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公开(公告)号：JP2000014680A
公开(公告)日：2000-01-18
申请号：JP21848898
申请日：1998-06-26
申请人： SHO KEII
发明人： SHO KEII
摘要： PROBLEM TO BE SOLVED: To dispense with an auxiliary tool and reduce an error in measurement accuracy and a bacterial infection pathway in root canal treatment by providing a bar-like body and a scale for measuring the length of a blade part inserted in the pulp root canal of a tooth on the cutting blade. SOLUTION: A reamer file has a handle part 1 and a blade part, and the blade part is formed by a bar-like body with a scale 8 and a cutting blade 3. In this case, the reamer file is inserted in the pulp root canal 7 of a tooth 9. The scale 8 visually confirmed from the outside of the pulp root canal 7 is read to measure the insert length into the pulp root canal 7. In measurement, direct measurement can be made to reduce the probability of bacterial infection due to contact and decrease a measurement error.
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公开(公告)号：JPH10155811A
公开(公告)日：1998-06-16
申请号：JP33635097
申请日：1997-11-20
摘要： PROBLEM TO BE SOLVED: To provide a dental reamer which eliminates the possibility of damaging the spiral part at the front end under rotation. SOLUTION: The dental reamer 2 having the thinned front end 1 has spiral grooves on the surface inclusive of sharp cutting edges for reamer finishing of the root canal of a tooth. The cutting conditions are regulated by the rake angle α formed by the plane perpendicular to the plane to be cut in a cutting section and a rake plane and the relief angle β formed by the plane PC to be cut and the relief plane. The valves of the rake angle α and the relief angle 'are respectively >=0 deg.. The front end 1 has the cross-section of a shape slightly curved in the direction along the cutting edges.
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公开(公告)号：JPH1085243A
公开(公告)日：1998-04-07
申请号：JP26118196
申请日：1996-09-11
申请人： GC KK
发明人： SATO MASANORI , TANIJI HIROSHI
摘要： PROBLEM TO BE SOLVED: To achieve miniaturization by enabling the working lengths of the needles of numerous dental root canal forming instruments to be rapidly set at the same length, and enabling the needles to be preserved (aligned) in order in a line. SOLUTION: A plurality of through holes 1b through which the needle parts of dental root canal forming instruments can be passed are bored in a straight line in the upper surface 1a of an upper base to which the lower surface of a rubber stopper abuts, the upper base 1 constituting at least a portion of the upper surface of a casing 2 taking the form of a rectangular solid. A lower base 3 having an upper surface 3a which is parallel to the upper surface la of the upper base 1 and to which the end of the needle part of each dental root canal forming instrument abuts is supported by two or more supports 4, 5 being perpendicular to the upper surface 1a of the upper base 1 and placed parallel to each other inside the casing 2, and an internal thread 3b cut in the lower babe 3 is fitted over an external thread 4b cut on the outer peripheral surface of the rotating support 4 freely rotationally attached to the casing 2.
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公开(公告)号：JP2664011B2
公开(公告)日：1997-10-15
申请号：JP681693
申请日：1993-01-19
申请人： EGAWA KK
发明人： NONOMURA TOMOSUKE
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公开(公告)号：JPH09253092A
公开(公告)日：1997-09-30
申请号：JP17036596
申请日：1996-06-28
申请人： MAILLEFER INSTR SA
摘要： PROBLEM TO BE SOLVED: To provide a method for surely and efficiently drilling the root canal of tooth and a set of appliances. SOLUTION: The conicity of the rear part exceeding the diameter D9 of the appliances (1a to 1e) of the set of the appliances is larger in the preceding appliances than in the succeeding appliances of the set. On the other hand, the conicity in the front part of the appliances of the set is hardly increased in the preceding appliances of the set and is increased only in the succeeding appliances. If the appliances of the set are continuously used in such constitution, a dentist is able to bore the crown part of the tooth first, then the intermediate part and finally the peak end part with holes. The ends of the appliances between the pointed ends of the appliances and the point of the diameter D3 existing at 3mm from the pointed ends have one or plural grooves for removing the scrap of the dental root. Sharp edges are eliminated of these edges so that these parts of the appliances are helpful for only for guiding the appliances.
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公开(公告)号：JPH09248311A
公开(公告)日：1997-09-22
申请号：JP8726896
申请日：1996-03-14
申请人： MORITA MFG
发明人： YOSHIDA MASANOBU , MATOBA KAZUNARI
摘要： PROBLEM TO BE SOLVED: To enable the automation of work by a root canal forming device and to improve safety and operability by providing this root canal forming device with an automatic feeder for automatically moving the reference position of a cutting tool for a holder in the axial direction of this cutting tool. SOLUTION: A dentist slightly inserts the front end of a file 2 into the dental crown part 1c of the root canal 1a after setting various conditions by a setting section 14, then fixes a handpiece 4 in this states and treads a food pedal 9. A root canal measuring circuit 13 is then operated. When the insertion of the file 2 into the root canal 1a is checked from the measured impedance response value, a motor 6a for cutting and a motor 7a for feeding start rotating and the file 2 is inserted at a specified speed into the root canal 1a while the file 2 executes cutting. When the measured data of the root canal length attains a set value, the motor 7a for feeding is rotated in a backward direction and the file 2 is returned toward the dental crown part 1c. The cutting operation is stopped as well and the measured data of the root canal length is displayed on a display 15.
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