Abstract The geometrical characteristics of dental implants, such as thread depth and width, facing angle, pitch, and surface roughness, are important to assess their stability and osseointegration after implant surgery. Herein, we demonstrate the potential use of depth-resolved swept-source optical coherence tomography (SS-OCT) to assess the structural quality of widely used dental implants. The implemented SS-OCT system was centered at a wavelength of 1300 nm with a 100 nm full-width at half-maximum. Four dental implants with different structural formations fabricated using either titanium or ceramic were visualized. Qualitative assessments were performed using boundary flattening with an amplitude-profiling algorithm to emphasize and compare the thread depths, surface roughness, and inner structures of the experimental samples. Cross-sectional and volumetric OCT data clearly revealed the depth, width, and pitch of the dental implants, and especially, the quantitative assessment of axial and lateral thread depth unobtainable using conventional inspection methods was successfully conducted. The depth of thread was measured using a depth-directional intensity profile. In conclusion, the high-resolution SS-OCT system could be utilized to improve the quality assurance of dental implant products through multi-plane assessment.

中文翻译：

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使用深度分辨扫描源光学相干断层扫描识别多维螺纹几何形状以评估牙种植体制造

摘要 牙种植体的几何特征，如螺纹深度和宽度、面角、螺距和表面粗糙度，对于评估种植体手术后的稳定性和骨结合非常重要。在此，我们展示了深度分辨扫频源光学相干断层扫描 (SS-OCT) 在评估广泛使用的牙种植体的结构质量方面的潜在用途。实施的 SS-OCT 系统以 1300 nm 的波长为中心，半峰全宽为 100 nm。使用钛或陶瓷制造的具有不同结构形式的四个牙科植入物被可视化。定性评估使用边界平坦化和振幅分析算法来强调和比较实验样品的螺纹深度、表面粗糙度和内部结构。横截面和体积 OCT 数据清楚地揭示了牙种植体的深度、宽度和螺距，特别是成功地进行了使用传统检查方法无法获得的轴向和横向螺纹深度的定量评估。使用深度方向的强度分布测量螺纹的深度。总之，高分辨率SS-OCT系统可用于通过多平面评估提高牙种植体产品的质量保证。