The correct term for incisors is incisors, and incisors without crowns may lead to displacement of neighboring teeth and maxillary teeth, early contact and joint interference, as well as affecting aesthetics, as follows. 1. Displacement of neighboring and maxillary teeth: incisors without crowns will have a gap, which may lead to tilting of neighboring teeth to the side of the gap, as well as elongation of the maxillary teeth, causing symptoms such as food impaction. 2. Early contact and jaw interference: Because of the displacement of neighboring teeth and maxillary teeth, the occlusal relationship changes, early contact and jaw interference can occur, resulting in occlusal trauma, and in severe cases, it can cause temporomandibular joint disorders. 3. Affecting aesthetics: incisors are located at the front of the teeth, and not wearing crowns can affect the aesthetics, thus affecting mental health. If the above symptoms occur, it is recommended to go to the hospital in time for early targeted treatment.