and the most common area in the mouth, was reported in palate.  Conclusion: Frequency of head and neck melanoma was 0.14% of all studied cases. The most common and the least common sites were neck and chin, respectively. Most cases of oral melanoma were localized in the palate and the incidence in men was higher than women.  Key words: Frequency, Melanoma, Malignant, , Oral Cancer Frequency Melanoma Malignant Oral Cancer 2015 10 01 133 136 http://jrds.ir/article-1-627-en.pdf
26-628 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Failure assessment of pediatric dental treatment under general anesthesia E KHodadadi S KHafari F Kuhestany drfarnaz.k@gmail.com Abstract:  Background and Aim: Due to the dramatic increase in dental treatment under general anesthesia and the potential risks and the need for a quality and durable treatment, the study aims to investigate the failure of dental treatment under general anesthesia  Materials and Methods: This descriptive cross-sectional studywas carried out on 114 healthy children from systemically due to lack of cooperation and S-ECC at the Hospital Clinic of Babol had received dental treatment under general anesthesia in 1388-1392 and At least 6 months pasts after the last treatment. The information was collected by dentistry mirror and explorer on children through clinical examination and the medical records of each patient were recorded. Data analysis was performed by spss18. To compare the impact of different factors on the failure of Restoration the Chi-square test was used  Results: Pulp treatment had high successful rate of 100% for pulpectomy and 96.9% for pulpotomy. ssc restoration had the least ( 5.2 % ) and posterior composite restorations had the most common failure rate (13.3%). Among anterior restorations, composite CL I and composite build us had the least and the most common failure rates, respectively. (6.8% and 9.8%) Significant difference between the SSC and 3 surface post composite was found (P=0.04) The relationship between maternal education and fluoride therapy sessions -up with the rate of treatment failure was observed . (p = 0.001,p = 0.0001)  Conclusion: Pulpectomy and SCC restorations were the most successful treatments. It is recommended to limit the use of composite restorations in anterior teeth and posterior teeth restored with stainless steel crowns. Treatment success is not only the success of restorations But the knowledge and education of parents, especially mothers and use of fluoride also plays an important role in the future success of the treatment of caries.   Key words: Dental Care, General Anesthesia, Hospital, Pediatric, Hospital Dental, Service. Dental Care General Anesthesia Hospital Pediatric Hospital Dental Service. 2015 10 01 137 144 http://jrds.ir/article-1-628-en.pdf
26-641 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Effect of two different position in MINB injection on anxiety E Lasemi T kermani ranjbar F Askari farzaneh_br22000@yahoo.co.in F Askari Abstract:  Background and Aim: The placement of dentist during injection is effective on patient’s anxiety. So this research was conducted to compare the effect of standing in front or behind the patient while administering MINB injection on patient’s anxiety at the surgery department of Dental branch of Islamic Azad University in 1392-93.  Materials and Methods: In this randomized splitmouth clinical trial study, 40 adults with complete awareness of study procedure, were entered in to the study. The patient’s anxiety was determined by a 17item BISS questionnaire .The patients were allocated to the case (injection from behind) and controls (injection from the front) groups by a randomized method. The effect of operator position during injection on the anxiety of patients, was measured at the end of injections and the rate of anxiety was determined. The data was analyzed using MANN-U- WHITNEY test by SPSS version 20.  Results: The mean changes of anxiety score after injection versus patients statements before injection in group that their injection was from behind, 0.85±0.12 reduced and in the group whose injection was from the front, 0.4±0.74 increased. (P=0.007)  Conclusion: Probably the patient’s anxiety in MINB injection, for groups whose injection was from behind, was significantly lower than patients whose injections was from front.  Keywords: Dentist Patient Relations, Injection, Anxieties, Dental. Dentist Patient Relations Injection Anxieties Dental. 2015 10 01 145 148 http://jrds.ir/article-1-641-en.pdf
26-665 2024-03-29 10.1002
Res Dent Sci J Res Dent Sci 2008-4676 2228-7353 10.61186/jrds 2015 12 3 Evaluation of Optimal Anticoagulation (Heart Valve –Stents-Atrial fibrillation…) Regime in Patients Who Need Dentistry Intervention: Review of Article AA Moeinpour M GHarahchahi AR SepehriSHmaloo gharehchahim@mums.ac.ir A Safari Soltan Abad H Hoseinikhah hoseinikhahh@mums.ac.ir Abstract:  Background and Aim: Today the use of Anticoagulation drugs (Warfarin, Aspirin, Plavix and Ticlopidine) is critical in many cardiac diseases including patients with mechanical Heart Valve Prosthesis and biologic valve (for3months) and Coronary Stents in coronary artery disease. Cessation of this essential drug can cause dismal complications with potential mortality due to thrombosis and embolic events. This is a review of article study that evaluates optimal anticoagulation treatment with minimal risk of hemorrhage and also no cardiovascular complications.  Materials and Method: In the review and papers related to anticoagulation treatment in patients with Prosthetic Heart Valve and any other prosthetic materials who need dentistry intervention, 41articles about various anticoagulation regimes in this type of patients was studied in time of dentistry intervention . These papers were indexed in PubMed and Scopus and Medline from 1966 to 2014.  Conclusion: In the study of published papers most authors believe that in patients who undergo anticoagulation therapy, majority of dentistry procedures can be applied without the need for any change in Anticoagulation regime and complete control of bleeding can be achieved with local hemostasis with expert dentist team in twenty-care center  Keywords: Anticoagulant, Cardiac surgical procedures, Dentistry intervention. Anticoagulant Cardiac surgical procedures Dentistry intervention. 2015 10 01 149 155 http://jrds.ir/article-1-665-en.pdf