[Advances in application of tissue clearing technique in hard tissues].

Tissue clearing is a novel technique developed within recent years, which could make the tissue optical transparency using physical or chemical methods by refractive index matching. Combined with fluorescence imaging and three-dimensional reconstruction technology, it could achieve three-dimensional observing and analyze the tissue structure at the cellular resolution. The tissue clearing technique is mainly applied to soft tissues, as less to hard tissues. In recent years, many researchers have modified tissue clearing methods and made them suitable for hard tissues, such as bone and teeth. The present paper reviews the recent application of tissue clearing techniques in hard tissues.组织透明化技术是一项新兴技术，其原理是使用物理或化学的方法，通过匹配折射率使组织达到光学透明。组织透明化技术结合荧光成像及三维重建技术，可在细胞水平对组织的内容物和结构进行三维观察及分析。组织透明化技术多运用于软组织，对硬组织的研究相对较少。近年，很多学者改进了透明化技术，使之适用于骨和牙齿等硬组织。本文将对组织透明化技术在硬组织中的应用进展作一综述。.