하악과두 잘림과 경추의 하악지 겹침을 야기하는 파노라마방사선촬영 오류
Experimental panoramic positioning errors for inducing condylar cutoff and superimposition of cervical vertebrae on the mandibular ramus
강병철, 김민종, 박혜선, 황슬애, 윤숙자, 이재서,
소속 상세정보
강병철 ( Kang Byung-Chul ) - 전남대학교 치의학전문대학원 영상치의학교실
김민종 ( Kim Min-Jong ) - 전남대학교 치의학전문대학원 치의학과
박혜선 ( Park Hye-Sun ) - 전남대학교 치의학전문대학원 치의학과
황슬애 ( Hwang Sel-Ae ) - 전남대학교 치의학전문대학원 치의학과
윤숙자 ( Yoon Suk-Ja ) - 전남대학교 치의학전문대학원 영상치의학교실
이재서 ( Lee Jae-Seo ) - 전남대학교 치의학전문대학원 영상치의학교실
KMID : 0362720180560030134
Abstract
Purpose: To measure the head tilting angle creating initial condylar cut-off and to find the head position inducing the superimposition of the cervical vertebrae over the mandibular ramus on panoramic radiograph.
Materials and Methods: The panoramic radiographs were taken with Didactic skull on cervical spine model (Scientific GmbH, Hamburg, Germany) using Kodak 8000c Digital Panoramic radiography. For the inherent radiolucency of the plastic skull model, radiopaque 1 mm diameter lead wires were attached along the margin of the mandibular condyle, ramus, mandibular body, cervical vertebrae, and FH plane of the skull model. For measuring the head tilting angle creating the condylar head cutoff, panoramic radiographs were taken by tilting the FH plane downward in 5 degree increments. For finding the distance between transverse process of the third cervical vertebra and gonion inducing superimposition of cervical vertebrae on the mandibular ramus, panoramic radiographs were taken by decreasing the distance in 0.5 cm increments.
Result and Conclusion: The condylar cutoff began to appear when the head of skull model was tilted downward by 15o. As the head tilting angle increasing, the condylar cutoff became more prominent. The superimposition of cervical vertebrae over the mandibular ramus began to appear when the distance between the gonion and third cervical vertebra was 1.0 cm. As the distance decreasing, the superimpostion became more prominent.
키워드
Mandibular Condyle; Panoramic Radiography; Vertebra
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