Journal of Prevention and Treatment for Stomatological Diseases ›› 2021, Vol. 29 ›› Issue (3): 151-156.DOI: 10.12016/j.issn.2096-1456.2021.03.002

• Basic Study • Previous Articles     Next Articles

Effects of concentrated sulfuric acid etching durations on the shear bond strength between polyether-ketone-ketone and dentin

WANG Chenwei1(),SUN Fangfang1,YANG Chuncheng2,DING Ling1,CHEN Xi1,ZHANG Jiaqi1,WU Guofeng1()   

  1. 1. Department of Prosthodontics, Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, China
    2. State Key Laboratory for Manufacturing System Engineering, Xi’an Jiaotong University, Xi’an 710054, China
  • Received:2020-07-05 Revised:2020-08-03 Online:2021-03-20 Published:2021-01-12
  • Contact: Guofeng WU
  • Supported by:
    Key Project of National Natural Science Foundation of China(51835010);Key Research and Development (Social Development) Project of Jiangsu Province(BE2019622)

浓硫酸酸蚀聚醚酮酮的时间对其与牙本质剪切粘接强度的影响

王琛玮1(),孙方方1,杨春成2,丁玲1,陈晞1,张嘉琪1,吴国锋1()   

  1. 1.南京大学医学院附属口腔医院 南京市口腔医院修复科,江苏 南京(210008)
    2.西安交通大学机械制造系统工程国家重点实验室,陕西 西安(710054)
  • 通讯作者: 吴国锋
  • 作者简介:王琛玮,住院医师,硕士研究生在读,Emai:1751273982@qq.com
  • 基金资助:
    国家自然科学基金重点项目(51835010);江苏省重点研发计划(社会发展)项目(BE2019622)

Abstract:

Objective To study the effects of different concentrated sulfuric acid etching durations on the shear bond strength between polyether-ketone-ketone (PEKK) and dentin, providing a scientific basis for the clinical bonding procedures of PEKK prosthesis. Methods Forty-four PEKK specimens were prepared and randomly divided into four groups: group A was the control group, which was only polished with abrasive papers, group B, group C and group D were experimental groups, which were etched by 98% concentrated sulfuric acid for 5 s, 30 s and 60 s, respectively. In addition, one sample was randomly selected from each group, and the profile was prepared by a slow cutting machine. The surface morphology of the profile was observed under SEM. After the four groups of specimens and dentin were bonded by resin, they were soaked in distilled water at 37 ℃ for 24 h. After the shear bonding strengths were measured, the fracture interfaces of the specimens were examined by the scanning electron microscopy and stereomicroscopy, and failure models of bonding were analyzed. Results After acid etching treatments, the cross-sectional images in group B presented uniform spongy shapes, while the cross-sectional images in group C and group D showed destructive pore structures. The shear bond strengths of group B (16.84 ± 1.84) MPa, group C (12.33 ± 1.22) MPa and group D (6.44 ± 1.18) MPa were higher than that of group A (3.99 ± 1.06) MPa (P < 0.05). The highest shear bond strength was observed in group B (16.84 ± 1.84) MPa. Conclusion The surface treatment of 98% sulfuric acid etching for 5 s manifested the best bond strength between PEKK and dentin.

Key words: polyether-ketone-ketone, surface treatment, dentin, bonding, primer, RelyXTM Ultimate, shear bond strength, scanning electron microscope

摘要:

目的 研究浓硫酸酸蚀聚醚酮酮(polyether-ketone-ketone,PEKK)不同时间对其与牙本质剪切粘接强度的影响,为临床使用PEKK修复体的粘接操作提供科学依据。方法 制备PEKK试件44个,随机平均分为A、B、C、D 4组:A组为对照组,仅用水磨砂纸打磨;B组、C组、D组为实验组,分别用98%浓硫酸酸蚀经打磨试件表面5 s、30 s、60 s。另外,每组随机抽取1个试件用慢速切割机制备出剖面,在扫描电镜下观察其剖面的表面形貌。4组试件与牙本质通过树脂粘接后在37 ℃蒸馏水浸泡24 h,测量剪切粘接强度后统计分析,通过扫描电子显微镜与体视显微镜检查试件断裂界面,统计粘接失败类型。结果 B组PEKK试件酸蚀处理后剖面呈海绵状且孔隙大小均匀,C组、D组可见试件剖面有破坏状孔蚀样结构;剪切粘接强度B组(16.84 ± 1.84) MPa、C组(12.33 ± 1.22) MPa和D组(6.44 ± 1.18) MPa均大于A组(3.99 ± 1.06) MPa(P<0.05),其中B组与牙本质的剪切粘接强度最高(16.84 ± 1.84) MPa。结论 采用98%浓硫酸酸蚀PEKK表面5 s处理方法可以使PEKK与牙本质获得较好的剪切粘接强度。

关键词: 聚醚酮酮, 表面处理, 牙本质, 粘接, 底涂剂, RelyXTM Ultimate, 剪切粘接强度, 扫描电镜