Oral health measurement clamping probe, system, and method

• US 20060047190A1
• Filed: 08/26/2004
• Published: 03/02/2006
• Est. Priority Date: 08/26/2004
• Status: Active Grant

• Current Assignee: Oxford Optronix Ltd.
• Original Assignee: Perceptia Devices, Inc.
• Inventors: Jenkins, Julian, Robins, Tim, Feighery, Gareth, Grouwstra, Andre, Badawi, Essam, Evans, Kelvyn
• Granted Patent: US 7,440,788 B2
• Time in Patent Office: Days
• US Class Current: 600/340
• CPC Class Codes: A61B 2562/0238 Optical sensor arrangements for performing transmission measurements on body tissue
• CPC Class Codes: A61B 5/0088 for oral or dental tissue
• CPC Class Codes: A61B 5/0261 using optical means, e.g. infrared light
• CPC Class Codes: A61B 5/14552 Details of sensors specially adapted therefor
• CPC Class Codes: A61B 5/682 Mouth, e.g., oral cavity; tongue; Lips; Teeth

Abstract

Devices, systems, and methods determine the health of oral objects by providing objective measurements using a detachable probe body. The detachable probe body may isolate reusable system components (including an electromagnetic signal detection, signal transmission, energy generation, and or energy transmitting components) from the oral cavity, optionally by encasing at least a portion of one or more of these components in a sheath or the like. A window of the probe body maintains sterile isolation and transmits electromagnetic energy to and/or signals from the oral object. Accuracy can be enhanced by a clamp or other structure for engaging a surface of the oral object so as to maintain a fixed alignment between the signal receiver and the oral object.

Claims

1. A detachable probe body for use with an oral health measurement system for oral health measurements of an oral object within a mouth of the patient, the mouth having oral surfaces, the health measurement system having reusable components including an electromagnetic signal receiver coupled to a processor for evaluating a health-related characteristic of the mouth from an electromagnetic signal, the probe body comprising:

a window capable of transmitting the electromagnetic signal from the oral object to the signal receiver;

a casing extending from the window, the casing and window together defining an opening for receiving the signal receiver so as to provide isolation of the reusable components from the mouth; and

at least one probe surface oriented to engage one or more oral surfaces so as to maintain alignment between the signal receiver and the oral object.

2. The probe body of claim 1, wherein the at least one probe surface comprises a first probe surface region and a second probe surface region, the probe receiving the oral object with the first and second probe surface regions.

3. The probe body of claim 2, wherein the probe body comprises a first probe body portion having the first probe surface region and a second probe body portion having the second probe surface region, the second body portion movable relative to the first body portion.

4. The probe body of claim 3, further comprising a biasing structure urging the first probe surface region toward the second probe surface region when the oral object is at a desired position therebetween so as to accommodate a range of differing oral object sizes.

5. The probe body of claim 4, wherein the first portion slidingly receiving the second portion, the biasing structure comprising a spring urging the second region toward the first region when the oral object is received therebetween.

6. The probe body of claim 3, further comprising a ratchet coupling the first probe body portion to the second probe body portion, the ratchet oriented to allow movement of the first probe surface region toward the second probe surface region and to inhibit movement of the first probe surface region away from the second probe surface region.

7. The probe body of claim 3, wherein at least one of the first body portion, the second body portion, and an intermediate portion coupling the first and second body portions comprises a deformable material.

8. The probe body of claim 7, wherein the deformable material resiliently biases the first probe surface region toward the second probe surface region.

9. The probe body of claim 7, wherein the deformable material defines the first probe surface region, the deformable material being sufficiently soft to deform against the oral object when a dentist manually applies pressure.

10. The probe body of claim 5, wherein the first probe body portion moves toward the second body portion when a pressure is applied with an orientation lateral relative to the movement.

12. The probe body portion of claim 1, wherein the at least one surface is configured to be engaged by the patient biting the probe body.

13. The probe body of claim 1, wherein the at least one probe surface is defined by a material that deforms and introduces friction so as to temporarily affix the probe body relative to the oral object.

14. The probe body of claim 1, the reusable components of the measurement system including a transmission medium or a wireless system, wherein the casing fittingly receives the signal receiver to a predetermined position within the opening, the casing comprising a sheath receiving at least a portion of the transmission medium or the wireless system so as to maintain sterile separation between the reusable components and the mouth.

15. The probe body of claim 14, the transmission medium comprising an optical waveguide and the signal receiver comprising a distal end of the optical waveguide, wherein the sheath distally receives the waveguide.

16. The probe body of claim 15, further comprising a mirror disposed along an optical path between the window and the end of the optical waveguide.

17. The probe body of claim 16, further comprising a joint coupling the sheath to an oral object-receiving portion of the casing so as to allow movement therebetween.

18. The probe body of claim 1, further comprising a joint coupling at least a portion of the casing to the at least one probe surfaces.

19. The probe body of claim 14, the transmission medium comprising an electrical conductor and the signal receiver comprising a light detector circuit, the sheath receiving a portion of the conductor adjacent the light detector circuit.

20. The probe body of claim 14, the signal receiver of the oral health measurement system being coupled to an electromagnetic source of the oral health measurement system, wherein the casing receives the signal receiver and electromagnetic source therein.

21. The probe body of claim 14, the casing having a feature for engaging a surface of the oral health measurement system to position the signal receiver relative to the casing.

22. The probe body of claim 21, wherein the casing is frangible or permanently deformable adjacent the feature when the signal receiver is removed from the casing so as to inhibit re-use of the probe body.

23. The probe body of claim 22, further comprising at least one material that is difficult to sterilize.

24. The probe body of claim 1, further comprising at least one material that is difficult to sterilize.

25. The probe body of claim 1, wherein at least an outer surface of the probe body is sterilizable.

26. The probe body of claim 22, the oral health measurement system having a source of visible or non-visible light energy, and further comprising another window and another casing for receiving at least a portion of the energy source of the oral health measurement system.

27. The probe body of claim 1, the oral health measurement system having a source of visible or non-visible light energy coupled to a transmission medium, the transmission medium also directing the signal from the signal receiver to the processor, the signal receiver comprising an integrated signal receiver/energy transmitter, the opening of the probe body removably receiving at least a portion of the transmission medium adjacent the integrated signal receiver/energy transmitter.

28. The probe body of claims 27, further comprising a reflective surface, the oral object being disposed between the window and the reflector when the window is oriented to transmit the energy toward the oral object so that the reflector helps direct the energy back through the window and to the integrated signal receiver/energy transmitter.

47. An apparatus as claimed in claims 1, 29, or 39, wherein an outer surface of the probe body is defined by sterilizable material, and wherein the probe body is configurable for repeated attachment to and detachment from other system components.

48. An apparatus as claimed in claims 1, 29, and 39, wherein the probe body is not safely sterilizable.

11. The probe body of claim 11, wherein the probe body is configured so as to induce the movement of the body portions and engage opposed surfaces of at least one tooth when the patient bites the probe body.

29. A detachable probe body for use with a blood measurement system for tooth vitality measurements of a tooth within a mouth of the patient, the mouth having oral surfaces, the blood measurement system having reusable components including a light signal receiver coupled to a processor for evaluating a characteristic of blood from an electromagnetic signal, the probe body comprising:

a window capable of transmitting the light signal from the tooth to the signal receiver;

a casing extending from the window, the casing and window together defining an opening for receiving the signal receiver and at least a portion of the signal transmitter so as to provide isolation of the reusable components from the mouth; and

at least one surface oriented to engage one or more oral surfaces so as to maintain alignment between the signal receiver and the tooth.

30. The probe body of claim 29, wherein the at least one surface comprises a first probe surface region and a second probe surface region, the probe body receiving the tooth with the first and second surface regions, further comprising a biasing structure urging the first probe surface region toward the second probe surface region when the tooth is at a desired position therebetween so as to accommodate a range of differing teeth.

31. The probe body of claim 29, wherein the probe body comprises a first probe body portion having a first probe surface region and a second probe body portion having a second probe surface region, the first portion slidingly being urged toward the second region of the second portion when the tooth is received therebetween and the patient bites the probe body.

32. The probe body of claim 29, wherein the at least one surface is defined by a material that deforms so as to temporarily affix the probe body relative to the tooth.

33. The probe body of claim 29, wherein the casing fittingly receives the signal receiver to a predetermined position within the opening.

34. The probe body of claim 29, the blood measurement system including an optical waveguide and the signal receiver comprising a distal end of the optical waveguide, wherein the opening distally receives the waveguide.

35. The probe body of claim 29, the blood measurement system including an electrical conductor and the signal receiver comprising a light detector circuit, the opening receiving the light detector circuit and at least a portion of the conductor adjacent the light detector circuit.

36. The probe body of claim 29, the casing having a feature for engaging a surface of the blood measurement system to position the signal receiver relative to the casing, the casing being frangible or permanently deformable adjacent the feature when the signal receiver is removed from the casing so as to inhibit reuse of the probe body.

37. The probe body of claim 29, the blood measurement system having a light energy source and an energy transmission medium, and further comprising another window and another casing defining another opening for receiving the energy source and at least a portion of the energy transmission medium.

38. The probe body of claim 29, the blood measurement system having a light energy source and an energy transmission medium for directing energy to the tooth, the energy transmission medium also directing the signal from the signal receiver to the processor, the signal receiver comprising an integrated signal receiver/energy transmitter, the opening of the probe body receiving at least a portion of the transmission medium adjacent the integrated signal receiver/energy transmitter.

44. The oral health measurement system of claim 31, wherein the casing isolates the signal receiver from the mouth, and wherein the processor determines a health characteristic of the oral object in response to the light signal.

45. The oral health measurement system of claim 44, wherein the light source is modulated per a modulation sequence, and wherein the processor use the modulated sequence to determine the health characteristic.

46. The oral health measurement system of claim 45, wherein the light source generates light at a range of frequencies, and wherein the processor comprises a spectrometer module for determining the oral health characteristic from the light signal.

39. An oral health measurement system for measurements of oral object within a mouth of a patient, the mouth having oral surfaces, the measurement system comprising:

a measurement apparatus having a visible or non-visible light source, and having an electromagnetic signal receiver coupled to a processor;

a detachable probe body having;

a casing removably receiving the signal receiver,

a surface oriented to engage one or more oral surface so as to maintain alignment between the signal receiver and the oral object, and

at least one window disposed along an path extending from the source to the oral object and from the oral object to the receiver, the at least one window transmitting visible or non-visible light energy from the source to the oral object, and an optical signal from the oral object to the signal receiver.

40. The oral health measurement system of claim 39, wherein the measurement apparatus comprises at least one of a spectrophotometer, a pulse oximeter, and a laser Doppler system.

41. The oral health measurement system of claim 40, wherein the electromagnetic source comprises a laser or light emitting diode generating light at a first frequency, and wherein the blood flow measurement apparatus includes a pulse oximeter module that produces blood oxygenation signals in response to light at the first frequency and light at a second frequency, and a laser Doppler module that produces blood flow signals in response to light at the first frequency.

42. The oral health measurement system of claim 39, wherein the detachable probe body comprises at least one mirror disposed along the optical path.

43. The oral health measurement system of claim 39, wherein the energy source generates visible or non-visible light energy at a plurality of frequencies, and, wherein the measurement apparatus comprises a spectrophotometer employing at least one of the frequencies, a pulse oximeter employing at least two of the frequencies, and a laser Doppler system employing at least one of the frequencies.

49. A method of measuring oral objecthealth, the method comprising:

covering a signal receiver with a detachable probe body;

affixing the signal receiver relative to an oral object with the probe body;

generating an oral object health characteristic signal by directing visible or non-visible light energy toward the oral object;

detecting the oral object health signal with the affixed signal receiver through a window of the probe body;

determining an oral object health characteristic by processing the detected oral object health signal with a processor coupled to the signal receiver.

50. The method of claim 49, further comprising removing the probe body from a mouth, removing the signal receiver from the probe body and disposing of the probe body, covering the signal receiver with another probe body, and affixing the signal receiver relative to another oral object in another mouth with the other probe body so as to avoid contamination of the other mouth when re-using the signal receiver.

51. The method of claim 49, wherein removing the signal receiver from the probe body comprises changing the probe body so as to inhibit reuse of the probe body.

52.