ISSN : 0376-4672
치과 교정 치료의 진단이나 두개 악안면 성장의 연구에 있어서 지난 수십 년 동안 우리는 2차원의(2D)측모 두부 방사선 사진이나 파노라마 방사선사진에 의존하여 왔다. 2D 측모 두부 방사선 사진은 교정 치료전후의 기록을 위해서 유용하게 사용되어 지고 있으나, Hatcher가 지적 하였듯이, 2D 측모 두부 방사선사진은 환자 머리 위치나 X-ray 기계의 정렬에 따른orientation error와 투사 거리에 따라 달리 확대가이루어지는 geometric error와 동일한 구조물을 다른 각도에서 찍혀진 방사선 사진에서 식별하는데 어려움이 있는 association error 등의 단점을 지니고있다1). 또한, 2D 측모 두부 방사선 사진은 3차원의(3D) 구조로 존재하는 두개 악안면 구조를 평가하는데 있어서도 한계가 존재해 왔다. 근래에는 다행히도cone-beam computed tomography(CBCT)의출현과 컴퓨터 software의 발달으로 교정과 의사들이 과거에 비해 보다 정확하게 3D로 두개 악안면 구조를 진단하고 연구하는 것이 가능해졌다.
The introduction of cone-beam computed tomography(CBCT) and computer software in orthodontics has allowed orthodontiststo provide more accurate diagnosis and treatment. The most common use of CBCT imaging allows orthodontists to visualize theprecise position of supernumerary or impacted teeth, especially impacted canines. In doing so, the exact angulation of impactionand proximity of adjacent roots can be evaluated by orthodontists, allowing them to choose vector forces for tooth movementwhile minimizing root resorption. Even though 2-dimensional panoramic images can be used to view the position of the impactedcanines, they have limitations because it is not possible to evaluate the impacted tooth position 3-dimensionally. An accurateknowledge of root position improves the determination of success in orthodontic treatment. Nowadays, considering the fast pace of technological development, a combination of intraoral scanning, digital setups, custommadebrackets and wires, and indirect bonding may soon become the orthodontic standard. In this paper, this will be discussedalong with the digital models.
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