Anti-microbial apparatus and method for dental handpieces

• US 5,407,354 A
• Filed: 12/03/1993
• Issued: 04/18/1995
• Est. Priority Date: 12/03/1993
• Status: Expired due to Fees

• Current Assignee: Gull Laboratories, Inc. (Meridian Bioscience, Inc.)
• Original Assignee: Gull Laboratories, Inc. (Meridian Bioscience, Inc.)
• Inventors: Fife, Richard K.
• Primary Examiner(s): O'Connor, Cary E.
• Application Number:
  US08/162,682
• Time in Patent Office: 501 Days
• Field of Search: 433/32, 433/104, 433/116, 604/163, 604/171, 604/263, 206/363, 206/364, 206/368, 206/369, 206/438, 206/439, 206/635, 422/20, 422/28, 422/300, 422/292, 422/307
• US Class Current: 433/116
• CPC Class Codes: A61C 1/16 Protecting caps for hand-pieces or angle-pieces

Abstract

A multiple stage anti-microbial apparatus and methods are disclosed, which provide capacity to process a handpiece between patients including soaking, de-overburdening via use of ultrasonic energy, treating with exposing to anti-microbial heat, accommodating coordinated though separate autoclaving, and accommodating contiguously packaging in a heat shrunk sheath after multiple anti-microbial treatment to prevent later contamination through the air. The distal portion of the heat shrunk sheath is initially removed along weakened paths to expose the operative head of the handpiece, accommodating grasping of the handpiece handle through the remainder of the sheath during use of the handpiece on the patient. After such use, the remainder of the sheath is removed along a weakened path and discarded.

The anti-microbial apparatus comprises a portable casing with one or more exterior lids or covers. An ultrasonic basin provides a bath for soaking, liquid anti-microbial activity and removal of debris. A heat chamber accommodates facile manual introduction and movement therein of the distal end and a substantial portion of the handle of the handpiece, following the bath treatment, to dry and expose the handpiece to anti-microbial heat and anti-contamination sheath upon the handpiece.

Claims

1. An anti-contamination sheath for a medical or dental handpiece comprising a flexible bag comprising a thin wall of synthetic resinous material closed at one end and opened at another end, the bag comprising perforations in the wall accommodating manual tearing of the bag along the perforations to accommodate removal of at least part of the bag from the handpiece;

the sheath further comprising two tabs, respectively disposed at the two ends of the sheath.

2. An anti-contamination sheath for a medical or dental handpiece comprising a flexible bag comprising a thin wall of synthetic resinous material closed at one end and opened at another end, the bag comprising perforations in the wall accommodating manual tearing of the bag along the perforations to accommodate removal of at least part of the bag from the handpiece;

some perforations being longitudinally aligned and others being transversely aligned creating bag segments which can be individually selectively manually removed to expose a distal end and a main body of the handpiece, respectively.

3. A sheath according to claim 2 wherein at least one bag segment is color coded.

4. A sheath according to claim 2 further comprising a tab disposed at least one end of the bag aligned generally with the longitudinal perforations.

5. An anti-contamination sheath for dental and medical handpieces comprising a thin wall elongated pliant sleeve of heat shrinkage synthetic resinous material into which one handpiece is manually placed comprising at least one weakened line accommodating manual tearing of the material after being heat shrunk upon the handpiece along the weakened line for removal of at least part of the bag from the handpiece, the material of the bag comprising at least two weakened lines to accommodate separate manual removal of two segments of the bag from the handpiece.

6. In combination handpiece and an anti-contamination sheath contiguously encapsulating a distal end and a main body of the handpiece, the sheath comprising a pliant bag comprising a thin wall of heat shrunk synthetic resinous material closed at one end, the material of the bag comprising at least one weakened wall portion accommodating manual tearing of the wall along the weakened wall portion for removal of at least part of the bag from the handpiece.

7. The combination of claim 6 wherein the wall of the bag comprises at least two weakened lines to accommodate selective independent manual removal of two segments of the bag from the handpiece.

8. A unitary anti-microbial apparatus comprising:

(a) a basin for soaking a distal end and at least part of a handle portion of a used handpiece in liquid to (1) prevent drying of debris derived from use in an oral cavity of a patient, and (2) for exposure of the immersed parts of the handpiece to an anti-microbial agent in the liquid;

(b) a source of ultrasonic waves associated with the basin for removing the debris and enhance the disinfection;

(c) a heat chamber accommodating receipt of the distal end and the at least part of the handle of the handpiece after removal thereof from the basin to (1) dry, (2) expose the same to anti-microbial heat, and (3) to accommodate heat shrinking of a plastic sheath contiguously upon and around the distal end and at least some portion of the handle of the handpiece.

9. The unitary anti-microbial apparatus according to claim 8 further comprising a supply of plastic sheaths.

10. The unitary anti-microbial apparatus according to claim 9 wherein each sheath is heat shrinkable and closed at one end.

11. The unitary anti-microbial apparatus according to claim 8 further comprising a supply of disposable towels.

12. The unitary anti-microbial apparatus according to claim 8 further comprising controls and circuitry for the ultrasonic and the heat chamber for anti-microbial and heat shrink purposes.

13. The unitary anti-microbial apparatus according to claim 8 wherein the heat chamber comprises a tube into which the handpiece is manually inserted and manually held for anti-microbial and heat shrink purposes.

14. The unitary anti-microbial apparatus according to claim 8, the apparatus comprising a housing comprising a base and at least one cover.

15. The unitary anti-microbial apparatus according to claim 14 wherein the base and cover are connected by a hinge.

16. The unitary anti-microbial apparatus according to claim 8 wherein the basin comprises a removable lid with at least one opening therein through which the handpiece may be inserted into the liquid in the basin.

17. The unitary anti-microbial apparatus according to claim 8 wherein the heat chamber comprises an exhaust site, the apparatus further comprising an exhaust baffle juxtaposed the exhaust site to inconsequentially dissipate the exhaust.

18. The unitary anti-microbial apparatus according to claim 8 wherein a heat source is juxtaposed the heat chamber such that hot air is caused to flow through the heat chamber as laminar flow.

19. The unitary anti-microbial apparatus according to claim 8 further comprising surgical type rubber gloves.

20. The unitary anti-microbial apparatus according to claim 8 wherein the heat chamber comprises glazed heat resistant material.

21. The unitary anti-microbial apparatus according to claim 8 wherein the apparatus comprises a counter-top cabinet.

22. The unitary anti-microbial apparatus according to claim 8 wherein the apparatus is portable, pumpless, and drainless.

23. A method of subjecting a handpiece of the dental/medical type to multiple consecutive anti-microbial treatments comprising the steps of:

soaking a distal end and at least some of a handle of the handpiece in liquid after use;

immersing the distal end and at least a portion of the handle of the handpiece in art anti-microbial liquid agent;

subjecting the distal end and at least part of the handle of the handpiece immersed in liquid to ultrasonic waves;

exposing the distal end and a length of the handle of the handpiece to anti-microbial heat for a predetermined period of time;

removing the handpiece from the anti-microbial heat and thereafter encapsulating the distal end and at least some of the handle of the handpiece in a pliant sheath of synthetic resinous film material;

heat shrinking the sheath into snug contiguous relation with the handpiece;

removing the heat shrunk sheath and handpiece from the heat; and

storing the sheathed handpiece for later use.

24. A method according to claim 23 further comprising the steps of removing and discarding at least a portion of the heat shrunk sheath from around the distal end of the handpiece and thereafter orally using the handpiece.

25. A method according to claim 23 further comprising the steps of removing and discarding a first portion of the heat shrunk sheath from around the distal end of the handpiece leaving a second portion of the heat shrunk sheath around the handle of the handpiece, manually gripping the handle through the second portion of the heat shrunk sheath while orally using the handpiece, removing and discarding the second portion of heat shrunk sheath from the handle and thereafter again repeating the steps of claim 23.

26. A method according to claim 25 wherein each removing step comprises manually severing said first and second portions of the heat shrunk sheath along weakened tear lines.

27. A method according to claim 23 wherein the exposing step is performed while a proximal end of the handpiece is hand held.

28. A method according to claim 23 wherein the heat shrinking step is performed while a proximal end of the handpiece is hand held.

29. A method according to claim 23 wherein the soaking, subjecting, and immersing steps are practiced in a common bath.

30. A method according to claim 23 wherein the exposing and heat shrinking steps take place at the same location.

31. A method according to claim 23 wherein the soaking step is preceded by creating a liquid bath comprising an anti-microbial agent and thereafter performing the soaking, subjecting, and immersing steps therein.

32. A method according to claim 31 wherein the soaking, subjecting, and immersing steps are practiced below a removable lid disposed over the bath.

33. A method according to claim 32 wherein the proximal end of the handpiece extends above the bath through an opening in the lid as the soaking, subjecting, and immersing are performed.

34. A method according to claim 23 where liquid is manually removed from the handpiece after the immersing step and prior to the exposing step.

35. A method according to claim 23 further comprising aspirating spent liquid used in performing at least one of the soaking, subjecting, and immersing steps through a dental suction tube.

36. A method according to claim 23 further comprising manually manipulating controls to accommodate the subjecting, exposing, and heat shrinking steps.

37. A method according to claim 23 wherein the removing step comprises manually severing at least a portion of the heat shrunk sheath along a weakened tear line.

38. A method according to claim 23 wherein the exposing and heat shrinking steps are performed in a hollow, heat-insulated heat chamber.

39. A method according to claim 23 wherein the handpiece is manually displaced during the exposing and heat shrinking steps.

40. A method according to claim 23 wherein the heat shrinking step causes substantially all of the handpiece to be contiguously encapsulated within the sheath.

41. A method according to claim 33 wherein the exposing step comprises causing hot air of a predetermined temperature to be displaced as laminar flow along a confined chamber.

42. A method according to claim 33 comprising the further step of rinsing the distal end and a segment of the handle of the handpiece prior to the exposing step.

43. A method according to claim 33 wherein the soaking, immersing, and subjecting steps are performed with the handpiece connected for normal operation.

44. A method according to claim 43 comprising the further step of displacing one or more actuator fluids through the handpiece immediately prior to the exposing step.

45. A method according to claim 43 comprising the further step of disconnecting the handpiece from its normal operational connection after the subjecting step.

46. A method according to claim 23 further comprising the step of lubricating the handpiece prior to the heat shrinking step.

47. A method according to claim 23 wherein the soaking, immersing, and subjecting steps are performed in a drainless liquid bath of predetermined quantity and comprising the further step of vacuum aspirating all liquid comprising the liquid.

48. A method according to claim 47 wherein the mixing step comprises combining the concentrated disinfectant with a container of water and placing a known amount of the mixing in a basin.

49. A method according to claim 23 comprising the step of creating a liquid bath of predetermined quantity by mixing a concentrated disinfectant with water of a known quantity.

50. A method according to claim 23 wherein the soaking, immersing, and subjecting steps are performed in a drainless anti-microbial bath and comprising the step of selectively testing the bath to determine its anti-microbial strength.

51. A method according to claim 23 wherein the exposing step comprises subjecting the entire handpiece to anti-microbial treatment.

52. A method according to claim 23 wherein the exposing step comprises first drying the handpiece at one site and then subjecting the entire handpiece to anti-microbial treatment at another site.

53. A method according to claim 23 wherein the exposing and heat shrinking steps are performed at the same site.

54. A method according to claim 53 wherein the same site comprises a relatively small continuously open heat chamber.

55. A method according to claim 53 wherein the same site comprises an elongated tubular heat chamber.

56. A method according to claim 53 comprising a further step of selectively setting different temperatures at the same site for the exposing and heat shrinking steps, respectively.

57. An anti-contamination method for a handpiece used upon the human body comprising the steps of:

subjecting the handpiece to at least one anti-microbial treatment;

placing the treated handpiece through an opening in a heat shrinkable sheath closed at one end;

heat shrinking the sheath into snug contiguous encapsulating relation with the distal end and at least part of a handle portion of the handpiece;

storing the handpiece in an atmospherically exposed environment for a period of time whereby the encapsulated handpiece remains free from contamination.

58. A method according to claim 57 comprising the further steps of:

removing and discarding at least some of the sheath at least from the distal end of the handpiece immediately prior to use.

59. A method according to claim 57 comprising the further steps of:

removing and discarding only a portion of the sheath encapsulating the distal end of the handpiece;

grasping the handle portion of the handpiece through a remainder of the sheath;

using the handpiece;

following the using step, removing and discarding the remainder of the sheath;

subjecting the fully unsheathed and used handpiece to at least one anti-microbial treatment.

60. A method of administering multiple anti-microbial treatments to a handpiece of a dental/medical type between successive uses thereof, comprising the steps of ultrasonically separating debris from the handpiece;

exposing at least some of the handpiece to an anti-microbial liquid;

applying anti-microbial heat to at least a portion of the handpiece;

enveloping at least a part of the handpiece in a plastic sleeve which is substantially impervious to microbials.

61. A portable anti-microbial apparatus by which a contaminated handpiece is treated comprising:

a housing;

an ultrasonic and anti-microbial liquid immersion compartment within the housings;

a heat applying compartment within the housing for selective application of anti-microbial heat and heat for a plastic shrinkage purpose, respectively, controls.