| [Objective]To evaluate the outcomes of osteoporotic vertebral compression fractures treated with Kyphoplasty and to analyze the risk factors of the new fractures after procedure retrospectiveiy.[Methods]This study included 82 patients of osteoporotic vertebral compression fracture treated with kyphoplasty in our department were analyzed between 2006 and 2009. All were integrity data. Two groups were defined based on the number of treated vertebral level: single- vertebral group 52 cases(N=1) and multi-vertebral group 30 cases(N≥2).Basic demography was recorded. The pain score was measured by Visual Analogue Scale(VAS), functional outcomes were assessed with modified Oswsetry Disability Indexes(ODI). Measurments of the anterior vertebral height, middle vertebral height of the collapsed vertebral level and posterior vertebral height of the closest unfractured vertebra caudal to the treated level were obtained from standard lateral radiographs before and after surgery . Local Kyphosis Angle (LKA)was also measured. Variance data from pre- and post- operation, and final follow ups were analysed by t test.[Results]VAS scores were dropped from 8.6±0.9 to 1.5±0.8(p<0.01)after KP in the single-vertebral group and from 8.7±0.9 to 1.5±1.0(p<0.01)in the multi-vertebral group.Pain relief was significant. Modified Oswsetry Disability Indexes(ODI) scores were deceased from 38±7 to 16±12 (p<0.01)after procedure in the single-vertebral group. in the multi-vertebral group Modified Oswsetry Disability Indexes(ODI) scores were deceased from 35±7 to 15±6(p<0.01).There were statistic difference in the both groups.Anterior vertebral height and middle vertebral height of the collapsed vertebral level were restored from 60.3%±23.8% to 81.5%±17.9%,from 62.0%±12.5% to 79.8%±7.1%( p<0.05) respectively by KP in the single-vertebral group and from 61.5%±13.9% to 79.3%±10.6%,from 68.0%±15.3% to 82.3%±9.4% ( p<0.05) respectively by KP in the multi-vertebral group. Local kyphosis angle was corrected from 16.7°±6.9°to 8.7°±7.5°in the single-vertebral group and from 18.3°±11.9°to 9.1°±7.2°( p<0.05) in the multi-vertebral group.Detective difference was found in the both groups.4 cases were found refracture in the treated level and 6 cases were identified new fracture in the single-vertebral group.None was found refracture in the treated level ,2 cases were detected new fracture in the multi-vertebral group.comparison fracture group with non- fracture group.Those old age's patients with single level vertebral fracture achieved more height from KP, which increased the risk of subsequent fracture in cemented vertebrae. New fracture occurred in elderly patients and the greater local kyphosis angle indicated the high risk of the untreated vertebral fracture.[conclusions]Kyphoplasty can relieve the pain , improve the funcation,restore the vertebral height.It also can correct the deformity of vertebral fractures and spinal sagittal sequence. Old age is one of the reasons of refracture after KP. New fracture easily occurred in patients suffered from injury ,and whose local kyphosis angle is greater . When KP treated single vertebral fracture, more vertebral height restoration inclined to re- fracture again. |
PDF Full Text Request