Analysis Of The Influence Factors Of Carpal Anatomical Position On Radius Shortening After Radius Distal Fracture Surgery

Objective:To study the anatomical relationship between radius shortening and adjacent bone tissue,and to make statistical analysis of it,to clarify the risk factors of radius shortening after radius distal fracture surgery,and to provide reference for clinical treatment.Methods:General data and imaging data of patients with distal radius fracture undergoing surgical treatment were collected and screened according to inclusion criteria and exclusion criteria.The sex,age,fracture type,palmar inclination,ulnar inclination,ulnar-wrist distance,ulnar-wrist ratio,radial-wrist distance,radial-wrist ratio,radial-radial ratio,lateral radius-lunar angle,radial-lunar angle,radial-lunar offset distance,wrist height,ulna,radius and carpal related measurement indexes were measured and the length of radius shortening after operation was calculated.The reduction group（<2mm）,mild radius shortening group（>2mm,<4mm）and severe radius shortening group（>4mm）.To analyze the difference of radius shortening degree among different age,sex and fracture type,to study the correlation between each data and radius shortening,and to construct a multiple linear regression model with radius shortening length as dependent variable,and to analyze the effect of each influencing factor.Result:362 cases of distal radius fracture were collected from January 2014 to June2017.After screening,66 cases were included in the study.There were 26 cases（39.4%）in group A,25 cases（37.9%）in group B and 15 cases（22.7%）in group C.Among them,the length of radial shortening varies from gender to gender:the average shortening of radius is 1.72±1.88 mm for males and 3.23±1.74 mm for females.The measurements of radial shortening in different groups were analyzed:ulnar inclination（group A:27.98°±5.35°,group B:24.75°±4.32°,group C:24.39°±5.32°）,ulnar-radial ratio（group A:3.37±1.54,group B:3.88±1.50,group C:19.90±4.75）.There were differences among the patients（P<0.05）.There were no significant differences in age,fracture type,palm inclination,ulnar-wrist distance,ulnar-wrist ratio,radial-wrist distance,radial-wrist ratio,lateral radius-lunar angle,radial-lunar angle and radial-lunar offset distance（P>0.05）.Relevance analysis:Radial shortening and gender after radius distal fracture surgery（correlation coefficient=-0.33,p=0.00）There were significant correlations among ulnar inclination（r=-0.32,p=0.00）,ulnar-radial ratio（r=0.26,p=0.03）,lateral radius-lunar angle（r=-0.24,p=0.04）.The results of multiple linear regression analysis showed that:Y=5.95+0.29×₁-0.40×₂-0.24×₃-0.20×₄,in which Y radius shortening length,₁ulnar-radial ratio,₂ sex,₃ lateral radius-lunar angle,₄ ulnar inclination angle,regression model fitting degree R2=0.36,regression equation regression effect test F=8.470,significance P=0.00,with statistical significance.CONCLUSION:Through statistical analysis of risk factors of radial shortening,it can be concluded that gender,lateral radial-lunar angle,ulnar inclination angle and ulnar-radial ratio are all the factors influencing the occurrence of radial shortening after radius distal fracture surgery.In clinical treatment,all factors should be considered to avoid the occurrence of radial shortening after distal radius fracture.