GB2431358A - Apical constriction locator - Google Patents

Apical constriction locator Download PDF

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Publication number
GB2431358A
GB2431358A GB0701779A GB0701779A GB2431358A GB 2431358 A GB2431358 A GB 2431358A GB 0701779 A GB0701779 A GB 0701779A GB 0701779 A GB0701779 A GB 0701779A GB 2431358 A GB2431358 A GB 2431358A
Authority
GB
United Kingdom
Prior art keywords
frequency signal
high frequency
signal
distance
locator
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB0701779A
Other versions
GB2431358B8 (en
GB2431358B (en
GB0701779D0 (en
GB2431358A8 (en
Inventor
Jonas Martynaitis
Rimantus Masiulis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB0701779D0 publication Critical patent/GB0701779D0/en
Publication of GB2431358A publication Critical patent/GB2431358A/en
Application granted granted Critical
Publication of GB2431358B publication Critical patent/GB2431358B/en
Publication of GB2431358B8 publication Critical patent/GB2431358B8/en
Publication of GB2431358A8 publication Critical patent/GB2431358A8/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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.

Description

GB 2431358 A continuation (72) Inventor(s): Jonas Martynaitis Rimantus
Masiulis (74) Agent and/or Address for Service: Appleyard Lees dare Road, HALIFAX, West Yorkshire, HX1 2HY, United Kingdom
GB0701779A 2004-07-21 2005-07-13 Apical constriction locator Expired - Fee Related GB2431358B8 (en)

Applications Claiming Priority (2)

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

Publications (5)

Publication Number Publication Date
GB0701779D0 GB0701779D0 (en) 2007-03-14
GB2431358A true GB2431358A (en) 2007-04-25
GB2431358B GB2431358B (en) 2010-05-05
GB2431358B8 GB2431358B8 (en) 2010-06-30
GB2431358A8 GB2431358A8 (en) 2010-06-30

Family

ID=32906870

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0701779A Expired - Fee Related GB2431358B8 (en) 2004-07-21 2005-07-13 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5017134A (en) * 1989-04-14 1991-05-21 Tsuyoshi Saito Dental system for treating a root canal
US6059569A (en) * 1998-08-24 2000-05-09 Toei Electric Co., Ltd. Apical position detection apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5017134A (en) * 1989-04-14 1991-05-21 Tsuyoshi Saito Dental system for treating a root canal
US6059569A (en) * 1998-08-24 2000-05-09 Toei Electric Co., Ltd. Apical position detection apparatus

Also Published As

Publication number Publication date
GB2431358B8 (en) 2010-06-30
GB2431358B (en) 2010-05-05
SE0401910D0 (en) 2004-07-21
GB0701779D0 (en) 2007-03-14
WO2006021891A1 (en) 2006-03-02
GB2431358A8 (en) 2010-06-30

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20150709 AND 20150715

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20200713