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Showing 4 results for Zargar
Comparing the distribution of tension in mesial and distal rests in  abutment teeth adjacent to free end partial removable dentures in movements toward tissue
F. Gerami Panah , Haghpanahi, Zargarani,
Volume 9, Issue 1 (8 1996)
Abstract

Normal 0 false false false EN-US X-NONE AR-SA In this research, by using limited elements, distribution of tensions in mesial and distal rests on root surfaces of abutment teeth of removable partial dentures was studied. First mandibular premolar was divided into 48 triangular elements. mastication force  and thickness of covering tissue were considered 30 pounds and 2.5 mm respectively. During the movements toward the tissue, the tension on abutment teeth with mesial rests was lower and more uniform in comparison to distal rests.

 


Assessment of physical and solubility & disintegration properties of zinc cements used for operative dentistry and the comparison with the standard
Mb.  tavakoli , R. Tabarak , A.  zargar ,
Volume 17, Issue 4 (7 2005)
Abstract
Statement of Problem: Zinc contained cements are so important among dental material as they have many indications and used in different ways therefore evaluation of their physical properties is so important in dentistry.
Purpose: The purpose of this research was to measure some physical properties of zinc-contained cements used in restorative dentistry. These cements included: Zinc oxide-eugenol, Zinc phosphate and Zinc polycarboxylate. Physical properties measured in this research were compressive strength, and setting time also Solubility & Disintegration were evaluated.
Materials and Methods: To perform this research two packs of each cement type were provided from an Iranian company products as prototypes and German HARVARD Dental GmbH company products as proof samples. For compressive strength 11 samples provided from any type of cement. For setting time test, 16 samples provided from Zinc oxide-eugenol and 11 samples from two other types. For solubility &
disintegration beet, 11 samples provided only from Zinc oxide-eugenol cement. The results compared with standard.
Results: The results of Iranian product showed that compressive strength of Zinc oxide-eugenol- is I2.58±3 MPa, of Zinc phosphate cement is 37.2I±5.0 MPa and of Zinc polycarboxylate cement is 35.86±2.1 MPa.Setting time of Zinc oxide-eugenol cement is 2 9.04 ±0.7 1 min, of Zinc phosphate cement is 5.41 ±0.55 min and of Zinc polycarboxylate cement is 2.5±0.6 min. Solubility & disintegration of Zinc oxide-eugenol cement is 8.44±i.l%. None of these findings are in standard limit.
Conclusion: By the use of standard charts it is concluded that: Only compressive strength of Zinc oxide-eugenol cement is between standard limits and compressive strengths of two other types of the cements are less than standard limits. Also only setting time -of Zincoxide eugenol cement is in standard limit and setting times of two other types of the cements aren't in standard limit. The German samples results were in standard limit. Solubility & disintegration-of Zinc-oxide eugenol cement isn't in standard limit. Therefore it is concluded that all types of these cements are not standard for use.
Evaluation of linear tomography accuracy in localization of nasal fossa and maxillary sinus
Ar. Talaeipour , M. Panjnoush , R. Zargarpour ,
Volume 20, Issue 3 (4 2007)
Abstract

Background and Aim: Accurate measurement of bone height and width is essential prior to dental implant placement. The method of surgery as well as, the type and size of implants are determined according to dimensions of the residual bone. The purpose of this study was to evaluate the accuracy of linear tomography in localization of the floor of nasal fossa and maxillary sinus, and to determine the width of maxillary bone at the designated site for implant placement.

Materials and Methods: In this test evaluation study, the vertical distances between the alveolar crest and the floor of nasal fossa and the floor of maxillary sinus was measured by the tomographic slices in 12 sites of three dry human skulls. In addition, the width of maxillary bone was measured at the same slices. The skulls were then sectioned through the marked places. Then the radiographic values were compared with the real values of bone sections.

Results: After correction of tomographic values by the magnification factor of the unit, the mean absolute measurement error for vertical values at nasal fossa and maxillary sinus area in tomographic slices were 0.28 mm (SD= 0.24) and 1.1 mm (SD= 0.68) respectively. The mean absolute measurement error for maxillary width at the nasal fossa and maxillary sinus area were 0.65 mm (SD= 0.50) and 0.55 mm (SD= 0.45) respectively. 100 % of vertical values at nasal fossa area and 50 % of vertical values at maxillary sinus area were within ± 1 mm error limit. In addition, 50 % of width measurements at nasal fossa area and 83.3 % at maxillary sinus area were within ± 1 mm error limit.

Conclusion: The linear tomography is more accurate in height estimation at nasal fossa area and in width estimation at maxillary sinus area. The accuracy of linear tomography in height and width estimation is within acceptable limits at both nasal fossa and maxillary sinus area.


Evaluation of Covid-19 protection knowledge and practice of dentists in Isfahan in clinical environment
Parichehr Behfarnia, Omid Fakheran, Zahra Zargar,
Volume 35, Issue 0 (5-2022)
Abstract
Background and Aims: The 2019 coronavirus pandemic has resulted in a lot of pressure on health systems around the world. The risk of transmission of infection in dentistry is significantly high. The aim of this study was to evaluate Covid-19 protection knowledge and practice of dentists in Isfahan in clinical environment.
Materials and Methods: In this study which was performed in April 2021 by available sampling method, an online questionnaire was used as a data collection tool. Questions included demographic characteristics, knowledge of proper protective protocols, protection protocols taken against Covid-19, and the prevalence of Covid-19 infection. Descriptive and analytical analyzes were performed using SPSS26 software including frequency distribution tables, graphs, independent t-test, and Pearson and Spearman correlation coefficients.
Results: 310 questionnaires were collected with complete answers. 87.4% of dentists had moderate and high knowledge of proper protective protocols against Covid-19. The mean knowledge score had no significant relationship with the demographic characteristics of age (P=0.59), gender (P=0.31 and r=0.05), work experience (P=0.16 and r=0.07) and degree (0.33=P). In the pandemic period, 87% of dentists treated dental emergencies and 40% delayed the dental treatment for patients with high risk of Covid-19. Dentists used personal protective equipment correctly. Among all the included dentists, 75% used high protection masks, 75% used face shields, 67% used hats, and 60% used sterile gowns in all of their treatment activities. The clinical environment was equipped well to prevent spreading of Covid-19. The results showed that 55.8% of the participants had one or more similar signs/symptoms of Covid-19 and 9% had a positive SARS-CoV-2 test during the last months.
Conclusion: The majorities of dentists had enough knowledge of proper protective protocols against Covid-19 and efficiently used all protections while performing dental procedures.
 

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