Abstract Laser biological tissue welding is a potential alternative technology from traditional suturing skills. In this study, we explored the influence laws of laser scanning path on in-vitro skin tissue performance and designed four different scanning paths, including heartbeat, circle, peano20-2, and toothed paths. Then the influence laws of laser scanning paths on temperature distributions, mechanical properties and microstructure characteristics were discussed based on the simple factor design of experiments. The samples under the heartbeat path reached the highest peak temperature and the highest tensile strength, but possessed sparse microstructure. The peak temperature of the samples under the circle path was close to that of the heartbeat samples but the tensile strength was only 8.667 N/cm2. The temperature of the toothed samples was much lower and obviously fluctuated. The toothed samples had very bad mechanical properties, but had uniform microstructure. The Peano20-2 samples achieved the best comprehensive microstructure characteristics and tensile strength was up to 19.939 N/cm2 and suffered no color deepening or scars at the macroscale.

中文翻译：

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扫描路径对激光焊接的影响

摘要 激光生物组织焊接是传统缝合技术的潜在替代技术。在这项研究中，我们探索了激光扫描路径对体外皮肤组织性能的影响规律，并设计了四种不同的扫描路径，包括心跳、圆形、peano20-2 和齿形路径。然后基于实验的简单因素设计，讨论了激光扫描路径对温度分布、力学性能和微观结构特征的影响规律。心跳路径下的样品达到最高峰值温度和最高拉伸强度，但具有稀疏的微观结构。圆形路径下样品的峰值温度与心跳样品的峰值温度接近，但拉伸强度仅为8.667 N/cm2。带齿样品的温度要低得多，而且波动明显。带齿样品具有非常差的机械性能，但具有均匀的微观结构。Peano20-2 样品实现了最佳的综合微观结构特征，拉伸强度高达 19.939 N/cm2，并且在宏观尺度上没有颜色加深或疤痕。