Abstract: With the improvement of people's living standards and the rapid development of the oral implant industry,the method of implant is gradually being taken into consideration for patients with dentition defects and missing dentition. In recent years, advances in the design and development of implants,especially platform switching (PLS),have promoted the development of clinical techniques. The biological benefits and clinical effects have been confirmed by many research reports. This technology was first proposed in 2005 and there are a large number of clinical studies confirming that PLS technology can reduce the absorption of marginal bone tissue around the implant. This article reviews the biological width of PLS technology,the micro-gap of implant abutment, and the distribution of stress. However, the problems found in the study of immediate weight-bearing and animal studies still need to be studied through long-term, randomized, prospective and multicenter trials on a large number of implants.

Key words: 　Implant platform switching, Alveolar bone loss, Biological width, Microgap, Stress distribution