Contact with adjacent teeth in the same arch is referred to as interproximal contacts.
 The maxillary central incisors are one of only two types of teeth which has an interproximal contact with itself.
 The other type of teeth is the mandibular central incisors.
 In usually preferred and healthy states, the central incisors touch in the incisal third of the teeth.
On the other hand, the contact between the central incisor and the lateral incisor is nearer the gingiva at the location between the incisal and middle thirds of the tooth's crown.
Contact with adjacent teeth in the same arch is referred to as interproximal contacts.  The maxillary central incisors are one of only two types of teeth which has an interproximal contact with itself.  The other type of teeth is the mandibular central incisors.  In usually preferred and healthy states, the central incisors touch in the incisal third of the teeth. On the other hand, the contact between the central incisor and the lateral incisor is nearer the gingiva at the location between the incisal and middle thirds of the tooth's crown.
Maxillary central incisor