Чернов Андрей Владимирович (RU),Мурдасов Сергей Евгеньевич (RU),Кобызев Андрей Евгеньевич (RU),Шестернин Александр Сергеевич (RU),Гатауллин Асхат Таирович (RU),Губин Александр Вадимович (RU)
申请号：
RU2016103447/14
公开号：
RU00163628U1
申请日:
2016.02.02
申请国别(地区):
RU
年份:
2016
代理人:
摘要：
The utility model relates to medicine and can be used in neurosurgery, orthopedics, traumatology, Spine, in particular in the field of spinal correction and fixation systems. Transpedicular polyaxial screw comprises a screw shaft (1) and a head (2). a screw shaft (1) is formed at one end with a thread (3) on the working part, and at the other end with a spherical thickening (4). The head (2) provided with a through hole (5) to be mounted to the upper part of the through hole (5) having an inner abutment thread (6) and locking screw (7). At the bottom of the through hole (5) taken by the spherical thickening (4) of the screw shaft (1) and a groove (8) for mounting therein of the longitudinal rod (9). The spherical thickening (4) of the screw shaft (1) in its place of contact with a longitudinal rod (9) is formed with a notch (10). The notch (10) may be formed in a concentric or spiral cuts. The thread profile (3) of the working part of the screw shaft (1) and AC represents a scalene trapezium (11), wherein the trapezoid base (11) decreases from a spherical thickening (4) of the screw shaft (1) to its tip (12). The angles of 13.1 and 13.2 scalene trapezium (11) of the thread profile (3) of the working part of the screw shaft (1), in particular, are 5 ° and 40 °. At least the first from the tip (12) of the screw rod (1) thread turn (3) is provided with a recess (14) forming flute with cutting edges. The outer diameter of the working part of the screw shaft (1) is constant, and the inner - is reduced by a spherical thickening (4) to the tip (12) to form the conical core (15), the screw shaft (1). The conical core (15), the screw shaft (1) is made to form two parts (15.1) and (15.2) of different taper transition audio portion (15.1) to another (15.2) and with decreasing angle forming a conical end portion (15.2) tapered core (15). a screw shaft (1) is pivotable relative to the head (2) and its spherical thickening (4) comprises a member (16), allowing to create torque re
