title: Healing properties of allograft from alendronate-treated animal in lumbar spine interbody cage fusion.
abstract: This study investigated the healing potential of allograft from bisphosphonate-treated animals in anterior lumbar spine interbody fusion. Three levels of anterior lumbar interbody fusion with Brantigan cages were performed in two groups of five landrace pigs. Empty Brantigan cages or cages filled with either autograft or allograft were located randomly at different levels. The allograft materials for the treatment group were taken from the pigs that had been fed with alendronate, 10 mg daily for 3 months. The histological fusion rate was 2/5 in alendronate-treated allograft and 3/5 in non-treated allograft. The mean bone volume was 39% and 37.2% in alendronate-treated or non-treated allograft (NS), respectively. No statistical difference was found between the same grafted cage comparing two groups. The histological fusion rate was 7/10 in all autograft cage levels and 5/10 in combined allograft cage levels. No fusion was found at all in empty cage levels. With the numbers available, no statistically significant difference was found in histological fusion between autograft and allograft applications. There was a significant difference of mean bone volume between autograft (49.2%) and empty cage (27.5%) (P<0.01). In conclusion, this study did not demonstrate different healing properties of alendronate-treated and non-treated allograft for anterior lumbar interbody fusion in pigs.
authors.affiliation: Orthopedic Department E., Spine Section, Orthopedic Research Laboratory, Institute for Experimental Clinical Research, Aarhus University Hospital, Denmark. xueqingyun@hotmail.com
authors.forename: Qingyun
authors.initials: Q
authors.lastname: Xue
authors.forename: Haisheng
authors.initials: H
authors.lastname: Li
authors.forename: Xuenong
authors.initials: X
authors.lastname: Zou
authors.forename: Mathias
authors.initials: M
authors.lastname: Bünger
authors.forename: Niels
authors.initials: N
authors.lastname: Egund
authors.forename: Martin
authors.initials: M
authors.lastname: Lind
authors.forename: Finn Bjarke
authors.initials: FB
authors.lastname: Christensen
authors.forename: Cody
authors.initials: C
authors.lastname: Bünger
mesh_terms: D019386:Alendronate / Q000627:therapeutic use*; D000704:Analysis of Variance; D000818:Animals; D001707:Biopsy, Needle; D016025:Bone Transplantation / Q000295:instrumentation / Q000379:methods*; D004195:Disease Models, Animal; D005260:Female; D007150:Immunohistochemistry; D008159:Lumbar Vertebrae / Q000601:surgery; D011897:Random Allocation; D012680:Sensitivity and Specificity; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods*; D018709:Statistics, Nonparametric; D013552:Swine; D014057:Tomography, X-Ray Computed; D014182:Transplantation, Autologous; D014184:Transplantation, Homologous
chemical_list: D019386:Alendronate