Korean J Orthod.  2017 Sep;47(5):323-333. 10.4041/kjod.2017.47.5.323.

Long-term survival of retained deciduous mandibular second molars and maxillary canine incorporated into final occlusion

Affiliations
  • 1Department of Orthodontics, Gangnam Severance Dental Hospital, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea. khkim@yuhs.ac
  • 2Department of Orthodontics, Institute of Craniofacial Deformity, College of Dentistry, Yonsei University, Seoul, Korea.

Abstract

Orthodontic treatment of a complex case that involves retained deciduous mandibular second molars with missing permanent successors is challenging. Usually, congenitally missing teeth are manifested with other dental anomalies that further complicate orthodontic treatment, such as retained deciduous teeth, impactions, transpositions and peg-shaped lateral incisors. Even though the long term prognosis of the retained deciduous tooth is not fully predictable, if the teeth are in good condition, the patient and clinician may incline towards a decision to preserve the deciduous teeth as long as possible. This case report demonstrates that deciduous teeth, in this case the mandibular second molars and maxillary canine, can be incorporated into final occlusion with clinically stable long-term results.

Keyword

Agenesis; Transposition; Tooth impaction; Stability

MeSH Terms

Humans
Incisor
Molar*
Prognosis
Tooth
Tooth, Deciduous
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