Faculty of Medicine, Technician-Israel Institute of Technology, Haifa, Israel.
Implant Dent. 2012 Aug;21(4):302-5. doi: 10.1097/ID.0b013e31825cd43b.
To evaluate a novel implant design for immediate implantation. This implant presents a specially designed expanded diameter midcrestal "wing" thread, which is aimed to provide added bone contact for greater insertion torque and primary stability.
Mandibular premolars were extracted in 2 mongrel dogs, and immediate dental implants were inserted into the fresh extraction sockets. Implants were evaluated for stability using a resonance frequency analysis device immediately after insertion and after 4 and 8 weeks. Removal torque of 1 randomly selected implant in each hemimandible was measured as well. At 8 weeks, the remaining 6 implants were processed histologically.
Mean implant stability quotient at implant placement was 64.38 (5.03) and 74.5 (3.08) at 8 weeks. Average removal torque immediately after implant placement was 49.65 (20.3) N.cm and 98.33 (12.34) N.cm at 8 weeks. The mean bone-to-implant contact value at 8 weeks was 38.89% (7.65%).
The examined implant with the expanded diameter midcrestal "wing" thread showed good results of resonance frequency analysis and removal torque during the initial healing phase, and as such, it might be used for immediate implantation and loading.
评估一种新型的即刻植入物设计。该种植体具有独特设计的中基扩径“翼”螺纹，旨在增加与骨的接触面积，从而提供更大的旋入扭矩和初始稳定性。
在 2 只杂种犬中拔除下颌前磨牙，并将即刻牙种植体植入新鲜拔牙窝中。种植体植入后即刻、4 周和 8 周时使用共振频率分析设备评估稳定性。还测量了每半下颌随机选择的 1 个种植体的拔出扭矩。8 周时，对其余 6 个种植体进行组织学处理。
种植体植入时的平均种植体稳定性系数为 64.38（5.03），8 周时为 74.5（3.08）。种植体植入后即刻的平均拔出扭矩为 49.65（20.3）N.cm 和 98.33（12.34）N.cm，8 周时为 98.33（12.34）N.cm。8 周时的平均骨-种植体接触值为 38.89%（7.65%）。
在初始愈合阶段，具有中基扩径“翼”螺纹的研究种植体在共振频率分析和拔出扭矩方面表现出良好的结果，因此可用于即刻植入和加载。
