CN213346181U - Ulna coronal process prosthesis installer - Google Patents
Ulna coronal process prosthesis installer Download PDFInfo
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- CN213346181U CN213346181U CN202021003416.6U CN202021003416U CN213346181U CN 213346181 U CN213346181 U CN 213346181U CN 202021003416 U CN202021003416 U CN 202021003416U CN 213346181 U CN213346181 U CN 213346181U
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Abstract
The utility model discloses an ulna coronal process prosthesis installer, which comprises a guide seat, a C-shaped fixed arm, a threaded sleeve, a positioning column drilling sleeve and a Kirschner wire sleeve, wherein the guide seat is connected with the threaded sleeve through threads so as to realize the height adjustment of the guide seat on the threaded sleeve; the bottom end of the positioning column drilling sleeve is detachably connected and locked with the bottom end of the threaded sleeve, and the bottom end of the Kirschner wire sleeve is detachably connected and locked with the lower end of the positioning column drilling sleeve; the top of C type fixed arm is provided with the locating piece, and the bottom of C type fixed arm is connected with the lateral wall of guide holder. The utility model discloses an ulna coronarism false body erector, simple structure, direction are accurate, convenient operation, can realize the location in the ulna coronarism false body installation comparatively smoothly, drilling and fixed operation etc. have solved this ulna coronarism false body's location, drilling and fixed mounting problem, provide a new choice for solving the treatment of patient's coronarism comminuted fracture.
Description
Technical Field
The utility model relates to the technical field of medical equipment, concretely relates to ulna coronaria prosthesis erector.
Background
Ulna coronal process comminuted fracture is one of the common diseases of elbow joint part, the ulna coronal process prosthesis device developed by Beijing Poistan lake hospital and Zhejiang medical instruments GmbH jointly, including a coronal process prosthesis, an ulna implantation bolt and a locking screw, wherein the lower part of the coronal process prosthesis is provided with a positioning column, the positioning column of the coronal process prosthesis and the ulna implantation bolt are implanted into the ulna from the upper surface and the small surface of the ulna respectively, and the ulna implantation bolt and the positioning column are fixed in a threaded connection manner. The ulna coronal process prosthesis is used for replacing the ulna coronal process autogenous bone, and the very effective treatment effect specially aiming at ulna coronal process comminuted fracture is obtained.
In the conventional prosthesis replacement operation, a conventional drilling tool such as a kirschner wire, a drill bit or a screw is usually used to drill a hole on the upper surface or the lower surface of the ulnar joint surface, and the prosthesis is fixed to the bone of the patient by using the drilled hole. Specifically, when the ulna coronal process prosthesis is installed on the ulna of a patient, a through hole which penetrates through the ulna from top to bottom is needed to be arranged on the ulna, the through hole is called as a positioning column through hole, the aperture of the positioning column through hole is equal to the outer diameters of the positioning column of the ulna coronal process prosthesis and the ulna implantation bolt, and a bolt head hole for accommodating the bolt head of the ulna implantation bolt is needed to be arranged around the bottom of the positioning column through hole. However, because the surface of the ulnar articular surface is irregular in shape, which is not beneficial to the operations of positioning and drilling the prosthesis, and the compliance of the ulnar coronal process prosthesis to the ulnar articular surface is high, the ulnar coronal process prosthesis is mounted on the ulna by the conventional drilling tool, so that a plurality of operation difficulties such as positioning of the ulnar coronal process prosthesis, drilling of the ulna and fixing of the ulnar coronal process prosthesis are difficult to be completed; even if the installation can be completed, the cutting tools such as a drill bit and the like easily damage peripheral soft tissues in the drilling process; in addition, if the installation process is not controlled well, the gap between the articular surface of the ulnar coronal process prosthesis and the articular surface of the ulna is easy to be overlarge, so that the pressure of the postoperative articular surface is increased, and the postoperative affected part of a patient is difficult to pain.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an ulna coronaries prosthesis erector is used for installing ulna coronaries prosthesis specially to realize the smooth operation of the difficult points of operation such as location, drilling and fixing in the ulna coronaries prosthesis installation, protection cutting tool such as drill bit does not cause the damage to peripheral soft tissue, and makes the compliance degree of ulna coronaries prosthesis articular surface and ulna articular surface satisfy the requirement, does not leave over pain for patient's postoperative affected part.
The utility model provides an ulna coronal process prosthesis installer, which comprises a guide seat, a C-shaped fixed arm, a threaded sleeve, a positioning column drilling sleeve, a Kirschner wire sleeve, a positioning column through hole hollow drill bit and a bolt head hole hollow drill bit, wherein the top ends of the threaded sleeve and the positioning column drilling sleeve are respectively provided with a fixed head, and the guide seat is connected with the threaded sleeve through threads so as to realize that the height of the threaded sleeve on the guide seat is adjustable; the positioning column drilling sleeve is arranged in the threaded sleeve in a penetrating mode, the Kirschner wire sleeve is arranged in the positioning column drilling sleeve in a penetrating mode, the bottom end of the positioning column drilling sleeve is detachably connected and locked with the bottom end of the threaded sleeve, and the bottom end of the Kirschner wire sleeve is detachably connected and locked with the lower end of the positioning column drilling sleeve; the top end of the C-shaped fixed arm is provided with a positioning block, and the bottom end of the C-shaped fixed arm is connected with the side wall of the guide seat; when a positioning column through hole needs to be drilled, the positioning column through hole hollow drill bit is arranged in the positioning column drilling sleeve; when a bolt head hole needs to be drilled, the bolt head hole hollow drill bit is arranged in the threaded sleeve.
Preferably, a first sleeve is arranged at the bottom end of the threaded sleeve, and an internal thread is arranged on the inner wall of the lower end of the first sleeve; the bottom end of the positioning column drilling sleeve is provided with a second sleeve, and the outer wall of the upper end of the second sleeve and the inner wall of the lower end of the second sleeve are respectively provided with an external thread and an internal thread; the bottom end of the Kirschner wire sleeve is provided with a third sleeve, and the outer wall of the upper end of the third sleeve is provided with an external thread; the external thread of the outer wall of the upper end of the second sleeve is connected and locked with the internal thread of the inner wall of the lower end of the first sleeve through threads; and the outer wall of the upper end of the third sleeve is provided with an external thread which is connected and locked with the internal thread of the inner wall of the lower end of the second sleeve through a thread.
Preferably, the height fine adjustment mechanism comprises a dovetail groove guide rail, a connector and a locking bolt, the dovetail groove guide rail is arranged in the vertical direction of the side wall of the guide seat, the connector is arranged at the bottom end of the C-shaped fixing arm, a dovetail groove is arranged in the vertical direction of the side wall of the connector, and the C-shaped fixing arm is slidably arranged on the dovetail groove guide rail of the guide seat through the dovetail groove; be provided with the locking bolt through-hole in the connector, locking bolt set up in the locking bolt through-hole just locking bolt's screw rod fastening is contradicted the lateral wall of guide holder to lock the displacement of the vertical direction of connector.
Preferably, the lower surface of the positioning block is a plane, the two side surfaces of the positioning block are cambered surfaces, and the lower surface of the positioning block is perpendicular to the central axis of the threaded sleeve.
Preferably, the outer diameter of the threaded sleeve is 12mm, and the inner diameter is 8 mm; the outer diameter of the positioning column drilling sleeve is 8mm, and the inner diameter of the positioning column drilling sleeve is 6 mm; the outer diameter of the Kirschner wire sleeve is 6mm, and the inner diameter of the Kirschner wire sleeve is 1.6 mm; the maximum outer diameter of the positioning column through hole hollow drill bit is 6mm, and the maximum outer diameter of the bolt head hole hollow drill bit is 8 mm.
The utility model has the advantages that:
the utility model discloses an ulna coronal process false body erector, the upper surface that the ulna was hugged closely to the locating piece lower surface realizes the location to the ulna, threaded sleeve's fixed head acts on the lower surface of ulna, threaded sleeve forms the compression to the ulna lower surface on the guide holder and presss from both sides tightly, wear to establish the kirschner wire through the kirschner wire sleeve pipe and lead to, reference column drilling sleeve pipe embeds into reference column through-hole hollow drill bit, follow the reference column through-hole that supreme brill bore the ulna down, and threaded sleeve pipe embeds into bolt head hole hollow drill bit, drill out the bolt head mounting hole that the bolt was implanted to the ulna. The upper part of the through hole of the positioning column is used as an installation hole of the positioning column, the lower part of the through hole of the positioning column is used as an implantation channel of the ulna implantation bolt, and a bolt head of the ulna implantation bolt is arranged in the bolt head hole; and screwing the bolt head of the ulna implanting bolt until the ulna implanting bolt is fixedly connected with the positioning column through threads, so that the ulna coronal process prosthesis is installed. The utility model discloses an ulna coronaria prosthesis erector's beneficial effect concrete presentation is in: (1) as an installer specially used for installing the ulna coronal process prosthesis, the operations of positioning, drilling, fixing and the like in the installation process of the ulna coronal process prosthesis can be smoothly realized. (2) When the sleeve applies pressure to the ulna to clamp, the multistage sleeve is installed step by step, so that the operation can be carried out at any time, the convenience and the safety of the operation are improved, the bolt head hole hollow drill bit and the positioning column through hole hollow drill bit operate in the closed loop space of the sleeve, and blades such as the drill bit are protected from damaging peripheral soft tissues. (3) The height fine-tuning mechanism is favorable for observing the matching degree of the ulna articular surface and the corresponding point of the positioning block of the patient, and the distance between the positioning block and the fixed head is finely tuned according to the matching degree, so that the compliance degree of the ulna coronal process prosthesis articular surface and the ulna articular surface meets the requirement, and the pain is not left in the postoperative affected part of the patient. The utility model discloses an ulna coronaria process false body erector, simple structure, the direction is accurate, convenient operation, can realize location, drilling and fixed operation etc. in the ulna coronaria process false body installation comparatively smoothly, has solved this ulna coronaria false body's location, drilling and fixed mounting problem etc, makes the operation of the artificial prosthesis of ulna coronaria process false body replacement ulna coronaria process autogenous bone become the reality, provides a new choice for solving patient's coronaria comminuted fracture treatment.
Drawings
Fig. 1 is a front three-dimensional view of an ulnar coronal process prosthesis installer provided in embodiment 1 of the present invention;
fig. 2 is a side three-dimensional view of an ulnar coronal process prosthesis installer provided in embodiment 1 of the present invention;
fig. 3 is a three-dimensional view of a C-shaped fixing arm provided in embodiment 1 of the present invention;
fig. 4 is a three-dimensional view of a connector of a C-shaped fixing arm according to embodiment 1 of the present invention;
fig. 5 is a three-dimensional view of a positioning block of a C-shaped fixing arm provided in embodiment 1 of the present invention;
fig. 6 is a schematic view of the installation process of the ulnar coronal process prosthesis device provided in example 1 of the present invention.
Detailed Description
Example 1
Referring to fig. 1 and 2, the ulnar coronal prosthesis installer comprises a guide holder 1, a C-shaped fixing arm 2, a threaded sleeve 3, a positioning post drilling sleeve 4, a k-wire sleeve 5 and a locking bolt 6.
The top end and the bottom end of the threaded sleeve 3 are respectively provided with a fixed head 30 and a first sleeve 31, wherein the front end of the fixed head 30 is uniformly provided with a plurality of fixed teeth.
The guide holder 1 is internally provided with a threaded sleeve hole, the inner wall of the threaded sleeve hole is provided with an internal thread, the outer pipe wall of the threaded sleeve 3 is provided with an external thread, the guide holder 1 is sleeved in the threaded sleeve hole to form the threaded sleeve 3, and the threaded sleeve hole of the guide holder 1 is connected with the external thread of the threaded sleeve 3 through the thread to achieve height adjustment of the threaded sleeve 3 on the guide holder 1. The height position of the threaded bushing 3 on the guide base 1 can be adjusted up and down by screwing in or out the external thread of the threaded bushing 3 and the threaded bushing hole of the guide base 1, so that the distance between the positioning block 20 and the fixing head 30 can be adjusted by a coarse height adjustment method.
As a specific embodiment, the upper end of the first sleeve 31 may be fixed on the outer wall of the bottom end of the threaded sleeve 3 by a detachable connection manner such as a threaded connection, or may be fixedly connected with the bottom end of the threaded sleeve 3 by an unremovable connection manner such as welding or integral molding. The inner wall of the lower end of the first sleeve 31 is provided with internal threads.
A second sleeve 41 is arranged at the bottom end of the positioning column drilling sleeve 4, and an external thread and an internal thread are respectively arranged on the outer wall of the upper end and the inner wall of the lower end of the second sleeve 41; the bottom end of the Kirschner wire sleeve 5 is provided with a third sleeve 51, and the outer wall of the upper end of the third sleeve 51 is provided with an external thread.
The positioning column drilling sleeve 4 penetrates through the threaded sleeve 3, and the Kirschner wire sleeve 5 penetrates through the positioning column drilling sleeve 4. The external thread on the outer wall of the upper end of the second sleeve 41 is in threaded connection with the internal thread on the inner wall of the lower end of the first sleeve 31, so that the positioning column drilling sleeve 4 is detachably connected and locked with the bottom end of the threaded sleeve 3; the external thread of the outer wall of the upper end of the third sleeve 51 is in threaded connection with the internal thread of the inner wall of the lower end of the second sleeve 41, so that the detachable connection and locking of the bottom end of the Kirschner wire sleeve 5 and the bottom end of the positioning column drilling sleeve 4 are realized.
Referring to fig. 1 to 3, the C-shaped fixing arm 2 is shaped like a "C", and has a positioning block 20 at its top end and a bottom end connected to a side wall of the guide base 1.
As a connection mode, the bottom end of the C-shaped fixing arm 2 can be directly and fixedly connected with the side wall of the guide seat 1, or even integrally formed. However, in order to enhance the universality of the ulna coronal process prosthesis installer application for different ulna heights of different patients, in addition to the height coarse adjustment method, another adjustment method exists for the distance between the positioning block 20 and the fixing head 30 by arranging a height fine adjustment mechanism, and the adjustment method is called as a height fine adjustment method.
Specifically, the height fine adjustment mechanism includes a coupling head 21, a dovetail groove rail 11, and a lock bolt 6.
The dovetail groove guide rail 11 is arranged in the vertical direction of the side wall of the guide base 1, referring to fig. 4, the bottom end of the C-shaped fixing arm 2 is provided with a connector 21, the side wall of the connector 21 is provided with a dovetail groove 110 in the vertical direction, wherein the cross section of the dovetail groove 110 is trapezoidal, the dovetail groove guide rail 11 is also called as a trapezoidal guide rail, the dovetail groove 110 and the dovetail groove guide rail 11 are mutually matched for use, and the C-shaped fixing arm 2 is slidably arranged on the dovetail groove guide rail 11 of the guide base 1 through the. The connecting head 21 is slidable on the dovetail groove guide rail 11 through the dovetail groove 110, and can restrict the displacement of the connecting head 21 in the front-rear and left-right directions with respect to the guide holder 1, and only allow the displacement of the connecting head 21 in the up-down direction with respect to the guide holder 1, thereby achieving a guiding effect in the vertical direction.
Be provided with locking bolt through-hole 60 in the connector 21, the inner wall of locking bolt through-hole 60 is provided with the internal thread, and locking bolt 6 sets up in locking bolt through-hole 60 and screws up until the lateral wall of locking bolt 6's screw rod fastening conflict guide holder 1 through the screw thread to the displacement of locking connector 21 vertical direction.
It should be noted that, when the height of the guide base 1 on the threaded sleeve 3 is not changed, the relative position between the connector 21 and the guide base 1 can be adjusted by the relative sliding of the dovetail groove 110 and the dovetail groove guide rail 11, and finally the connector 21 is locked by the locking bolt 6, so as to achieve the fine adjustment of the distance between the positioning block 20 and the fixing head 30. The dovetail groove 110 slides relatively on the dovetail groove guide rail 11, so that the height of the positioning block 20 relative to the guide base 1 can be changed until the height meets the requirement, because the dovetail groove 110 limits the displacement of the connector 21 relative to the guide base 1 in the front-back and left-right directions, the locking bolt 6 penetrates through the locking bolt through hole 60 and is screwed through threads, the displacement of the connector 21 relative to the guide base 1 in the up-down direction is continuously limited, the vertical locking of the connector 21 is realized, and finally the adjustment of the relative position of the guide base 1 and the C-shaped fixing arm 1 in height is realized.
The lower surface of the positioning block 20 is tightly attached to the upper surface of the ulna, the fixing head 30 of the threaded sleeve 3 acts on the lower surface of the ulna, the height of the threaded sleeve 3 on the guide seat 1 is adjusted, and compression type clamping on the ulna is achieved. The matching degree of the ulnar joint surface of the patient and the corresponding point of the positioning block 20 is observed, and the distance between the positioning block 20 and the fixing head 30 is finely adjusted according to the matching degree, so that the increase of the operation fault tolerance rate is facilitated. In addition, in the fine adjustment process, the compliance degree of the ulna coronal process prosthesis joint surface and the ulna joint surface meets the requirement, and pain is not left on an affected part after a patient operates.
Referring to fig. 5, the upper surface and the lower surface of the positioning block 20 are both flat, the two sides of the positioning block 20 are cambered surfaces, and the profile of the side surface of the positioning block 20 is consistent with the profile of the side surface of the coronaries prosthesis 71, so as to ensure that the mark left on the ulna by the positioning block 20 is suitable for accommodating the side surface of the coronaries prosthesis 71, and ensure that the positioning block 20 can find a position suitable for implanting the coronaries prosthesis 71 on the osteotomy surface. The lower surface of the positioning block 20 is perpendicular to the central axis of the threaded sleeve 3, so that when the kirschner wire penetrates out of the kirschner wire sleeve 5, the kirschner wire can be guaranteed to be perpendicular to the osteotomy surface, and straightness of the kirschner wire is guaranteed.
Specifically, through the analysis after the size statistics of the ulna of the vast majority of people, the size requirements of the threaded sleeve 3, the positioning column drilling sleeve 4 and the kirschner wire sleeve 5 for the operation of replacing the ulna coronaries of patients by ulna coronaries prosthesis are as follows: the external diameter of the threaded sleeve 3 is 12mm, the external thread specification is metric thread M12, and the internal diameter is 8 mm; the outer diameter of the positioning column drilling sleeve 4 is 8mm, and the inner diameter is 6 mm; the outer diameter of the kirschner wire sleeve 5 is 6mm, and the inner diameter is 1.6 mm. The maximum outer diameter of the positioning column through hole hollow drill bit is 6mm, and the maximum outer diameter of the bolt head hole is 8 mm.
Referring to fig. 6, a method of installing an ulnar coronal process prosthetic device to an ulna 8, the installing step includes: firstly, the positioning column 712 and the ulna implanting bolt 72 of the coronal process prosthesis 71 are respectively installed at the upper part and the lower part of the positioning column through hole of the ulna 8, and the bolt head of the ulna implanting bolt 72 is embedded into the bolt head hole; the locking screw 73 is then passed through and secures the coronal process prosthesis 71. Wherein, the contact part of the bottom plane of the coronal process prosthesis 71 and the ulna osteotomy surface is provided with an imitated trabecular porous structure interface layer which is beneficial to the growth of bone substances in the later period and forms a synergistic effect with the locking screw 73 to form long-term fixation on the coronal process prosthesis 71.
In addition, the ulna coronal process prosthesis installer also comprises a positioning column through hole hollow drill bit and a bolt head hole hollow drill bit, wherein when the positioning column through hole needs to be drilled, the positioning column through hole hollow drill bit is arranged in the positioning column drilling sleeve 4; when a bolt head hole is required, a hollow drill bit of the bolt head hole is arranged in the threaded sleeve 3.
Wherein, the space between the positioning block 20 and the fixing head 30 is used for placing the ulna 8;
the Kirschner wire casing pipe 5 is used for penetrating a Kirschner wire, and mainly plays a role in guiding to ensure that holes drilled by the threaded casing pipe 3 and the positioning column drilling casing pipe 4 are straight;
the maximum outer diameter of a positioning column through hole hollow drill bit which is arranged in the positioning column drilling sleeve 4 is equal to the outer diameter of the positioning column 712, the positioning column through hole hollow drill bit drills through an ulna from bottom to top to obtain a positioning column through hole, the upper part of the positioning column through hole is used as an installation hole of the positioning column 712, and the lower part of the positioning column through hole is used as an implantation channel of the ulna implantation bolt 72;
the maximum outer diameter of a bolt head hole hollow drill bit placed in the threaded sleeve 3 is equal to the outer diameter of a bolt head of the ulna implanting bolt 72, the bolt head hole hollow drill bit drills out a bolt head hole which is used for installing the bolt head of the ulna implanting bolt, the outer diameter of the bolt head hole is equal to the outer diameter of the bolt head of the ulna implanting bolt, the depth of the bolt head hole is slightly larger than the thickness of the bolt head of the ulna implanting bolt 72, and therefore the bolt head of the ulna implanting bolt 72 is enabled to be integrally buried in the ulna.
Example 2
step S1: before an operation, the ulnar joint surface of a patient is preprocessed, the original ulnar coronal process is cut to form a bone cutting surface, wherein the bone cutting surface is a plane, the positioning block 20 is manufactured according to the side surface shape of the coronal process prosthesis 71, and the installation position of the coronal process prosthesis 71 is determined according to the position of the bone cutting surface and the compliance degree of the ulnar joint surface and the corresponding point of the positioning block 20;
step S2: the lower surface of the positioning block 20 is tightly attached to the upper surface of the ulna 8, the height position of the threaded sleeve 3 in the guide seat 1 is adjusted by rotating the threaded sleeve 3 until the fixing head 30 of the threaded sleeve 3 is close to the lower surface of the ulna 8;
step S3: sequentially screwing the positioning column drilling sleeve 4 into the threaded sleeve 3, screwing the Kirschner wire sleeve 5 into the positioning column drilling sleeve 4, connecting and locking the second sleeve 41 and the first sleeve 31 through threads, and connecting and locking the third sleeve 51 and the second sleeve 41 through threads;
step S4: a kirschner wire with the outer diameter of 1.6mm penetrates through the kirschner wire sleeve 5 until the kirschner wire penetrates to the osteotomy surface, the kirschner wire is reserved, and the kirschner wire sleeve 5 is withdrawn;
step S5: connecting a positioning column through hole hollow drill bit with a drill rod, placing the positioning column through hole hollow drill bit in the positioning column drilling sleeve 4, drilling the lower surface of the ulna 8 by using the positioning column through hole hollow drill bit until the positioning column through hole hollow drill bit is drilled to half of the height of the ulna 8, and withdrawing the positioning column through hole hollow drill bit and the positioning column drilling sleeve 4;
step S6: connecting a drill rod to a bolt head hole hollow drill bit, placing the bolt head hole hollow drill bit in the threaded sleeve 3, and drilling the lower surface of the ulna 8 by using the bolt head hole hollow drill bit until the bolt head hole is drilled by the bolt head hole hollow drill bit, wherein the depth of the bolt head hole is equal to the back degree of a bolt head of the ulna implanting bolt 2;
step S7: the positioning column through hole hollow drill bit is connected with a drill rod, the positioning column through hole hollow drill bit is arranged in the positioning column drilling sleeve 4, the lower surface of the ulna 8 is drilled by the positioning column through hole hollow drill bit until the ulna 8 is completely drilled from bottom to top to obtain a positioning column through hole, and the aperture of the positioning column through hole is equal to the outer diameters of the positioning column 712 and the ulna implanting bolt 72;
step S8: withdrawing the positioning column drilling sleeve 4 and the Kirschner wire from top to bottom;
step S9: rotating the threaded sleeve 3 until the threaded sleeve 3 leaves the lower surface of the ulna 8;
step S10: according to the installation method of the ulna coronal process prosthesis device, the positioning column 712 and the ulna implanting bolt 72 of the coronal process prosthesis 71 are respectively installed at the upper part and the lower part of the positioning column through hole of the ulna 8; and the bolt head of the ulna implanting bolt 72 is arranged in the bolt head hole; screwing the bolt head of the ulna implanting bolt 2 until the ulna implanting bolt 2 is fixedly connected with the positioning column 12 through threads; the locking screw 73 is then passed through the coronal process prosthesis 71 and secures the coronal process prosthesis 71, completing the installation of the ulnar coronal process prosthesis assembly.
In order to increase the surgical error tolerance rate, preferably, between step S3 and step S4, the following steps are added:
observing the matching degree of the ulnar joint surface of the patient and the corresponding point of the positioning block 20, finely adjusting the distance between the positioning block 20 and the fixing head 30 according to the matching degree,
sliding the connector 21 on the dovetail groove guide rail 11, and finely adjusting the distance between the positioning block 20 and the fixing head 30 until the fixing head 30 of the threaded sleeve 3 vertically abuts against the lower surface of the ulna 8;
the locking bolt 6 is arranged in the locking bolt through hole 60 and screwed by threads until the screw of the locking bolt 6 is tightly pressed against the side wall of the guide seat 1, so as to lock the displacement of the connector 21 in the vertical direction.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (5)
1. An ulna coronal process prosthesis erector is characterized by comprising a guide seat (1), a C-shaped fixed arm (2), a threaded sleeve (3), a positioning column drilling sleeve (4), a Kirschner wire sleeve (5), a positioning column through hole hollow drill bit and a bolt head hole hollow drill bit,
the top ends of the threaded sleeve (3) and the positioning column drilling sleeve (4) are respectively provided with a fixing head (30), and the guide seat (1) is in threaded connection with the threaded sleeve (3) so as to realize that the height of the threaded sleeve (3) on the guide seat (1) is adjustable;
the positioning column drilling sleeve (4) penetrates through the threaded sleeve (3), the Kirschner wire sleeve (5) penetrates through the positioning column drilling sleeve (4), the bottom end of the positioning column drilling sleeve (4) is detachably connected and locked with the bottom end of the threaded sleeve (3), and the bottom end of the Kirschner wire sleeve (5) is detachably connected and locked with the lower end of the positioning column drilling sleeve (4);
a positioning block (20) is arranged at the top end of the C-shaped fixed arm (2), and the bottom end of the C-shaped fixed arm (2) is connected with the side wall of the guide seat (1);
when a positioning column through hole needs to be drilled, the positioning column through hole hollow drill bit is arranged in the positioning column drilling sleeve (4); when a bolt head hole needs to be drilled, the hollow drilling bit of the bolt head hole is arranged in the threaded sleeve (3).
2. The ulnar coronal process prosthesis installer as claimed in claim 1,
a first sleeve (31) is arranged at the bottom end of the threaded sleeve (3), and internal threads are arranged on the inner wall of the lower end of the first sleeve (31); a second sleeve (41) is arranged at the bottom end of the positioning column drilling sleeve (4), and an external thread and an internal thread are respectively arranged on the outer wall of the upper end and the inner wall of the lower end of the second sleeve (41); a third sleeve (51) is arranged at the bottom end of the Kirschner wire sleeve (5), and an external thread is arranged on the outer wall of the upper end of the third sleeve (51);
the external thread of the outer wall of the upper end of the second sleeve (41) is connected and locked with the internal thread of the inner wall of the lower end of the first sleeve (31) through threads; and the outer wall of the upper end of the third sleeve (51) is provided with an external thread which is connected and locked with the internal thread of the inner wall of the lower end of the second sleeve (41) through a thread.
3. The ulnar coronal prosthesis installer as claimed in claim 1, further comprising a height fine adjustment mechanism comprising a dovetail groove guide rail (11), a connector (21) and a locking bolt (6),
the dovetail groove guide rail (11) is arranged in the vertical direction of the side wall of the guide seat (1), the connector (21) is arranged at the bottom end of the C-shaped fixing arm (2), a dovetail groove (110) is arranged in the vertical direction of the side wall of the connector (21), and the C-shaped fixing arm (2) is slidably arranged on the dovetail groove guide rail (11) of the guide seat (1) through the dovetail groove (110);
be provided with locking bolt through-hole (60) in connector (21), locking bolt (6) set up in locking bolt through-hole (60) just the screw rod fastening of locking bolt (6) is contradicted the lateral wall of guide holder (1), in order to lock the displacement of connector (21) vertical direction.
4. The ulnar coronal process prosthesis installer as claimed in claim 1,
the lower surface of the positioning block (20) is a plane, two side surfaces of the positioning block (20) are cambered surfaces,
the lower surface of the positioning block (20) is vertical to the central axis of the threaded sleeve (3).
5. The ulnar coronal process prosthesis installer as claimed in claim 1,
the outer diameter of the threaded sleeve (3) is 12mm, and the inner diameter of the threaded sleeve is 8 mm; the outer diameter of the positioning column drilling sleeve (4) is 8mm, and the inner diameter is 6 mm; the outer diameter of the Kirschner wire sleeve (5) is 6mm, and the inner diameter of the Kirschner wire sleeve is 1.6 mm; the maximum outer diameter of the positioning column through hole hollow drill bit is 6mm, and the maximum outer diameter of the bolt head hole hollow drill bit is 8 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021003416.6U CN213346181U (en) | 2020-06-04 | 2020-06-04 | Ulna coronal process prosthesis installer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021003416.6U CN213346181U (en) | 2020-06-04 | 2020-06-04 | Ulna coronal process prosthesis installer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213346181U true CN213346181U (en) | 2021-06-04 |
Family
ID=76125497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021003416.6U Active CN213346181U (en) | 2020-06-04 | 2020-06-04 | Ulna coronal process prosthesis installer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213346181U (en) |
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2020
- 2020-06-04 CN CN202021003416.6U patent/CN213346181U/en active Active
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