SE0401910D0 - Apical constriction locator - Google Patents

Apical constriction locator

Info

Publication number
SE0401910D0
SE0401910D0 SE0401910A SE0401910A SE0401910D0 SE 0401910 D0 SE0401910 D0 SE 0401910D0 SE 0401910 A SE0401910 A SE 0401910A SE 0401910 A SE0401910 A SE 0401910A SE 0401910 D0 SE0401910 D0 SE 0401910D0
Authority
SE
Sweden
Prior art keywords
frequency signal
high frequency
signal
distance
locator
Prior art date
Application number
SE0401910A
Other languages
Swedish (sv)
Inventor
Jonas Martynaitis
Rimantas Povilas Masiulis
Original Assignee
Jonas Martynaitis
Rimantas Povilas Masiulis
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jonas Martynaitis, Rimantas Povilas Masiulis filed Critical Jonas Martynaitis
Priority to SE0401910A priority Critical patent/SE0401910D0/en
Publication of SE0401910D0 publication Critical patent/SE0401910D0/en
Priority to GB0701779A priority patent/GB2431358B8/en
Priority to PCT/IB2005/003414 priority patent/WO2006021891A1/en

Links

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
    • 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
    • A61C19/041—Measuring instruments specially adapted for dentistry for measuring the length of the root canal of a tooth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/062—Measuring instruments not otherwise provided for penetration depth
    • 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
    • A61C19/042—Measuring instruments specially adapted for dentistry for determining the position of a root apex

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)

Abstract

The present invention relates to instrumentation and method for determining the distance between a dental probe located in a root canal of a tooth and the apical constriction. Two excitation signals are applied between the dental probe and an electrode located in electrical contact with oral mucosa and using these two signals comprising alternating voltages of different frequencies a signal is measured and a lower frequency signal is used to cancel errors due to media dependencies by applying an error signal obtained from a low frequency signal to the high frequency component using an analogue negative feedback system. The high frequency signal then contains all distance information and is error eliminated. Thus by sampling only the high frequency signal an accurate and stable measure of the distance is obtained.
SE0401910A 2004-07-21 2004-07-21 Apical constriction locator SE0401910D0 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE0401910A SE0401910D0 (en) 2004-07-21 2004-07-21 Apical constriction locator
GB0701779A GB2431358B8 (en) 2004-07-21 2005-07-13 Apical constriction locator
PCT/IB2005/003414 WO2006021891A1 (en) 2004-07-21 2005-07-13 Apical constriction locator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0401910A SE0401910D0 (en) 2004-07-21 2004-07-21 Apical constriction locator

Publications (1)

Publication Number Publication Date
SE0401910D0 true SE0401910D0 (en) 2004-07-21

Family

ID=32906870

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0401910A SE0401910D0 (en) 2004-07-21 2004-07-21 Apical constriction locator

Country Status (3)

Country Link
GB (1) GB2431358B8 (en)
SE (1) SE0401910D0 (en)
WO (1) WO2006021891A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1392415B1 (en) * 2008-12-23 2012-03-02 Advanced Technology Res A T R S R L INSTRUMENT AND METHOD FOR DETECTING THE BEACH POSITION.
CN109199625B (en) * 2018-08-22 2021-03-19 施程峰 Root canal length measuring method and root canal length measuring instrument

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02271854A (en) * 1989-04-14 1990-11-06 Takeshi Saito Dental root canal treating device
JP2000060878A (en) * 1998-08-24 2000-02-29 Toei Denki Kk Root apex position detector

Also Published As

Publication number Publication date
GB2431358A (en) 2007-04-25
GB0701779D0 (en) 2007-03-14
GB2431358B8 (en) 2010-06-30
WO2006021891A1 (en) 2006-03-02
GB2431358B (en) 2010-05-05
GB2431358A8 (en) 2010-06-30

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