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Mohghegh, Mina, Baseri, Sajjad, Kalantari, Mohamad Hassan, Giti, Rashin, Ghoraishian, Seyed Ahmad. (1401). Influence of Sintering Temperature on the Marginal Fit and Compressive Strength of Monolithic Zirconia Crowns. سامانه مدیریت نشریات علمی, 23(3), 307-313. doi: 10.30476/dentjods.2021.90024.1459
Mina Mohghegh; Sajjad Baseri; Mohamad Hassan Kalantari; Rashin Giti; Seyed Ahmad Ghoraishian. "Influence of Sintering Temperature on the Marginal Fit and Compressive Strength of Monolithic Zirconia Crowns". سامانه مدیریت نشریات علمی, 23, 3, 1401, 307-313. doi: 10.30476/dentjods.2021.90024.1459
Mohghegh, Mina, Baseri, Sajjad, Kalantari, Mohamad Hassan, Giti, Rashin, Ghoraishian, Seyed Ahmad. (1401). 'Influence of Sintering Temperature on the Marginal Fit and Compressive Strength of Monolithic Zirconia Crowns', سامانه مدیریت نشریات علمی, 23(3), pp. 307-313. doi: 10.30476/dentjods.2021.90024.1459
Mohghegh, Mina, Baseri, Sajjad, Kalantari, Mohamad Hassan, Giti, Rashin, Ghoraishian, Seyed Ahmad. Influence of Sintering Temperature on the Marginal Fit and Compressive Strength of Monolithic Zirconia Crowns. سامانه مدیریت نشریات علمی, 1401; 23(3): 307-313. doi: 10.30476/dentjods.2021.90024.1459

Influence of Sintering Temperature on the Marginal Fit and Compressive Strength of Monolithic Zirconia Crowns

Journal of Dentistry
مقاله 21، دوره 23، شماره 3 - شماره پیاپی 76، آذر 2022، صفحه 307-313    اصل مقاله (396.25 K)
نوع مقاله: Original Article
شناسه دیجیتال (DOI): 10.30476/dentjods.2021.90024.1459
نویسندگان
Mina Mohghegh* 1؛ Sajjad Baseri2؛ Mohamad Hassan Kalantari1؛ Rashin Giti1؛ Seyed Ahmad Ghoraishian1
1Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
2Postgraduate Student, Dept. of Prosthodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran.
چکیده
Statement of the Problem: Increasing the sintering temperature is suggested by some manufacturers as a way to enhance the translucency of monolithic zirconia crowns. Meanwhile, its effect on the marginal fit and compressive strength of the restoration is not fully understood.
Purpose: This study aimed to evaluate the effect of sintering temperature on the marginal fit and compressive strength of monolithic zirconia crowns.
Materials and Method: In this in vitro study, thirty crowns of pre-sintered monolithic zirconia were milled and sintered in a special furnace at either 1450°C or 1550°C (n=15 per group). The marginal gaps were measured at 18 spots on the dies with a digital microscope. To evaluate the compressive strength, the specimens were cemented on brass dies by using conventional glass ionomer cement. Vertical load was applied by a universal testing machine until fracture. One-way ANOVA test was used to analyze the results (α=0.05).
Results: The marginal gap was not significantly different between the two groups (p= 0.062). A significantly higher mean value of compressive strength was observed in crowns sintered at 1550°c (1988.27±635.09 N) than those sintered at 1450 °c (1514.27±455.11 N) (p= 0.026).
Conclusion: Although increasing the sintering temperature would not affect the marginal gap of monolithic zirconia crowns, it could significantly improve the compressive strength of zirconia restorations.
کلیدواژه‌ها
Compressive strength؛ Experimental study؛ Marginal fit؛ Monolithic zirconia؛ Sintering temperature
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