A Case of Angle Class III Malocclusion with Congenitally Missing of Mandibular Central Incisors

Abstract

This is a case report of a female patient who was 15 years and 2 months old when first examined and who complained about anterior crowding. The patient had angle class III malocclusion accompanied by congenitally missing mandibular central incisors on both sides, telescopic occlusion at the second molars, and proclination of the maxillary incisors.
The orthodontic treatment involved edgewise appliances, and a Nance holding arch with extraction of the maxillary first premolars (both sides). Treatment involved arranging the lateral incisor as the central incisor, the canine as the lateral incisor, and the first premolar as the canine in the lower dental arch. When aligning the canine as the lateral incisor, it is common to avoid cuspal interference by reforming the cusp of the canine. However, we were eventually able to avoid cuspal interference by performing tooth movement only, and achieved good functioning when guiding the lateral excursive and protrusive mandibular movements without interference.