This issue needs to be viewed from the perspective of the support method of fixed denture, because fixed denture needs neighboring teeth as abutments for support, and as abutments there will be natural teeth, that is to say, as abutments there will be the process of grinding teeth. The grinding process will cut the healthy natural teeth, which does cause some damage to the abutment teeth, but if it is done properly, there is no need to worry. Not only for fixed dentures, but also for single crowns, single crowns can be used for many years with the restoration, and the service life of a crown restoration is at least about 10 years. So the service life of fixed denture is also about 10 years, the key is to choose the right indications, good oral hygiene, to avoid periodontitis or crown edge caries.