The relation of dentist's posture and their stress

牙科治疗导致牙医出现许多不舒服的姿势。然而，目前还不清楚模特的固定位置是否会给牙医带来压力。本研究的特定目的是验证相关牙科医生的体位和压力。对照组(可调组)允许在使用高速旋转切割仪切割牙齿时调整人体模型的位置。试验组(固定)不允许调整人体模型的位置。分别于清晨、实验前和实验后采集尿样。连续2天每天早晨再次采集尿样以建立对照数据基线。测定肌酐、17-羟色胺、17-硫代-S和儿茶酚胺(肾上腺素、去甲肾上腺素)的浓度。计算了17-羟基-S、17-KS-S和儿茶酚胺的肌酸比值。对使用高速旋转切割仪切割牙齿的受试者从两侧和背部角度进行体位测量。对实验前后的尿液和体位进行方差分析比较，结果如下：在某些体位测量角度上，对照组与实验组有显着性差异(p&lt；0.001)，各神经内分泌激素的内生肌酸比值无明显变化(p&lt；0.05)。这说明，人体模型的固定位置可能会导致牙医的姿势不同，但人体模型的固定位置不会给牙医带来压力。

Dental treatment causes dentists to many uncomfortable posture. However it is not clear whether or not, that fixing position of mannequin may cause stress to dentists. The secific aim of this study is to verify the relatdentists' posture and their stress.Twelve subjects were devided into two group. Control group(Adjustable) was allowed to adjust the position of mannequin during cuting teeth with high-speed rotary cutting instrument. Experimental group(Fixed) was not allowed to adjust the position of mannequin. Urine samples were collected at early morning, before experiment and after experiment. Urine samples were again collected each morning for 2 days to establish control data baseline. Concentrations of creatinine, 17-OHCS, 17-KS-S and catecholamine(adrenaline, noradrenaline) were measured. Creatinine ratios of 17-OHCS, 17-KS-S and catecholamine were calculated. Posture of the subjects who cut teeth with high-speed rotary cutting instrument were taken at angles from both side and back. Experimental and control levels were compared and analyzed statistically using ANOVA about urine and posture.The result was as follows.In some measurement angle of posture significant difference was found between control group and experimental group(p<0.001).There was no significant change of creatinine ratio on any of the neuroendocrine hormones (p<0.05). This suggests that fixing position of mannequin may cause difference of posture but fixing position of mannequin may not cause stress to dentists.