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Ghaffari, Tahereh, Nourizadeh, Amin, Shafiee, Elnaz, Mahboub, Farhang, Kalantari, Amir Reza. (1401). Compressive Strength of Temporary Crowns Made from Default design in Two Types of Software. سامانه مدیریت نشریات علمی, 24(1), 47-52. doi: 10.30476/dentjods.2022.89736.1433
Tahereh Ghaffari; Amin Nourizadeh; Elnaz Shafiee; Farhang Mahboub; Amir Reza Kalantari. "Compressive Strength of Temporary Crowns Made from Default design in Two Types of Software". سامانه مدیریت نشریات علمی, 24, 1, 1401, 47-52. doi: 10.30476/dentjods.2022.89736.1433
Ghaffari, Tahereh, Nourizadeh, Amin, Shafiee, Elnaz, Mahboub, Farhang, Kalantari, Amir Reza. (1401). 'Compressive Strength of Temporary Crowns Made from Default design in Two Types of Software', سامانه مدیریت نشریات علمی, 24(1), pp. 47-52. doi: 10.30476/dentjods.2022.89736.1433
Ghaffari, Tahereh, Nourizadeh, Amin, Shafiee, Elnaz, Mahboub, Farhang, Kalantari, Amir Reza. Compressive Strength of Temporary Crowns Made from Default design in Two Types of Software. سامانه مدیریت نشریات علمی, 1401; 24(1): 47-52. doi: 10.30476/dentjods.2022.89736.1433

Compressive Strength of Temporary Crowns Made from Default design in Two Types of Software

Journal of Dentistry
مقاله 8، دوره 24، شماره 1 - شماره پیاپی 78، خرداد 2023، صفحه 47-52    اصل مقاله (405.29 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.30476/dentjods.2022.89736.1433
نویسندگان
Tahereh Ghaffari1؛ Amin Nourizadeh* 1؛ Elnaz Shafiee2؛ Farhang Mahboub1؛ Amir Reza Kalantari3
1Dept. of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
2Dept. of Prosthodontics, Faculty of Dentistry, Tabriz Medical Sciences, Islamic Azad University, Tabriz, Iran.
3Specialized Student of Prosthodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
چکیده
Statement of the Problem: Various default values in each software can eventually lead to different crown thicknesses and affect their compressive strength.
Purpose: This study aimed to compare the compressive strength of temporary crowns made with the milling machine, designed in Exocad and 3Shape Dental System software.
Materials and Method: In this in vitro study, 90 temporary crowns were made and evaluated based on each software settings. For this purpose, a sound premolar was first scanned as a pre-operative model by 3Shape laboratory scanner. The standard tooth preparation and scanning were performed, and then the temporary crown files (designed by each software) were transferred to the Imes-icore 350i milling machine. A total of 90 temporary crowns (45 based on the file of each software) were made using poly methyl methacrylate (PMMA) vita cad-temp block. The value of compressive force displayed on the monitor was recorded at the first crack and the ultimate failure of the crown.
Results: The first crack and the ultimate strength of crowns designed with the Exocad software was 903.5±96N and 1490±139.3N and for crowns designed with 3Shape Dental System software was 1060.4±160.2N and 1691.1±73.9N, respectively. The amount of compressive strength of temporary crowns made with 3Shape Dental System was significantly higher than those made with Exocad software and this difference was statistically significant(p= 0.000).
Conclusion: The compressive strength of temporary dental crowns made by both softwares is in a clinically acceptable range, but considering that the average compressive strength in the 3Shape Dental System group was slightly higher than of the other group, it is preferable to design and fabricate with 3Shape Dental System software to increase the compressive strength of these crowns.
کلیدواژه‌ها
Fixed prosthesis؛ Temporary crown؛ Compressive strength؛ 3Shape Dental System software؛ Exocad software
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