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Optimal intersurface stability for unicompartmental femoral component design with two pegs placed on the distal resection surface: 5 mm peg length increment and 10° peg inclination.
Sun, Yandong; Li, Zhongyao; Zhao, Kaiyu; Dimitriou, Dimitris; Yang, Biao; Cao, Zhangyi; Ma, Xin; Cheng, Rongshan; Li, Pingyue; Tsai, Tsung-Yuan.
Afiliação
  • Sun Y; School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China.
  • Li Z; Engineering Research Center for Digital Medicine of the Ministry of Education, Shanghai Jiao Tong University, Shanghai, China, Shanghai, China.
  • Zhao K; MicroPort Orthopedics, Suzhou, China.
  • Dimitriou D; Department of Sport Medicine, Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, China.
  • Yang B; MicroPort Orthopedics, Suzhou, China.
  • Cao Z; Department of Orthopedics Balgrist University Hospital, Zürich, Switzerland.
  • Ma X; MicroPort Orthopedics, Suzhou, China.
  • Cheng R; MicroPort Orthopedics, Suzhou, China.
  • Li P; Department of Orthopedic Surgery, Shanghai Sixth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
  • Tsai TY; School of Biomedical Engineering & Med-X Research Institute, Shanghai Jiao Tong University, Shanghai, China.
Knee Surg Sports Traumatol Arthrosc ; 32(8): 2087-2096, 2024 Aug.
Article em En | MEDLINE | ID: mdl-38796724
ABSTRACT

PURPOSE:

The present study aimed to identify the optimal design of the unicompartmental femoral component through parameter analysis and stability evaluation.

METHODS:

A finite element (FE) analysis was applied to analyse and adjust the parameter combinations of the anterior tilt angle of the posterior condyle resection surface, the position of the peg, the length of the peg and the inclination angle of the peg, resulting in 10 different FE models. Setting three knee flexion angles of 8.4° (maximum load state during walking), 40° (maximum load state during stair climbing) and 90° (maximum load state during squatting exercise), quantitatively analysing the micromotion values of the bone-prosthesis interface and defining a weighted scoring formula to evaluate the stability of different FE models. The validity of the FE analysis was verified using the Digital Image Correlation (DIC) device.

RESULTS:

The errors between the FE analysis and the DIC test at three flexion angles were 5.6%, 1.7% and 11.1%. The 10 different femoral component design models were measured separately. The FE analysis demonstrated that the design with a 0° anterior tilt angle of the posterior condyle resection surface, both pegs placed on the distal resection surface, lengthened 5 mm pegs and a 10° peg inclination angle provided the best stability.

CONCLUSION:

The current study proposed a method for evaluating the stability of the femoral component design. The optimal intersurface stability design of the unicompartmental femoral component was achieved with two pegs placed on the distal resection surface, a 5-mm peg length increment and a 10° peg inclination. These results might provide a reference for the selection of unicompartmental femoral components in clinical practice and therefore improve the survival rate of future unicompartmental knee arthroplasty. LEVEL OF EVIDENCE Level III.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Desenho de Prótese / Artroplastia do Joelho / Análise de Elementos Finitos / Fêmur / Prótese do Joelho Limite: Humans Idioma: En Revista: Knee Surg Sports Traumatol Arthrosc Assunto da revista: MEDICINA ESPORTIVA / TRAUMATOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Desenho de Prótese / Artroplastia do Joelho / Análise de Elementos Finitos / Fêmur / Prótese do Joelho Limite: Humans Idioma: En Revista: Knee Surg Sports Traumatol Arthrosc Assunto da revista: MEDICINA ESPORTIVA / TRAUMATOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: China