@article{ author = {ZakerJafari, HamidReza and Dadashi, Saloomeh and Aghajani, reihaneh and Pourhabibi, Zahr}, title = {Knowledge and Practice of Dentists Regarding Disinfection of Impressions Sent to Laboratory}, abstract ={Introdouction: Infection control procedures are essential fordentists. Oral and dental impressions can act as carriers of contaminants that can increase the risk of infections while being transferred from the laboratory to the dental office. Therefore, the aim of this study was to evaluate the knowledge and practice of dentists regarding disinfection of impressions sent to the laboratory. Materials and methods: In this sectional descriptive study, 166 dentists in Rasht were randomly surveyed using a questionnaire that included routine demographic questions, including 10 on knowledge and 15 on practice. Each correct answer was scored +1 in the two-choice questions, and each choice was graded as weak, moderate, or good in the multiple-choice questions. Chi-square and Wilcoxon–Mann–Whitney tests were performed using SPSS 19.0 software to analyze the data. Results: The total mean and standard deviation values for dentists’ knowledge were found to be 2.11 ± 0.562, and 18 (10.8%), 112 (67.5%), and 36 (21.7%) of the 166 dentists demonstrated good, moderate, and weak knowledge, respectively. The total mean and standard deviation values for dentists’ practice were 1.67 ± 0.663, and 72 (43.4%), 76 (45.8%), and 18 (10.8%) dentists demonstrated good, moderate, and weak practice, respectively. Conclusion:Most dentists demonstrated moderate knowledge and practice of disinfection of dental impressions, and in many cases, the knowledge was not commensurate with the practice. Thus, despite the moderate and upward knowledge, the practice was weak. Furthermore, the dentists’ knowledge and practice were not sufficient to ensure disinfection of impressions. Better training and careful monitoringis needed in this regard.}, Keywords = {Dentists,Impression Materials ,Infection Control , Knowledge, Practice}, volume = {3}, Number = {3}, pages = {1-7}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.18869/acadpub.3dj.3.3.1}, url = {http://3dj.gums.ac.ir/article-1-124-en.html}, eprint = {http://3dj.gums.ac.ir/article-1-124-en.pdf}, journal = {Journal of Dentomaxillofacial}, issn = {}, eissn = {}, year = {2014} } @article{ author = {Movahhedian, Najmeh and Khojastepour, Leila and Mortazavi, Fahimeh and SadeghBirjandi, Mohamm}, title = {Interproximal Caries Detection Ability of Dental Practitioners Using Direct Digital System and Conventional Films}, abstract ={Introdouction:The study aimed to compare the accuracy of proximal caries detection by dental practitioners using two different systems, direct digital system and conventional films, under routine environmental conditions. Materials and methods: Eleven extracted human posterior teeth were mounted on wax frames and were exposed using the direct digital system and conventional films. Seventy-four dental practitioners evaluated these images for proximal caries. No environmental conditions were dictated. The dental practitioners’ evaluations were compared with histopathological sections that were used as the gold standard. Results:There were no statistically significant differences in the dental practitioners’ ability to detect caries using the direct digital and conventional systems (P=0.548).No significant differences were found between groups based on the level of the dental practitioners’ work experience (P=0.167). Conclusion:Dental practitioners work well with both direct digital and conventional systems in the diagnosis of proximal caries, although the routine environmental condition is not the ideal one. Further, this ability is so basic that it is not influenced by the level of the dental practitioner’s experience.Therefore, we recommend that digital systems be considered for use in dental offices.}, Keywords = {Dental Caries ,Digital Dental Radiography ,Dentists}, volume = {3}, Number = {3}, pages = {8-13}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.18869/acadpub.3dj.3.3.8}, url = {http://3dj.gums.ac.ir/article-1-125-en.html}, eprint = {http://3dj.gums.ac.ir/article-1-125-en.pdf}, journal = {Journal of Dentomaxillofacial}, issn = {}, eissn = {}, year = {2014} } @article{ author = {DaliliKajan, Zahra and Taramsari, Mehran and Nemati, Somayeh and Barandeh, Mehrnaz}, title = {Ghost Image Mapping of Palatal Bone of Maxilla and Nasal Cavity in Panoramic View Using Cranex D Digital Machine}, abstract ={Introdouction: The mapping of ghost images of the maxilla and the nasal cavity, which are complex structures, is very important. The position of objects that create a ghost image can differ when using various devices. The purpose of this investigation was to study the mapping of ghost images of the maxilla and the nasal cavity using a Cranex D digital panoramic machine. Materials and methods: The mapping of ghost images of the maxilla and the nasal cavity, which are complex structures, is very important. The position of objects that create a ghost image can differ when using various devices. The purpose of this investigation was to study the mapping of ghost images of the maxilla and the nasal cavity using a Cranex D digital panoramic machine. Results: When the lead ball was located in the posterior third of the septum in the anterior-posterior direction and in the middle third above the base of the septum, a ghost image was detected in panoramic view. If the ball was placed in the posterior nasal spine, the image of the object appeared extremely elongated in a horizontal direction. The same was seen when the ball was located in the posterior third of the septum in the anterior- posterior direction and near the base of the septum. Conclusion: This in vitro study examining ghost image mapping of the maxilla and the nasal cavity, using a Cranex D machine, revealed that the ghost envelope was limited. Digital panoramic device manufacturers have attempted to reduce ghost images, and this has now been achieved with this particular digital machine.}, Keywords = {Maxilla ,Nasal Cavity ,Radiography ,Panoramic}, volume = {3}, Number = {3}, pages = {14-20}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.18869/acadpub.3dj.3.3.14}, url = {http://3dj.gums.ac.ir/article-1-126-en.html}, eprint = {http://3dj.gums.ac.ir/article-1-126-en.pdf}, journal = {Journal of Dentomaxillofacial}, issn = {}, eissn = {}, year = {2014} } @article{ author = {Hajihassani, Neda and Tofangchiha, Maryam and HosseinNahtaj, Mojtab}, title = {Comparison of Accuracy and Observer Agreement in the Detection of Simulated External Root Resorption Using Conventional Digital Radiography and Digitally Filtered Radiography}, abstract ={Introduction: External root resorption is a clinical problem that often cannot be detected clinically. Thus, radiography plays a crucial role in its diagnosis. However, optimal radiographic quality with minimal radiation exposure {2.1 [EN] Verify English word/phrase choice} is an important factor in selecting the appropriate radiographic technique. The aim of this study was the comparison of accuracy and observer agreement in the detection of simulated external root resorption using conventional digital radiography and digitally filtered radiography. Materials and methods: The study was performed using 100 single rooted teeth in a dry mandibular jaw. The teeth were divided into 5 groups as follows: (1) without resorption, (2) resorption with 0.25 mm depth on buccal surface, (3) resorption with 0.5 mm depth on buccal surface, (4)resorption with 0.25 mm depth on proximal surfaces, and (5) resorption with 0.5 mm depth on proximal surfaces. Digital radiographic images, both conventional and digitally filtered using 3 filters (diagonal, horizontal, and vertical), were obtained. The 2 groups of images were then evaluated by 4 observers in 2 stages, with an interval of 1 week. Thereafter, sensitivity, accuracy, specificity, and Kappa coefficients were calculated to assess observer agreement.  Results: For digitally filtered radiography with diagonal, horizontal, and vertical filters, the accuracy values were 86.5%, 87.2%, and 89.2% sensitivity values were 93.1%, 92.7%, and 94.3% and specificity values were 82.5%, 87.5%, and 93.7%, respectively. The accuracy, sensitivity, and specificity values for conventional digital radiography were 86.5%, 91.5%, and 82.5%, respectively. Conclusion: Manipulation of images in digital radiographic systems may not always facilitate diagnosis.}, Keywords = {Radiography ,Dental ,Digital ,Root Resorption ,Diagnosis}, volume = {3}, Number = {3}, pages = {21-27}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.18869/acadpub.3dj.3.3.21}, url = {http://3dj.gums.ac.ir/article-1-127-en.html}, eprint = {http://3dj.gums.ac.ir/article-1-127-en.pdf}, journal = {Journal of Dentomaxillofacial}, issn = {}, eissn = {}, year = {2014} } @article{ author = {Mirbeigi, Sanam and Khojastepour, Leila and Ezoddini, Fatameh}, title = {Correlation between Mandibular Radiomorphometric Parameters and Gonial Angle size in Iranian Adults}, abstract ={Introdouction: The purpose of the present study was to determine the possible relationship between gonial angle size and three mandibular morphometric parameters, namely, panoramic mandibular index (PMI), mandibular cortical width (MCW), and antegonial notch depth (AD), in digital panoramic radiographs. Materials and methods: PMI, MCW, and AD were calculated in digital panoramic radiographs of 370 dentulous adult subjects with a mean age of 44.2 years and a mean number of remaining teeth of 23.49 ± 7.71. The differences between the mean values of measured parameters were compared between males and females, among various age groups, and between subjects with low and high gonial angles (gonial angle of ≤120 and ≥125, respectively) . The correlation between gonial angle size, PMI, MCW, and AD was also evaluated. T-test, ANOVA, and Pearson’s correlation test were used for statistical analysis. A P<0.05 was considered as statistically significant. Results: PMI, AD, and MCW(Mandibular Cartical Width) were significantly higher in subjects with low gonial angle (LGA) than those with high gonial angle (HGA). PMI, AD, and MCW were also significantly higher in males than those in females. Significantly negative correlations between the gonial angle and PMI, AD, and MCW were also observed. Conclusion: The mandibular radiomorphometric parameters of PMI, AD, and ACW are related to sex and gonial angle size.}, Keywords = {Mandible ,Radiography ,Dental ,Digital ,Adult}, volume = {3}, Number = {3}, pages = {28-34}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.18869/acadpub.3dj.3.3.28}, url = {http://3dj.gums.ac.ir/article-1-128-en.html}, eprint = {http://3dj.gums.ac.ir/article-1-128-en.pdf}, journal = {Journal of Dentomaxillofacial}, issn = {}, eissn = {}, year = {2014} } @article{ author = {DehghaniNazhvani, Ali and Khosropanah, Hengameh and Rezai, Mostafa and Moradi, Mahsa and Moradi, Ahm}, title = {In vitro Evaluation of Dentin Surface Irradiated by Neodymium-doped: Yttrium Aluminum Garnet Laser (Nd: YAG) Using Scanning Electron Microscopy}, abstract ={Introdouction: Dentinal hypersensitivity (DH) is one of the most painful chronic problems reported in dental offices. Various methods have been applied for the treatment of DH. However, majority of them are either ineffective or last for a short period of time. It has been reported that lasers, particularly Neodymium- doped: Yttrium Aluminum Garnet laser (Nd: YAG), can be helpful in the treatment of this disease. However, systematic reviews have shown that the available evidence for its effectiveness is weak. The aim of this study was to evaluate the Nd: YAG laser-prepared dentine surface with different powers and energies. Materials and methods: Fifteen extracted human molars were randomly divided into five groups receiving different powers and energies of Nd:YAG laser (Group A: power: 0.7 W, energy: 70 mJ Group B: power: 0.9 W, energy: 90 mJ Group C: power: 1.1 W, energy: 110 mJ Group D: power: 1.3 W, energy: 130 mJ and Group E: power: 1.5 W, energy: 150 mJ) in three pulse modes. The surfaces of the specimens were then studied using scanning electron microscopy (SEM). Results: With output power of 0.7 W in single, double and triple radiation modes, sealed dentinal tubules and absence of smear layer were observed. The surfaces prepared by using higher powers of 0.9, 1.1, 1.3, and 1.5 W showed the same features as those prepared with 0.7 W power in single and double pulse modes. In addition, carbonization centers were observed when single pulse mode with power of 1.5 W was employed. Conclusion:All combinations of power and energy tested in this study were found to have produced sealing of the dentinal tubules. However, 0.7 W power in double and triple radiation modes is suggested to be the best option for the clinician, due to having the lowest energy, fewer side effects and lower risk of physical dangers, as well as decreasing the occurrence of unwanted carbonizations. Experimental and clinical studies, especially randomized clinical trials, comparing the effects of Nd: YAG lasers with conventional methods are recommended.}, Keywords = {Lasers ,Solid-State,Dentin Sensitivity ,Microscopy ,Electron ,Scanning}, volume = {3}, Number = {3}, pages = {35-39}, publisher = {}, title_fa = {}, abstract_fa ={}, keywords_fa = {}, doi = {10.18869/acadpub.3dj.3.3.35}, url = {http://3dj.gums.ac.ir/article-1-129-en.html}, eprint = {http://3dj.gums.ac.ir/article-1-129-en.pdf}, journal = {Journal of Dentomaxillofacial}, issn = {}, eissn = {}, year = {2014} }