Research progress on femtosecond laser processing technology for high-performance implants
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摘要: 钛和钛合金是口腔种植体的主流基体材料,但其固有的表面生物活性不足,常导致骨整合周期延长和成功率受限。飞秒激光加工作为一种非热的高精度表面加工或改性技术,可通过在种植体表面构建微纳结构,有效调控其生物学性能。本文综述近五年来飞秒激光改善种植体表面生物活性的研究进展。首先,阐述通过调控激光功率、中心波长、扫描策略等单一参数构筑特定表面形貌的方法;其次,介绍了飞秒激光与羟基磷灰石沉积、喷砂处理、增材制造等技术相结合的复合加工策略及其协同增强效应;然后,通过与喷砂酸蚀、电化学沉积、等离子溅射等传统表面处理技术的对比,分析飞秒激光在加工精度、热影响区控制、生物相容性及长期稳定性等方面的独特优势;最后,总结该技术当前面临的挑战(如:设备成本、加工效率等),并对未来在个性化种植体制造、多功能表面构建以及与其他先进技术融合等方面的发展方向进行展望。Abstract: Titanium and its alloys are the predominant base materials for oral implants. However, challenges such as prolonged osseointegration periods and limited success rates persist due to their inherent low surface bioactivity. Femtosecond laser processing has emerged as an innovative, non-thermal, and high-precision surface modification technique, offering a novel approach to precisely tailor the micro-nano topography, chemical composition, and biological performance of implant surfaces. This review summarizes research advances in femtosecond laser surface treatment of titanium implants over the past five years. It systematically elaborates on methods for constructing specific surface architectures by regulating parameters such as laser power, wavelength, scanning strategies, and pulse patterns. Furthermore, it introduces hybrid processing strategies that combine femtosecond laser with techniques like hydroxyapatite deposition, sandblasting, and 3D printing, highlighting their synergistic effects. By comparing femtosecond laser processing with conventional surface treatment technologies (e.g., sandblasting and acid etching, electrochemical deposition, plasma sputtering), this paper analyzes its unique advantages in terms of processing precision, heat-affected zone, biocompatibility, and long-term stability. Finally, current challenges (e.g., equipment cost, processing efficiency) are summarized, and future development directions are proposed, including personalized implant manufacturing, multifunctional surface construction, and integration with other advanced technologies.
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Key words:
- titanium /
- titanium alloy /
- implant /
- femtosecond laser /
- micro-nano structure /
- osseointegration
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表 1 飞秒激光加工技术与其他技术对比
Table 1. Comparison of femtosecond laser processing technology with other technologies
comparison dimension femtosecond laser sandblasting and acid etching alkali heat treatment electrochemical deposition plasma sputtering nanosecond/picosecond laser surface structure micro-nano hierarchical
structuremicron-scale roughness no obvious microscopic roughness dense coating micron-scale roughness micron-scale roughness heat-affected zone almost none none relatively large relatively small relatively small relatively large impurity introduction not easy to
introducemay introduce may introduce may introduce ions may introduce target impurities not easy to
introduceadaptability to complex shapes excellent poor poor poor requires multi-station adjustment general stability excellent good poor poor good general biocompatibility characteristics micro-nano structure promotes osseointegration micron roughness increases bonding area hydroxylation promotes ha deposition functional coating with strong targeting corrosion
resistancesimilar to femtosecond but weaker -
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