New concepts - Biomechanical studies of a newly designed femoral prosthesis (cervico-trochanter prosthesis)

Chun Hsiung Shih, Weng Pin Chen, Ching Lung Tai, Rong Fu Kuo, Chi Chuan Wu, Chih Hwa Chen

研究成果: 雜誌貢獻文章

13 引文 (Scopus)

摘要

Objective. A newly designed stemless (cervico-trochanter) prosthesis was developed for the purpose of reducing the incidence of the stress-shielding effect caused by the traditional stem-type prosthesis. Design. Both mechanical test and three-dimensional finite element analysis were performed for comparing the differences of strain and stress distributions between the intact, C-T and PCA prosthetic femora. Background. The stress-shielding effect and polyethylene (PE) wear debris were thought to be the main factors that resulted in local bone loss after the implantation of stem-type prostheses. In this study, we developed the new C-T prosthesis, which aimed to resolve the above-mentioned problems. Methods. Six pairs of femora taken from human male cadavers were used to compare the strain magnitudes of intact (n = 12), C-T (n = 12) and PCA (n = 4) prosthetic femora in specific positions. Failure load tests of C-T (n = 8) and PCA (n = 12) prosthetic femora were also carried out from the load-displacement curve. The analysis of variance (ANOVA) test was used for statistical analysis. In addition, three-dimensional finite element stress analyses were performed using a commercial package, ANSYS, on a Convex 3810 computer. Results. Both mechanical test and finite element results showed that the C-T prosthetic femora has a lower stress-shielding tendency than the PCA prosthetic femora (P <0.001). The C-T prosthetic femora also withstood an average bearing load of 6312 N, which is greater than that of the PCA prosthesis at 5358 N (P <0.01). Conclusions. The C-T prosthetic femur could withstand a higher failure load than the PCA prosthesis, which effectively reduced the incidence of the stress-shielding effect. Moreover, the particular design of the C-T prosthesis also reduced localized osteolysis because of the overall coverage of the neck-trochanteric area.

原文英語
頁(從 - 到)482-490
頁數9
期刊Clinical Biomechanics
12
發行號7-8
DOIs
出版狀態已發佈 - 十月 1997
對外發佈Yes

指紋

Thigh
Femur
Prostheses and Implants
Passive Cutaneous Anaphylaxis
Finite Element Analysis
Prosthesis Implantation
Osteolysis
Incidence
Polyethylene
Cadaver
Analysis of Variance
Neck
Bone and Bones

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

引用此文

New concepts - Biomechanical studies of a newly designed femoral prosthesis (cervico-trochanter prosthesis). / Shih, Chun Hsiung; Chen, Weng Pin; Tai, Ching Lung; Kuo, Rong Fu; Wu, Chi Chuan; Chen, Chih Hwa.

於: Clinical Biomechanics, 卷 12, 編號 7-8, 10.1997, p. 482-490.

研究成果: 雜誌貢獻文章

Shih, Chun Hsiung ; Chen, Weng Pin ; Tai, Ching Lung ; Kuo, Rong Fu ; Wu, Chi Chuan ; Chen, Chih Hwa. / New concepts - Biomechanical studies of a newly designed femoral prosthesis (cervico-trochanter prosthesis). 於: Clinical Biomechanics. 1997 ; 卷 12, 編號 7-8. 頁 482-490.
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abstract = "Objective. A newly designed stemless (cervico-trochanter) prosthesis was developed for the purpose of reducing the incidence of the stress-shielding effect caused by the traditional stem-type prosthesis. Design. Both mechanical test and three-dimensional finite element analysis were performed for comparing the differences of strain and stress distributions between the intact, C-T and PCA prosthetic femora. Background. The stress-shielding effect and polyethylene (PE) wear debris were thought to be the main factors that resulted in local bone loss after the implantation of stem-type prostheses. In this study, we developed the new C-T prosthesis, which aimed to resolve the above-mentioned problems. Methods. Six pairs of femora taken from human male cadavers were used to compare the strain magnitudes of intact (n = 12), C-T (n = 12) and PCA (n = 4) prosthetic femora in specific positions. Failure load tests of C-T (n = 8) and PCA (n = 12) prosthetic femora were also carried out from the load-displacement curve. The analysis of variance (ANOVA) test was used for statistical analysis. In addition, three-dimensional finite element stress analyses were performed using a commercial package, ANSYS, on a Convex 3810 computer. Results. Both mechanical test and finite element results showed that the C-T prosthetic femora has a lower stress-shielding tendency than the PCA prosthetic femora (P <0.001). The C-T prosthetic femora also withstood an average bearing load of 6312 N, which is greater than that of the PCA prosthesis at 5358 N (P <0.01). Conclusions. The C-T prosthetic femur could withstand a higher failure load than the PCA prosthesis, which effectively reduced the incidence of the stress-shielding effect. Moreover, the particular design of the C-T prosthesis also reduced localized osteolysis because of the overall coverage of the neck-trochanteric area.",
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AU - Shih, Chun Hsiung

AU - Chen, Weng Pin

AU - Tai, Ching Lung

AU - Kuo, Rong Fu

AU - Wu, Chi Chuan

AU - Chen, Chih Hwa

PY - 1997/10

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N2 - Objective. A newly designed stemless (cervico-trochanter) prosthesis was developed for the purpose of reducing the incidence of the stress-shielding effect caused by the traditional stem-type prosthesis. Design. Both mechanical test and three-dimensional finite element analysis were performed for comparing the differences of strain and stress distributions between the intact, C-T and PCA prosthetic femora. Background. The stress-shielding effect and polyethylene (PE) wear debris were thought to be the main factors that resulted in local bone loss after the implantation of stem-type prostheses. In this study, we developed the new C-T prosthesis, which aimed to resolve the above-mentioned problems. Methods. Six pairs of femora taken from human male cadavers were used to compare the strain magnitudes of intact (n = 12), C-T (n = 12) and PCA (n = 4) prosthetic femora in specific positions. Failure load tests of C-T (n = 8) and PCA (n = 12) prosthetic femora were also carried out from the load-displacement curve. The analysis of variance (ANOVA) test was used for statistical analysis. In addition, three-dimensional finite element stress analyses were performed using a commercial package, ANSYS, on a Convex 3810 computer. Results. Both mechanical test and finite element results showed that the C-T prosthetic femora has a lower stress-shielding tendency than the PCA prosthetic femora (P <0.001). The C-T prosthetic femora also withstood an average bearing load of 6312 N, which is greater than that of the PCA prosthesis at 5358 N (P <0.01). Conclusions. The C-T prosthetic femur could withstand a higher failure load than the PCA prosthesis, which effectively reduced the incidence of the stress-shielding effect. Moreover, the particular design of the C-T prosthesis also reduced localized osteolysis because of the overall coverage of the neck-trochanteric area.

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KW - Finite element analysis

KW - Proximal femoral strains

KW - Stemless prosthesis

KW - Stress shielding

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