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Publisher: Tehran University of Medical Sciences   (Total: 19 journals)   [Sort by number of followers]

Showing 1 - 19 of 19 Journals sorted alphabetically
Academic J. of Surgery     Open Access   (Followers: 16)
Audiology     Open Access   (Followers: 11)
Basic and Clinical Neuroscience     Open Access   (Followers: 6, SJR: 0.272, h-index: 4)
DARU J. of Pharmaceutical Sciences     Open Access   (Followers: 3, SJR: 0.495, h-index: 21)
Dermatology and Cosmetic     Open Access   (Followers: 4)
Hayat : J. of Faculty of Nursing and Midwifery, Tehran University of Medical Sciences     Open Access   (SJR: 0.18, h-index: 3)
Hospital     Open Access   (Followers: 2)
Intl. J. of Hospital Research     Open Access  
Iranian J. of Epidemiology     Open Access   (Followers: 2, SJR: 0.186, h-index: 3)
Iranian J. of Nuclear Medicine     Open Access   (Followers: 1, SJR: 0.196, h-index: 8)
Iranian J. of Public Health     Open Access   (SJR: 0.326, h-index: 20)
J. of Dental Medicine     Open Access   (Followers: 1)
J. of Dentistry of Tehran University of Medical Sciences     Open Access  
J. of Medical Ethics and History of Medicine     Open Access   (Followers: 9, SJR: 0.245, h-index: 4)
J. of Minimally Invasive Surgical Sciences     Open Access  
Medical J. of the Islamic Republic of Iran     Open Access   (Followers: 2, SJR: 0.209, h-index: 6)
Modern Rehabilitation     Open Access   (Followers: 8)
Tehran University Medical J.     Open Access   (Followers: 1, SJR: 0.122, h-index: 6)
Transport Phenomena in Nano and Micro Scales     Open Access  
Journal Cover Journal of Dentistry of Tehran University of Medical Sciences
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   ISSN (Print) 1735-2150 - ISSN (Online) 2008-2185
   Published by Tehran University of Medical Sciences Homepage  [19 journals]
  • Deposition of Crystalline Hydroxyapatite Nanoparticles on Y-TZP Ceramic: A
           Potential Solution to Enhance Bonding Characteristics of Y-TZP Ceramics

    • Authors: Abbas Azari, Sakineh Nikzad Jamnani, Arash Yazdani, Faezeh Atri, Vania Rasaei, Abbas Fazel Anvari Yazdi
      Pages: 62 - 68
      Abstract: Objectives: Many advantages have been attributed to dental zirconia ceramics in terms of mechanical and physical properties; however, the bonding ability of this material to dental structure and/or veneering ceramics has always been a matter of concern. On the other hand, hydroxyapatite (HA) shows excellent biocompatibility and good bonding ability to tooth structure, with mechanically unstable and brittle characteristics, that make it clinically unacceptable for use in high stress bearing areas. The main purpose of this study was to introduce two simple yet practical methods to deposit the crystalline HA nanoparticles on zirconia ceramics. Materials and Methods: zirconia blocks were treated with HA via two different deposition methods namely thermal coating and air abrasion. Specimens were analyzed by scanning electron microscopy, energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD).Results: In both groups, the deposition techniques used were successfully accomplished, while the substrate showed no structural change. However, thermal coating group showed a uniform deposition of crystalline HA but in air abrasion method, there were dispersed thin islands of HA.Conclusions: Thermal coating method has the potential to significantly alter the surface characteristics of zirconia. The simple yet practical nature of the proposed method may be able to shift the bonding paradigm of dental zirconia ceramics. This latter subject needs to be addressed in future investigations.Keywords: Zirconium Oxide; Hydroxyapatites; Dental Bonding; Microscopy, Electron, Scanning; X-Ray Diffraction; Spectrometry, X-Ray Emission
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • Effects of Wet and Dry Finishing and Polishing on Surface Roughness and
           Microhardness of Composite Resins

    • Authors: Negin Nasoohi, Maryam Hoorizad, Seyedeh Farnaz Tabatabaie
      Pages: 69 - 75
      Abstract: Objectives: This study aimed to assess the effect of wet and dry finishing and polishing on microhardness and roughness of microhybrid and nanohybrid composites.Materials and Methods: Thirty samples were fabricated of each of the Polofil Supra and Aelite Aesthetic All-Purpose Body microhybrid and Grandio and Aelite Aesthetic Enamel nanohybrid composite resins. Each group (n=30) was divided into three subgroups of D, W and C (n=10). Finishing and polishing were performed dry in group D and under water coolant in group W. Group C served as the control group and did not receive finishing and polishing. Surface roughness of samples was measured by a profilometer and their hardness was measured by a Vickers hardness tester. Data were analyzed using two-way ANOVA (P<0.05).Results: The smoothest surfaces with the lowest microhardness were obtained under Mylar strip without finishing/polishing for all composites (P<0.0001). The highest surface roughness was recorded for dry finishing/polishing for all composites (P<0.0001). Dry finishing/polishing increased the microhardness of all composites (P<0.0001).Conclusions: Dry finishing and polishing increases the microhardness and surface roughness of microhybrid and nanohybrid composite resins. Keywords: Composite Resins; Dental Polishing; Hardness
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • Effect of Proanthocyanidin, Fluoride and Casein Phosphopeptide Amorphous
           Calcium Phosphate Remineralizing Agents on Microhardness of Demineralized
           Dentin

    • Authors: Zahra Khamverdi, Matin Kordestani, Alireza Soltanian
      Pages: 76 - 83
      Abstract: Objectives: The aim of this study was to evaluate the effect of dentin remineralization using proanthocyanidin (PA), fluoride varnish and casein phosphopeptide amorphous calcium phosphate (CPP-ACP) paste and their various combinations on microhardness of demineralized root dentin.Materials and Methods: One-hundred and twenty freshly extracted sound human premolars were selected and randomly divided into eight groups for dentin treatment as follows. C: Deionized water (control); PA: 6.5% PA solution; F: fluoride varnish (5% NaF, 22600 ppm fluoride); CP: CCP-ACP; PAF: 6.5% PA + fluoride varnish; PACP: 6.5% PA + CCP-ACP; FCP: fluoride varnish + CCP-ACP and PAFCP: 6.5% PA + fluoride varnish + CCP-ACP. All specimens were subjected to Vickers microhardness test (500 g, 10 seconds, 3 points). Data were analyzed using one-way ANOVA and Tukey’s post hoc test. The significance level was set at 0.05. Results: The mean and standard deviation (SD) values of Vickers hardness number (VHN) in groups C, PA, F, CP, PAF, PACP, FCP and PAFCP were 37.39±4.97, 38.68±4.62, 48.28±2.68 ,41.91±3.32, 48.59±2.55, 53.34±2.57, 48.413±4.00 and 55.20±1.82, respectively. Pairwise comparisons of the groups revealed that there was no significant difference between groups C and PA, PA and CP, F and PAF, F and FCP, PAF and FCP, and PACP and FPACP (P>0.05); but significant differences were observed between other groups (P<0.05).Conclusions: The results of this study showed that the tested dentin treatments increased the microhardness of demineralized root dentin except for PA application.Keywords: Dentin; Fluoride; Proanthocyanidin; Remineralization
       
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • One Year Clinical Evaluation of a Low Shrinkage Composite Compared with a
           Packable Composite Resin: A Randomized Clinical Trial

    • Authors: Razieh Hoseinifar, Elaheh Mortazavi-Lahijani, Hassan Mollahassani, Ahmad Ghaderi
      Pages: 84 - 91
      Abstract: Objectives: The aim of this study was to evaluate the clinical performance of a packable and a low shrinkage methacrylate-based composite after one year.Materials and Methods: In this clinical trial, 50 class I or II restorations were placed in 25 patients. Each patient received two restorations. The tested materials were: (I) Filtek P60 + Single Bond 2 and (II) Kalore GC + Single Bond 2. The restorations were evaluated by two independent examiners after one week (baseline), six months and one year according to the modified United States Public Health Service (USPHS) criteria. The evaluated parameters included color match, marginal adaptation, anatomical form, retention, surface texture, postoperative sensitivity, marginal staining and secondary caries. Data were then analyzed using Friedman and conditional (matched) logistic regression tests at P<0.05 level of significance. Results: P60 and Kalore performed similarly at six months and one year (P>0.05). When each composite resin was evaluated independently at baseline and after one year, no statistically significant differences were found except for marginal adaptation (P60) where four restorations were rated Bravo (clinically acceptable). In 8% of restorations, patients expressed postoperative sensitivity.Conclusions: Kalore GC and Filtek P60 showed acceptance clinical performance after one year of service.Keywords: Composite Resins; Dental Marginal Adaptation; Patients
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • One-Year Clinical Success of Embrace Hydrophilic and Helioseal-F
           Hydrophobic Sealants in Permanent First Molars: A Clinical Trial

    • Authors: Nahid Askarizadeh, Haleh Heshmat, Nazanin Zangeneh
      Pages: 92 - 99
      Abstract: Objectives: This study sought to compare the one-year clinical success of a hydrophilic and a hydrophobic fissure sealant in permanent first molars.Materials and Methods: This split-mouth clinical trial was conducted on 23 six to nine year olds who had four fully erupted sound first molars. Helioseal-F and Embrace sealants were randomly applied on the first molars, and follow-ups were scheduled at three, six and 12 months to examine the teeth according to USPHS criteria (retention, marginal adaptation, color match, surface smoothness and caries recurrence). The Wilcoxon signed rank test, the Friedman test and the Mann Whitney test were applied for statistical analyses (P<0.05).Results: No significant differences were noted between Embrace and Helioseal-F in retention, smoothness of surface, marginal adaptation, color match or caries at three, six or 12 months (all P>0.05). In addition, the retention of sealants between the maxilla and mandible was not significantly different (P>0.05). Friedman test revealed no significant difference in any of the five parameters at different time points in any sealant group (P>0.05). Conclusions: Embrace hydrophilic and Helioseal-F hydrophobic sealants have the same one-year clinical success rate.Key words: Pit and Fissure Sealants; Embrace WetBond; Helioseal; Dentition, Permanent
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • Treatment of a Four-Rooted Maxillary Second Molar Detected with Cone-Beam
           Computed Tomography

    • Authors: Nahid Mohammadzade Akhlaghi, Mahta Fazlyab
      Pages: 100 - 104
      Abstract: The significance of clinician’s knowledge about root canal anatomy and its possible variations cannot be overlooked. In some cases, taking advantage of complementary imaging techniques can help achieve a perfect flawless endodontic treatment. This article reports endodontic management of a second maxillary molar that had an uncommon anatomy of the chamber floor. After obtaining a cone-beam computed tomography (CBCT) image, the presence of a second palatal root was confirmed. All four roots were treated and patient’s symptoms were resolved.Keywords: Cone-Beam Computed Tomography; Root Canal Therapy; Tooth Root
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • Management of Limited Interocclusal Distance with the Aid of a Modified
           Surgical Guide: A Clinical Report

    • Authors: Farideh Geramipanah, Leyla Sadighpour, Amirreza Hendi
      Pages: 105 - 108
      Abstract: In completely edentulous patients, limited interarch distance can compromise conventional prosthetic fabrication. Bone reduction through various surgical procedures has been recommended to restore an acceptable interarch distance. In such circumstances, a surgical guide built on a mounted cast can be used to minimize and control the amount of bone reduction performed. In the present report, an innovative method of fabrication of surgical guide has been described.Keywords: Osteotomy; Stents; Dental Articulators; Denture, Complete
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
  • Oral Lichen Planus in a Pediatric Patient: A Novel Therapeutic Approach

    • Authors: Gaurav Sharma, Divesh Sardana, Puneeta Vohra, Shweta Rehani, Archna Nagpal
      Pages: 109 - 114
      Abstract: Lichen planus is a mucocutaneous disease, predominantly affecting the middle-aged individuals and may be associated with a plethora of signs and symptoms related to the skin, scalp, nails and mucous membranes. The definitive etiology of lichen planus is not yet known and no therapeutic modality has yet been universally accepted. Lichen planus in pediatric patients is a rare phenomenon and its presence in the oral mucosa is even rarer. The aim of this article is to present a rare case of a symptomatic oral lichen planus (OLP) occurring in a 12-year old child that was managed successfully with a novel sequential modality of topical retinoids followed by aloe vera gel application.Keywords: Lichen Planus, Oral; Aloe Vera Gel; Retinoids; Therapeutics
      PubDate: 2017-08-06
      Issue No: Vol. 14, No. 2 (2017)
       
 
 
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