Zhou Li-Hui, Wang Di, Huang Hai-Ying, Zhang Yong-Fang
Department of Stomatology, Zhoupu Hospital Affiliated to Shanghai Medical College of Health. Shanghai 201318, China. E-mail:
Shanghai Kou Qiang Yi Xue. 2019;28(2):133-135.
The effect of clockwise mixing method and clockwise combined eight-shaped mixing method on the accuracy of alginate impression was compared.
From march to April 2018, 40 dental restoration cases in the Department of Stomatology, Zhoupu Hospital, Pudong District, Shanghai were selected. Two nurses and the same doctor treated 40 patients with single crown porcelain restoration. Two sets of models were taken by two kinds of mixing methods, which were divided into experimental group and control group. Clockwise manual mixing method was used in the control group to take the model, while clockwise combined eight-shaped mixing method was used in the experimental group to take the model. SPSS 24.0 software package was used for Mann-Whitney rank sum test.
The same high-grade technician used a magnifying glass to observe the prepared impression, recorded the shoulder print, the sulcus wing and bubble generation, and comprehensively evaluated the impression quality. A comparison was made between the two groups, Z=-4.634, P<0.001, and the difference was statistically significant. Among them, the ratio of excellent quality of the clockwise combined eight-shaped mixing method (77.5%) was significantly higher than that of the clockwise mixing method (10%), and the proportion of level IV unqualification (2.5%) was significantly lower than that of the clockwise mixing method (27.5%).
The quality of impression using clockwise combined eight-shaped mixing method is higher than that of the clockwise method, which improves the success rate of the mold and reduces the discomfort caused by repeated impression. Application of this technique is helpful to the promotion of occult knowledge among nurses.
比较顺时针搅拌法与顺时针联合8字搅拌法对藻酸盐印模准确性的影响。
选取2018年3月至4月上海市浦东新区周浦医院口腔科40例牙齿修复病例。由两名护士和同一名医生对40例患者进行单冠烤瓷修复治疗。采用两种搅拌方法制取两组模型，分为实验组和对照组。对照组采用顺时针手动搅拌法制取模型，实验组采用顺时针联合8字搅拌法制取模型。采用SPSS 24.0软件包进行Mann-Whitney秩和检验。
由同一名高级技师使用放大镜观察制取的印模，记录肩台印记、龈沟翼及气泡产生情况，综合评价印模质量。两组比较，Z=-4.634，P<0.001，差异有统计学意义。其中，顺时针联合8字搅拌法优质率（77.5%）显著高于顺时针搅拌法（10%），Ⅳ级不合格比例（2.5%）显著低于顺时针搅拌法（27.5%）。
顺时针联合8字搅拌法制取的印模质量高于顺时针法，提高了模型成功率，减少了反复印模带来的不适。该技术的应用有助于护士间隐性知识的传播。
