Liquid injection needle for jetting a liquid in a predetermined angle range and method of producing the same

A technology of injection needles and angle ranges, which is applied in the field of liquid injection needle components, and can solve difficult problems such as treatment
CN1839772AInactive Publication Date: 2006-10-04MATSUMOTO DENTAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
MATSUMOTO DENTAL UNIVERSITY
Publication Date
2006-10-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A cannula (21) has a front part (21 c) in a direction of a center axis X with its forward end portion (23) closed. The front part has a plurality of nozzle orifices (24, 25, 26) each of which has an orifice axis Y intersecting the center axis X. Each of the nozzle orifices has a first diameter in a first direction parallel to the center axis X and a second diameter in a second direction perpendicular to the first direction. The first diameter ranges between 0.1 mm and 0.5 mm while the second diameter ranges between 0.1 mm and 0.3 mm so that a liquid in the cannula is jetted from the nozzle orifices in an angle range of 45 degrees towards the forward end portion with respect to the orifice axis.
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Description

technical field

[0001] The present invention relates to a liquid injection needle element capable of ejecting liquid inside a cannula or needle tube to the outside of the cannula and a method of manufacturing such an element. Background technique

[0002] During dental experiments or treatments, it is often necessary to grind teeth. After grinding a tooth, grinding debris left around the tooth sometimes gets into the small gaps at the bottom of the tooth or inside the root canal of the tooth. Those abrasive debris are removed by spraying a liquid (rinse) from the cannula.

[0003] In dentistry, cannulas are also used in the treatment of periodontal disease. In this case, the tip portion of the cannula is inserted into the affected part of the periodontal disease, that is, the periodontal pocket (space between the tooth and the gum), and the liquid is sprayed from the cannula.

[0004] Japanese Examined Patent Publication (JP-B) No. H06-73530 (Patent Document 1) (correspon...

Claims

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