Coldea Andrea, Stawarczyk Bogna, Meinen John, Lankes Valerie, Swain Michael V, Roos Malgorzata
Department of Prosthetic Dentistry, University Hospital, LMU Munich, Munich, Germany.
School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, Australia.
Clin Oral Investig. 2025 Jan 8;29(1):51. doi: 10.1007/s00784-024-06144-w.
To compare the impact of intaglio surface treatments - airborne particle abrasion and hydrofluoric acid (HF) etching - of feldspar ceramic (FEL) crowns on the fracture load (FL) and to investigate the effects of abutment materials and artificial aging. The aim was to assess whether etching could be replaced by an alternative surface roughening method.
FEL crowns had their intaglio surfaces either abraded (25 µm AlO, 0.1 MPa), etched (HF, 60 s), or untreated and then bonded to CoCrMo- and polymer-abutments. FL was measured for non-aged and aged (1.2 million mastication cycles) specimens. Data were analyzed using, Weibull modulus, two-/one-way ANOVA with Tukey HSD-post-hoc-test, t-tests, and TOST equivalence (p < 0.05).
For crowns bonded to CoCrMo abutments, aging affected the FL and Weibull modulus, but pretreatment methods did not. For initial specimens, airborne abraded and etched crowns were equivalent within a 400N bound, however, for aged specimens, equivalence was inconclusive. For crowns bonded to polymer-abutments, pretreatment and aging influenced the FL. Etching decreased the initial FL by over 420N compared to airborne abraded and untreated specimens. After aging, untreated crowns' FL decreased by 528N, while airborne abraded and etched specimens showed no aging effect.
Airborne particle abrasion of FEL crowns' intaglio surfaces did not negatively impact FL and was comparable to etched crowns. Conclusions regarding pretreatment methods and aging differed between CoCrMo- and polymer-abutments.
Airborne particle abrasion may be an alternative procedure for the intaglio surface treatment of FEL crowns prior bonding.
比较长石质陶瓷（FEL）全冠内表面处理——气载颗粒研磨和氢氟酸（HF）蚀刻——对断裂载荷（FL）的影响，并研究基台材料和人工老化的作用。目的是评估蚀刻是否可以被另一种表面粗糙化方法所取代。
FEL全冠的内表面分别进行研磨（25μm AlO，0.1MPa）、蚀刻（HF，60s）或不处理，然后粘结到钴铬钼合金和聚合物基台上。对未老化和老化（120万次咀嚼循环）的样本测量FL。使用威布尔模量、带有Tukey HSD事后检验的双因素/单因素方差分析、t检验和TOST等效性检验（p<0.05）对数据进行分析。
对于粘结到钴铬钼合金基台上的全冠，老化影响FL和威布尔模量，但预处理方法没有影响。对于初始样本，气载研磨和蚀刻的全冠在400N范围内是等效的，然而，对于老化样本，等效性尚无定论。对于粘结到聚合物基台上的全冠，预处理和老化影响FL。与气载研磨和未处理的样本相比，蚀刻使初始FL降低了420N以上。老化后，未处理全冠的FL降低了528N，而气载研磨和蚀刻的样本没有显示出老化影响。
FEL全冠内表面的气载颗粒研磨对FL没有负面影响，并且与蚀刻全冠相当。关于预处理方法和老化的结论在钴铬钼合金基台和聚合物基台之间有所不同。
气载颗粒研磨可能是FEL全冠粘结前内表面处理的一种替代方法。
