상악 구개측 중앙부에 매복된 과잉치
Mesiodens in the vault of the palate
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초록
과잉치는 치배 형성기에 정상 치판의 과도한 증식의 결과로 발생하며 산발적일 수도 있고 유전적일 수도 있다. 발생 빈도는 1-3%이며, 2:1의 비율로 남아에게 호발한다. 주로 상악 전방부에서 많이 발견되며, 매복, 영구치의 위치 이상, 정중부 이개, 낭종, 비강으로의 맹출 등과 같은 다양한 합병증을 나타낼 수도 있다. 상악 전방부에서 발견되어지는 과잉치는 치축방향에 따라 위치가 결정되며 상악 전방부 과잉치의 1/3 정도는 역위 매복되어 맹출의 가능성이 없지만, 치낭의 치관 부위가 정상적인 관계로 존재하는 한 과잉치의 이동이 일어날 수 있다. 치아의 이동은 경구개, 소구치 부위, 비강까지도 일어날 수 있다. 또한 전상악 수직고경의 성장으로 시간이 지남에 따라 외과적 접근이 어려워질 수 있다. 이에 본 두 증례에서는 역위 매복된 상악 전방부의 과잉치가 구개 측 중앙부까지 이동된 것을 발견하여 외과적으로 제거하였다.
Abstract
Supernumerary tooth develops as a result of abnormal proliferation of the dental lamina during the initiation stage of dental development. It could be a sporadic occurrence or a hereditary transmission. Supernumerary tooth occurs with a frequency of 1 to 3%. Generally, there is a 2:1 preference for boys. It is usually found in the anterior portion of the maxilla and may be associated with complications such as impaction, malposition of permanent teeth, formation of diastema, cysts and eruption into nasal cavity. The position of supernumerary tooth found in the anterior portion of the maxilla is determined by the axis of the tooth. One third of supernumerary tooth in the anterior portion of the maxilla has no possibility of eruption due to its invertedly impacted position. However, as long as the coronal part of the follicle remains intact, migration of supernumerary tooth is possible. The migration may occur into the palate, the premolar region, the sinus or the nasal cavity. Also, growth of vertical dimension of maxilla could make surgical approach difficult as time goes by. For this reason, we have found invertedly impacted mesiodens moved to the vault of the palate in the two cases, and extracted supernumerary tooth surgically.
참고문헌 (18)
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