Eazhil R, Swaminathan Siva Vadivel, Gunaseelan Madhan, Kannan G Vijay, Alagesan Chandrapandian
Department of Prosthodontics, Chettinad Dental College and Research Institute, Kelambakkam, Tamil Nadu, India.
Department of Prosthodontics, Ibn Sina National College for Medical Studies, Jeddah, Saudi Arabia.
J Int Soc Prev Community Dent. 2016 Nov-Dec;6(6):590-596. doi: 10.4103/2231-0762.195518.
Dimension of dental implant is an important parameter which has a considerable impact on the biomechanical load transfer characters and its prognosis. Excessive stress in the bone-implant interface may result in the failure of the implant. The aim of this study was to evaluate the impact of implant diameter and length on neighboring tissues around the implant. The results of the study will help in developing a scientific methodology to select appropriate implant diameter and length.
In this study, tapered implants of different diameter and length were numerically analyzed using bone-implant models developed from computed tomography generated images of mandible with osseointegrated implants. The impact of various diameters on stress distribution was examined using implants with a length of 13 mm and diameters of 3.5 mm, 4.3 mm and 5.0 mm. Implants with a diameter of 4.3 mm and lengths of 10 mm, 13 mm, 16 mm was developed to examine the impact of various implant length. All materials were assumed to be linearly elastic and isotropic. Masticatory load was applied in a natural direction, oblique to the occlusal plane. The Statistical Package for the Social Sciences software package was used for statistical analysis.
Maximum von Mises stresses were located around the implant neck. It was demonstrated that there was statistically significant decrease in von Mises stress as the implant diameter increased.
Within the limitations of this study there was statistically significant decrease in von Mises stress as the implant diameter increased.
牙种植体的尺寸是一个重要参数，对生物力学载荷传递特性及其预后有相当大的影响。骨-种植体界面处的过度应力可能导致种植体失败。本研究的目的是评估种植体直径和长度对种植体周围邻近组织的影响。该研究结果将有助于制定一种科学方法来选择合适的种植体直径和长度。
在本研究中，使用从下颌骨计算机断层扫描生成图像并带有骨结合种植体的骨-种植体模型，对不同直径和长度的锥形种植体进行数值分析。使用长度为13mm、直径为3.5mm、4.3mm和5.0mm的种植体，研究不同直径对应力分布的影响。开发直径为4.3mm、长度为10mm、13mm、16mm的种植体，以研究不同种植体长度的影响。所有材料均假定为线弹性和各向同性。咀嚼载荷沿与咬合平面倾斜的自然方向施加。使用社会科学统计软件包进行统计分析。
最大冯·米塞斯应力位于种植体颈部周围。结果表明，随着种植体直径的增加，冯·米塞斯应力在统计学上有显著降低。
在本研究的局限性范围内，随着种植体直径的增加，冯·米塞斯应力在统计学上有显著降低。
