Abstract: Objective  To investigate the effect of ulnar styloid fracture and its type on distal radius fracture surgery.Methods A total of 92 patients with distal radius fracture were randomly selected in our hospital from January 2020 to December 2021.According to whether the patients were combined with ulnar styloid fracture and the Hauck classification criteria of fracture,they were divided into non-combined group(n=48),type Ⅰ group (n=21) and type Ⅱ group(n=23).The palmar angle,ulnar declination,height recovery of radial styloid,Gartland-Werly score,grip strength and DASH score preoperative,6 months and 1 year after surgery in 3 groups were collected and compared.The complication in 3 groups were compared.Results Before operation,there was no statistically significant difference in the palm angle,ulnar deviation angle,radius styloid process height and joint surface flatness in 3 groups (P>0.05).6 months and 1 year after operation,the palm angle,ulnar deviation angle,radius styloid process height and joint surface flatness in 3 groups were improved (P<0.05).Except for the palm angle and ulnar deviation angle in 3 groups at 6 months after operation,there was no statistically significant difference in the other imaging parameters at 6 months and 1 year after operation(P>0.05).There was no significant difference in the Gartland-Welly score in 3 groups at 6 months and 1 year after operation(P>0.05).Before operation,there was no significant difference in grip strength and DASH score among in 3 groups (P>0.05).6 months and 1 year after operation,the grip strength and DASH score of in 3 groups were improved (P>0.05).No obvious complications occurred in 3 groups.Conclusion Type Ⅱ styloid fracture can affect the postoperative effect of distal radius fracture,while type Ⅰ styloid fracture has little effect on wrist function.

Key words: influencing factors, distal radius fractures, joint function, ulnar styloid fracture, typing