不同角度数字化 X 线摄影在下颌磨牙检查中的应用

目的：探讨不同角度数字化X线摄影在下颌磨牙检查中的应用价值。方法：回顾性分析386例患者433张下颌磨牙DR影像，摄取时X线管分别倾斜5°、6°、7°、8°、9°、10°。根据X线管倾斜角度不同分为6组，并根据影像的清晰度、牙根长度和重叠情况，将影像质量诊断标准分为A、B、C三个等级，比较其影像质量。结果：386例患者433张下磨牙DR影像中，A级232张，B级174张，C级27张。其中5°组与6°组，6°组与8°、9°、10°组，7°组与8°、9°、10°组比较差异均具有统计学意义（P〈0.05）。结论：使用倾斜6°-7°角进行下颌磨牙摄影，较其他角度方法获得更好的DR图像质量。X线管倾斜角度越大，斜射效应越严重，X线倾斜角度不易超过10°。数字化X线摄影提高了下颌磨牙疾病的诊断、治疗水平。

Different Point of View Digital X-ray Photography in the Mandibular Molars Check

Objective：To explore the different point of view digital X-ray photography in mandibular molars check. Method：433 mandibular molars DR images of 386 patients were retrospectively analyzed,their intake of X-ray tube respectively tilt 5°,6°,7°,8°,9°,10°,according to the X-ray tube tilt angles were divided into 6 groups,and according to the image clarity,root length and overlap,the diagnosis standard of image quality were divided into A,B,C three levels,compared the image quality. Result：In 386 patients 433 piece mandibular molar DR image,A 232,B 174,C 27. 5° group with 6°,6° groups with 8°,9°,10° group,7° groups with 8°,9°,10° group comparative difference had statistically significant（P〈0.05）. Conclusion：The use of tilt for 6°-7° angle mandibular molars photography,compare to other angle method obtain better quality of DR image. X-ray tube tilt angle is bigger,oblique effect is more serious,X tilt angle not exceeding 10°. Digital radiography improve mandibular molar disease diagnosis and treatment.