Abdul Razak A A, Abdul Razak I
Dent J Malays. 1985 Jan;8(1):27-32.
This study was undertaken to investigate and assess two radiographic techniques for measuring tooth length. The result of this study demonstrated the inadequacy of determining tooth lengths using radiographs alone without the introduction of instruments into the canal as close as possible to the root apex. Neither of the techniques proved ideal, however, the Paralleling Extension Tube Technique seemed relatively more accurate and reliable than the Bisecting-Angle Technique.
本研究旨在调查和评估两种测量牙长的影像学技术。该研究结果表明，在未将器械尽可能靠近根尖插入根管的情况下，仅使用X光片确定牙长是不够的。然而，这两种技术都不理想，不过，平行延伸管技术似乎比平分角技术相对更准确、更可靠。
