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KMID : 1023820160080010043
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The Journal of Advanced Prosthodontics
2016 Volume.8 No. 1 p.43 ~ p.52
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Wear of primary teeth caused by opposed all-ceramic or stainless steel crowns
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Choi Jae-Won
Bae Ik-Hyun
Noh Tae-Hwan
Ju Sung-Won
Lee Tae-Kyoung
Ahn Jin-Soo
Jeong Tae-Sung
Huh Jung-Bo
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Abstract
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PURPOSE : This study was conducted to evaluate the effects of full-coverage all-ceramic zirconia, lithium disilicate glass-ceramic, leucite glass-ceramic, or stainless steel crowns on antagonistic primary tooth wear.
MATERIALS AND METHODS : There were four study groups: the stainless steel (Steel) group, the leucite glass-ceramic (Leucite) group, the lithium disilicate glass-ceramic (Lithium) group, and the monolithic zirconia (Zirconia) group. Ten flat crown specimens were prepared per group; opposing teeth were prepared using primary canines. A wear test was conducted over 100,000 chewing cycles using a dual-axis chewing simulator and a 50 N masticating force, and wear losses of antagonistic teeth and restorative materials were calculated using a three-dimensional profiling system and an electronic scale, respectively. Statistical significance was determined using One-way ANOVA and Tukey's test (P<.05).
RESULTS : The Leucite group (2.670±1.471 mm3) showed the greatest amount of antagonist tooth wear, followed by in decreasing order by the Lithium (2.042±0.696 mm3), Zirconia (1.426±0.477 mm3), and Steel groups (0.397±0.192 mm3). Mean volume losses in the Leucite and Lithium groups were significantly greater than in the Steel group (P<.05). No significant difference was observed between mean volume losses in the Zirconia and Steel groups (P>.05).
CONCLUSION : Leucite glass-ceramic and lithium disilicate glass-ceramic cause more primary tooth wear than stainless steel or zirconia.
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KEYWORD
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Leucite porcelain, Lithium disilicate porcelain, Zirconia, Primary tooth, Wear
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