AN IN VITRO STUDY ON THE EFFECT OF THE TEMPERATURE OF CYLINDERS AND LINER ON THE DIMENSIONS OF CASTING POSTS IN BASE METALS

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SABOUNI M.R.; GHANBARZADEH JALIL; GOUHARIAN R.; ESMAEILI HABIB ELAH

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Journal: Journal of Mashhad Dental School Year:2006 | Volume:29 | Issue:3-4 Page(s): 215-222

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Title

AN IN VITRO STUDY ON THE EFFECT OF THE TEMPERATURE OF CYLINDERS AND LINER ON THE DIMENSIONS OF CASTING POSTS IN BASE METALS

Author(s)

SABOUNI M.R. | GHANBARZADEH JALIL | GOUHARIAN R. | ESMAEILI HABIB ELAH | Issue Writer Certificate

Keywords

METAL CYLINDERQ4

BASE METALQ4

LINERQ3

CASTING POSTQ3

Abstract

Introduction: CASTING POSTs are recommended for endodontically treated teeth, specially in cases with extensive damaged crowns. Because the length and diameter of the post are effective in generating stress on the roots, and can be influenced according to the casting conditions, the purpose of this research was to study the effect of using LINERs and the temperature of bum out on the dimensions of the CASTING POSTs in BASE METALs.Materials & Methods: In this experimental study, 80 acrylic posts with the length of 12.095mm and the diameter of 2.096mm were made.On top of each post a reference point was contrived and the posts were grouped into 4 groups of 20. In the first group, humidified LINER and casting temperature of 900°C were used, the second group was without LINER and the temperature was 900°c, the third group was with humidified LINER and temperature of 600°C and the fourth group was without LINER and was casted in 600°C temperature. The lengths of the posts were measured from top to the bottom in the center (diameter in the upper most part in the reference point) with a metallurgy microscope and the results were statistically compared using student-t, Mann-Whitney and Kruskal-wallis tests.Results: Mean and standard deviation of the acrylic post lengths were obtained. The difference (0. 127mm) was significant (P<0.001). Also, mean and standard deviation of the diameter of the acrylic posts (2.87mm±0.1.118) was significantly less than that of metal post (2.97mm±0.166), (P<0.001). Differences in length was significant among studied groups so that in the group with 600°c temperature and without LINER, the least measures occurred compared to the other groups (P=0.001). Difference in the diameter of the acrylic and metal posts in the four groups showed that the use of 600°C temperature without humidified LINER produced the least differences compared with the other groups (P=0.001).Conclusion: It can be concluded that the best condition for investing and casting the CASTING POSTs is 600°c temperature without using the LINER.

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APA: Copy

SABOUNI, M.R., GHANBARZADEH, JALIL, GOUHARIAN, R., & ESMAEILI, HABIB ELAH. (2006). AN IN VITRO STUDY ON THE EFFECT OF THE TEMPERATURE OF CYLINDERS AND LINER ON THE DIMENSIONS OF CASTING POSTS IN BASE METALS. JOURNAL OF MASHHAD DENTAL SCHOOL, 29(3-4), 215-222. SID. https://sid.ir/paper/74120/en

Vancouver: Copy

SABOUNI M.R., GHANBARZADEH JALIL, GOUHARIAN R., ESMAEILI HABIB ELAH. AN IN VITRO STUDY ON THE EFFECT OF THE TEMPERATURE OF CYLINDERS AND LINER ON THE DIMENSIONS OF CASTING POSTS IN BASE METALS. JOURNAL OF MASHHAD DENTAL SCHOOL[Internet]. 2006;29(3-4):215-222. Available from: https://sid.ir/paper/74120/en

IEEE: Copy

M.R. SABOUNI, JALIL GHANBARZADEH, R. GOUHARIAN, and HABIB ELAH ESMAEILI, “AN IN VITRO STUDY ON THE EFFECT OF THE TEMPERATURE OF CYLINDERS AND LINER ON THE DIMENSIONS OF CASTING POSTS IN BASE METALS,” JOURNAL OF MASHHAD DENTAL SCHOOL, vol. 29, no. 3-4, pp. 215–222, 2006, [Online]. Available: https://sid.ir/paper/74120/en

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