不同表面处理对CAD/CAM树脂陶瓷复合材料弯曲强度及形貌的影响

doi:10.13591/j.cnki.kqyx.2026.04.007

Abstract

Abstract:

Objective To investigate the effects of different surface treatments on the flexural strength and surface morphology of CAD/CAM resin-ceramic composites. Methods Three resin-ceramic composites—UPCERA Hyramic, Shofu Block HC, and Vita Enamic were subjected to four surface treatments: no treatment (NT), 50 μm Al₂O₃ sandblasting (SB), hydrofluoric acid etching (HF), and Er:YAG laser etching (Er:YAG). The three-point flexural strength was tested immediately and after 10 000 thermal cycles in accordance with ISO 6872 standards. Surface morphology was examined using scanning electron microscopy (SEM). The flexural strength data were analyzed using one-way ANOVA, two-way ANOVA and LSD post hoc tests (α=0.05). Results Compared with the control group, the three-point flexural strength of all three resin-ceramic composites showed no significant change after HF treatment (P>0.05), while it decreased significantly after Er:YAG treatment and SB treatment, with the differences being statistically significant (P<0.05). After thermocycling, the strength of both Vita Enamic and Shofu Block HC decreased significantly in all groups (P<0.05), whereas the SB and Er:YAG groups of Vita Enamic showed no statistically significant decline (P>0.05). SEM analysis revealed alterations in surface morphology in all treated groups before and after thermocycling, with the HF group displaying the least pronounced changes. Conclusion For CAD/CAM resin-ceramic composites, hydrofluoric acid etching has the least detrimental effect on flexural strength and surface morphology. Caution should be exercised when employing Er:YAG laser etching or sandblasting treatments. However, for Vita Enamic, the influence of both sandblasting and Er:YAG laser treatment on the flexural strength is minimal after thermocycling.

Key words: CAD/CAM resin-ceramic composite, flexural strength, thermal cycling, scanning electron microscopy (SEM), Er:YAG laser

CLC Number:

R783.1

YANG Yaqian, ZHANG Mengmeng, REN Guanghui, BI Wenya, ZONG Min. Effects of different surface treatments on flexural strength and morphology of CAD/CAM resin-ceramic composites[J]. Stomatology, 2026, 46(4): 277-282.

Figures/Tables 5

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References 25

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材料名称	材料品牌	生产国	材料类型	组成成分
材料名称	材料品牌	生产国	材料类型	有机成分	无机成分
润瓷	爱尔创	中国	RNC	Bis-GMA、UDMA、TEGDMA	55%~85%,硅酸盐玻璃填料
Shofu Block HC	Shofu	日本	RNC	UDMA、TEGDMA	61%,SiO₂、微气相SiO₂以及ZrSiO₄等填料
Vita Enamic	Vita	德国	PICN	UDMA、TEGDMA	86%,富含氧化铝的精细结构长石陶瓷

材料	是否老化	表面处理
材料	是否老化	NT	SB	HF	Er:YAG
润瓷	否	(215.64±17.36)^Aa	(158.88±8.03)^Ab	(203.23±7.22)^Aa	(158.69±5.36)^Ab
	是	(161.77±13.58)^Ba	(131.69±7.32)^Bb	(159.02±12.49)^Ba	(121.94±9.25)^Bb
Shofu Block HC	否	(160.20±12.53)^Aa	(135.72±17.68)^Aa	(148.22±10.88)^Aa	(92.60±8.98)^Ab
	是	(131.78±7.72)^Ba	(110.21±7.86)^Bb	(127.90±9.98)^Ba	(71.76±12.02)^Bc
Vita Enamic	否	(146.28±12.67)^Aa	(124.53±6.24)^Ab	(142.72±7.37)^Aa	(130.19±12.10)^Ab
	是	(127.07±8.11)^Ba	(122.07±6.58)^Aa	(124.02±8.47)^Ba	(123.88±3.48)^Aa

变量(源)	材料	平方和	自由度	均方	F	P
表面处理	润瓷	36 295.776	3	12 098.592	104.493	<0.001^*
	Shofu Block HC	48 398.852	3	16 132.951	124.848	<0.001^*
	Vita Enamic	2 189.502	3	729.834	9.843	<0.001^*
冷热循环	润瓷	32 810.913	1	32 810.913	283.382	<0.001^*
	Shofu Block HC	11 305.954	1	1 105.954	87.494	<0.001^*
	Vita Enamic	2 724.420	1	2 724.420	36.744	<0.001^*
表面处理×冷热循环	润瓷	1 919.854	3	639.951	5.527	<0.001^*
	Shofu Block HC	225.592	3	75.197	0.582	0.629
	Vita Enamic	1 099.642	3	366.547	4.944	0.004^*
误差	润瓷	8 336.397	72	115.783
	Shofu Block HC	9 303.865	72	129.220
	Vita Enamic	5 338.474	72	74.145

Effects of different surface treatments on flexural strength and morphology of CAD/CAM resin-ceramic composites

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