DENTAL HANDPIECE ATTACHMENT

Abstract

The present invention relates to a contra-angle dental handpiece attachment (100) for a device (200) for driving an endodontic file (1000) and for operating a remote pump (700).

Claims

1-15. (canceled)

16. A contra-angle dental handpiece attachment for a device for driving an endodontic file and for operating a remote pump, the contra-angle dental handpiece attachment comprising an elongated housing made of radiolucent plastics, the elongated housing comprises a generally hollow handle portion, a shank portion being connected to the handle portion, and a head portion being connected to the shank portion, wherein the handle portion is designed to enclose at least partially the device and configured to form a detachable form-fit connection with the device; wherein the handle portion is configured to not interfere with electromagnetic components of the device, including a transmitter and/or an antenna and/or an rotatable magnetic holding means of the device; wherein a drive arrangement made of plastics is mounted in the shank portion, the drive arrangement comprising a file shaft for driving the endodontic file, an eccentric shaft being coupled to the file shaft and a crown gear shaft being coupled to the eccentric shaft, wherein a crown gear of the crown gear shaft protrudes in the handle portion and is positioned to rotatably couple to a gear for driving the endodontic file of the device; wherein the head portion comprises a chuck for receiving an endodontic file; wherein the elongated housing further comprises a through-conduit for delivering an irrigation solution to a tooth root canal, the through-conduit having a proximal end extending beyond the handle portion that is configured to establish a fluid communication with a reservoir and a distal end at the head portion where the endodontic file is placed; wherein the elongated housing further comprises a through-conduit for sucking an irrigation solution from a tooth root canal, the through-conduit having a proximal end extending beyond the handle portion that is configured to establish a fluid communication with a remote pump remotely operated by the device and a distal end at the head portion configured for establishing a fluid communication with an area of the tooth root canal from which the irrigation solution may be removed.

17. The contra-angle dental handpiece attachment according to claim 16, wherein the handle portion of the housing has a thickness of at least 2 mm.

18. The contra-angle dental handpiece attachment according to claim 16, wherein the shank portion of the housing has a thickness of at least 4 mm.

19. The contra-angle dental handpiece attachment according to claim 16, wherein the crown gear of the crown gear shaft is configured to rotatably couple in a shaft angle between 160 and 180 to the gear for driving the endodontic file.

20. The contra-angle dental handpiece attachment according to claim 16, wherein the contra-angle dental handpiece attachment is a single-use contra-angle dental handpiece attachment.

21. The contra-angle dental handpiece attachment according to claim 16, wherein the drive arrangement is fixed in a sealed manner in the shank portion of the elongated housing.

22. The contra-angle dental handpiece attachment according to claim 16, wherein the drive arrangement comprises a radial fastening projection and an elastic V-ring having an elastically enlarged diameter, wherein the elastic V-ring is positioned adjacent to the radial fastening projection and the drive arrangement is fixed by said radial fastening projection at a part of the inner wall of the shank portion that is tapered towards the handle portion.

23. The contra-angle dental handpiece attachment according to claim 16, wherein the drive arrangement is made of polyoxymethylene acetal copolymer and/or polyetheretherketone.

24. The contra-angle dental handpiece attachment according to claim 16, wherein the handle portion of the housing comprises a solid protrusion on the inside as a stop for positioning the device.

25. The contra-angle dental handpiece attachment according to claim 16, wherein the through-conduit for delivering an irrigation solution to a tooth root canal and the through-conduit for sucking an irrigation solution from a tooth root canal are arranged parallel and adjacent to each other.

26. The contra-angle dental handpiece attachment according to claim 16, wherein a part of the handle portion of the elongated housing is designed as an elastic snap element for forming a detachable non-rotatable form-fit connection with the device and wherein said snap element is located opposite to the proximal end of the through-conduit for delivering an irrigation solution to a tooth root canal and the proximal end of the through-conduit for sucking an irrigation solution from a tooth root canal.

27. The contra-angle dental handpiece attachment according to claim 16, wherein the head portion further comprises a push-button for dismounting the endodontic file.

28. The contra-angle dental handpiece attachment according to claim 16, wherein the housing is made of acrylonitrile butadiene styrene or polycarbonate.

29. The contra-angle dental handpiece attachment according to claim 16, wherein the drive arrangement comprises a clutch mechanism, which disables a reciprocating movement of the endodontic file when the movement of the endodontic file is restricted.

30. A dental device for shaping, flushing and suction a tooth root canal, the dental device comprising the contra-angle dental handpiece attachment according to claim 16 and a device attached to said contra-angle dental handpiece attachment.

Description

DESCRIPTION OF THE FIGURES

[0461] FIG. 1 shows a schematic representation of an embodiment of a dental device (1100) including a device (200) for driving an endodontic file (1000) and operating a remote pump (700), which is integrated in a contra-angle dental handpiece attachment (100) according to the invention. The attachment can comprise a file (1000), a tool holder in form of a chuck (135) and a drive arrangement (150).

[0462] FIG. 2 shows a longitudinal section of the attachment (100) according to the invention.

[0463] FIG. 3A shows the attachment (100) according to the invention equipped with an endodontic file (1000). The perspective shows an elastic snap element (112) at the handle portion (110).

[0464] FIG. 3B shows an embodiment of the eccentric shaft (170) of the attachment (100) according to the invention. The perspective shows a part of the clutch mechanism, which engages in and drives the file shaft (160) rotationally and vibrationally.

[0465] FIG. 4 shows the device (200). The perspective shows the gear (210) in form of a bevel gear (215).

[0466] FIG. 5 shows the longitudinal section of the device (200).

[0467] FIG. 6 shows an explosion view of the rotator part (202).

[0468] FIG. 7 shows an embodiment of the printed circuit board (500).

[0469] FIG. 8 shows a schematic view of an exemplary coil (510) in square wave pattern printed on the circuit board (500). B refers to the center line of the coil. A represents closest distance between the center line and the square wave pattern and P represents the length of each segment of the square wave pattern.

REFERENCE SIGNS

[0470] 10 tooth root canal [0471] 100 contra-angle dental handpiece attachment [0472] 101 elongated housing [0473] 102 through-conduit for delivering an irrigation solution to a tooth root canal (500) [0474] 103 proximal end of through-conduit (102) [0475] 104 distal end of through-conduit (102) [0476] 105 a through-conduit ( ) for sucking an irrigation solution from a tooth root canal (500) [0477] 106 proximal end of through-conduit (105) [0478] 107 distal end of through-conduit (105) [0479] 108 port for establishing fluid communication with a remote pump and a reservoir [0480] 110 handle portion [0481] 111 solid protrusion [0482] 112 elastic snap element [0483] 120 shank portion [0484] 121 part of the wall tapered towards the handle portion (110) [0485] 130 head portion [0486] 131 push-button for dismounting the endodontic file [0487] 132 spring [0488] 133 spring cup [0489] 135 chuck [0490] 150 drive arrangement [0491] 151 radial fastening projection [0492] 152 elastic O-ring [0493] 160 file shaft for driving the endodontic file [0494] 170 eccentric shaft [0495] 180 crown gear shaft [0496] 181 crown gear [0497] 200 device for driving an endodontic file and for operating a remote pump [0498] 201 housing [0499] 202 rotator part [0500] 210 gear [0501] 215 steel bevel gear [0502] 220 gear shaft [0503] 230 bearing [0504] 240 bearing spacer [0505] 250 sleeve [0506] 260 securing cup [0507] 270 spring [0508] 280,285 pin [0509] 290 adapter [0510] 300 magnet holding means [0511] 305 magnetic separator [0512] 310 magnet [0513] 410 first cylindrical holding means [0514] 450 second cylindrical holding means [0515] 500 printed circuit board [0516] 510 coil [0517] 520 central processing unit [0518] 530 inner encoder [0519] 550 transmitter [0520] 560 antenna [0521] 570 DC-DC converter [0522] 580 electrical circuit housing [0523] 600 motorized power handle [0524] 700 remote pump [0525] 750 reservoir [0526] 800 battery [0527] 810 rechargeable battery [0528] 850 battery connection [0529] 860 capacitor [0530] 870 capacitor charger [0531] 880 capacitor connection [0532] 900 battery charger [0533] 950 outer ring [0534] 1000 endodontic file [0535] 1100 dental device