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DENTISTRY (293 journals)                  1 2 | Last

Showing 1 - 200 of 289 Journals sorted alphabetically
Ação Odonto     Open Access   (Followers: 2)
Acta Odontologica Scandinavica     Hybrid Journal   (Followers: 7)
Acta Odontologica Turcica     Open Access  
Acta Stomatologica Marisiensis Journal     Open Access   (Followers: 1)
Actas Odontológicas     Open Access   (Followers: 1)
Advances in Dental Research     Hybrid Journal   (Followers: 11)
African Journal of Dentistry & Implantology     Open Access  
Aktuel Nordisk Odontologi     Full-text available via subscription   (Followers: 1)
Al-Rafidain Dental Journal     Open Access   (Followers: 2)
Angle Orthodontist     Open Access   (Followers: 8)
Annals and Essences of Dentistry     Open Access   (Followers: 2)
Annals of Periodontology     Full-text available via subscription   (Followers: 5)
Annals of the Royal Australasian College of Dental Surgeons     Full-text available via subscription   (Followers: 5)
APOS Trends in Orthodontics     Open Access   (Followers: 2)
Atatürk Üniversitesi Diş Hekimliği Fakültesi Dergisi     Open Access  
Australian Dental Journal     Hybrid Journal   (Followers: 10)
Australian Endodontic Journal     Hybrid Journal   (Followers: 4)
Avances en Odontoestomatologia     Open Access   (Followers: 2)
Avances en Periodoncia e Implantología Oral     Open Access   (Followers: 1)
Avicenna Journal of Dental Research     Open Access   (Followers: 5)
Balkan Journal of Dental Medicine     Open Access  
Bangladesh Journal of Dental Research & Education     Open Access   (Followers: 3)
Bangladesh Journal of Orthodontics and Dentofacial Orthopedics     Open Access   (Followers: 5)
BDJ Open     Open Access   (Followers: 3)
Biomaterial Investigations in Dentistry     Open Access  
Brazilian Dental Journal     Open Access   (Followers: 4)
Brazilian Dental Science     Open Access   (Followers: 2)
Brazilian Journal of Oral Sciences     Open Access   (Followers: 2)
Brazilian Oral Research     Open Access  
British Dental Journal     Hybrid Journal   (Followers: 20)
Bulletin du Groupement International pour la Recherche Scientifique en Stomatologie et Odontologie     Open Access  
Caries Research     Full-text available via subscription   (Followers: 3)
Case Reports in Dentistry     Open Access   (Followers: 8)
Caspian Journal of Dental Sciences     Open Access   (Followers: 3)
CES Odontología     Open Access   (Followers: 1)
Chiang Mai Dental Journal     Open Access  
Ciencia Odontológica     Open Access   (Followers: 1)
City Dental College Journal     Open Access   (Followers: 4)
Cleft Palate-Craniofacial Journal     Hybrid Journal   (Followers: 8)
Clinical Advances in Periodontics     Full-text available via subscription   (Followers: 5)
Clinical and Experimental Dental Research     Open Access   (Followers: 6)
Clinical and Laboratorial Research in Dentistry     Open Access   (Followers: 2)
Clinical Dentistry     Open Access   (Followers: 5)
Clinical Dentistry Reviewed     Hybrid Journal  
Clinical Implant Dentistry and Related Research     Hybrid Journal   (Followers: 10)
Clinical Oral Implants Research     Hybrid Journal   (Followers: 8)
Clinical Oral Investigations     Hybrid Journal   (Followers: 4)
Clinical, Cosmetic and Investigational Dentistry     Open Access   (Followers: 5)
Community Dentistry and Oral Epidemiology     Hybrid Journal   (Followers: 5)
Contemporary Clinical Dentistry     Open Access   (Followers: 5)
Craniomaxillofacial Trauma & Reconstruction Open     Open Access  
Critical Reviews in Oral Biology Medicine     Hybrid Journal   (Followers: 2)
Cumhuriyet Dental Journal     Open Access   (Followers: 1)
Current Dentistry     Hybrid Journal   (Followers: 1)
Current Oral Health Reports     Hybrid Journal   (Followers: 4)
Current Research in Dentistry     Open Access   (Followers: 10)
Dental Abstracts     Full-text available via subscription   (Followers: 8)
Dental Cadmos     Partially Free   (Followers: 3)
Dental Clinics of North America     Full-text available via subscription   (Followers: 6)
Dental Forum     Open Access   (Followers: 1)
Dental Hypotheses     Open Access   (Followers: 5)
Dental Journal (Majalah Kedokteran Gigi)     Open Access   (Followers: 2)
Dental Journal of Advance Studies     Open Access   (Followers: 2)
Dental Materials     Full-text available via subscription   (Followers: 16)
Dental Press Journal of Orthodontics     Open Access   (Followers: 5)
Dental Research Journal     Open Access   (Followers: 14)
Dental Traumatology     Hybrid Journal   (Followers: 7)
Dentistry     Open Access   (Followers: 3)
Dentistry 3000     Open Access   (Followers: 2)
Dentistry and Medical Research     Open Access   (Followers: 1)
Dentistry Journal     Open Access   (Followers: 6)
Dentomaxillofacial Radiology     Hybrid Journal   (Followers: 4)
Der Freie Zahnarzt     Hybrid Journal  
der junge zahnarzt     Hybrid Journal  
Die Quintessenz     Full-text available via subscription  
Disease-a-Month     Full-text available via subscription   (Followers: 4)
Droit et Médecine Bucco-Dentaire     Full-text available via subscription   (Followers: 1)
E-Prodenta Journal of Dentistry     Open Access  
ENDO     Full-text available via subscription   (Followers: 8)
Endodontic Topics     Hybrid Journal   (Followers: 3)
Endodontie     Full-text available via subscription  
Endodontology     Open Access  
European Archives of Paediatric Dentistry     Hybrid Journal   (Followers: 4)
European Journal of Dental Education     Hybrid Journal   (Followers: 3)
European Journal of Dentistry     Open Access   (Followers: 5)
European Journal of Dentistry and Medicine     Open Access   (Followers: 3)
European Journal of Esthetic Dentistry     Full-text available via subscription   (Followers: 6)
European Journal of General Dentistry     Open Access   (Followers: 3)
European Journal of Oral Implantology     Full-text available via subscription   (Followers: 8)
European Journal of Oral Sciences     Hybrid Journal   (Followers: 2)
European Journal of Orthodontics     Hybrid Journal   (Followers: 6)
European Journal of Research in Dentistry     Open Access  
Evidence-Based Dentistry     Full-text available via subscription   (Followers: 7)
Evidence-Based Endodontics     Open Access  
Faculty Dental Journal     Full-text available via subscription   (Followers: 2)
Future Dental Journal     Open Access   (Followers: 3)
Giornale Italiano di Endodonzia     Open Access  
Implant Dentistry     Hybrid Journal   (Followers: 7)
Implantologie     Full-text available via subscription   (Followers: 3)
Indian Journal of Dental Research     Open Access   (Followers: 5)
Indian Journal of Dental Sciences     Open Access  
Indian Journal of Dentistry     Open Access   (Followers: 2)
Indian Journal of Multidisciplinary Dentistry     Open Access   (Followers: 1)
Indian Journal of Oral Health and Research     Open Access  
Informationen aus Orthodontie & Kieferorthopädie     Hybrid Journal  
Insisiva Dental Journal     Open Access  
International Dental Journal     Hybrid Journal   (Followers: 3)
International Endodontic Journal     Hybrid Journal   (Followers: 4)
International Journal of Community Dentistry     Open Access  
International Journal of Computerized Dentistry     Full-text available via subscription   (Followers: 3)
International Journal of Contemporary Dental and Medical Reviews     Open Access   (Followers: 5)
International Journal of Dental Hygiene     Hybrid Journal   (Followers: 3)
International Journal of Dental Materials     Open Access   (Followers: 5)
International Journal of Dental Research     Open Access   (Followers: 6)
International Journal of Dental Science and Research     Full-text available via subscription   (Followers: 2)
International Journal of Dental Sciences and Research     Open Access   (Followers: 1)
International Journal of Dentistry     Open Access   (Followers: 8)
International Journal of Forensic Odontology     Open Access   (Followers: 1)
International Journal of Growth Factors and Stem Cells in Dentistry     Open Access  
International Journal of Implant Dentistry     Open Access   (Followers: 3)
International Journal of Medical and Dental Sciences     Full-text available via subscription  
International Journal of Odontostomatology     Open Access   (Followers: 1)
International Journal of Oral & Maxillofacial Implants     Full-text available via subscription   (Followers: 11)
International Journal of Oral Health Sciences     Open Access   (Followers: 4)
International Journal of Oral Science     Open Access   (Followers: 3)
International Journal of Orofacial Biology     Open Access   (Followers: 1)
International Journal of Orofacial Research     Open Access   (Followers: 2)
International Journal of Orthodontic Rehabilitation     Open Access   (Followers: 2)
International Journal of Paediatric Dentistry     Hybrid Journal   (Followers: 5)
International Journal of Pedodontic Rehabilitation     Open Access  
International Journal of Periodontics & Restorative Dentistry     Full-text available via subscription   (Followers: 9)
International Journal of Prosthodontics     Full-text available via subscription   (Followers: 7)
International Journal of Stomatological Research     Open Access  
International Orthodontics     Full-text available via subscription   (Followers: 3)
Japanese Dental Science Review     Open Access   (Followers: 1)
JDR Clinical & Translational Research     Hybrid Journal   (Followers: 1)
Journal of Academy of Dental Education     Hybrid Journal   (Followers: 4)
Journal of Adhesive Dentistry     Full-text available via subscription   (Followers: 4)
Journal of Advanced Oral Research     Hybrid Journal   (Followers: 4)
Journal of Applied Oral Science     Open Access  
Journal of Baghdad College of Dentistry     Open Access  
Journal of Clinical Periodontology     Hybrid Journal   (Followers: 8)
Journal of Conservative Dentistry     Open Access   (Followers: 4)
Journal of Craniomandibular Function     Full-text available via subscription  
Journal of Dental and Allied Sciences     Open Access   (Followers: 2)
Journal of Dental Biomaterials     Open Access   (Followers: 3)
Journal of Dental Education     Full-text available via subscription   (Followers: 2)
Journal of Dental Implants     Open Access   (Followers: 9)
Journal of Dental Lasers     Open Access   (Followers: 2)
Journal of Dental Medicine     Open Access   (Followers: 2)
Journal of Dental Problems and Solutions     Open Access   (Followers: 1)
Journal of Dental Research     Hybrid Journal   (Followers: 8)
Journal of Dental Research and Review     Open Access   (Followers: 1)
Journal of Dental Sciences     Open Access   (Followers: 1)
Journal of Dentistry     Hybrid Journal   (Followers: 8)
Journal of Dentistry : X     Open Access  
Journal of Dentistry and Oral Hygiene     Open Access   (Followers: 1)
Journal of Dentistry for Children     Full-text available via subscription   (Followers: 3)
Journal of Dentistry Indonesia     Open Access  
Journal of Dentistry of Tehran University of Medical Sciences     Open Access  
Journal of Dentofacial Anomalies and Orthodontics     Full-text available via subscription   (Followers: 2)
Journal of Dentomaxillofacial Science     Open Access   (Followers: 1)
Journal of Education and Ethics in Dentistry     Open Access   (Followers: 6)
Journal of Endodontics     Full-text available via subscription   (Followers: 7)
Journal of Esthetic and Restorative Dentistry     Hybrid Journal   (Followers: 8)
Journal of Evidence Based Dental Practice     Full-text available via subscription   (Followers: 3)
Journal of Forensic Dental Sciences     Open Access   (Followers: 5)
Journal of Indian Academy of Dental Specialist Researchers     Open Access  
Journal of Indian Academy of Oral Medicine and Radiology     Open Access   (Followers: 3)
Journal of Indian Association of Public Health Dentistry     Open Access   (Followers: 2)
Journal of Indian Orthodontic Society     Open Access   (Followers: 2)
Journal of Indian Prosthodontic Society     Open Access   (Followers: 3)
Journal of Indian Society of Periodontology     Open Access  
Journal of Interdisciplinary Dentistry     Open Access   (Followers: 5)
Journal Of International Dental And Medical Research     Open Access   (Followers: 1)
Journal of International Oral Health     Open Access   (Followers: 1)
Journal of International Society of Preventive and Community Dentistry     Open Access   (Followers: 3)
Journal of Investigative and Clinical Dentistry     Hybrid Journal   (Followers: 2)
Journal of Isfahan Dental School     Open Access   (Followers: 2)
Journal of Nepalese Prosthodontic Society (JNPS)     Open Access  
Journal of Nepalese Society of Periodontology and Oral Implantology     Open Access  
Journal of Oral & Facial Pain and Headache     Full-text available via subscription   (Followers: 3)
Journal of Oral and Maxillofacial Radiology     Open Access   (Followers: 1)
Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology     Full-text available via subscription   (Followers: 8)
Journal of Oral Biology     Open Access   (Followers: 1)
Journal of Oral Biosciences     Hybrid Journal   (Followers: 5)
Journal of Oral Implantology     Hybrid Journal   (Followers: 4)
Journal of Oral Microbiology     Open Access   (Followers: 3)
Journal of Oral Research     Open Access   (Followers: 3)
Journal of Oral Research and Review     Open Access  
Journal of Orthodontic Research     Open Access   (Followers: 4)
Journal of Orthodontic Science     Open Access   (Followers: 3)
Journal of Orthodontics     Hybrid Journal   (Followers: 5)
Journal of Pediatric Dentistry     Open Access   (Followers: 5)
Journal of Periodontology     Full-text available via subscription   (Followers: 7)
Journal of Pierre Fauchard Academy (India Section)     Full-text available via subscription   (Followers: 2)
Journal of Prosthetic Dentistry     Hybrid Journal   (Followers: 8)
Journal of Public Health Dentistry     Hybrid Journal   (Followers: 2)
Journal of Research in Dentistry     Open Access   (Followers: 2)
Journal of Restorative Dentistry     Open Access   (Followers: 3)

        1 2 | Last

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Caspian Journal of Dental Sciences
Number of Followers: 3  

  This is an Open Access Journal Open Access journal
ISSN (Print) 2251-9890 - ISSN (Online) 2322-2395
Published by Babol University of Medical Sciences Homepage  [1 journal]
  • The pattern of use of toothpaste among family members in Tehran Iran

    • Authors: Reza Yazdani
      Abstract: Introduction: Oral health can influence general health and then the quality of life. Regular toothbrushing with toothpaste plays a fundamental role in oral hygiene. The aim of this study was to assess the pattern of utilization of toothpaste among Iranian population.
      Materials & Methods: This cross-sectional study evaluated the family members of patients (n=715) presenting to dental clinics of School of Dentistry of Tehran University of Medical Sciences, in 2017. A researcher-made questionnaire was used to collect information regarding the pattern of utilization of toothpaste by the subjects. Data were analyzed using Chi-square test via SPSS 25.
      Results: Of all, 81% participants reported that they personally use toothpaste when toothbrushing and 75.9% stated that all the family members used toothpaste when brushing their teeth. Moreover, 57.2% reported that all the family members shared the same toothpaste; 86.6% reported that they started brushing the teeth of their children at the age of 3 years. When asked about the factors considered when for purchasing - toothpaste, the most important factors were the manufacturing country (42.5%), date of production (38.7%), having standard and authenticity labels (29.5%), the price (29.5%).
      Conclusion: According to the results, Iranian families have inadequate knowledge about the correct pattern of use of toothpastes.
       
       
  • Effect of three veneering techniques on fracture resistance and marginal
           adaptation of zirconia-based crowns

    • Authors: Ghazaleh Ahmadizenouz
      Abstract: Introduction: The aim of this study was to evaluate the fracture resistance (FR) of zirconia-based crowns veneered with different methods and to assess marginal gap before and after veneering.
      Materials & Methods: Thirty zirconia copings fabricated by Computer Aided Design/Computer Aided Manufacturing (CAD/CAM) were divided into three groups. In the porcelain layering (PL) group, the copings were manually veneered with VM9 feldspathic porcelain. In the indirect composite (IC) group, the Gradia indirect composite was veneered on zirconia copings, and for the CAD-on (CO) group, the CAD/CAM-fabricated Vita Mark II veneer was cemented onto the copings. For each sample, the marginal gap values at four points (buccal, lingual, mesial and distal) were measured using stereomicroscope and computer software (Motic Images plus 2.0 ML) before and after veneering process. All crowns were cemented on their dies with resin cement and then were loaded by a universal testing machine for failure. Data were analyzed using one-way ANOVA and post-hoc Tukey tests at significant level of 0.05.
      Results: Mean FR was statistically higher in PL group (3005 N) than IC (2026 N) and CO (1605 N) groups (P=0.000). Before and after veneering, mean marginal gap was 43.42μm and 48.47μm for PL group, 44.69μm and 51.06μm for IC group as well as 53.03μm and 56.08μm for CO group, respectively. Marginal gap had no significant difference in study groups before and after veneering (P=0.56 and 0.18, respectively). The lowest change in marginal gap was observed in CO group.
      Conclusion: The PL technique might increase the failure resistance of Zirconia-based crowns compared to IC and CO techniques. The marginal gap rate following veneering in all three techniques was within acceptable clinical limits.
       
  • CD-1a immunoexpression in oral lichen planus and oral lichenoid reaction

    • Authors: Hamid Abbaszadeh
      Abstract: Introduction: Oral lichen planus (OLP) is an immunologically mediated mucocutaneous diseases. Langerhans cells (LCs) are antigen presenting cells resident within oral mucosa which, together with intraepithelial lymphocytes, play a role in mucosal defense. The aim of present study was to determine the immunohistochemical expression of LC in oral lichenoid reaction  (OLR) and OLP compared with normal oral mucosa (NOM).
      Materials & Methods: In this cross-sectional study, 61 oral mucosal specimens diagnosed histopathologically as OLP (n=31) and OLR (n=30) and 11 NOM were used to study the immunohistochemical expression of CD1a. The CD1a positive LCs in three regions (basal, suprabasal, and connective tissue) were counted in six randomly selected fields. Data were analyzed using the SPSS 24, T-test, ANOVA, LSD, Games-Howell tests. P
       
  • Effect of soldering on bond strength of porcelain to metal in
           porcelain-fused-to-metal castings

    • Authors: Meysam Mahabadi
      Abstract: Introduction: Soldering has several applications in prosthodontic treatments; however, the effect of soldering on porcelain to metal bond strength has not been adequately studied. This study was designed to assess the bond strength of porcelain to metal, and the mode of failure at the soldered and non-soldered areas of cubic specimens.
      Materials & Methods: In this in vitro, experimental study, 40 porcelain-metal specimens were fabricated under similar conditions and divided into two groups (n=20). In the test group, a hole was created at the center of the frame and was then soldered and veneered with porcelain. The second group was considered as a control group. The bond strength was measured at the center of the specimen using the 3-point bending test in a universal testing machine with a crosshead speed of 0.5 mm/min. The mean force required for debonding was determined. Photographs of the specimens were digitalized by a scanner and magnified on a computer screen with x10.5 magnification. Next, each image was divided into 100 squares (1×1 mm). The mode of failure was determined for each specimen. The two groups were compared using independent t-test (p-value˂ 0.05).
      Results: The mean porcelain-metal bond strength was 36.6±7.3 N for the soldered and 37.4±4.6 N for the non-soldered group with no significant difference between them (P>0.05). The mode of failure was cohesive in all specimens in both groups with no significant difference between them (P>0.05).
      Conclusion: Within the limitations of this study, the soldered and non-soldered specimens showed no significant difference regarding the porcelain-metal bond strength.
       
  • A comparison of image artifacts with gutta-percha and different sealers on
           root filled teeth using cone beam computed tomography: An in vitro study

    • Authors: Sina Haghanifar
      Abstract: Introduction: Different materials cause artifacts in cone-beam computed tomography (CBCT) images, which, in turn, reduce the quality of images. The aim of this study was to investigate the abundance of artifacts induced by different root canal therapy sealers with two different CBCT resolutions.
      Materials & Methods: Roots of four maxillary central phantom teeth were prepared using rotary files in three steps. In the first step, the first tooth was scanned first without gutta-percha and then with gutta-percha No. 25. Gutta-percha No. 25 with resin, the zinc oxide-eugenol (ZOE)-based sealer and the ceramic-based sealer were placed in the teeth No. 2, 3 and 4, respectively. The second step was performed similar to the first step, except that gutta-percha No. 35 was used in the tooth No. 1 with resin- and ZOE-based sealers in the teeth No. 2 and 3. due to the lack of access to the ceramic-based sealer that was not used to continue the study . In the third step, canal obturation was performed in the teeth No. 2 and 3 with resin and ZOE-based sealers. At each step, three CBCT scans were obtained in high and standard resolution conditions. Contrast-to-noise ratio was obtained in three root plans, and the data were analyzed.
      Results: Gutta-percha alone produced more artifacts than gutta-percha with sealers. Moreover, ZOE-based sealers induced more artifacts than other sealers. There was no significant difference between the three steps. Similarly, at different resolutions, there was no significant difference between gutta-percha and sealer artifacts. The ZOE-based sealers had more artifacts at 1/3 apical whereas resin sealers had more artifacts at 1/3 coronal.
      Conclusion: The higher artifact of gutta-percha in comparison with gutta-percha and sealer and the artifact decrease in the combination of gutta-percha and resin-based sealer than ZOE-based sealer has led us to recommend the use of resin-based sealer while root canal therapy in order to better evaluation of the CBCT Images of root canal.
       
  • Comparison of apical microleakage of mineral trioxide aggregate,
           calcium-enriched mixture cement and biodentine as root end filling
           materials

    • Authors: Ali Soleymani
      Abstract: Introduction: The aim of this in vitro study was to assess the apical microleakage of mineral trioxide aggregate (MTA), calcium enriched mixture (CEM) cement, and biodentine.
      Materials & Methods: The study was performed on 76 single-canal human teeth. Root canals were prepared by ProTaper rotary system, obturated with gutta-percha. Thereafter, the apical section of the teeth was cut from 3 mm above the apex, and 3 mm of gutta-percha was removed by an ultrasonic device from the apical part of the root canals. Then, 60 teeth were randomly assigned to 3 groups and filled with MTA, CEM cement, and biodentine. Control groups were also prepared. All surfaces of the samples were covered with two layers of nail polish, except for the surfaces near the apical filling. In each group, half of the samples were immersed in indian ink for 3 days and the other half for 7 days. After clearing, the samples were examined using stereo microscope with 20x magnification and dye penetration was evaluated. Data analysis was performed using Repeated measures and One-way ANOVA and p
       
  • Comparison of the push-out bond strength between root mineral trioxide
           aggregate( MTA) and calcium-enriched mixture (CEM) cement

    • Authors: Akam Saeidi
      Abstract: Introduction: Root mineral trioxide aggregate (MTA) is a type of MTA that has been introduced in the Iranian market. There have been few studies on this substance. This study compared the push-out bond strength of Root MTA and CEM cement, which were both Iranian products.
      Materials & Methods: This in vitro study was performed on 20 extracted maxillary incisors. Samples were divided in  two groups. The canals of the first group were filled with Root MTA and the second group by CEM cement. In order to investigate the push-out bond strength, the device applied a force in the direction parallel to the longitudinal axis of the sample so that the desired materials would fail. Each sample was classified into one of three types of failureincluding adhesive (failure in the material and dentin interface), cohesive (failure in the material itself) or a combination of both.
      Results: There was no significant difference between the mean pressure on teeth for the two groups (P>0.05). There was no significant difference between the frequencies of different types of failure between the two groups (P>0.05). Cohesive failure in the CEM group was twice as high as in the MTA group (P>0.05).
      Conclusion:There was no any significant difference between the push-out bond strength of CEM cement and Root MTA cement. These findings demonstrated that Root MTA material showed a satisfactory result in the bond strength test compared to CEM material, and could be used as an alternative to CEM cement.
       
  • Frequency of middle mesial canal and radix entomolaris in mandibular first
           molars by cone beam computed tomography in a selected Iranian population

    • Authors: Ali Soleymani
      Abstract: Introduction: Although there are many studies about the internal anatomy of mandibular molars, there is still controversy over the frequency of middle mesial canals and isthmuses in the mesial root of mandibular molars and distolingual third root (Radix entomolaris) that  it can be seen in any population, but it is more frequent in Asians and makes endodontic treatment difficult. Because of limited studies on the middle mesial canal, isthmus in north of Iran; therefore, the aim of this study was to investigate the frequency of these variations in the north of country.
      Materials & Methods:  In this retrospective cross-sectional study, The cone beam computed tomography (CBCT) images of 200 mandibular first molar teeth without any root canal treatment and completely erupted and developed were evaluated. Samples with open apex, internal root resorption, calcification, crown and extensive restoration were excluded. The patients’ gender, age, tooth location (left and right), count of canals in the mesial root, presence or absence of isthmus in mesial root, middle mesial canal and isthmus level in the mesial root and distolingual root (Radix entomolaris) were studied in three groups based on age; 40.
      Results: From 200 samples, 18 teeth (9%) had middle mesial canal, 38 teeth (19%) had isthmus in mesial root and 6 teeth (3%) had distolingual root (Radix entomolaris).
      Conclusion: due to the high frequency of isthmuses, middle mesial canals and Radix entomolaris in the population, which cannot be ignored, missing and treating these spaces could be one of the main reasons for failure in root canal treatment. Therefore, it is advised to put more effort into detecting and completely clean and obturate these spaces in surgical and non-surgical endodontic treatments.
       
  • Comparison of shear bond strength of a composite resin to resin modified
           and conventional glass ionomer using different bonding systems

    • Authors: Effat Khodadadi
      Abstract: Introduction: Glass ionomers are often used as a base under composite restorations in deep cavities by sandwich technique. The aim of this study was to compare the shear bond strength of composite to resin modified and conventional glass ionomer using total etch , self-etch and universal bonding systems.
      Materials & Methods: Ninety glass-ionomer samples were prepared for this research: Fuji II (F II), IonoStar Plus (IS) and Fuji II LC (F II LC).Then the specimens were divided into 9 groups (n=10). The surface of the specimens were prepared with three types of bonding: Adper single bond2 (SB), Clearfil SE bond (SE) and Single bond Universal (SU).Then Z250 composite resin was applied on the glass ionomers. The specimens were incubated in distilled water for 24 hours at 37 ° C and then were tested for shear bond strength. The type of failure was determined by a ×40 stereomicroscope and the results of the study were analyzed by nonparametric statistical analysis and Kruskal Wallis test. P≤0.05 was considered significant.
      Results: The highest shear bond strength was observed in the Fuji II LC + Single bond2 group. There was a statistically significant difference in the shear bond strength of the composite to the two glass ionomers F II and F II LC using SB and SU bonding systems (P=0.033 and P=0.040, respectively).There was no significant difference between the groups regarding the type of failure.
      Conclusion: Unlike the Fuji II LC and IonoStar Plus glass ionomers, the shear bond strength of the composite to the Fuji II conventional glass ionomer is affected by the type of bonding system. Total-etch and self-etch bonding systems can be used effectively in sandwich technique. Using a resin modified glass ionomer with total etch bonding can improve the shear bond strength of the composite to the glass ionomer.
       
 
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