School of Dentistry
Permanent URI for this communityhttps://dspace.tbzmed.ac.ir/handle/123456789/3
Tabriz Faculty of Dentistry is located in Tabriz, capital city of East Azarbayjan Province and is the only dental schoolwestern Iran.
Tabriz Dental School was founded in 1986. The first students entered in 1987, graduating in 1993. In 1997 the school moved into a new and modern building, covering 22,000 square meters.
The school expanded its educational programs in 2001 by offering its postgraduate specialty courses in three fields and at present it offers seven postgraduate specialty courses.
Prospects for the Future
We are determined, by asking for assistance from the Almighty, to promote the school's academic excellence, raise the standards of oral health in the community and join the circle of highly qualified dental schools in the country through optimizing instruction standards and innovative research programs.
Mission
Tabriz Faculty of Dentistry as the only dental school in the north-western Iran and as a part of a major university has combined and enjoyed the endeavors of competent and qualified academic staff with appropriate facilities and has committed itself to:
Training highly qualified general practitioners and specialists;
Updating the knowledge and skill of the graduates working in the north-western Iran;
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Item type: Item , Evaluation of micro gap size and microbial microleakage at the implant fixture- abutment interface in original and compatible abutments(tabriz university of medical science, faculty of dentistry, 2025) Sharifi, Reza; Ghasemi, Shima; prosthodontics; Ghaffari, TaherehIntroduction: Microgap between implant and abutment can lead to frequent mechanical and biological problems such as abutment screw breakage or peri-implantitis. In Korean implants, different systems are compatible with each other due to the similar geometry of the abutment connection area. Due to the high cost of the implant and the limited access to parts, if the results of using compatible abutments are acceptable, compatible abutments can be used instead of the original, saving costs and allowing dentists access to different abutments. will be more Considering that these systems are commonly used instead of each other, the purpose of this study was to compare bacterial microleakage and microgap in the Korean Osstem, Dio and Cis systems, whose regular abutment is compatible with each other. Method: In this study, out of 12 implant abutments, including four Osstem system abutments (Osstem implant Seoul, South Korea) (length = 7; diameter = 4.5, gh = 3 mm), 4 system abutment (Dio implant, Seoul, South Korea (length = 7; diameter = 4.5, gh = 3 mm) and 4 system abutments (medimecca, Seoul, South Korea) Cis (length = 7; diameter = 4.5, gh = 3 mm) were used and all these abutments were connected to Osstem fixtures (regular size, diameter 4.5 and length 11.5 mm) ), whose inner surface was contaminated with bacterial suspension. Bacterial contamination was measured at 5, 24, and 48 hours. Microgap size was measured at four points by electron microscope. One-way analysis of variance, Kruskal-Wallis test and SPSS version 25 software were used to compare microgap and miroleakage between the studied groups. Results: the mean microgap in the Dio group was higher than the mean in the other two groups. There was no significant difference between the mean microgap in Osstem group and Cis group. In the present study, there was no statistically significant difference between the mean number of colonies (CFU) in the groups under investigation at any of the four evaluation times. Conclusion: The results of the present study showed that the microgap in the Dio group was higher than the other two groups, and the microgap in the Osstem group was similar to that of the Cis group. In the present study, there was no difference in the number of colonies (CFU) in the groups under investigation at any of the four evaluation times.Item type: Item , Effect of Screw Head Design on Implant Abutment Screwhead Deformation after Repeated Closing and Opening Cycles(Tabriz University of Medical Sciences, School of Dentistry, 2020) Mahmoudzadeh, Mohammad hasan; Ghasemi, Shima; Dental Prosthesis; Nourizade, AminThe implant has gained worldwide acceptance in recent years and its usage is increasing daily. Opening and closing of the prosthetic components of the implant are done with various designed screws. The head of screw, in two very common designs is in the shape of hexagons and stellar. The purpose of this study is comparing the rate of the head screw transformation in the hexagonal and the stellar shape after consecutive opening and closing. Materials and Methods Two fixtures were used. The fixtures were then fixed vertically in plaster blocks using Die Stone, then placed on each abutment sample, and the torque value of N.Cm25 was applied by using the abutment screw which has been recommended by manufacturing firm. Six abutment screws out of total twelve screws of related firm are used in each fixture. The samples were examined by 50-magnification under Nicon stereo microscope model C-DS. The amount of changes of the head screw (outline) in different shapes was recorded by AutoCAD software .Then, the difference of the area of consecutive samples between the hexagonal and stellar geometric shapes of the screw was calculated. Statistical analysis was performed using spss24 software and P <0.05 was considered significant. Results By increasing the number of opening and closing, the screw area decreased in both hexagonal and stellar geometrical shapes, and at all stages except stage 0 to 50, the changes in stellar screw were greater than the hexagon screw. In stage 0 to 50 the area changes were 0.15 and were less in the stellar screw than in the hexagon screw. These changes were statistically significant at 100 to 200 and 200 to 300 stages (P <0.05).The area in the hexagonal screw from stage 0 to 300 decreased by 2.81 units and in the stellar screw by 4.15 units. There was a statistically significant difference between the area values in the number of different opening and closing in both types of hexagonal and stellar screws (P <0.001). Also, the area of the head of both screws in all numbers of openings and closings was significantly different of each other (P <0.001). Conclusion By increasing the number of opening and closing the screw area in both hexagonal and stellar geometrical forms has decreased. Also, the amount of area changes in all stages was higher than hexagonal screw, comparing with stellar screw except the 0-50 cycle. The headof screw in stellar shape has more depreciation comparing with hexagonal shape (at the number of openings and closing over 100 times).Item type: Item , The Effect of Listerine Mouthwash on implants treatment success Factors(Tabriz University of Medical Sciences, School of dentistry, 2018) motaman Karimi, samin; surgery; Khorshidi, RezaIntroduction: Implants are undoubtedly the best alternative for missing teeth; however, there is no valid evidence or a definitive therapeutic proposal about diet and strategy to remove and even reduce complications as well as improve the quality and probability of success of implant therapy. Therefore, the current maintenance regimes such as mouthwashes cannot be considered ineffective in improving the quality of the treatment and increasing the likelihood of success and reducing the complications and even the failure of treatment. Accordingly, there is a definite need for tests and studies for finding appropriate regime and care strategies for increase of the likelihood of success of the dental implants and reducing its complications. The aim of this study was to investigate the effect of Listerine mouthwash on the indicators of success of implant treatment. Materials and Methods: This study was a case-control study. The statistical population included 46 implant patients referred to the Implant Department of Tabriz Faculty of Dentistry which lasted for at least one year from their implant placement. These 46 patients receiving treatment were divided into two groups of 23 patients including patients with successful implant therapy and control group including patients with unsuccessful implant therapy after examination. The patients were examined by two indicators including probe depth index and probing bleeding index. In both case and control groups, we examined how many people have used Listerine mouthwash for at least two weeks in the first six months after implantation surgery. Findings: The study showed that there was no significant difference between the gender of the participants in the study and the study groups as well as the mean age of the participants in the study. The study also showed that Listerine mouthwash has a positive effect in reduction bleeding during probing. In this study, the mean of all variables related to the probe depth in the case group is less than that of the control group. There was no statistically significant difference between mean of any of the variables related to the depth of probing based on the use of mouthwash or non-use. This study also investigated the mutual effect between mouthwashes and groups. This study showed that there was no impact between probing depth except for DL. In other words, the effect of using mouthwash on the mean of these variables in both groups of cases and the control was the same except for the DL which in the case group, there was a significant difference between the mean of the DL variable based on the use or non-use. Conclusion: has a positive effect on the reduction of bleeding during probing. The mouthwash use does not have a statistically significant effect on the depth of probing, but in the description of the effect is positive. Comparison of these two cases suggests that there is an important factor between the two indicators of probing depth and bleeding during probing, bleeding during probing and the effect of mouthwash on bleeding during probing is higher than the effect on probing depth.