Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
  • A61C19/00—Dental auxiliary appliances
  • A61C19/04—Measuring instruments specially adapted for dentistry

Definitions

• the present invention relates to a method and also to an apparatus
• the invention for measuring the tightness between two contiguous bodies.
• appliances are placed in the mouth to maintain the accomplished result.
• the wearing time of the retentive appliances is successively reduced until
• recovery process is individual, and therefore if the recovery process is not
• US Patents 4,571 ,181 , and 4,664,627 describe mechanical type dental thickness gauges for measuring the spacing between teeth, but such mechanical gauges are relatively inaccurate and generally unsuitable for use
• An object of the present invention is to provide another method and
• the insertion element is forcibly inserted between the two teeth by attaching
• the insertion element is a
• strip of predetermined thickness preferably of stainless steel.
• the peak of the insertion force is preferably measured by one or
• strain gauges It is possible, however, to measure the peak insertion
• Orthod. Dentofac. Orthop. 97; 41-4, 1990 is based on the insertion of a
• the measurements are thus primarily a
• the present invention involves the forcible insertion of
• the invention also provides an instrument for measuring the
• Fig. 1 illustrates one form of measuring instrument constructed in
• Fig. 2 illustrates a set of the insertion elements or strips of different
• Fig. 3 illustrates typical results obtained when using three of the four
• Fig. 4 illustrates results produced when using a strip of single
• Fig. 5 is a typical strain curve
• Fig. 6 shows an embodiment of a device according to the present
• FIG. 1 there is illustrated one form of
• the instrument illustrated in Fig. 1 includes a holder, generally
• the measurement includes
• the insertion force increases as the insertion element is pushed downward
• Holder 2 includes a manually-graspable handle 10 mounting a U-
• frame 12 includes one or more strain gauges 16 which measures the strain
• the U-shaped frame 12 is constituted of a rod bent into a U-shape
• end extensions 18, 20 of the U-shaped frame serve as attaching elements
• the recording and/or displaying the measured insertion force Preferably, the
• measuring circuit 30 (which may be a Wheatstone Bridge) and the data
• acquisition system 32 are housed within the handle 10 for ease of use of
• the handle 10 ( Figure 6) preferably also includes a power supply 31 and preferably also a suitable display 33 for displaying the
• the one or more strain gauges 16 may be located outside of the one or more strain gauges 16
• handle 10 (as in Figure 1) or may alternatively be located within the
• strip 4a is of 0.05 mm
• strip 4b is of 0.10 mm
• strip 4c is of 0.15 mm
• strip 4d is of 0.20 mm.
• a strip 4 of suitable thickness is selected according to the particular case
• Handle 10 is attached to the ends 18, 20 of the U-shaped frame 12. Handle 10
• the 30 measures the insertion force, preferably including the peak insertion
• Fig. 3 illustrates the results of using the instrument illustrated in
• strip 4 was applied between the same two teeth, i.e., at the same single
• Curve A in Fig. 3 indicates the microstrain (in arbitrary tightness
• curve B indicates the results when the insertion
• Fig. 4 illustrates further typical results when a strip thickness of 0.15
• resistor-potentiometer system for measuring displacement.
• strips 4 to the instrument, e.g., arrangements for attaching blades to
• a single holder can hold a plurality of such

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Biophysics (AREA)
• Oral & Maxillofacial Surgery (AREA)
• Dentistry (AREA)
• Epidemiology (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=11065356

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Citations (3)

Family Cites Families (4)

• 1993
  • 1993-10-19 IL IL107325A patent/IL107325A/en not_active IP Right Cessation
• 1994
  • 1994-10-17 AU AU80799/94A patent/AU8079994A/en not_active Abandoned
  • 1994-10-17 WO PCT/US1994/011783 patent/WO1995010988A1/en not_active Application Discontinuation
  • 1994-10-17 JP JP7512135A patent/JPH09509336A/ja not_active Ceased
  • 1994-10-17 EP EP94931874A patent/EP0724413A4/de not_active Withdrawn

Patent Citations (3)

Non-Patent Citations (2)

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