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One hundred and fifty years of history of the Morse taper: from Stephen A. Morse in 1864 to complications related to modularity in hip arthroplasty

2013; Springer Science+Business Media; Volume: 37; Issue: 10 Linguagem: Inglês

10.1007/s00264-013-1927-0

1432-5195

Philippe Hernigou, Steffen Queinnec, Charles-Henri Flouzat–Lachaniette,

Hip disorders and treatments

The Morse Taper was invented in 1864 by Stephen A. Morse, an enterprising mechanic, who developed it to reliably join two rotating machine components.The orthopaedic industry has adapted these tapers, under the generic name of Morse tapers, as a means of reliably joining modular components of total joints directly on the operation table.The principle of the Morse taper is that of the cone in the cone.The trunnion (the male portion) and the bore (the female portion) are both uniformly tapered.When the bore in the femoral head is tapped onto the trunnion of the femoral stem they come into intimate contact.The conical femoral taper compresses the walls in the bore as it expands.Thus, the stresses inside the materials keep both components fixed together.Morse taper technology and design began with the ideas of one man.From his ideas a company grew to become the leader in the design and manufacture of metal cutting tools.Stephen A. Morse, an enterprising mechanic, developed a new and better way to drill a hole in 1864 when he invented the twist drill.Machine tool operators must be able to install or remove tool bits quickly and easily.A lathe, for example, has a rotating spindle in its headstock, to which one may want to mount a spur drive or work in a collet.Another example is a drill press, to which an operator may want to mount a bit directly, or by using a drill chuck.Virtually all milling machines, from the oldest, manual machines up to the most modern machines use tooling that is guided on a tapered surface.The machine taper is a simple, low-cost, highly repeatable, and versatile tool mounting system that uses tool bits (or holders) with gradually tapered shanks and a matching hollowed-out spindle.