ICP in dentistry refers to cuspal interlocking position. 1. Cuspal interlocking position refers to the positional relationship between the upper and lower jaws during cuspal interlocking occlusion, a position in which the upper and lower jaw teeth are in the widest and closest contact. It is also the starting and ending position of many movements of the lower jaw. It is the standard for evaluating the occlusal relationship after dental treatment or denture restoration. 2. There is no occlusal interference when the cusps are in staggered position, and chewing food is more efficient. If the apical staggered position cannot be achieved after dental filling or prosthetic restoration, it means that there are individual occlusal high points, which must be adjusted in time to avoid occlusal trauma. Therefore, ICP in dentistry refers to the cuspal interlocking position where the maxillary and mandibular teeth are in the most extensive contact.