Adhesion to high-performance polymers applied in dentistry: A systematic review

ObjectiveThe aim of this systemic review, conducted in accordance with the PRISMA statement, was to investigate the impact of surface pretreatments on the bonding strength of high performance polymers (HPPs).MethodsEight databases were searched through March 2019. Risk of bias was assessed and random effects meta-analyses were applied to analyze mean differences in shear bond strength (SBS) and tensile bond strength (TBS), considering surface pretreatments and bonding agents after 24h and thermocycling.ResultsA total of 235 relevant titles and abstracts were found, yielding 11 final selections. Low risk of bias was observed in most studies. For polyetheretherketone (PEEK) specimens, random-effect models showed that, compared to non-treated controls, pretreatments associated with Visio.link® (Bredent, Senden, GE) increased TBS by 26.72 MPa (95% confidence interval (CI), 19.69–33.76; p < 0.00001) and increased SBS by 4.86 MPa (95% CI, 2.61–7.10; p < 0.00001). Air abrasion improved SBS by 4.90 MPa (95% CI, 3.90–5.90; p < 0.00001) (50 μm alumina) and 4.51 MPa (95% CI, 1.85–7.18; p = 0.0009) (silica-coated CoJet). In comparison to non-treated controls, Visio.link® and Signum PEEK Bond® (Heraeus Kulzer, Hanau, GE) increased SBS by 33.76 MPa (95% CI, 18.72–48.81; p < 0.00001) and 33.28 MPa (95% CI, 17.48–49.07; p < 0.00001), respectively. No differences were found between Visio.link® and Signum PEEK Bond® or Monobond Plus/Heliobond® (Ivoclar Vivadent, Schaan, LH) (p > 0.05). Similar results were observed for polyetherketoneketone (PEKK) specimens.SignificanceThis review shows improved HPP bonding following the application of various surface pretreatments, including air abrasion and bonding agents.     

聚醚酮酮数字化乳牙早失间隙保持器的临床应用观察

目的探讨聚醚酮酮（PEKK）数字化乳牙早失间隙保持器的临床应用效果。 方法从2019年4—5月在南京大学医学院附属口腔医院儿童口腔科就诊的6~10岁儿童中选取下颌单侧乳磨牙早失患者共5例,其中男2例、女3例,经数字化口内光学印模制取,间隙保持器数字化设计,PEKK基材间隙保持器的数字化制作,口内试戴调整,粘接。 结果5例患儿的数字化乳牙早失间隙保持器重量只有传统金属带环丝圈保持器的25%,设计和制作时间只需1 h,5例数字化间隙保持器口内观察与基牙吻合度高。 结论数字化乳牙早失间隙保持器采用数字化口内印模法比传统藻酸盐印模法提高了患儿的舒适度,可当日设计完成并佩戴,并使用PEKK材料,实现了间隙保持器去金属化,无金属过敏等风险,兼顾了美观的效果,具有较好的临床应用前景。