Dental handpiece system

Patent metadata

Field	Value
Publication number	US-2021401542-A1
Application number	US-202117325079-A
Country	US
Kind code	A1
Filing date	May 19, 2021
Priority date	Jun 26, 2020
Publication date	Dec 30, 2021
Grant date	—

Abstract

The purpose of the present invention is to enable safer treatment and to reduce variation of treatment effects in root canal treatment using a dental handpiece, regardless of operator's skill level. The present invention is a dental handpiece system including a handpiece and a rod-shaped cutting tool, in which the handpiece includes a handpiece body and a head part provided at a tip of the handpiece body, the rod-shaped cutting tool is rotatably attached to the head part of the handpiece and is used to cut a root canal, and the dental handpiece system detects at least one selected from the group consisting of a force applied to the handpiece from an external matter in an axial direction of the cutting tool and an acceleration of the handpiece in the axial direction of the cutting tool when cutting the root canal.

First claim

What is claimed is:

1 . A dental handpiece system comprising a handpiece and a rod-shaped cutting tool,
wherein the handpiece comprises a handpiece body and a head part provided at a tip of the handpiece body, the rod-shaped cutting tool is rotatably attached to the head part of the handpiece and is used to cut a root canal of a tooth, and the dental handpiece system detects at least one selected from the group consisting of a force applied to the handpiece from an external matter in an axial direction of the cutting tool and an acceleration of the handpiece in the axial direction of the cutting tool when cutting the root canal.

2 . The dental handpiece system of claim 1 , further comprising an adjustment mechanism capable of adjusting a distance between the handpiece and the tooth to be treated,
wherein the adjustment mechanism adjusts the distance between the handpiece and the tooth to be treated according to at least one selected from the group consisting of the force applied to the handpiece from the external matter and the acceleration of the handpiece when cutting the root canal.

3 . The dental handpiece system of claim 2 , wherein the adjustment mechanism detects the force applied to the handpiece from the external matter.

4 . The dental handpiece system of claim 2 , wherein at least part of the adjustment mechanism is configured to contact with the tooth to be treated.

5 . The dental handpiece system of claim 4 , further comprising an elastic stopper being externally and movably mounted on the cutting tool in the axial direction of the cutting tool,
wherein at least part of the adjustment mechanism is configured to contact with the tooth to be treated via the stopper, and the adjustment mechanism adjusts the distance between the handpiece and the tooth to be treated, by moving the stopper in the axial direction of the cutting tool.

6 . The dental handpiece system of claim 1 , further comprising an imparting means for imparting a rotational driving force to the cutting tool,
wherein the rotational drive force is adjusted according to at least one selected from the group consisting of the force applied to the handpiece from the external matter and the acceleration of the handpiece, when cutting the root canal.

7 . The dental handpiece system of claim 6 , wherein the rotational driving force is linked to the distance between the handpiece and the tooth to be treated.

8 . The dental handpiece system of claim 2 , further comprising a storage means and a control means for controlling at least one of the adjustment mechanism and the imparting means,
wherein the storage means prestores one or more optimal values of at least one selected from the group consisting of the force applied to the handpiece from the external matter, the acceleration of the handpiece, the distance between the handpiece and the tooth to be treated, and the rotational driving force, according to a desired movement of the handpiece by an operator with a higher skill level for root canal treatment, and the control means continuously controls at least one of the adjustment mechanism and the imparting means so that at least one selected from the group consisting of the force applied to the handpiece from the external matter, the acceleration of the handpiece, the distance between the handpiece and the tooth to be treated, and the rotational driving force is optimized based on the one or more optimum values read from the storage means, to support the movement of the handpiece.

9 . A stopper member,
wherein the stopper member is used in a dental handpiece system comprising a handpiece and a rod-shaped cutting tool, the handpiece comprises a handpiece body and a head part provided at a tip of the handpiece body, the rod-shaped cutting tool is rotatably attached to the head part of the handpiece and is used to cut a root canal, the stopper member is placed between a tooth to be treated and the head part, the stopper member is elastic, and a length of the cutting tool in the axial direction thereof can be adjusted in the placement of the cutting tool.

10 . The stopper member of claim 9 , wherein the length of the cutting tool in the axial direction thereof can be adjusted according to a displacement of the cutting tool.

11 . The stopper member of claim 9 , wherein the length of the cutting tool in the axial direction thereof can be adjusted by stacking the stopper members to each other in the axial direction of the cutting tool.

Assignees

• Mani Inc

Inventors

• Matsutani Kazuhiko

Classifications

• A61C5/40 Primary

  Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots · CPC title

• A61C3/02

  Tooth drilling or cutting instruments; Instruments acting like a sandblast machine · CPC title

• A61C5/44 Primary

  Means for controlling working depth, e.g. supports or boxes with depth-gauging means, stop positioners or files with adjustably-mounted handles · CPC title

• A61C19/041

  for measuring the length of the root canal of a tooth · CPC title

• A61C5/42

  Files for root canals; Handgrips or guiding means therefor · CPC title