Detecting dental apical foramina

• US 20050175967A1
• Filed: 05/09/2003
• Published: 08/11/2005
• Est. Priority Date: 05/09/2002
• Status: Abandoned Application

• Current Assignee: Dentsply Canada Ltd.
• Original Assignee: Neks Technologies Inc.
• Inventors: Montini, Emmanuel, Karazivan, Naim, Ayotte, Francois
• Application Number:
  US10/513,578
• Publication Number:
  US 20050175967A1
• Time in Patent Office: Days
• US Class Current: 433/229
• CPC Class Codes: A61B 5/0088 for oral or dental tissue
• CPC Class Codes: A61C 19/04 Measuring instruments specially adapted for dentistry A61C5/44 takes precedence; testing vitality of teeth A61B5/0534; radiation diagnosis specially adapted for dentistry A61B6/51
• CPC Class Codes: A61C 19/042 for determining the position of a root apex

Abstract

A system for detecting dental root canal apical foramina of a tooth (T) comprises an electromagnetic conductor for directing at least one initial radiation (Ir) onto a tooth structure to be evaluated, an electromagnetic collector for collecting at least one resulting electromagnetic radiation (Rr) that has been at least one of reflected by and transmitted through the tooth (T) as a result of the initial radiation (Ir). The collector is adapted to deliver the resulting electromagnetic radiation (Rr) to a detection device (D). The detection device (D) is adapted to compare at least one intensity of the at least one resulting radiation (Rr) with at least one predetermined value that corresponds to one of the presence and absence of dental root canal apical foramina. This enables the diagnosis of the presence or absence of dental root canal apical foramina on the tooth structure.

Claims

1. A system for locating a root canal apical foramen of a tooth, comprising a conductor for bringing at least one initial radiation onto a root canal, a collector for collecting at least one resulting radiation that has been reflected by and/or transmitted through the root canal as a result of said initial radiation, said collector being adapted to deliver said resulting radiation to a detection device, said detection device being adapted to compare at least one intensity of said at least one resulting radiation with at least one predetermined value that corresponds to the presence or absence of a root canal apical foramen, thereby enabling to locate the root canal apical foramen.

2. A system as defined in claim 1, wherein at least one wavelength of said at least one initial radiation is in the infrared spectrum.

3. A system as defined in claim 1, wherein a marker with an affinity with root canal apical foramina is provided, said marker having particular reflectance/transmittance properties when irradiated with visible or invisible radiation.

4. A system as defined in claim 1, wherein at least one of said conductor and said collector comprises an optical fibre adapted to be inserted in the root canal.

5. A system as defined in claim 4, wherein said optical fibre is contained in a tube adapted to be inserted in the root canal.

6. A system as defined in claim 1, wherein said detection device is also adapted to compare at least one wavelength of said at least one resulting radiation with at least one further predetermined value that corresponds to one of the presence and absence of dental root canal apical foramina.

7. A system as defined in claim 1, wherein said detection device is adapted to provide a signal that indicates one of the presence and absence of dental root canal apical foramina.

8. A system as defined in claim 1, wherein said detection device is adapted to provide information that is indicative of one of the presence and absence of dental root canal apical foramina, such that said information can be interpreted by an operator that is then able to locate the root canal apical foramina.

9. A system for locating a root canal apical foramen of a tooth, comprising a conductor for directing at least one initial radiation onto a root canal, a collector for collecting at least one resulting radiation that has been reflected by and/or transmitted through the root canal as a result of said initial radiation, said collector being adapted to deliver said resulting radiation to a detection device, said detection device being adapted to compare at least one wavelength of said at least one resulting radiation with at least one predetermined value that corresponds to the presence or to the absence of a root canal apical foramen, thereby enabling to locate the root canal apical foramen of the tooth.

10. A method for locating a root canal apical foramen of a tooth, comprising the steps of irradiating a root canal of a tooth with an initial radiation, collecting a reflected and/or transmitted resulting radiation, comparing the wavelength(s) and/or the intensity(ies) of radiation(s) with a predetermined value(s) that corresponds to the presence or absence of a root canal apical foramen, thereby enabling to locate the root canal apical foramen.

11. A method as defined in claim 10, wherein at least one wavelength of said initial radiation is in the infrared spectrum.

12. A method as defined in claim 10, wherein a marker with an affinity with root canal apical foramina is provided, said marker having particular reflectance/transmittance properties when irradiated with visible or invisible radiation.

13. A method as defined in claim 10, wherein said initial radiation and said resulting radiation are conveyed via at least one optical fibre adapted to be inserted in the root canal.

14. A method as defined in claim 13, wherein said optical fibre is contained in a tube adapted to be inserted in the root canal.

15. A system for locating a root canal apical foramen of a tooth, comprising a probe adapted to be displaced in a root canal of a tooth, illumination means for illuminating with an incident light a region of the root canal, detection means for collecting the resulting light reflected by and/or transmitted through the root canal, and an analyzing system for providing a signal when measurements on the resulting light in one or more predetermined ranges of wavelengths fall within any first predetermined range of values that are characteristic of dental root canal apical foramen, or when said measurements do not fall within any second predetermined range of values that are characteristic of artifacts other than root canal apical foramen.

16. A system for locating a root canal apical foramen of a tooth, comprising a probe adapted to be displaced in a root canal of a tooth, illumination means for illuminating with an incident light a region of the root canal, detection means for collecting the resulting light reflected by and/or transmitted through the root canal, and an analyzing system for providing a signal when intensity measurements on the resulting light indicate one of the presence and absence of a root canal apical foramen.

17. A method for locating a root canal apical foramen of a tooth, comprising the steps of:

(a) providing an incident light on a region of a root canal of a tooth;

(b) collecting and measuring the resulting light reflected by and/or transmitted through said region of the root canal;

(c) analyzing said resulting light to determine if said resulting light is representative of the presence of a root canal apical foramen; and

(d) providing a signal to an operator that indicates that one of presence and absence of a root canal apical foramen has been detected in step (c).

18. A method as defined in claim 17, wherein, in step (c), the intensity of said resulting light is measured to evaluate the presence or absence of root canal apical foramina.