環口放射線攝影在牙科植體術前對下顎骨齒槽骨高度評估的準確性

Accuracy of Panoramic Radiography in Estimating Mandibular Ridge Height before Height before Dental Implantation

林立德(Li-Deh Lin) ； 陳木熊(Mu-Shiung Chen) ； 潘汝弘(Ju-Hung Pan) ； 陳思光(Ssu-Kuang Chen) ； 藍萬烘(Wan-Hong Lan)

《台灣醫學》 8卷3期 (2004/05) Pp. 339-345

https://doi.org/10.6320/FJM.2004.8(3).06

摘要

To evaluate the accuracy of ridge height estimation of posterior mandible from panoramic radiography before dental implant placement placement. Thirty patients were included in the study. These patients received dental implant treatment at the National Taiwan University Hsopital (NTUH) between March and September of 2000. Panoramic radiography and cross-sectional and sagittal hypocycloidal tomography were performed on each patient with surgical stent in place. With the fixed magnification in the hypocycloidal tomography, the ridge height at the implant sites of posterior mandible can be measured with tomography as a standard to evaluate the magnification of panoramic radiography at the same sites. Accuracy of estimating ridge height, calculated according to the literature on panoramic radiography was also evaluated. The vertical magnification factor of the panoramic radiography range from 23% to 62% (mean: 37.4%, standard deviation:8.8%) which was significantly larger than 26% in tomography. In panoramic radiography, different vertical magnification (28% to 43%) could be observed at similar sites (e.g. #47) of the mandible. The ridge height estimated on the panoramic radiography was larger than the true ridge height. The magnification factor of panoramic radiography varied from case to case. Therefore, clinicians should be very careful in judging the ridge height of mandible from panoramic radiography when accuracy is required during implantation.

關鍵字

植牙 ； 斷層攝影 ； 環口放射線攝線 ； 下顎骨

並列摘要

To evaluate the accuracy of ridge height estimation of posterior mandible from panoramic radiography before dental implant placement placement. Thirty patients were included in the study. These patients received dental implant treatment at the National Taiwan University Hsopital (NTUH) between March and September of 2000. Panoramic radiography and cross-sectional and sagittal hypocycloidal tomography were performed on each patient with surgical stent in place. With the fixed magnification in the hypocycloidal tomography, the ridge height at the implant sites of posterior mandible can be measured with tomography as a standard to evaluate the magnification of panoramic radiography at the same sites. Accuracy of estimating ridge height, calculated according to the literature on panoramic radiography was also evaluated. The vertical magnification factor of the panoramic radiography range from 23% to 62% (mean: 37.4%, standard deviation:8.8%) which was significantly larger than 26% in tomography. In panoramic radiography, different vertical magnification (28% to 43%) could be observed at similar sites (e.g. #47) of the mandible. The ridge height estimated on the panoramic radiography was larger than the true ridge height. The magnification factor of panoramic radiography varied from case to case. Therefore, clinicians should be very careful in judging the ridge height of mandible from panoramic radiography when accuracy is required during implantation.

並列關鍵字

dental implantation ； tomography ； panography ； mandible