中华口腔医学杂志
中華口腔醫學雜誌
중화구강의학잡지
Chinese Journal of Stomatology
2013年
8期
462-466
,共5页
氢氟酸%树脂粘固剂%抗压强度%玻璃陶瓷
氫氟痠%樹脂粘固劑%抗壓彊度%玻璃陶瓷
경불산%수지점고제%항압강도%파리도자
Hydrofluoric acid%Resin cements%Compressive strength%Glass ceramic
目的 探究不同酸蚀时间以及树脂粘接对二硅酸锂玻璃陶瓷弯曲强度的影响,并评价树脂水门汀对玻璃陶瓷表面裂纹的修复能力,以期为临床全瓷冠粘接操作提供参考.方法 采用热压铸造工艺制作二硅酸锂玻璃陶瓷(IPS e.max(R) Press)杆状试件(25.0 mm ×3.0 mm ×2.0 mm)225个.打磨抛光后随机按排列表法将试件随机分为5组,每组45个.试件表面分别进行9.5％氢氟酸凝胶0(对照组)、20、40、60和120 s处理.各组3个试件进行场发射扫描电镜扫描观察.每组40个试件按随机排列表法随机分为两个亚组(每亚组20个),对1个亚组试件酸蚀表面涂布硅烷偶联剂和双固化型树脂水门汀,另一亚组不处理.再分别经37℃水储存24 h和水储存24 h+冷热循环10000次后进行三点弯曲测试.每组剩余2个试件粘接树脂后使用场发射扫描电镜观察粘接界面.对各组试件弯曲强度进行三因素方差分析.结果 氢氟酸酸蚀首先导致玻璃基质溶解消失,随着酸蚀时间的延长,部分晶体结构也因失去基质的支持而脱落消失.玻璃陶瓷表面粗糙度随酸蚀时间的延长而增大.氢氟酸处理0、20、40、60和120 s时试件弯曲强度分别为(384±33)、(347±43)、(330±53)、(327±67)和(317±41) MPa.树脂粘接后,除对照组(0 s)外,其余各组弯曲强度均比粘接前显著增加(P＜0.05),分别为(420±31)、(435±50)、(400±39)和(412 ±58) MPa.结论 长时间的氢氟酸酸蚀可导致二硅酸锂玻璃陶瓷弯曲强度降低,树脂粘接可弥补酸蚀导致的玻璃陶瓷强度损失.
目的 探究不同痠蝕時間以及樹脂粘接對二硅痠鋰玻璃陶瓷彎麯彊度的影響,併評價樹脂水門汀對玻璃陶瓷錶麵裂紋的脩複能力,以期為臨床全瓷冠粘接操作提供參攷.方法 採用熱壓鑄造工藝製作二硅痠鋰玻璃陶瓷(IPS e.max(R) Press)桿狀試件(25.0 mm ×3.0 mm ×2.0 mm)225箇.打磨拋光後隨機按排列錶法將試件隨機分為5組,每組45箇.試件錶麵分彆進行9.5％氫氟痠凝膠0(對照組)、20、40、60和120 s處理.各組3箇試件進行場髮射掃描電鏡掃描觀察.每組40箇試件按隨機排列錶法隨機分為兩箇亞組(每亞組20箇),對1箇亞組試件痠蝕錶麵塗佈硅烷偶聯劑和雙固化型樹脂水門汀,另一亞組不處理.再分彆經37℃水儲存24 h和水儲存24 h+冷熱循環10000次後進行三點彎麯測試.每組剩餘2箇試件粘接樹脂後使用場髮射掃描電鏡觀察粘接界麵.對各組試件彎麯彊度進行三因素方差分析.結果 氫氟痠痠蝕首先導緻玻璃基質溶解消失,隨著痠蝕時間的延長,部分晶體結構也因失去基質的支持而脫落消失.玻璃陶瓷錶麵粗糙度隨痠蝕時間的延長而增大.氫氟痠處理0、20、40、60和120 s時試件彎麯彊度分彆為(384±33)、(347±43)、(330±53)、(327±67)和(317±41) MPa.樹脂粘接後,除對照組(0 s)外,其餘各組彎麯彊度均比粘接前顯著增加(P＜0.05),分彆為(420±31)、(435±50)、(400±39)和(412 ±58) MPa.結論 長時間的氫氟痠痠蝕可導緻二硅痠鋰玻璃陶瓷彎麯彊度降低,樹脂粘接可瀰補痠蝕導緻的玻璃陶瓷彊度損失.
목적 탐구불동산식시간이급수지점접대이규산리파리도자만곡강도적영향,병평개수지수문정대파리도자표면렬문적수복능력,이기위림상전자관점접조작제공삼고.방법 채용열압주조공예제작이규산리파리도자(IPS e.max(R) Press)간상시건(25.0 mm ×3.0 mm ×2.0 mm)225개.타마포광후수궤안배렬표법장시건수궤분위5조,매조45개.시건표면분별진행9.5％경불산응효0(대조조)、20、40、60화120 s처리.각조3개시건진행장발사소묘전경소묘관찰.매조40개시건안수궤배렬표법수궤분위량개아조(매아조20개),대1개아조시건산식표면도포규완우련제화쌍고화형수지수문정,령일아조불처리.재분별경37℃수저존24 h화수저존24 h+랭열순배10000차후진행삼점만곡측시.매조잉여2개시건점접수지후사용장발사소묘전경관찰점접계면.대각조시건만곡강도진행삼인소방차분석.결과 경불산산식수선도치파리기질용해소실,수착산식시간적연장,부분정체결구야인실거기질적지지이탈락소실.파리도자표면조조도수산식시간적연장이증대.경불산처리0、20、40、60화120 s시시건만곡강도분별위(384±33)、(347±43)、(330±53)、(327±67)화(317±41) MPa.수지점접후,제대조조(0 s)외,기여각조만곡강도균비점접전현저증가(P＜0.05),분별위(420±31)、(435±50)、(400±39)화(412 ±58) MPa.결론 장시간적경불산산식가도치이규산리파리도자만곡강도강저,수지점접가미보산식도치적파리도자강도손실.
Objective To analyze the effect of hydrofluoric acid (HFA) etching time and resin bonding on the flexural strength of IPS e.max(R) Press glass ceramic,and evaluate the efficacy of resin cements to seal the cracks of the etched ceramic.Methods Two hundred and twenty-five bars (25.0 mm × 3.0 mm × 2.0 mm) were made from IPS e.max(R) Press ingots using lost-wax,hot-pressed ceramic fabrication technology and randomly divided into five groups,forty-five each.In each group,the surfaces of ceramic bars were etched by 9.5％ HFA gel for 0,20,40,60 and 120 s respectively.Three specimens from each group were selected to observe the microstructure by the field emission scanning electron microscope (FE-SEM).Then each group were randomly subdivided into two subgroups (n =20).One subgroup were coverd with a thin (approximately 0.1 mm) layer of resin cement (Variolink N),whereas the other subgroup remained unaltered.Half of the specimens were stored in 37 ℃ water bath for 24 h and the other half went through thermocycle 10000 times before 3-point bending test to determine their flexural strength.Interfaces between resin cement and etched ceramic were examined with FE-SEM.Results FE-SEM results showed that etching with HFA resulted in preferential dissolution of glass ceramic,and partially supported crystals within the glass matrix were lost with the increasing of etching time.FE-SEM indicated that resin cement sealed the cracks and defects and bonded tightly to etched ceramic surface.The mean flexural strength values of group 0,20,40,60 and 120 s were (384 ± 33),(347 ± 43),(330 ± 53),(327 ± 67),and (317 ±41) MPa respectively.The mean flexural strength of each group except group 0 s increased significantly to (420 ±31),(435 ±50),(400 ±39),and (412 ±58) MPa respectively after the application of resin cement.Conclusions Overtime HFA etching could have a wakening effect on IPS e.max(R) Press glass-ceramic.The application of dual-curing resin cement can compensate the strength loss of the etched glass ceramic.
