Condylar hypoplasia is known as underdevelopment of the mandibular condyle. Congenitally (primary) caused condylar hypoplasia leads to underdeveloped condyle at birth.[1]Hypoplasia of mandible can be diagnosed during birth, in comparison to the hyperplasia which is only diagnosed later in growth of an individual.
Acquired condylar hypoplasia happens when a person is not born with a small condyle but they sustain an injury during their growth which leads to this condition. The injury causes stop of growth in the condyle, resulting in a smaller condyle. The type of injuries that can happen are most traumatic in nature. Injury or infection related to ear, childhood rheumatoid arthritis and parathyroid hormone related deficiency are known to cause the injury.[1][5][6]
Presentation
Individuals with condylar hypoplasia may present with small mandible, symmetry in lower jaw and increased overjet. Depending on the presence or absence of the condyle, an individual may have limited opening of the mouth.
Diagnosis
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Treatment
Treatment of this condyle usually requires a multi-team approach involving an oral surgeon, an orthodontist and a plastic surgeon.[5] A treatment usually involves some type of bone graft from one's own body to their low jaw. A costochondral bone graft has been successfully used to add bone to the mandible by oral and plastic surgeons.[7] This type of graft can be lengthened by a procedure known as distraction osteogenesis which adds bone to the already placed graft. The graft is usually placed before the growth spurt occurs in an individual. The graft placement is later followed by an orthognathic surgery after the growth has finished in an individual.
^Ozturk, Sendar; Sengezer, Mustafa; Isik, Selcuk; Gul, Davut (May 2005). "The Correction of Auricular and Mandibular Deformities in Auriculo-Condylar Syndrome". Journal of Craniofacial Surgery. 16 (3): 489–492. doi:10.1097/01.SCS.0000147655.94656.0D. ISSN1049-2275. PMID15915123.
^Santos, K. C. P.; Dutra, M. E. P.; Costa, C.; Lascala, C. A.; Lascala, C. E.; de Oliveira, J. X. (October 2007). "Aplasia of the mandibular condyle". Dento Maxillo Facial Radiology. 36 (7): 420–422. doi:10.1259/dmfr/23852698. ISSN0250-832X. PMID17881603. S2CID8779977.
^Stelnicki, Eric J.; Hollier, Larry; Lee, Catherine; Lin, Wen-Yuan; Grayson, Barry; McCarthy, Joseph G. (March 2002). "Distraction osteogenesis of costochondral bone grafts in the mandible". Plastic and Reconstructive Surgery. 109 (3): 925–933, discussion 934–935. doi:10.1097/00006534-200203000-00017. ISSN0032-1052. PMID11884810. S2CID22551598.