Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
Smile Analyzer: A Software Package for Analyzing the Characteristics of the Speech and Smile
1
5
EN
Roozbeh
Rashed
Dental Research Center, Department of Orthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Farzin
Heravi
Dental Material Research Center, Department of Orthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Leila
Raziee
Dental Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
10.22038/jdmt.2013.47
Taking into account the factors related to lip-tooth relationships in orthodontic diagnosis and treatment planning is of prime importance. Manual quantitative analysis of facial parameters on photographs during smile and speech is a difficult and time-consuming job. Since there is no comprehensive and user-friendly software package, we developed a software program called "Smile Analyzer" in the Department of Orthodontics of Mashhad Faculty of Dentistry for measuring the parameters related to lip-tooth relationships and other facial landmarks on the photographs taken during various facial expressions. The software was designed using visual basic. NET and the ADO. NET was used for developing its Microsoft Access database. The program runs on Microsoft Windows. It is capable of analyzing many parameters or variables in many patients' photographs, although 19 more common variables are previously defined as a default list of variables. When all variables are measured or calculated, a report can be generated and saved in either PDF or MS Excel format. Data are readily transferable to statistical software like SPSS for Windows. <br/>
Smile,smile analyzer,Software,Speech
https://jdmt.mums.ac.ir/article_47.html
https://jdmt.mums.ac.ir/article_47_a63d02613b27ec92f80b5bdcee8c413b.pdf
Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
The Effect of Abutment Surface Roughness on the Retention of Implant-Supported Crowns Cemented with Provisional Luting Cement
6
10
EN
Jalil
Ganbarzadeh
Dental Research Center, Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Mohammad Reza
Nakhaei
Dental Research Center, Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Farid
Shiezadeh
General Dentist, Mashhad, Iran
Seyyed Mohammad
Abrisham
Dental Research Center, Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
10.22038/jdmt.2013.84
Introduction: Surface roughness can increase the retention of castings by ridges and grooves that are microretentive. This study compared the retention of implant-supported crowns when used with 3 different surface roughness abutments and one temporary cement. Methods: Thirty solid abutments (ITI), 4 mm high, were divided into three groups randomly. In the first group, 10 abutments were roughened with sandblast (50-µm aluminum oxide) and in the second group, 10 abutments were roughened with diamond bur. The third group had no surface treatment. Then, thirty implant fixture analogs (ITI) were placed in the center of acrylic cylinders. After that a solid abutment was tightened on the each fixture analog with 35 N/cm force. Thirty base metal crowns were made on the 4 mm ITI abutment analogs using plastic coping. The prepared copings were cemented on the abutments by TempBond temporary cement and finally, crowns were pulled from the abutment in a universal test machine at a cross speed of 0.5cm/min. Results: The mean tensile strength in sandblasted, bur treated, and control group were 64.38±8, 91.37±7.19, and 58.61±1.93, respectively. Bur treated group showed higher tensile strength in comparison with two other groups. Conclusion: Surface modification of implant abutment by diamond bur may be an effective method to increase retention of crown when TempBond is used.
Abutment,dental implant,Restoration,Retention,surface roughness
https://jdmt.mums.ac.ir/article_84.html
https://jdmt.mums.ac.ir/article_84_7a9b94b65e18e00ca389c2ca67a1d7c9.pdf
Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
Evaluation of Survival Time of Tooth Color Dental Materials in Primary Anterior Teeth
11
18
EN
Behjat-Al-Molook
Ajami
Dental Material Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Masoumeh
Ebrahimi
Dental Material Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Abbas
Makarem
Dental Material Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Taraneh
Movahhed
Dental Material Research Center, Department of Pediatric Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Amir Reza
Motamedi
Dentist, Mashhad, Iran
10.22038/jdmt.2013.87
Introduction: In restorative dentistry, selecting the proper material is an important factor for clinical success. The objective of this study was clinical evaluation of survival time of three tooth color materials in primary anterior teeth. Methods: In this interventional clinical trial study, 94 deciduous anterior teeth (36 teeth in boys, 58 teeth in girls) belonging to 3-5 year old children in Pediatric Department of Mashhad Faculty of Dentistry, Iran were selected. Selective dental materials included compoglass, glass-ionomer Fuji II LC, and composite resin. The data were analyzed with Kaplan–Meyer and Log rank test. Results: compoglass had the highest survival time in comparison with composite and glass-ionomer. Nine months retention rate for teeth restored with compoglass, composite resin and glass-ionomer were estimated: 95%, 21%, and 12.5%, respectively. Conclusion: Compoglass can be a suitable material for anterior primary teeth restoration
Dental restoration,primary teeth,survival time
https://jdmt.mums.ac.ir/article_87.html
https://jdmt.mums.ac.ir/article_87_590deed9c9ce650c53b6899e3a3c2c7d.pdf
Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
Comparative Assessment of Nuclear and Nucleolar Cytochemical Parameters of Oral Epithelial Cells in Smokers and Non-Smokers by Methyl Green-Pyronin Staining
19
23
EN
Jahanshah
Salehinejad
Dental Research Center, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Nasser
Mahdavi-Shahri
Department of Biology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
Nooshin
Mohtasham
Dental Research Center, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Hamid
Ejtehadi
Department of Biology, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
Shahrzad
Adhami
Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Kerman University of Medical Sciences, Kerman, Iran
Mahdi
Pazouki
Dental Research Center, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
10.22038/jdmt.2013.88
<strong>Introduction:</strong> A strong relationship exists between cigarette smoking and the development of oral squamous cell carcinoma. Smoking can significantly increase cellular proliferation. Nevertheless, there is little reference in literature to the cytological assessment of oral mucosa in this respect. <strong>Methods:</strong> Changes in nuclear and neucleolar cytomorphometric parameters such as diameter, surface, number and color intensity, in cytologic smears which were collected from normal buccal mucosa of 30 cigarette smokers and 30 non smokers, using methyl green-pyronin staining were studied. <strong>Results:</strong> Our findings attested to smoking as significant inductive factor in cytochemistry as well as morphologic changes. <strong>Conclusion:</strong> This technique is a valuable tool
Cytochemistry,methyl green-pyronine,nucleolus,oral mucosa,Smoking
https://jdmt.mums.ac.ir/article_88.html
https://jdmt.mums.ac.ir/article_88_ef9ef20db818c77aac25195c7224e77f.pdf
Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
Mandibular Flexure in Anterior-Posterior and Transverse Plane on Edentulous Patients in Mashhad Faculty of Dentistry
24
28
EN
Azam Sadat
Madani
Dental Research Center, Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Nafiseh
Asadzadeh
Dental Research Center, Department of Prosthodontics, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Seyyed Hadi
Hosseini
Dentist, Mashhad, Iran
10.22038/jdmt.2013.89
Introduction: Angle and internal position of lateral pterygoid muscle leads to contraction over two half of the mandible in maximum opening and protrusion position so it can affects impression prosthetic procedures. The aim of this study was to evaluate the mandibular flexure in two transverse and antro-posterior dimensions. Methods: Seventy edentulous patients at Mashhad Faculty of Dentistry as the main group and 50 dentulous patients as the control group were selected. In these patients, transverse dimensions between second molar areas and also canine eminence from one side to another side, and longitudinal dimensions based on the distance between canine to second molar area at centric occlusion and maximum mouth opening were measured. Dimensional differences as the mandibular flexure were measured. Results: The mandibular dimensions in maximum opening and closed mouth were different. Average reduction in transverse dimension on second molar region at maximum mouth opening and closing position were almost equal to -0.0787 mm for target group and 0.7512 mm for control group. On anterior side, averages of these changes were equal to 0.3069 mm for target group and were 0.2254 mm for control group. Conclusion: Transverse dimensions in anterior region at maximum opening position are smaller than the same dimension at closed mouth in edentulous and dentulous patients.
Centric occlusion,edentulous patient,mandibular flexure,maximum opening
https://jdmt.mums.ac.ir/article_89.html
https://jdmt.mums.ac.ir/article_89_a76ac2044624ed1bb678dd2e6ed51540.pdf
Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
Finite Element Analysis of the Effect of Proximal Contour of Class II Composite Restorations on Stress Distribution
29
34
EN
Mohammad Javad
Moghaddas
Dental Research Center, Department of Operative Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Hamideh
Ameri
Dental Research Center, Department of Operative Dentistry, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Hossein
Abachizadeh
Department of Operative Dentistry, Faculty of Dentistry, Zahedan University of Medical Sciences, Zahedan, Iran
10.22038/jdmt.2013.90
Introduction: The aim of this study was to evaluate the effect of proximal contour of class II composite restorations placed with straight or contoured matrix band using composite resins with different modulus of elasticity on stress distribution by finite element method. Methods: In order to evaluate the stress distribution of class II composite restorations using finite element method, upper right first molar and second premolar were modeled. Proximal boxes were designed and restored with universal Z250 and packable P60 composite resins (3M ESPE) using two matrix systems: flat Tofflemire matrix and precurved sectional matrix. Finally models were evaluated under loads of 200 and 400 Newton at 90 degrees angle and the results were graphically illustrated in the form of Von Misses stresses. Results: In general the stress obtained under 400 Newton load was significantly greater than the stress of models under 200 Newton load. Von Misses stress distribution pattern of two different Z250 and P60 composites were very similar in all modes of loading and proximal contour. In all analyzed models there was a significant difference between models restored with Tofflemire matrix with flat contour and models restored with sectional matrix with curved contour. This difference was greater in first molar than second premolar. Conclusion: Use of a contoured matrix band results in less stress in class II composite resin restorations.
Class II,Finite element analysis,matrix band,posterior composite,proximal contour
https://jdmt.mums.ac.ir/article_90.html
https://jdmt.mums.ac.ir/article_90_e8c4cca4c1a1c8a5c0ac10305f0fc918.pdf
Mashhad University of Medical Sciences
Journal of Dental Materials and Techniques
2322-4150
2252-0317
1
1
2012
09
01
Calcifying Odontogenic Cyst with Complex Odontoma: Histological and Immunohistochemical Features
35
39
EN
Nooshin
Mohtasham
Oral and Maxillofacial Diseases Research Center, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Amin
Rahpeyma
Dental Research Center, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Saeedeh
Khajeh Ahmadi
Dental Research Center, Department of Oral and Maxillofacial Pathology, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
Mohsen
Merati
Department of Orthodontics and Dental Research Center, Faculty of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
10.22038/jdmt.2013.91
The calcifying odontogenic cyst (COC) is a rare odontogenic cyst. Only 2% of all odontogenic cysts and tumors are COC. COC associated with odontoma (COCaO) reported in 24% of COCs. COCaO presents a greater incidence in female, with a ratio of 2 to 1. The highest incidence of COCaO occurs during the second decade with a mean age of 16 years, most frequently occurring in the maxilla (61.5%). Here, we describe a classic case of COCaO of the maxillary incisor-canine region in 17-year-old girl, and discuss the clinicopathological features and immunohistochemical finding of this tumor.
Calcifying odontogenic cyst,histopathologic feature,immunohistochemical straining,odontoma
https://jdmt.mums.ac.ir/article_91.html
https://jdmt.mums.ac.ir/article_91_37c348aa0fd6c9ce08e964ce85f2cfc0.pdf