Bonding efficacy of highly translucent zirconia and lithium disilicate glass ceramics after femtosecond laser irradiation.

IF 3.2 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of prosthodontic research Pub Date : 2025-01-06 DOI:10.2186/jpr.JPR_D_24_00134

Kaiqi Xu, Masanao Inokoshi, Kumiko Yoshihara, Masayuki Kakehata, Hidehiko Yashiro, Rena Takahashi, Mao Yamamoto, Shingo Kamijo, Masaomi Ikeda, Shunsuke Minakuchi

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Abstract

Purpose: This study investigated the effects of femtosecond laser (FL) irradiation on the surface roughness and shear bond strength of high-translucency zirconia (6 mol% yttria-partially stabilized zirconia [6Y-PSZ]) and lithium disilicate (Li₂SiO₃) glass ceramics.

Methods: Fully sintered square-shaped specimens of 6Y-PSZ (7 groups; 20 specimens/group) and Li₂SiO₃ (8 groups; 20 specimens/group) were surface-treated via sandblasting (50-μm alumina sand or glass beads) or FL irradiation (20- or 40-μm dot or cross-line patterns) or using Monobond Etch & Prime (Ivoclar Vivadent AG; only for Li₂SiO₃ specimens). The surface roughness (arithmetic average [Sa] and developed interfacial area ratio [Sdr]) and shear bond strength after 24 h and 10,000 thermal cycles were measured and statistically analyzed.

Results: The surface roughness of both ceramics significantly increased after 40-μm cross-line FL irradiation. The Sdr also significantly increased after FL irradiation. The 20- and 40-μm cross-line laser-irradiated 6Y-PSZ samples showed the highest shear bond strength after 24 h and 10,000 thermal cycles, respectively. Li₂SiO₃ glass-ceramic specimens showed the highest shear bond strength after Monobond Etch & Prime treatment for both groups. The 40-μm cross-line laser-irradiated Li₂SiO₃ glass-ceramic specimens exhibited high shear bond strength after thermal cycling.

Conclusions: FL significantly increases the bonding efficacy of 6Y-PSZ and Li₂SiO₃ glass ceramics. Furthermore, Monobond Etch & Prime is effective for the surface treatment of Li₂SiO₃ glass ceramics. Therefore, FL can be used to effectively treat the surfaces of dental restorations in clinical settings, facilitating enhanced adhesion between the restoration and the tooth.

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飞秒激光辐照后高半透明氧化锆和二硅酸锂玻璃陶瓷的键合效果。

目的：研究飞秒激光（FL）辐照对高半透明氧化锆（6mol %钇-部分稳定氧化锆[6Y-PSZ]）和二硅酸锂（Li2SiO3）玻璃陶瓷表面粗糙度和剪切键合强度的影响。方法：6Y-PSZ全烧结方形试样(7组；20只/组)、Li2SiO3(8只/组；20个样品/组)通过喷砂（50 μm氧化铝砂或玻璃珠）或FL辐照（20或40 μm点或交叉图案）或使用Monobond Etch & Prime (Ivoclar Vivadent AG；仅适用于Li2SiO3样品)。测量了24 h和10000次热循环后的表面粗糙度（算术平均值[Sa]和发育界面面积比[Sdr]）和剪切结合强度，并进行了统计分析。结果：经40 μm交叉线FL辐照后，两种陶瓷的表面粗糙度均显著提高。FL辐照后Sdr也显著升高。经20 μm和40 μm交叉线激光辐照的6Y-PSZ样品在24 h和10000次热循环后剪切强度最高。两组Li2SiO3玻璃陶瓷试样在Monobond Etch & Prime处理后的剪切结合强度最高。40 μm交叉线激光辐照的Li2SiO3玻璃陶瓷试样经热循环后具有较高的剪切粘结强度。结论：FL能显著提高6Y-PSZ与Li2SiO3玻璃陶瓷的结合效率。此外，Monobond Etch & Prime对于Li2SiO3玻璃陶瓷的表面处理是有效的。因此，FL在临床上可以有效地处理牙体修复体的表面，促进修复体与牙齿之间的粘连。

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来源期刊

Journal of prosthodontic research DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

6.90

自引率

11.10%

发文量

161

期刊介绍： Journal of Prosthodontic Research is published 4 times annually, in January, April, July, and October, under supervision by the Editorial Board of Japan Prosthodontic Society, which selects all materials submitted for publication. Journal of Prosthodontic Research originated as an official journal of Japan Prosthodontic Society. It has recently developed a long-range plan to become the most prestigious Asian journal of dental research regarding all aspects of oral and occlusal rehabilitation, fixed/removable prosthodontics, oral implantology and applied oral biology and physiology. The Journal will cover all diagnostic and clinical management aspects necessary to reestablish subjective and objective harmonious oral aesthetics and function. The most-targeted topics: 1) Clinical Epidemiology and Prosthodontics 2) Fixed/Removable Prosthodontics 3) Oral Implantology 4) Prosthodontics-Related Biosciences (Regenerative Medicine, Bone Biology, Mechanobiology, Microbiology/Immunology) 5) Oral Physiology and Biomechanics (Masticating and Swallowing Function, Parafunction, e.g., bruxism) 6) Orofacial Pain and Temporomandibular Disorders (TMDs) 7) Adhesive Dentistry / Dental Materials / Aesthetic Dentistry 8) Maxillofacial Prosthodontics and Dysphagia Rehabilitation 9) Digital Dentistry Prosthodontic treatment may become necessary as a result of developmental or acquired disturbances in the orofacial region, of orofacial trauma, or of a variety of dental and oral diseases and orofacial pain conditions. Reviews, Original articles, technical procedure and case reports can be submitted. Letters to the Editor commenting on papers or any aspect of Journal of Prosthodontic Research are welcomed.