Evaluation of titanium implants with surface modification by laser beam: biomechanical study in rabbit tibias
Evaluation of titanium implants with surface modification by laser beam: biomechanical study in rabbit tibias
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DOI：
10.1590/s1806-83242009000200008
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发表时间：
2009-06-01
影响因子：
2.5
通讯作者：
Marcantonio Jr., Elcio
中科院分区：
文献类型：
--
作者：
Faeda, Rafael Silveira;Tavares, Hewerson Santos;Marcantonio Jr., Elcio
本研究的目的是通过生物力学测试来评估激光（Nd:YAG）表面修饰种植体与机械表面种植体移除所需的力。24只家兔在胫骨、机械表面（MS）和激光修饰表面（LMS）各进行一种表面处理。在愈合4、8和12周后，用扭矩计测量移除扭矩。根据所研究表面的形貌、化学成分和粗糙度进行分析。各时段的平均去除扭矩，MS为23.28、24.0、33.85 Ncm， LMS为33.0、39.87、54.57 Ncm。各评价期表面间差异有统计学意义（p < 0.05）。表面形貌分析表明，激光处理后的表面形貌较MS深且规则，氧离子含量较MS高。表面形貌分析表明，LMS表面粗糙度（R(a) = 1.38 +/- 0.23微米）与MS表面粗糙度（R(a) = 0.33 +/- 0.06微米）的差异有统计学意义（p < 0.01）。基于这些结果，可以得出结论，与MS种植体相比，LMS种植体的物理化学性质增加了骨与种植体的相互作用。
The purpose of the present study was to evaluate, using a biomechanical test, the force needed to remove implants with surface modification by laser (Nd:YAG) in comparison with implants with machined surfaces. Twenty-four rabbits received one implant with each surface treatment in the tibia, machined surface (MS) and laser-modified surface (LMS). After 4, 8 and 12 weeks of healing, the removal torque was measured by a torque gauge. The surfaces studied were analyzed according to their topography, chemical composition and roughness. The average removal torque in each period was 23.28, 24.0 and 33.85 Ncm for MS, and 33.0, 39.87 and 54.57 Ncm for LMS, respectively. The difference between the surfaces in all periods of evaluation was statistically significant (p < 0.05). Surface characterization showed that a deep and regular topography was provided by the laser conditioning, with a great quantity of oxygen ions when compared to the MS. The surface micro-topography analysis showed a statistical difference (p < 0.01) between the roughness of the LMS (R(a) = 1.38 +/- 0.23 microm) when compared to that of the MS (R(a) = 0.33 +/- 0.06 microm). Based on these results, it was possible to conclude that the LMS implants' physical-chemical properties increased bone-implant interaction when compared to the MS implants.