Patent ID: 8690567

Claim:
An adjustable orthodontic bracket-positioning device, comprising an adjustable bracket-positioning jig ( 38 ); a positioning vernier ( 41 ); and a dental crown vernier ( 42 ), wherein the adjustable bracket-positioning jig ( 38 ) comprises a sliding base ( 1 ) with a slideway ( 24 ); a height adjustment device ( 40 ) comprised of a slide block ( 14 ) fixed on the sliding base ( 1 ), and an angle adjustment device ( 39 ) fixed to the sliding base through a bracket; the sliding base ( 1 ) and the slide block ( 14 ) are connected through internal screw threads ( 25 ) in a threaded rod ( 2 ) and the sliding base ( 1 ), so that a position relation between the sliding base and slide block is capable of being adjusted; a driving wheel ( 21 ) in a driving wheel groove ( 22 ) near a height adjustment button ( 15 ) at one end of the threaded rod ( 2 ), the driving wheel is capable of pushing the slide block to move back and forth along the sliding base; the angle adjustment device ( 39 ) comprises a shaft ( 8 ) going through a shaft sleeve ( 16 ), with a positioning needle knife ( 4 ) at one end of the shaft; a stop sheet ( 10 ) fixed on a stop pin against one end of the shaft sleeve ( 16 ); a dial ( 12 ) fixed at the other end of the shaft sleeve ( 16 ); an angle needle ( 11 ) fixed at the shaft ( 8 ) at an area against the dial ( 12 ); an angle adjustment button ( 13 ) fixed at the other end of the shaft ( 8 ); an upper surface of the shaft sleeve ( 16 ) is fixed horizontally in a middle part of a stand ( 17 ); a V-shaped reference line stand ( 7 ) comprising two arms, wherein ends of the two arms are respectively fixed on the stand ( 17 ); a reference line ( 18 ) extending through a reference line hole ( 6 ) at the positioning needle knife ( 4 ) and a reference line aperture track ( 3 ) on the slide block ( 14 ); wherein one end of the reference line ( 18 ) is fixed on a top of the V-shaped reference line stand ( 7 ), and the other end of the reference line is fixed on a middle part of a front end surface of the sliding base ( 1 ) wherein the reference line is used as a reference line for positioning a MBT bracket; the dental crown vernier ( 42 ), for measuring a height of a clinical dental crown, comprises a main ruler ( 33 ) with a rectangular cross-section, extending through a secondary ruler ( 37 ) with a groove structure; the main ruler is provided with a reference stand ( 34 ) even with a zero graduation line of the secondary ruler ( 37 ); the secondary ruler ( 37 ) is provided with a bolt ( 36 ) for positioning the main ruler ( 33 ); the positioning vernier ( 41 ) comprises a main ruler ( 27 ) and a secondary ruler ( 26 ), both the main ruler and the secondary ruler comprise graduations and are capable of sliding up and down in relation with each other; a lower part of the secondary ruler ( 26 ) of the positioning vernier ( 41 ) is fixed on a base stand ( 31 ) of a groove shaped base ( 29 ), and a stop block is set in the groove shaped base.