کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6204935 | 1264930 | 2013 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Biomechanical evaluation of the Total Atlanto-odontoid Joint Arthroplasty System: An in vitro human cadaveric study Biomechanical evaluation of the Total Atlanto-odontoid Joint Arthroplasty System: An in vitro human cadaveric study](/preview/png/6204935.png)
BackgroundAtlanto-odontoid joint arthroplasty is a motion restoring procedure suggested as an alternative to rigid fixation after surgical decompression. The purpose of this study was to evaluate the kinematics and pullout strength of a novel Total Atlanto-odontoid Joint Arthroplasty System using human cadaveric specimens.MethodsNondestructive biomechanical tests were performed on 24 fresh craniocervical specimens separated into two groups: 1) the prosthesis implantation group and 2) Harms transoral atlantoaxial plate fixation group. The following configurations were investigated: intact, after decompression, and instrumented. Range of motion and neutral zone were calculated for the C1-C2 segment. In a second experimental series, 8 sets of fresh atlantoaxial specimens were used to test the pullout strength of the atlas-axis components.FindingsCompared with Harms rigid fixation, the Total Atlanto-odontoid Joint Arthroplasty System significantly increased the range of motion and neutral zone in all directions (PÂ <Â .001). In addition, compared with the intact state, the only significant change in the range of motion and neutral zone with the Total Atlanto-odontoid Joint Arthroplasty System implantation was an increase in lateral bending (PÂ <Â .001). The pullout strength created by the anterior C2 transpedicular screw was greater than that of the C2 vertebral screw and C1 lateral mass screw (PÂ <Â .001), and the C1 lateral mass screw was stiffer than the C2 vertebral screw (PÂ =Â .02).InterpretationBiomechanical analyses suggest that the Total Atlanto-odontoid Joint Arthroplasty System was able to provide reliable fixation strength and preserve the normal kinematics of the C1-C2 segment after decompressive procedures.
Journal: Clinical Biomechanics - Volume 28, Issue 4, April 2013, Pages 357-363