3차원 전산화 단층촬영을 이용한 상악 정중 과잉치의 진단
THE DIAGNOSIS OF IMPACTED MAXILLARY MESIODENS USING 3-DIMENSIONAL COMPUTED TOMOGRAPHY : A CASE REPORT
홍영우, 김성오, 박기숙, 이종갑,
소속 상세정보
홍영우 ( ) - 연세대학교 치과대학 소아치과학
김성오 ( ) - 연세대학교 치과대학 소아치과학
박기숙 ( ) - 연세대학교 치과대학 소아치과학
이종갑 ( ) - 연세대학교 치과대학 소아치과학
KMID : 0358919980250030549
Abstract
요약
저자는 매복된 상악 정중 과잉치를 주소로 내원한 환아를 3차원 전산화 단층촬영술을 이
용해 매복된 과잉치의 위치를 파악하였으며 다음의 결론을 얻었다.
1. 인접한 영구치에 대한 위해한 영향을 주지 않기 위해 상악 정중 매복 과잉치의 정확한
위치 판별이 요구된다.
2. 3차원 전산화 단층촬영법은 매복 과잉치의 위치판별에 있어서 객관적인 중요한 정보를
제공한다.
#초록#
The prevalence of the supernumerary tooth is 1 ∼4%. It usually occurs in the
permanent dentition. It frequently occurs in the maxillary midpalatal area. The presence
of the supernumerary tooth causes the following problems ; (1) interfering the eruption
of successional tooth, (2) displacing the neighboring teeth, (3) resulting large diastema,
(4) forming cystic change. So the supernumerary tooth should be removed as soon as
possible. To extract the supernumerary tooth, the exact position must be noticed first.
Radiographic techniques that were used in the past are tube shift technique, right
angle technique, sterioradiography, using radiopaque contrast media and conventional
tomography. But these methods include the subjective opinion of the operator. So, a
technique eliminating the operator's opinion and showing the position 3-dimentionally
can be used. 3-dimentional computed tomography equipped with dental softwares can
show the position of the impacted supernumerally tooth in 3-dimentional position. It has
an advantage to eliminate the subjective opinion of the operator. With a fast computer
this techenique is done in a relatively short period of time. The rationale of this
methods is relatively simple. After tacking X-ray and reconstructing the data
3-dimentionally, sequential removal of the soft tissue and hard tissue(bone) CT number
leaves the teeth alone in 3-dimensional position. The image can be seen from anywhere,
so the operator can see the image in front, rear, upper, and lower positions. In both
cases 1 and 2, the position of the impacted supernumerary tooth is viewed by the
3-dimensional computed tomography. And it made the operator easy to figureout the
exact position.
키워드
impaction; mesiodens; computed tomography (CT); 3-dimesion;
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