Department of Surgery and Oral Implantology Faculty of Medicine and Health Sciences Catholic University of Valencia Calle Quevedo nº2, 46001, Valencia, Spain
Med Oral Patol Oral Cir Bucal. 2021 May 1;26(3):e361-e367. doi: 10.4317/medoral.24231.
Primary stability is an important key determinant of implant osseointegration. We investigated approaches to improve primary implant stability using a new drilling technique termed osseodensification (OD), which was compared with the conventional under-drilling (UD) method utilized for low-density bones.
We placed 55 conical internal connection implants in each group, in 30 low-density sections of pig tibia. The implants were placed using twist drill bits in both groups; groups Under Drilling (UD) and Osseodensification (OD) included bone sections subjected to conventional UD and OD drilling, respectively. Before placing the implants, we randomized the bone sections that were to receive these implants to avoid sample bias. We evaluated various primary stability parameters, such as implant insertion torque and resonance frequency analysis (RFA) measurements.
The results showed that compared with implants placed using the UD technique, those placed using the OD technique were associated with significantly higher primary stability. The mean insertion torque of the implants was 8.87±6.17 Ncm in group 1 (UD) and 21.72±17.14 Ncm in group 2 (OD). The mean RFA was 65.16±7.45 ISQ in group 1 (UD) and 69.75±6.79 ISQ in group 2 (OD).
The implant insertion torque and RFA values were significantly higher in OD group than in UD. Therefore, compared with UD, OD improves primary stability in low-density bones (based on torque and RFA measurements).
初始稳定性是决定种植体骨整合的重要关键因素。我们研究了一种新的钻孔技术——骨强化（OD），以提高初始种植体稳定性的方法，该技术与用于低密度骨的传统浅钻（UD）方法进行了比较。
我们在 30 个猪胫骨低密度节段的每组中放置了 55 个锥形内部连接种植体。两组均使用扭转钻头放置种植体; 下钻组（UD）和骨强化组（OD）分别包括接受常规 UD 和 OD 钻孔的骨节段。在放置种植体之前，我们随机化了接受这些种植体的骨节段，以避免样本偏差。我们评估了各种初始稳定性参数，例如种植体插入扭矩和共振频率分析（RFA）测量。
结果表明，与使用 UD 技术放置的种植体相比，使用 OD 技术放置的种植体具有更高的初始稳定性。组 1（UD）中的种植体插入扭矩平均值为 8.87±6.17 Ncm，组 2（OD）中的种植体插入扭矩平均值为 21.72±17.14 Ncm。组 1（UD）中的平均 RFA 为 65.16±7.45 ISQ，组 2（OD）中的平均 RFA 为 69.75±6.79 ISQ。
OD 组的种植体插入扭矩和 RFA 值明显高于 UD 组。因此，与 UD 相比，OD 可提高低密度骨的初始稳定性（基于扭矩和 RFA 测量）。
