TY - JOUR
T1 - Cutting efficiency of diamond burs operated with electric high-speed dental handpiece on zirconia
AU - Nakamura, Keisuke
AU - Katsuda, Yusuke
AU - Ankyu, Shuhei
AU - Harada, Akio
AU - Tenkumo, Taichi
AU - Kanno, Taro
AU - Niwano, Yoshimi
AU - Egusa, Hiroshi
AU - Milleding, Percy
AU - Örtengren, Ulf
N1 - Publisher Copyright:
© 2015 European Journal of Oral Sciences.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - Zirconia-based dental restorations are becoming used more commonly. However, limited attention has been given to the difficulties experienced, concerning cutting, in removing the restorations when needed. The aim of the present study was to compare the cutting efficiency of diamond burs, operated using an electric high-speed dental handpiece, on zirconia (Zir) with those on lithium disilicate glass-ceramic (LD) and leucite glass-ceramic (L). In addition, evaluation of the cutting efficiency of diamond burs on Zir of different thicknesses was performed. Specimens of Zir were prepared with thicknesses of 0.5, 1.0, 2.0, and 4.0 mm, and specimens of LD and L were prepared with a thickness of 1.0 mm. Cutting tests were performed using diamond burs with super coarse (SC) and coarse (C) grains. The handpiece was operated at 150,000 rpm with a cutting force of 0.9 N. The results demonstrated that cutting of Zir took about 1.5- and 7-fold longer than cutting of LD and L, respectively. The SC grains showed significantly higher cutting efficiency on Zir than the C grains. However, when the thickness of Zir increased, the cutting depth was significantly decreased. As it is suggested that cutting of zirconia is time consuming, this should be taken into consideration in advance when working with zirconia restorations.
AB - Zirconia-based dental restorations are becoming used more commonly. However, limited attention has been given to the difficulties experienced, concerning cutting, in removing the restorations when needed. The aim of the present study was to compare the cutting efficiency of diamond burs, operated using an electric high-speed dental handpiece, on zirconia (Zir) with those on lithium disilicate glass-ceramic (LD) and leucite glass-ceramic (L). In addition, evaluation of the cutting efficiency of diamond burs on Zir of different thicknesses was performed. Specimens of Zir were prepared with thicknesses of 0.5, 1.0, 2.0, and 4.0 mm, and specimens of LD and L were prepared with a thickness of 1.0 mm. Cutting tests were performed using diamond burs with super coarse (SC) and coarse (C) grains. The handpiece was operated at 150,000 rpm with a cutting force of 0.9 N. The results demonstrated that cutting of Zir took about 1.5- and 7-fold longer than cutting of LD and L, respectively. The SC grains showed significantly higher cutting efficiency on Zir than the C grains. However, when the thickness of Zir increased, the cutting depth was significantly decreased. As it is suggested that cutting of zirconia is time consuming, this should be taken into consideration in advance when working with zirconia restorations.
KW - Cutting efficiency
KW - Diamond burs
KW - Leucite
KW - Lithium disilicate
KW - Zirconia
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U2 - 10.1111/eos.12211
DO - 10.1111/eos.12211
M3 - Article
AN - SCOPUS:84941259408
VL - 123
SP - 375
EP - 380
JO - European Journal of Oral Sciences
JF - European Journal of Oral Sciences
SN - 0909-8836
IS - 5
ER -