Evaluation of the RB-RB/LB-LB mnemonic rule for recording optimally projected intraoral images of dental implants: an in vitro study.
Evaluation of the RB-RB/LB-LB mnemonic rule for recording optimally projected intraoral images of dental implants: an in vitro study.
复制标题
用于记录牙种植体最佳投影口内图像的 RB-RB/LB-LB 助记规则的评估：一项体外研究。
DOI：
10.1259/dmfr/20861598
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
A. Wenzel
中科院分区：
文献类型：
--
作者：
L. Schropp;A. Stavropoulos;R. Spin‐Neto;A. Wenzel
客观化
这项研究的目的是评估一种简单的助记规则(RB-RB/LB-LB规则)，用于记录具有最佳投影的口腔内X线片，以控制牙种植体。
方法
30名牙科三年级学生接受了一堂关于RB-RB/LB-LB型助记规则的简短课程。规则如下：如果右模糊，然后提升光束(RB-RB)，即如果种植体右侧的种植体线模糊，则X射线方向必须朝天花板升高，以在种植体两侧获得清晰的线；如果左模糊，则下光束(LB-LB)，即如果种植体左侧的种植体线模糊，则X射线方向必须向地面降低，以在种植体两侧获得清晰的线。在Frasaco上下颌牙模型(Frasaco GmbH，Tettnang，德国)中记录了四种不同倾斜度的螺纹型种植体的口腔内X线片。学生们没有意识到种植体的倾斜度，并被指示重新暴露每个种植体，执行助记规则，直到获得质量可接受的种植体的图像(由教师主观判断)。随后，根据植入线的锐度对每张X线片进行盲法评估，并将其分为四个质量类别之一：(1)完美、(2)不完美、但临床可接受、(3)不可接受和(4)无希望。
结果
对于所有种植体，从一次暴露到第二次暴露，的得分较高，28%的病例得分相同，8%的病例得分较低。不同倾斜度种植体的暴露仅有微小差异。平均而言，每个植入物需要两次曝光(范围：一到八次曝光)才能获得临床可接受的图像。
结论
RB-RB/LB-LB型助记规则用于记录具有正确投影的种植体的口腔内X线片，经验不足的检查员很容易实施。
OBJECTIVE
The aim of this study was to evaluate a simple mnemonic rule (the RB-RB/LB-LB rule) for recording intra-oral radiographs with optimal projection for the control of dental implants.
METHODS
30 third-year dental students received a short lesson in the RB-RB/LB-LB mnemonic rule. The rule is as follows: if right blur then raise beam (RB-RB), i.e. if implant threads are blurred at the right side of the implant, the X-ray beam direction must be raised towards the ceiling to obtain sharp threads on both implant sides; if left blur then lower beam (LB-LB), i.e. if implant threads are blurred at the left side of the implant, the X-ray beam direction must be lowered towards the floor to obtain sharp threads on both implant sides. Intra-oral radiographs of four screw-type implants placed with different inclination in a Frasaco upper or lower jaw dental model (Frasaco GmbH, Tettnang, Germany) were recorded. The students were unaware of the inclination of the implants and were instructed to re-expose each implant, implementing the mnemonic rule, until an image of the implant with acceptable quality (subjectively judged by the instructor) was obtained. Subsequently, each radiograph was blindly assessed with respect to sharpness of the implant threads and assigned to one of four quality categories: (1) perfect, (2) not perfect, but clinically acceptable, (3) not acceptable and (4) hopeless.
RESULTS
For all implants, from one non-perfect exposure to the following, a higher score was obtained in 64% of the cases, 28% received the same score and 8% obtained a lower score. Only a small variation was observed among exposures of implants with different inclination. On average, two exposures per implant (range: one to eight exposures) were needed to obtain a clinically acceptable image.
CONCLUSION
The RB-RB/LB-LB mnemonic rule for recording intra-oral radiographs of dental implants with a correct projection was easy to implement by inexperienced examiners.