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Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions

BACKGROUND: The footprint of most prostheses is designed according to Caucasian data. Total disc replacement (TDR) has been performed widely for cervical degenerative diseases in China. It is essential to analyze the match sizes of prostheses footprints and Chinese cervical anatomic dimensions in ou...

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Autores principales: Dong, Liang, Tan, Ming-Sheng, Yan, Qin-Hua, Yi, Ping, Yang, Feng, Tang, Xiang-Sheng, Hao, Qing-Ying
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4837838/
https://www.ncbi.nlm.nih.gov/pubmed/25591562
http://dx.doi.org/10.4103/0366-6999.149200
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author Dong, Liang
Tan, Ming-Sheng
Yan, Qin-Hua
Yi, Ping
Yang, Feng
Tang, Xiang-Sheng
Hao, Qing-Ying
author_facet Dong, Liang
Tan, Ming-Sheng
Yan, Qin-Hua
Yi, Ping
Yang, Feng
Tang, Xiang-Sheng
Hao, Qing-Ying
author_sort Dong, Liang
collection PubMed
description BACKGROUND: The footprint of most prostheses is designed according to Caucasian data. Total disc replacement (TDR) has been performed widely for cervical degenerative diseases in China. It is essential to analyze the match sizes of prostheses footprints and Chinese cervical anatomic dimensions in our study. METHODS: The anatomic dimensions of the C4–C7 segments of 138 patients (age range 16–77 years) in a Chinese population were measured by computed tomography scans. We compared the footprints of the most commonly used cervical disc prostheses (Bryan: Medtronic, Minneapolis, MN, USA; Prestige LP: Medtronic, Fridley, Minnesota, USA; Discover: DePuy, Raynham, MA, USA; Prodisc-C: Synthes, West Chester, PA, USA) in China with Chinese cervical anatomic dimensions and assessed the match of their size. RESULTS: The mismatch of available dimensions of prostheses and anatomic data of cervical endplates ranged from 17.03% (C4/C5, Prestige LP, Prodisc-C) to 57.61% (C6/C7, Discover) in the anterior-posterior (AP) diameter, and 35.51% (C4/C5, Prodisc-C, Prestige LP) to 94.93% (C6/C7, Bryan) in the center mediolateral (CML) diameter. About 21.01% of endplates were larger than the largest prostheses in the AP diameter and 57.25% in the CML diameter. All available footprints of prostheses expect the Bryan with an unfixed height, can accommodate the disc height (DH), however, 36.23% of the middle DH was less than the smallest height of the prostheses. The average disc sagittal angles (DSAs) of C4–C7 junctions were 5.04°, 5.15°, and 4.13° respectively. Only the Discover brand had a built-in 7° lordotic angle, roughly matching with the DSA. CONCLUSIONS: There is a large discrepancy between footprints of prostheses and Chinese cervical anatomic data. In recent years, possible complications of TDR related with mismatch sizes are increasing, such as subsidence, displacement, and heterotopic ossification. Manufacturers of prostheses should introduce or produce additional footprints of prostheses for Chinese TDR.
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spelling pubmed-48378382016-05-02 Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions Dong, Liang Tan, Ming-Sheng Yan, Qin-Hua Yi, Ping Yang, Feng Tang, Xiang-Sheng Hao, Qing-Ying Chin Med J (Engl) Original Article BACKGROUND: The footprint of most prostheses is designed according to Caucasian data. Total disc replacement (TDR) has been performed widely for cervical degenerative diseases in China. It is essential to analyze the match sizes of prostheses footprints and Chinese cervical anatomic dimensions in our study. METHODS: The anatomic dimensions of the C4–C7 segments of 138 patients (age range 16–77 years) in a Chinese population were measured by computed tomography scans. We compared the footprints of the most commonly used cervical disc prostheses (Bryan: Medtronic, Minneapolis, MN, USA; Prestige LP: Medtronic, Fridley, Minnesota, USA; Discover: DePuy, Raynham, MA, USA; Prodisc-C: Synthes, West Chester, PA, USA) in China with Chinese cervical anatomic dimensions and assessed the match of their size. RESULTS: The mismatch of available dimensions of prostheses and anatomic data of cervical endplates ranged from 17.03% (C4/C5, Prestige LP, Prodisc-C) to 57.61% (C6/C7, Discover) in the anterior-posterior (AP) diameter, and 35.51% (C4/C5, Prodisc-C, Prestige LP) to 94.93% (C6/C7, Bryan) in the center mediolateral (CML) diameter. About 21.01% of endplates were larger than the largest prostheses in the AP diameter and 57.25% in the CML diameter. All available footprints of prostheses expect the Bryan with an unfixed height, can accommodate the disc height (DH), however, 36.23% of the middle DH was less than the smallest height of the prostheses. The average disc sagittal angles (DSAs) of C4–C7 junctions were 5.04°, 5.15°, and 4.13° respectively. Only the Discover brand had a built-in 7° lordotic angle, roughly matching with the DSA. CONCLUSIONS: There is a large discrepancy between footprints of prostheses and Chinese cervical anatomic data. In recent years, possible complications of TDR related with mismatch sizes are increasing, such as subsidence, displacement, and heterotopic ossification. Manufacturers of prostheses should introduce or produce additional footprints of prostheses for Chinese TDR. Medknow Publications & Media Pvt Ltd 2015-01-20 /pmc/articles/PMC4837838/ /pubmed/25591562 http://dx.doi.org/10.4103/0366-6999.149200 Text en Copyright: © 2015 Chinese Medical Journal http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
spellingShingle Original Article
Dong, Liang
Tan, Ming-Sheng
Yan, Qin-Hua
Yi, Ping
Yang, Feng
Tang, Xiang-Sheng
Hao, Qing-Ying
Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions
title Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions
title_full Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions
title_fullStr Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions
title_full_unstemmed Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions
title_short Footprint Mismatch of Cervical Disc Prostheses with Chinese Cervical Anatomic Dimensions
title_sort footprint mismatch of cervical disc prostheses with chinese cervical anatomic dimensions
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4837838/
https://www.ncbi.nlm.nih.gov/pubmed/25591562
http://dx.doi.org/10.4103/0366-6999.149200
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