The correlation between medial column support screw number and curative effects of proximal humeral anatomical locking plate on proximal humeral fractures

LIANG Xudong

doi:10.3969/j.issn.1002-7386.2018.07.012

Abstract：Objective To investigate the effects of different medial column support screw numbers (0 ~3) on the therapeutic effects of proximal humeral anatomical locking plate on proximal humeral fractures. Methods A total of 184 patients with proximal humeral fractures who were treated by proximal humeral anatomical locking plate in our hospital from January 2011 to March 2016 were enrolled in the study. According to proximal humeral medial column support screws numbers,these patients were divided into 0 screw support group (n=63),1 screw support group (n=49),2 screws support group (n=41) and 3 screws support group(n=31),then the fracture healing status,humerus head height loss,shoulder joint function,the fracture reduction effects at last follow up and incidence rate of complications were observed and compared among the four groups.Results At last follow-up,the humerus head varus angle in 3 screws,2 screws,1 screw,0 screw support groups was (1.74 ± 0.57)°,(1.96 ± 0.93)°,(3.28 ± 1.14)°,(6.14 ± 2.95)°,respectively, and the humerus head height loss was(1.06 ± 0.84) mm,(2.92 ± 1.41) mm,(5.09 ± 2.25) mm,(6.18 ± 2.47) mm,respectively,and Constant scores were (79.56 ± 7.83),(76.13 ± 8.45),(64.86 ± 7.33),(57.64 ± 6.68), respectively, there were significant differences among the four groups (P<0.01). However there were no significant differences in neck stem angle,fracture healing time, incidence rate of complication in the first detection after operation among the four groups (P >0.05). Conclusion In treatment of proximal humeral fractures by proximal humeral anatomical locking plate, to use 2 or 3 support screws to reconstruct medial column support can obtain satisfactory therapeutic effects.