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Biomechanical study of the atlantoaxial joint after artificial atlanto-odontoid joint arthroplasty.
MedLine Citation:
PMID:  23186920     Owner:  NLM     Status:  In-Data-Review    
Objective: To investigate the stability and three-dimensional movements of the atlantoaxial joint after artificial atlanto-odontoid joint (AAOJ) arthroplasty by comparing with a conventional method.Methods: After anterior decompression, 24 human cadaveric spinal specimens of C0-C3 were randomly divided into two groups: Group A receiving artificial AAOJ arthroplasty; Group B experiencing anterior transarticular screw (ATAS) fixation. Two groups underwent flexibility test in intact and instrumented states. Rotational angle of the C0-C3 segments was measured to study the immediate stability and function of anterior decompression with AAOJ arthroplasty compared with the intact state and ATAS fixation.Results: Compared with the intact state, anterior decompression with AAOJ arthroplasty resulted in a significant decrease in the range of motion (ROM) and neutral zone (NZ) during flexion, extension and lateral bending (P less than 0.05); however, with regard to axial rotation, there was no significant difference in ROM and NZ (P larger than 0.05). Compared with anterior decompression with ATAS fixation, anterior decompression with AAOJ arthroplasty during flexion, extension and lateral bending, significant difference was found in ROM and NZ (P larger than 0.05); however, as for axial rotation, there was a significant increase in ROM and NZ (P less than 0.05). Conclusion: The self-designed AAOJ has an excellent biomechanical performance, which can restore excellent instant stability and preserve the movement of the atlantoaxial joint.
Yong Hu; Yong-Jie Gu; Zhen-Shan Yuan; Xian-Feng He; Wei-Xin Dong; Wei-Dong Zhao
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Chinese journal of traumatology = Zhonghua chuang shang za zhi / Chinese Medical Association     Volume:  15     ISSN:  1008-1275     ISO Abbreviation:  Chin. J. Traumatol.     Publication Date:  2012 Dec 
Date Detail:
Created Date:  2012-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100886162     Medline TA:  Chin J Traumatol     Country:  China    
Other Details:
Languages:  eng     Pagination:  329-33     Citation Subset:  IM    
Department of Spinal Surgery, Ningbo Sixth Hospital, Ningbo 315040, Zhejiang Province, China.
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