Abhay Simone Shah, Ganapathy Dhanraj, Veeraiyan Deepak Nallaswamy, Ariga Padma, Heboyan Artak, Amornvit Pokpong, Rokaya Dinesh, Srimaneepong Viritpon
Department of Prosthodontics, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Chennai 600077, India.
Department of Prosthodontics, Faculty of Stomatology, Yerevan State Medical University after Mkhitar Heratsi, Str. Koryun 2, Yerevan 0025, Armenia.
Polymers (Basel). 2021 Oct 30;13(21):3761. doi: 10.3390/polym13213761.
Recently, polyetheretherketone (PEEK) has been introduced to the dental market as a high-performance and chemically inert biomaterial. This study aimed to compare the wear resistance, abrasiveness, color stability, and displacement resistance of zirconia and PEEK milled crowns. An ideal tooth preparation of a first maxillary molar was done and scanned by an intraoral scanner to make a digital model. Then, the prosthetic crown was digitally designed on the CAD software, and the STL file was milled in zirconia (CaroZiir S, Carol Zircolite Pvt. Ltd., Gujarat, India) and PEEK (BioHpp, Bredent GmbH, Senden, Germany) crowns using five-axis CNC milling machines. The wear resistance, color stability, and displacement resistance of the milled monolithic zirconia with unfilled PEEK crowns using a chewing simulator with thermocyclic aging (120,000 cycles) were compared. The antagonist wear, material wear, color stability, and displacement were evaluated and compared among the groups using the Wilcoxon-Mann-Whitney U-test. Zirconia was shown to be three times more abrasive than PEEK ( value < 0.05). Zirconia had twice the wear resistance of PEEK ( value < 0.05). Zirconia was more color stable than PEEK ( value < 0.05). PEEK had more displacement resistance than zirconia ( value < 0.05). PEEK offers minimal abrasion, better stress modulation through plastic deformation, and good color stability, which make it a promising alternative to zirconia crown.
最近，聚醚醚酮（PEEK）作为一种高性能且化学惰性的生物材料被引入牙科市场。本研究旨在比较氧化锆和PEEK铣削冠的耐磨性、磨蚀性、颜色稳定性和抗位移性。对上颌第一磨牙进行理想的牙体预备，并用口内扫描仪进行扫描以制作数字模型。然后，在CAD软件上对修复冠进行数字化设计，并使用五轴CNC铣床铣削出氧化锆（CaroZiir S，Carol Zircolite Pvt. Ltd.，古吉拉特邦，印度）和PEEK（BioHpp，Bredent GmbH，森登，德国）冠的STL文件。使用带有热循环老化（120,000次循环）的咀嚼模拟器比较了未填充PEEK冠的整体式氧化锆铣削冠的耐磨性、颜色稳定性和抗位移性。使用Wilcoxon-Mann-Whitney U检验评估并比较了各组之间的对抗性磨损、材料磨损、颜色稳定性和位移情况。结果显示氧化锆的磨蚀性是PEEK的三倍（P值<0.05）。氧化锆的耐磨性是PEEK的两倍（P值<0.05）。氧化锆比PEEK颜色更稳定（P值<0.05）。PEEK比氧化锆具有更强的抗位移性（P值<0.05）。PEEK磨损极小，通过塑性变形具有更好的应力调节能力，并且颜色稳定性良好，这使其成为氧化锆冠的一个有前景的替代选择。
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