구치부 반대교합의 조기치료에 대한 치험례 = EARLY TREATMENT OF THE POSTERIOR CROSS-BITE : A CASE REPORT

국문 초록 (Abstract)

구치부 반대교합은 유치열기와 혼합치열기에서 종종 나타나는 부정교합으로서，유병율은 7∼23%로 다양하게 나타난다. 이는 상악 치아의 협측 교두가 대합되는 하악 치아의 협측 교두의 설측에 교합하는 상태이며，하나의 치아 또는 한 치아군에서 나타날 수 있다.
구치부 반대교합의 경우， 보통 자발적 교정이 이루어지지 않으므로， 발견되는 즉시 치료해주는 것이 추천된다. 치성이나 기능성의 경우 성장함에 따라 골격성으로 이행하여 악골의 변형을 초래하고 교정적인 수단으로 개선이 불가능한 상태로 악화될 가능성도 있으므로 조기에 치료하는 것이 효과적이며，이러한 반대교합의 치료 방법으로는 하악의 변위를 유발하는 조기접촉을 제거하기 위한 교합조정，협소한 상악궁의 확장，치열궁내 비대칭을 치료하기 위한 개개 치아의 배열 등의 방법이 있다.
본 증례에서는 유치열기와 초기 혼합치열기 아동에서 구치부 반대교합이 관찰되어 치아의 선택적 삭제와 상악궁의 확장으로 반대교합을 교정한 후 정기적 검진시 양호한 결과가 관찰되기에 이를 보고하는 바이다.

다국어 초록 (Multilingual Abstract)

Posterior cross-bite is a relatively frequent malocclusion in primary and early mixed dentition and the reported prevalence of posterior cross-bite varies from 7% to 23%. It has been defined as a transverse discrepancy in arch relationship which the palatal cusp of the upper posterior teeth do not occlude in the central fossa of the opposing lower teeth, and can be manifested in a single tooth or in a group of teeth.
Posterior cross-bite does not often self-correct and therefore immediate treatment is recommended. Occlusal adjustment to eliminate premature contact that causes mandibular deviation, expansion of narrow maxillary arch, arrangement of the individual teeth to treat asymmetry within the dental arch are the methods of treating cross-bite.
In the present case, functional posterior cross-bite was observed in the primary and the early mixed dentition children. The children were treated by the slow maxillary expansion and occlusal adjustment. The outcome of periodic examinations after the correction of cross-bite was favorable.

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