Patent ID: 8303299

Claim:
An orthodontic implant structure comprising: an upper structure body ( 10 - 16 ) having a through hole ( 10 e , 11 d ); a pair of bolts ( 2 , 2 A, 2 B) to be embedded in the jaw, of which each bolt having a head thread portion ( 21 ) provided at one end side in the lengthwise axial direction of the bolt, a locking portion ( 22 ), an engaging portion ( 23 ), and an embedding thread portion ( 24 ) at the other end side in the lengthwise axial direction of the bolt, in this order; a base plate ( 3 , 6 ) that has a projecting thread portion ( 31 , 61 ) which can penetrate through the through hole ( 10 e , 11 d ) and a first locking hole ( 32 , 62 ) and a second locking hole ( 33 , 63 ), with each of the first locking hole ( 32 , 62 ) and the second locking hole ( 33 , 63 ) capable of allowing penetration of the head thread portion ( 21 ) and the locking portion ( 22 ) of each bolt ( 2 , 2 A, 2 B), not capable of allowing penetration of the engaging portion ( 23 ), and engageable with the locking portion ( 22 ) to block rotation of the locking portion ( 22 ) about the lengthwise axial line; a first screwing member ( 4 , 4 A, 4 B) that can be screwed onto either one of the head thread portions ( 21 ); and a second screwing member ( 5 ) that can be screwed onto the projecting thread portion ( 31 , 61 ), wherein the second locking hole ( 33 , 63 ) of the base plate ( 3 ) is an elongated hole that is longer in the lengthwise axial direction of the base plate ( 3 ) than the greatest dimension of the locking portion ( 22 ) of each bolt, one of the locking portions ( 22 ) of the pair of bolts ( 2 , 2 A, 2 B) is configured to be engageable with the first locking hole ( 32 , 62 ) of the base plate ( 3 ), the other of the locking portions ( 22 ) of the pair of bolts ( 2 , 2 A, 2 B) is configured to be engageable with the second locking hole ( 33 , 63 ) of the base plate ( 3 ) so as to be relatively movable in a lengthwise direction of the base plate ( 3 ), the first screwing members ( 4 , 4 A, 4 B) is screwed onto one of the head thread portions ( 21 ), and the through hole ( 10 e , 11 d ) of the upper structure body ( 10 - 16 ) is fitted over the projecting thread portion ( 31 ) of the base plate ( 3 ), and the second screwing member ( 5 ) is screwed onto the projecting thread portion ( 31 ).