Composite femoral implant having increased neck strength

Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

623 23, 623 11, 623 16, 623 18, A61F 232

Patent

active

055229042

ABSTRACT:
A femoral implant for a hip prosthesis includes a shaft oriented in a longitudinal direction and a neck extending from said shaft at an acute angle .theta. to the longitudinal direction. The implant includes a plurality of layers of fibers in a matrix, wherein the fibers are substantially unidirectional in each respective layer. The implant is made from a stack of layers of the matrix so that the direction of fibers is unbalanced. At least 50% of the fibers are oriented in the .theta. direction and the remainder of said fibers are oriented in directions other than the .theta. angle.

REFERENCES:
patent: 3463158 (1967-01-01), Schmitt et al.
patent: 3893196 (1975-07-01), Hochman
patent: 4157181 (1979-06-01), Cecka
patent: 4221623 (1980-09-01), Heissler et al.
patent: 4268468 (1981-05-01), Esper et al.
patent: 4329743 (1982-05-01), Alexander et al.
patent: 4356571 (1982-11-01), Esper et al.
patent: 4397048 (1983-08-01), Brown et al.
patent: 4403606 (1983-09-01), Woo et al.
patent: 4411027 (1983-10-01), Alexander et al.
patent: 4459708 (1984-07-01), Buttazzoni
patent: 4506681 (1985-03-01), Mundell
patent: 4512038 (1985-04-01), Alexander et al.
patent: 4662887 (1987-05-01), Turner et al.
patent: 4714467 (1987-12-01), Lechner et al.
patent: 4738681 (1988-04-01), Koeneman et al.
patent: 4750905 (1988-06-01), Koeneman et al.
patent: 4778469 (1988-10-01), Lin et al.
patent: 4892552 (1990-01-01), Ainsworth et al.
patent: 4902297 (1990-02-01), Devanathan
patent: 4978360 (1990-12-01), Devanathan
patent: 5064439 (1991-11-01), Chang et al.
patent: 5163962 (1992-11-01), Salzstein et al.
patent: 5181930 (1993-01-01), Dumbleton et al.
R. Weiss, et al, "High Performance Carbon Fibre Reinforced Polysulfone", Looking Ahead For Materials and Processes, pp. 415-428 (Ed. J. de Boussu, et al., Elsevier Science Publishers, Amsterdam, 1987).
F. P. Magee, et al., "A Canine Composite Femoral Stem", Clinacal Orthopaedics and Related Research, pp. 237-252 (1988).
E. Morscher, et al., "The Treatment of Femoral Neck Fractures with an Isoelastic Endoprosthesis Implanted Without Bone Cement", Arch. Orthop. Traumat. Surg. 98:93-100 (1981).
M. S. Hunt. "Development of Carbon Fibre/Polysulphone Orthopaedic Implants" 1987.
M. S. Hunt. "Fibre Reinforced Composites For Orthopaedic Surgical Implants" 1981.
W. Huettner et al. "Carbon Fiber-Reinforced Polysulphone", Abstr. Program--Bienn. Confr. Carbon 1983, 16th, 482-3; 1983.
W. Huttner und K. J. Huttinger. "Verwendung von Kohlenstoff als Implantatmaterial" 81-94; 1983.
K. J. Huttinger & W. Huttner. "Carbon Materials for Endoprosthetic Joints". 138-149. 1983.
R. N. King et al. "Novel Uses of Fibers As Tendons and Bones". 335-351. 1977.
Moshe Roffman, M. D. et al. "Carbon Fiber Reinforced Polysulfone Hip Implant: Experimental Study in Dogs". Oct. 1 Oct. 3. 1985.
Derwent Abstract of French Patent No. 2.104.009.
Derwent Abstract of US 3,893,196.
Derwent Abstract of French Patent No. 2.350.825 and DE 2625529.
Derwent Abstract of DE 2621123.
Derwent Abstract of DE 2621124.
D. Scola et al, "The Effect of Process Variables on the Dry and Wet Shear Strength of Fiber Reinforced Polysulfone Composites", Proc. 23rd Nat. Synp. Exhib. Adv. Mat. Process Eng. (1978).
Huttinger et al., "Carbon Materials for Endoprosthetic Joints", Extended Abstracts of the International Symposium on Carbon, 1982, pp. 138-149.
Gillespie, Jr. et al., "CMAP--Composite Materials Analysis of Plates", CCM Report 87-45, Center for Composite Materials, University of Delaware, 1987.
Bergmann et al., "Hip Joint Loading During Walking and Running, Measured in Two Patients," submitted for publication to Journal of Biomechanics, 1992.
International Organization for Standardization, "Implants for Surgery-Partial and Total Hip Joint Prostheses: Part 6: Determination of Endurance Properties of Head and Neck Region of Stemmed Femoral Components", ISO 7206-6, 1992.
Gregory Born McKenna, "The Development of Fiber Reinforced Polymer Composites for Orthopedic Applications", Xerox University Microfilms, Ann Arbor, Michigan, 1976, pp. 226-232.
Kenneth R. St. John, "Applications of Advanced Composites In Orthopaedic Implants", Biocompatible Polymers, Metals, And Composities, Technomic Publishing Co., Inc., Lancaster, PA., 1983, pp. 861-871.
L. Claes et al., "Experimental Investigations On Hip Prostheses With Carbon Fibre Reinforced Carbon Shafts and Ceramic Heads" Ceramics In Surgery, Elsevier Scientific Publishing Company,Amsterdam, The Netherlands, 1983, pp. 243-250.
M. S. Hunt, "Carbon Fibre Reinforced Polysulphone for Orthopaedic Surgical Implants", International Conference Biomedical Polymers--International Symposium--Contact lenses & Artificial Eyes, The Biological Engineering Society, London, 1982, pp.89-96.
L. Srinivasa Iyer et al., "Development of Optimized Epoxy Graphite Implant for the Total Hip Joint", ISA Transactions, vol. 23, No. 2, 1984, pp. 7-14.
"The Effect of Process Variables on the Dry And Wet Shear Strength of Fiber Reinforced Polysulfone Composites", by Daniel A. Scola and Margaret E. Roylance.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Composite femoral implant having increased neck strength does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Composite femoral implant having increased neck strength, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite femoral implant having increased neck strength will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-380449

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.