Stochastic surface patterns form an important requirement to facilitate digital image correlation and to subsequently quantify material properties of various tissues when loaded and deformed without artefacts arising from material slippage. Depending on the samples’ natural colour, a surface pattern is created by speckling with colour or dye only, or it requires combined surface coating and speckling before to enhance the contrast, to facilitate high-quality data recording for mechanical evaluation. However, it is unclear to date if the colours deployed for coating and speckling do significantly alter the biomechanical properties of soft tissues. The given study investigated the biomechanical properties of 168 human iliotibial tract samples as a model for collagen-rich soft tissues, separated into four groups: untreated, graphite speckling only, water-based coating plus graphite speckling and solvent-based coating plus graphite speckling following a standardized approach of application and data acquisition. The results reveal that elastic modulus, ultimate tensile strength and strain at maximum force of all groups were similar and statistically non-different (p ≥ 0.69). Qualitatively, the speckle patterns revealed increasing contrast differences in the following order: untreated, graphite speckling only, water-based coating plus graphite speckling and solvent-based coating plus graphite speckling. Conclusively, both coating by water- and solvent-based paints, as well as exclusive graphite speckling, did not significantly influence the load-deformation parameters of the here used human iliotibial tract as a model for collagen-rich soft tissues. In consequence, water- and solvent-based coating paints seem equally suitable to coat collagen-rich soft tissues for digital image correlation, resulting in suitable speckle patterns and unbiased data acquisition.

随机表面图案形成了重要的要求，以促进数字图像关联，并随后量化各种组织在加载和变形时的材料特性，而不会因材料滑动而产生伪影。根据样品的自然颜色，仅通过颜色或染料斑点来创建表面图案，或者需要先组合表面涂层和斑点以增强对比度，以促进高质量的数据记录以进行机械评估。然而，迄今为止尚不清楚涂层和斑点所采用的颜色是否会显着改变软组织的生物力学特性。该研究调查了 168 个人类髂胫束样品的生物力学特性，作为富含胶原蛋白的软组织模型，分为四组：未经处理的、仅石墨斑点、水基涂层加石墨斑点和溶剂基涂层加石墨斑点应用程序和数据采集的标准化方法。结果显示，所有组的弹性模量、极限拉伸强度和最大力应变相似且无统计学差异（p ≥ 0.69）。定性地，散斑图案显示对比度差异按以下顺序增加：未经处理、仅石墨散斑、水性涂料加石墨散斑、溶剂型涂料加石墨散斑。总之，水基和溶剂型涂料的涂层以及独特的石墨斑点都没有显着影响这里使用的人类髂胫束作为富含胶原蛋白的软组织模型的负载变形参数。 因此，水基和溶剂型涂料似乎同样适合涂覆富含胶原蛋白的软组织以进行数字图像相关，从而产生合适的散斑图案和公正的数据采集。