Objective: To observe the changes of peri-implant tissue around the individualized abutment that was grinded from zirconia provisional crown in one year. Methods: In this research, a prosthodontic-driven virtual implant planning and immediate provisionalization were conducted in computer assisted design software. And computer-aided design/computer-aided manufacturing (CAD/CAM) techniques were used to fabricate the zirconia provisional crown and surgical guide template before surgery. The implant was accurately placed with the surgical guide, and the zirconia provisional crown was immediately delivered after surgery. Three months later, the implant osseointegration was completed, and zirconia provisional crown was prepared intraorally to generate customized zirconia abutment for final prosthesis. The study included 30 patients with single anterior tooth loss, including 18 males and 12 females, aged from 26 to 50 years old, and the mean age was (36.2±6.1) years old. The patients were from the Center of Oral Implantology, The First Affiliated Hospital of Zhejiang University Medical College from January 2017 to February 2018. After cementation of the final prosthesis, the cases were followed up at 6 and 12 months time intervals. Implant survival rate, probing depth, bleeding on probing, marginal bone level loss and papilla index score (PIS) were recorded in every appointment. Results: The survival rate of 30 implants was 100%, and the probing depths were less than 5 mm. The bone resorption at 6 and 12 months follow-up after the final delivery was 0 (0, 0) mm and 0 (-0.2, 0) mm, respectively, and the difference was not statistically significant (P>0.05). The PIS was 3.0 (2.0, 4.0), 3.0 (2.8, 4.0) and 3.0 (3.0, 4.0) on the final delivery, 6 and 12 months after final delivery, respectively. Conclusions: Marginal bone level and bone loss were stable with this new implant clinical protocol at the one-year follow-up.
目的： 观察用氧化锆临时冠磨改回切为个性化修复基台1年内种植体周围软硬组织的变化。 方法： 采用以修复为导向的种植即刻修复方案，计算机辅助设计与辅助制作技术制作氧化锆临时修复体和种植导板，导板引导下植入种植体并即刻安装氧化锆临时修复体。3个月后种植体骨结合完成，口内磨改回切氧化锆临时修复体形成个性化氧化锆种植修复基台，全冠修复方法取模制作永久修复体。纳入2017年1月至2018年2月就诊于浙江大学医学院附属第一医院口腔种植中心的30例上前牙单牙缺失患者，男性18例，女性12例，年龄（36.2±6.1）岁（26~50岁）。患者在戴入最终修复体后即刻、6个月及1年时复查，记录种植体存留率，检查探诊深度和探诊出血指数，根尖X线片测量种植体周围骨水平变化，采用牙龈乳头指数（apilla index score，PIS）评价牙龈乳头充盈度。 结果： 戴入最终修复体后1年30枚种植体的存留率为100%，植体周围探诊深度均小于5 mm。戴入最终修复体后6个月及1年的骨吸收量分别为0 （0，0） mm和0 （-0.2，0） mm，差异无统计学意义（P>0.05）。戴入最终修复体即刻、6个月及1年时PIS分别为3.0 （2.0，4.0）、3.0 （2.8，4.0）和3.0 （3.0，4.0）。 结论： 戴入最终修复体后1年，30枚种植的植体周围骨组织和牙龈组织均较稳定。.
Keywords: Computer aided design; Customized abutment; Dental implantation; Provisional crown; Zirconia.