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在临床工作中,多根牙采用常规的口内投照方法拍摄X线片进行检查,在读片时,往往由于颊侧根与舌侧根影像互相重叠,而影响其诊断和治疗。为此我们于1985年起对多根牙的X线投照技术进行研究和改进,克服了以上缺点,满足了临床需要。查阅国内文献尚无这方面的报导,故介绍如下: 一、投照技术:首先按常规方法进行口内X线投照。胶片为口内3×4厘米标准片。在病员位置及其他条件相同的情况下,将X线球管水平角向远中或近中倾斜20度角,然后拍摄第二张或第三张X线片。
In clinical work, many teeth using conventional intraoral mapping method to take X-ray examination, the reading film, often due to the buccal root and lingual root imaging overlap, which affects its diagnosis and treatment. To this end we started in 1985 on the multi-root X-ray projection technology research and improvement, to overcome the above shortcomings, to meet the clinical needs. Access to domestic literature there is no report in this area, it is introduced as follows: First, investment technology: First, according to the conventional method of oral X-ray mapping. Film for the mouth 3 × 4 cm standard film. With the patient position and other conditions the same, tilt the horizontal angle of the X-ray tube 20 degrees toward the middle or near center and then the second or third X-ray.