Surgery – Instruments – Orthopedic instrumentation
Patent
1997-07-29
2000-09-19
Yu, Mickey
Surgery
Instruments
Orthopedic instrumentation
606 79, 623 1711, A61B 1700, A61F 244
Patent
active
061205060
ABSTRACT:
A lordotic implant has a frusto-conical shape with external threads. Prior to placement of the implant, vertebrae are distracted in a manner to provide a desired lordosis between the vertebrae. The pre-distracted vertebrae are then tapped to provide a tapped bore having a geometry matching the conical geometry of the implant. The threaded implant is then placed within the pre-tapped conical bore.
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Publication entitled "Ray Cervical Threaded Fusion Cage" of Surgical Dynamics, Concord, California, dated 1994.
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Bernardt, Normal Spinal Anatomy: Normal Sagittal Plan Alignment, Textbook of Spinal Surgery, Second Edition, Chapter 16 (pp. 185-191), Bridwell et al. editors, Lippincott-Raven Publishers, 1997.
Kohrs Douglas W.
Sand Paul M.
Stewart Alvin
Sulzer Spine-Tech Inc.
Yu Mickey
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