口唇部是主要的面部形态区域之一，具有重要的生理功能。嘴唇保护口腔免受外部物质的渗透，维持口腔内部的湿度和温度，帮助咀嚼，同时也是外科美容整形手术中的主要部位之一，且在法医物证研究中唇纹也具有重要的鉴别价值。目前关于口唇部形态的研究主要包括以下几个方面：口唇部形态变异的性别、年龄、族群差异；影响口唇部形态变异的因素，如遗传基因、饮食结构、牙齿及颌骨形态和呼吸方式等；口唇部形态研究在医学、个人身份识别及法医刑侦领域的相关应用等。国内口唇部形态研究相对较少，尤其缺乏较为系统的口唇部形态生长发育及变异研究。本文通过梳理和归纳国内外相关文献的研究数据和结论，对口唇部形态相关研究作简要概述，并对国内口唇部生长发育及形态变异研究作了简要回顾和展望。

The orolabial region is one of the most important anatomical structures of the human face, closely connected to the skin around the oral cavity, and has important physiological functions. The lips protect the oral cavity from the penetration of external substances, and maintain the humidity and temperature inside the oral cavity, and aid to chew. At the same time, the orolabial region is also one of the main parts of cosmetic surgery, and lip wrinkles have an important identification value in forensic physical evidence research. In addition, the orolabial region is one of the main objects of study in the fields of archaeology, anthropology, and medicine. In the field of anthropology, both the skeletal and soft tissue morphology of the orolabial region are important materials for the study of the characteristics of different ethnic groups. In the field of medicine, the study of orolabial morphology can provide a more accurate basis for the treatment of orolabial diseases and the individualization of plastic surgery. With the development of science and technology, research on orolabial morphology in different fields at home and abroad has used a variety of research techniques and methods and involved multiple aspects, forming a diverse range of research results, providing a basis for the establishment of a quantitative database on the orolabial region of the population in the future. Current research on orolabial morphology includes the following aspects: 1) The manifest characteristics of sex differences in orolabial morphological variation, and their association with nasal width; 2) Age differences in morphological variation of the orolabial region, and their age-related sex comparisons; 3) Ethnic differences in morphological variation of the orolabial region; 4) Factors influencing the morphological variation of the orolabial region, including genetics, dietary structure, tooth and jaw morphology, and breathing patterns; 5) Applications related to the study of the morphology of the orolabial region, including medical aspects such as cheilopalatognathus, orthodontics, lip plastic surgery, etc., personal identification through lip prints and lip shapes, and applications in the field of forensic criminal investigation such as reconstruction of the deceased’s appearance. There are relatively few studies on the morphology of the orolabial region in China, especially the lack of more systematic studies on the growth and development of the morphology and variation of the orolabial region. In this paper, we examined the research results on orolabial morphology at home and abroad, sorted out and summarized the research data and conclusions in the related literature, gave a brief overview of the research on orolabial morphology according to certain research directions, and made a brief review and outlook on the research on orolabial growth and development and morphological variation in China.