The effect of prolonged holding time in firing schedules on the bond strength between the zirconia core and veneered porcelain

Ning Xu; Chiharu Shin; Yuji Fukui; Satoshi Omori; Shiho Otake; Reina Nemoto; Wataru Komada; Naosuke Kumagae; Keiichi Yoshida; Hiroyuki Miura

doi:10.47416/apjod.13-0189

Ning Xu, Chiharu Shin , Yuji Fukui, Satoshi Omori, Shiho Otake, Reina Nemoto, Wataru Komada, Naosuke Kumagae, Keiichi Yoshida, Hiroyuki Miura

Author information

Ning Xu [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Chiharu Shin [Japan] Corresponding author
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Yuji Fukui [Japan]
International Exchange Center, Tokyo Medical and Dental University [Japan]
Satoshi Omori [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Shiho Otake [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Reina Nemoto [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Wataru Komada [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Naosuke Kumagae [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Keiichi Yoshida [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]
Hiroyuki Miura [Japan]
Fixed Prosthodontics, Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University [Japan]

Keywords: chipping, firing schedule, shear bond strength, thermocouple, zirconia ceramics

JOURNAL FREE ACCESS

2013 Volume 13 Issue 2 Pages 19-25

DOI https://doi.org/10.47416/apjod.13-0189

Details

Abstract

Purpose: The purpose of the present study was to determine the effect of prolonged holding time in firing schedule to the bonding strength of zirconia core to the veneered porcelain.

Materials and Methods: Twenty cubes of zirconia (Y-TZP, Cercon Base 47) were prepared and veneering ceramics (Vintage ZR) were layered. The bond strengths of zirconia core and layered porcelain with different holding time in firing schedule were evaluated by shearing test.

Results: The shear bond strengths of zirconia core and veneered porcelain with different holding time showed a statistically significant difference, 38.8±5.6 MPa (holding time; 1 minute) and 44.0±4.2 MPa (holding time; 21 minutes).

Conclusion: Prolonged holding time in firing schedule will improve the bond strength of zirconia core and veneered porcelain which reduce chipping failure of zirconia-based all ceramic restorations.

Corresponding author

Funder information

1.Fund name: Japan Society for the Promotion of Science

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