Surgery – Truss – Perineal
Patent
1975-11-03
1977-11-15
Kamm, William E.
Surgery
Truss
Perineal
32 1, A61B 510
Patent
active
040581152
ABSTRACT:
The force which is to act upon the tooth depends only on the field strength of an applied magnetic field, upon the length and number of the electrical conductors through which the magnetic field passes and upon the current flowing through the conductors. The rigid medium can alter its position relative to the examination head without current added to the area of constant field intensity altering the force. In this manner, it is also possible to achieve good examination results even without complicated, troublesome and expensive creation of a fixed point by means of a mouth insert. The head of the test subject is held still by means of a head or chin support. The transducer head can be alternatively retained in a support or even by hand. With the aid of an electronic function generator, any desired time function for the force acting on the tooth, regardless of whether a sinusoidal, rectangular, stepped or sawtooth increase in force is desired is produced.
REFERENCES:
patent: 2492617 (1949-12-01), Boland et al.
patent: 3070087 (1962-12-01), Sittel
patent: 3308653 (1967-03-01), Roth
patent: 3420222 (1969-01-01), Noe et al.
patent: 3943913 (1976-03-01), Johnson
Henderson, "American Journal of Physiology", vol. 14, 1905, pp. 287-298.
Kamm William E.
Netter George J.
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