Study of heat transfer to the implant-bone interface induced by grinding of occlusal surface of implant gold prosthesis

Jae-Young Jo; Sun-Nyo Kang; Chang-Mo Jeong; Mi-Jung Yun; Jung-Bo Huh; Young-Chan Jeon

doi:10.4047/jkap.2012.50.1.29

Journal List > J Korean Acad Prosthodont > v.50(1) > 1034718

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Jo, Kang, Jeong, Yun, Huh, and Jeon: Study of heat transfer to the implant-bone interface induced by grinding of occlusal surface of implant gold prosthesis

Original Article

The Journal of Korean Academy of Prosthodontics

The Journal of Korean Academy of Prosthodontics 2012; 50(1): 29-35.

Published online: 31 January 2012

DOI: https://doi.org/10.4047/jkap.2012.50.1.29

Study of heat transfer to the implant-bone interface induced by grinding of occlusal surface of implant gold prosthesis

Jae-Young Jo, DDS, MSD, Sun-Nyo Kang, DDS, MSD, Chang-Mo Jeong, DDS, MSD, PhD, Mi-Jung Yun, DDS, MSD, Jung-Bo Huh, DDS, MSD, PhD, Young-Chan Jeon, DDS, MSD, PhD

Department of Prosthodontics, School of Dentistry, Pusan National University, Yangsan, Korea.

Corresponding Author: Young-Chan Jeon. Department of Prosthodontics, School of dentistry, Pusan National University, Beomeo-ri, Mulgeum-eup, Yangsan, 626-870, Korea. +82 55 360 5130, jeonyc@paran.com

Received 23 December 2011 Revised 2 January 2012 Accepted 6 January 2012

Abstract

Purpose

The purpose of this study was to analyze temperature change along the implant-bone interface induced by grinding the occlusal surface of implant gold prosthesis and to compare the temperature generated by grinding of prosthesis with different cooling methods.

Materials and methods

The experimental gold prostheses were fabricated with dental gold alloy and castable abutment. The prostheses had 3 cylindrical protrusions on the occlusal surface with 1mm in height. Temperature was measured using 16 thermocouple wires attached to the implant fixture surface and the fixture was embedded in an acrylic resin block inside the 37℃ water bath. Cylinders were grinded for a period of 30 second with a low-speed handpiece with green stone point. One cylindrical protrusion was grinded without cooling, the second one was grinded with air blow, and the third one was grinded with water-spray.

Results

The mean maximum temperature was measured more than 47℃ of the implant and the maximum temperature was measured at the cervical portion of the implant in the group without cooling. There was statistically significant difference between the group without cooling and the groups with cooling (P<.05). However, there was no significant difference at all portion of implant in the groups with cooling (P>.05).

Conclusion

The results of this study support that the grinding of implant gold prosthesis without cooling may damage the peri-implant tissue. The continuous use of air blow and water-spray adjacent to prosthesis during the grinding of implant gold prosthesis may prove to be beneficial for cooling of the implant.

Keywords: Implant-bone interface, Heat transfer, Grinding, Cooling

Figures and Tables

Fig. 1

Implant fixture and abutment.

A: GS III implant fixture, B: Goldcast abutment.

Fig. 2

Schematic diagram of experimental cast gold prosthesis.

A: Lateral shape, B: Occlusal shape.

Fig. 3

Schematic diagram of thermocouples.

A: 16 thermocouple wires attached to the implant fixture surface, B: The fixture divided into 6 area from top to apex of implant.

Fig. 4

Temperature measuring apparatus.

Fig. 5

LabView2009 monitoring system.

Fig. 6

Mean maximum temperature induced by grinding without cooling.

Fig. 7

Mean maximum temperature induced by grinding without cooling at cervix of implant.

Fig. 8

Mean maximum temperature induced by grinding under air blow.

Fig. 9

Mean maximum temperature induced by grinding under water spray.

Fig. 10

Mean maximum temperature at each level of implant fixture under cooling condition (^*P<.05, Turkey HSD).

Table 1

Mean maximum temperature and standard deviation (℃) induced by grinding of the experimental cast gold prosthesis under three cooling condition

N: No cooling, A: Air blow, W: Water spray

Different lowercase letters in same column and different uppercase letters in same row indicate significant difference (P<.05, Turkey HSD).

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