OPENING MEASUREMENT INSTRUMENT - NAT UNIV CORP TOKYO MED & DENT

Title:

OPENING MEASUREMENT INSTRUMENT

Document Type and Number:

WIPO Patent Application WO/2015/030185

Kind Code:

A1

Abstract:

Provided is an opening measurement instrument which exhibits excellent instrument stability during measurement, and excellent measurement accuracy and reproducibility thereof. This opening measurement instrument is provided with: an engagement part which measures an opening amount between an upper jaw and a lower jaw, and which engages with first reference teeth in one of the jaws; a measurement surface which, while the engagement part is in a state of being engaged with the first reference teeth, is brought into contact with second reference teeth in the other jaw; and a first scale which is provided to the measurement surface, and which indicates the distance from the engagement part. The opening measurement instrument is preferably further provided with a second scale which is provided to the measurement surface, and which indicates the position of a direction orthogonal to the direction in which the first scale is provided. The measurement surface is preferably configured from a curved surface in which the measurement surface between the engagement part and a prescribed point of the measurement surface bulges with respect to a flat surface connecting the engagement part and the prescribed point of the measurement surface. Furthermore, the curved surface is preferably provided with a section having a curvature which increases as the distance from the engagement part increases.

Inventors:

YOSHITAKE HIROYUKI (JP)

Application Number:

PCT/JP2014/072764

Publication Date:

March 05, 2015

Filing Date:

August 29, 2014

Export Citation:

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Assignee:

NAT UNIV CORP TOKYO MED & DENT (JP)

International Classes:

A61C19/045; A61B5/11; G01B3/04

Foreign References:

US5361506A	1994-11-08
JP3150439U	2009-05-21
US4997368A	1991-03-05
GB2494232A	2013-03-06
US5158096A	1992-10-27
JP2004329431A	2004-11-25
JP5004291B2	2012-08-22
JP1369820S

Other References: