A Study Of Proprioceptive Derivation Applied To Orthodontic Archwire Bending

Objective:1. This study aims to contrast the effect of different guidances on the dentists’ gesture by using Rapid Upper Limb Assessment.2. Observe and quantize the posture position and fingers during archwire bending.3. Evaluate and compare the efficiency of different guidances applied to archwire bending.Methods:108 dentists without archwire bending training, age 22 to 32, were selected. These 108 experimental subjects were divided into 2 groups. Group A:54 persons directed by Pd theory,20 males and 34 females; Group B:54 persons adopt the customary operation,22 males and 32 females.The 108 experimental subjects directed to the archwire bending by the same teacher. Observe and recored the postures in both groups by the observer. According to the Rapid Upper Limb Assessment (RULA), calculated and compare the mean scores of the two groups.Take the photos of their fingers during archwire bending by the observer and measure the angles of the first and second knuckle, and the second and third knuckle of the left forefinger.After 16h training,108 experimental subjects complete the maxillary and mandibular OPA-K arch,0.016 SS maxillary arch with Omega loop mesial first molar; 0.017*0.025SS maxillary arch with third bending sequence. Evaluate and compare the efficiency of different guidances applied to archwire bending.Result:1. Compare the RULA scores of A、B group, group B is significantly higher than group A (P<0.05),but there are no significant gender differences within them(P> 0.05).2. According to the observation, the fingers of group A has the more consistency than that of group B,but there are no significant gender differences within them(P >0.05).3. The difference of the time was highly significant in group B then group A (P< 0.05).Conclusion:1. The dentists who adopt the habituation position and gesture generally have higher RULA scores, Pd concept applied to archwire bending can decrease the RULA scores.2. The Pd concept applied to archwire bending facilitated to stabilize the posture position and had a positive effect on dentists’ archwire bending.3. The Pd concept applied to archwire bending improved the efficiency of archwire bending.