Wu Hsiang-Chun, Huang Heng-Li, Fuh Lih-Jyh, Tsai Ming-Tzu, Hsu Jui-Ting
Int J Oral Maxillofac Implants. 2023 Jan-Feb;38(1):62-70. doi: 10.11607/jomi.9769.
To evaluate the effect of insertion depth, bone type, and implant diameter on the primary stability of short implants. Commercial dental implants with different lengths (6 and 8 mm; BLX, Straumann) were inserted into artificial bone specimens of good and poor quality at three different depth positions: equicrestal, 1-mm subcrestal, and 2-mm subcrestal. Insertion torque values were recorded spontaneously during the implant procedure. Both maximum insertion torque values (MITVs) and final insertion torque values (FITVs) were recorded. Subsequently, Periotest values (PTVs) and implant stability quotients (ISQs) were measured for all specimens. The mean MITVs of all groups ranged from 31.8 to 46.2 Ncm. However, the mean FITVs of all groups ranged from 8.8 to 29 Ncm. Torque values decreased significantly when the implants were inserted into their final positions. When insertion depth was increased, the PTV and ISQ decreased. Long implants and implants inserted into good-quality bone yielded greater primary stability, and bone quality appeared to have a greater effect on primary stability. When 6-mm short implants are inserted in a subcrestal position, low primary stability may be yielded, particularly in poor-quality bone.
评估种植体植入深度、骨类型和种植体直径对短种植体初期稳定性的影响。将不同长度（6毫米和8毫米；BLX，士卓曼）的商用牙科种植体以三种不同深度位置植入质量好和质量差的人工骨标本中：平齐牙槽嵴、牙槽嵴顶下1毫米和牙槽嵴顶下2毫米。在种植体植入过程中自动记录植入扭矩值。记录最大植入扭矩值（MITV）和最终植入扭矩值（FITV）。随后，测量所有标本的Periotest值（PTV）和种植体稳定性商数（ISQ）。所有组的平均MITV范围为31.8至46.2牛厘米。然而，所有组的平均FITV范围为8.8至29牛厘米。当种植体插入其最终位置时，扭矩值显著降低。当植入深度增加时，PTV和ISQ降低。长种植体和植入优质骨中的种植体具有更高的初期稳定性，并且骨质量似乎对初期稳定性有更大影响。当6毫米短种植体植入牙槽嵴顶下位置时，可能产生较低的初期稳定性，尤其是在质量差的骨中。
