Jimbo R, Tovar N, Marin C, Teixeira H S, Anchieta R B, Silveira L M, Janal M N, Shibli J A, Coelho P G
Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, USA.
Int J Oral Maxillofac Surg. 2014 Jul;43(7):883-8. doi: 10.1016/j.ijom.2014.01.016. Epub 2014 Feb 28.
Information concerning the effects of the implant cutting flute design on initial stability and its influence on osseointegration in vivo is limited. This study evaluated the early effects of implants with a specific cutting flute design placed in the sheep mandible. Forty-eight dental implants with two different macro-geometries (24 with a specific cutting flute design - Blossom group; 24 with a self-tapping design - DT group) were inserted into the mandibular bodies of six sheep; the maximum insertion torque was recorded. Samples were retrieved and processed for histomorphometric analysis after 3 and 6 weeks. The mean insertion torque was lower for Blossom implants (P<0.001). No differences in histomorphometric results were observed between the groups. At 3 weeks, P=0.58 for bone-to-implant contact (BIC) and P=0.52 for bone area fraction occupied (BAFO); at 6 weeks, P=0.55 for BIC and P=0.45 for BAFO. While no histomorphometric differences were observed, ground sections showed different healing patterns between the implants, with better peri-implant bone organization around those with the specific cutting flute design (Blossom group). Implants with the modified cutting flute design had a significantly reduced insertion torque compared to the DT implants with a traditional cutting thread, and resulted in a different healing pattern.
关于种植体切割槽设计对初始稳定性的影响及其在体内对骨结合的影响的信息有限。本研究评估了具有特定切割槽设计的种植体植入绵羊下颌骨后的早期影响。将48颗具有两种不同宏观几何形状的牙种植体（24颗具有特定切割槽设计——Blossom组；24颗具有自攻设计——DT组）植入6只绵羊的下颌体中；记录最大插入扭矩。在3周和6周后取出样本并进行组织形态计量学分析。Blossom种植体的平均插入扭矩较低（P<0.001）。两组之间在组织形态计量学结果上未观察到差异。在3周时，骨与种植体接触（BIC）的P值为0.58，骨面积分数占比（BAFO）的P值为0.52；在6周时，BIC的P值为0.55，BAFO的P值为0.45。虽然未观察到组织形态计量学差异，但磨片显示种植体之间的愈合模式不同，具有特定切割槽设计的种植体（Blossom组）周围的种植体周围骨组织更好。与具有传统切割螺纹的DT种植体相比，具有改良切割槽设计的种植体插入扭矩显著降低，并导致不同的愈合模式。
