CN218652158U

CN218652158U - Nasal cavity built-in maxillary bone tractor

Info

Publication number: CN218652158U
Application number: CN202220546960.8U
Authority: CN
Inventors: 黄旋平; 廖凤春; 谢庆条; 李华; 过禾佳; 何世熙; 袁宗毅; 王亚茜; 刘海锋; 林海运; 张涛; 周诺
Original assignee: COLLEGE OF STOMATOLOGY GUANGXI MEDICAL UNIVERSITY
Current assignee: COLLEGE OF STOMATOLOGY GUANGXI MEDICAL UNIVERSITY
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2023-03-21
Anticipated expiration: 2032-03-14

Abstract

The utility model relates to a nasal cavity inner-positioned maxillary retractor, which comprises a movable traction plate, a fixed traction plate and a rod-shaped connecting piece, wherein the fixed traction plate is fixedly connected with the connecting piece, the connecting piece is provided with a chute along the length direction thereof, the movable traction plate is provided with a slide block, and the slide block is inserted into the chute and can slide along the chute; the slide block is provided with a rotating hole, the movable traction plate is rotatably inserted into the rotating hole, and a fastening device for fastening the movable traction plate is arranged between the slide block and the movable traction plate. Because the relative slider of activity traction plate ability rotates, can improve activity traction plate and fixed traction plate and the laminating of bone tissue according to patient's condition angle regulation between activity traction plate and the fixed traction plate, increase fixed area makes the fixed more firm of nasal cavity built-in type maxilla tractor, reduces the time that medical personnel bent when the operation moreover, improves medical personnel's work efficiency.

Description

Nasal cavity built-in maxillary bone tractor

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to nasal cavity internal type maxillary tractor.

Background

The dysplasia of the middle face is a common maxillofacial deformity, and is mostly secondary to a congenital cleft lip and palate, which affects the maxillofacial function and appearance of a patient. Since the deformity appears earlier, the physiological development of the children patients is often affected badly, and the deformity can be corrected as early as possible, which is beneficial to promoting the physiological development of the children patients. At present, the maxillary traction technique through the suture is generally adopted for treatment, has the advantages of minimally invasive, simple operation, small risk, suitability for children patients in the growth period and the like, and has been successfully applied to clinic.

The technique of transoral distraction of the maxilla is mainly achieved by applying traction to the maxilla by a distractor. Conventionally, a maxillary distractor is generally installed on a maxillary dentition, a traction force acts on the maxillary dentition, and a traction force needs to be applied to the whole maxillary dentition, so that the maxillary dentition is achieved by applying the traction force to a nasal cavity, and an angle exists between the nasal cavity and the maxillary dentition. Therefore, in clinical application, the titanium plate fixed by the retractor is required to be bent to fit the bone surface. However, bending the fixed titanium plate in the operation not only prolongs the operation time, but also has lower operation effect on residual stress and microcracks caused by the fixed titanium plate.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a nasal cavity internal type maxillary tractor is provided can improve the fixed titanium plate of tractor and the laminating degree of osseous tissue, makes nasal cavity internal type maxillary tractor fixed more firm, improves medical personnel's work efficiency moreover.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the nasal cavity built-in maxillary retractor comprises a movable traction plate, a fixed traction plate and a rod-shaped connecting piece, wherein the fixed traction plate is fixedly connected with the connecting piece, the connecting piece is provided with a sliding groove, the movable traction plate is provided with a sliding block, and the sliding block is inserted into the sliding groove and can slide along the sliding groove; the slide block is provided with a rotating hole, the movable traction plate is rotatably inserted into the rotating hole, and a fastening device for fastening the movable traction plate is arranged between the slide block and the movable traction plate.

As a further improvement of the technical scheme:

the movable traction plate comprises a rotating part and two fixed plates respectively arranged on two sides of the rotating part, the rotating part and the two fixed plates are integrally formed to form a U-shaped structure, and a plurality of second screw holes are formed in the fixed plates at intervals in the direction from the opening side to the connecting side; the rotating part comprises a rotating shaft and slats arranged on two sides of the rotating shaft, and the rotating shaft is rotatably inserted into the rotating hole. The movable traction plate can rotate around the sliding block, different angles of the movable traction plate can be selected according to the condition of a patient, and the fitting degree of the movable traction plate and bone tissues is improved. U type structure, two fixed plates are all fixed in the nasal cavity, increase fixed area, form the fixed of face, and are fixed firm.

Furthermore, the length of the rotating shaft is consistent with the depth of the rotating hole, and the two strips are blocked outside the sliding block. The axial movement of the movable traction plate along the rotating shaft is effectively prevented.

Furthermore, the fastening device is a countersunk screw, a plurality of threaded holes matched with the countersunk screw are formed in the outer surface of the rotating shaft at intervals along the radial direction, the sliding block is provided with a countersunk hole, and the countersunk screw penetrates through the countersunk hole and can be inserted into the threaded hole. The end of the countersunk head screw is embedded into the countersunk head hole, so that the smoothness of the sliding block is ensured, and the comfort of a patient is improved. The countersunk head screw is in threaded connection with the rotating shaft, so that the stability of connection between the movable traction plate and the sliding block is improved.

The fixed traction plate is in a runway shape and is provided with a plurality of first screw holes at intervals along the length direction of the fixed traction plate. Fixed traction plate is the runway shape and is provided with a plurality of first screw holes along its length direction interval, and the length and a plurality of first screw hole of fixed traction plate make fixed traction plate fixed more firm, and difficult pine takes off.

The connecting piece comprises a sleeve and a screw rod, the screw rod is rotatably arranged in the sleeve, one end of the screw rod extends out of the sleeve and is connected with an operating rod, a sliding block is slidably sleeved on the screw rod and is in threaded connection with the screw rod, the sliding groove is arranged along the length direction of the sleeve, one side of the sliding block penetrates through the sliding groove and is connected with the movable traction plate, and one end of the sleeve, close to the operating rod, is fixedly connected with the fixed traction plate. The operating rod is rotated to drive the screw rod to rotate, the movable traction plate is forced to move relatively according to the threaded connection adjustment working principle of the screw rod and the sliding block, the traction distance is 0.4mm when the screw rod rotates for one circle, the traction distance can be accurately and slowly adjusted through the threaded transmission of the screw rod and the sliding block, and the clinical expected effect is achieved.

Compared with the prior art, the utility model has the advantages that:

because the relative slider of activity traction plate ability rotates, can improve activity traction plate and fixed traction plate and the laminating of bone tissue according to patient's condition angle regulation between activity traction plate and the fixed traction plate, increase fixed area makes the fixed more firm of nasal cavity built-in type maxilla tractor, reduces the time that medical personnel bent when the operation moreover, improves medical personnel's work efficiency.

Drawings

FIG. 1 is a block diagram of a nasal cavity internal maxillary retractor.

Figure 2 is a cross-sectional view of a nasal cavity internal maxillary retractor.

Fig. 3 is a block diagram of a movable traction plate.

Fig. 4 is a partially enlarged view of a of fig. 2.

Description of reference numerals:

1. a movable traction plate; 2. fixing a traction plate; 3. a connecting member; 4. a fastening device; 11. a slider; 12. a rotating member; 13. a fixing plate; 14. a rotating shaft; 15. laths; 31. a chute; 32. a sleeve; 33. a screw; 34. an operating lever.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the following detailed description of the present invention, taken in conjunction with the accompanying drawings and the detailed description, is given in a non-limiting manner.

As shown in fig. 1 to 4, the nasal cavity internal maxillary retractor of the present embodiment comprises a movable traction plate 1, a fixed traction plate 2 and a rod-shaped connecting member 3, wherein the fixed traction plate 2 is fixedly connected with the connecting member 3, the connecting member 3 is provided with a sliding slot 31, the movable traction plate 1 is provided with a sliding block 11, and the sliding block 11 is inserted into the sliding slot 31 and can slide along the sliding slot 31; the slide block 11 is provided with a rotating hole, the movable traction plate 1 is rotatably inserted into the rotating hole, and a fastening device 4 for fastening the movable traction plate 1 is arranged between the slide block 11 and the movable traction plate 1. The fixed traction plate 2 is in a runway shape and is provided with a plurality of first screw holes at intervals along the length direction. The connecting piece 3 comprises a sleeve 32 and a screw 33, the screw 33 is rotatably arranged in the sleeve 32, one end of the screw 33 extends out of the sleeve 32 and is connected with an operating rod 34, the sliding block 11 is slidably sleeved on the screw 33 and is in threaded connection with the screw, the sliding groove 31 is arranged along the length direction of the sleeve 32, one side of the sliding block 11 penetrates through the sliding groove 31 and is connected with the movable traction plate 1, and one end of the sleeve 32, which is close to the operating rod 34, is fixedly connected with the fixed traction plate 2.

The movable traction plate 1 comprises a rotating part 12 and two fixed plates 13 which are respectively arranged on two sides of the rotating part 12, the rotating part 12 and the two fixed plates 13 are integrally formed to form a U-shaped structure, and a plurality of second screw holes are formed in the fixed plates 13 at intervals in the direction from the opening side to the connecting side; the rotation member 12 includes a rotation shaft 14 and slats 15 provided on both sides of the rotation shaft 14, and the rotation shaft 14 is rotatably inserted into the rotation hole. The length of the rotating shaft 14 is consistent with the depth of the rotating hole, and the two strips 15 are blocked outside the sliding block 11. The fastening device 4 is a countersunk head screw, the outer surface of the rotating shaft 14 is provided with a plurality of threaded holes matched with the countersunk head screws at intervals along the radial direction, the sliding block 11 is provided with a countersunk head hole, and the countersunk head screws penetrate through the countersunk head hole and can be inserted into the threaded holes.

For the use of this example, reference is made to the following steps:

in use, first, the appropriate maxillary retractor model is selected and the retractor mounting position is determined. Secondly, the movable traction plate 1 is rotated according to the angle between the maxillary dentition and the bone surface in the nasal cavity of the patient, the movable traction plate 1 rotates around the rotating shaft 14, and the angle of the movable traction plate 1 is adjusted, so that the angle between the movable traction plate 1 and the fixed traction plate 2 conforms to the bone of the human body. And thirdly, inserting a countersunk screw into the threaded hole through the countersunk hole so that the movable traction plate 1 and the sliding block 11 are relatively fixed. The entire maxillary dentition was then incised, exposing the bone surface. The fixed traction plate 2 is fixed on the maxillary dentition. Finally, the cannula 32 is inserted into the nasal cavity and the movable plate 1 is fixed to the bone surface in the nasal cavity.

During adjustment, the operating rod 34 is rotated clockwise to drive the screw 33 to rotate, the movable traction plate 1 is forced to slide backwards relative to the screw 33 according to the threaded connection adjustment working principle of the screw 33 and the sliding block 11, the traction distance is 0.4mm every time the screw 33 rotates for one circle, a gap is generated, the traction force is utilized to induce the osteogenesis capacity of the jaw bone, new bone is continuously formed to fill the gap, the thread transmission of the screw 33 and the sliding block 11 can accurately and slowly adjust the traction distance, and traction is stopped after a clinical expected effect is achieved. The maxillary bone tractor is kept in the oral cavity of a patient for three months to half a year, the whole tractor is disassembled, and then the maxillary bone wound surface is treated.

Claims

1. Nasal cavity internal-placed maxillary retractor, its characterized in that: the device comprises a movable traction plate (1), a fixed traction plate (2) and a rod-shaped connecting piece (3), wherein the fixed traction plate (2) is fixedly connected with the connecting piece (3), the connecting piece (3) is provided with a sliding groove (31), the movable traction plate (1) is provided with a sliding block (11), and the sliding block (11) is inserted into the sliding groove (31) and can slide along the sliding groove (31); the sliding block (11) is provided with a rotating hole, the movable traction plate (1) is rotatably inserted into the rotating hole, and a fastening device (4) for fastening the movable traction plate (1) is arranged between the sliding block (11) and the movable traction plate (1).

2. The nasal cavity internal maxillary retractor of claim 1 wherein: the movable traction plate (1) comprises a rotating part (12) and two fixing plates (13) which are respectively arranged on two sides of the rotating part (12), the rotating part (12) and the two fixing plates (13) are integrally formed to form a U-shaped structure, and a plurality of second screw holes are formed in the fixing plates (13) at intervals in the direction of the side connected by the opening side; the rotating part (12) comprises a rotating shaft (14) and laths (15) arranged on two sides of the rotating shaft (14), and the rotating shaft (14) can be rotatably inserted into the rotating hole.

3. The nasal intracavitary maxillary retractor of claim 2 wherein: the length of the rotating shaft (14) is consistent with the depth of the rotating hole, and the two strips (15) are blocked outside the sliding block (11).

4. The nasal intracavitary maxillary retractor of claim 3 wherein: the fastening device (4) is a countersunk screw, a plurality of threaded holes matched with the countersunk screw are formed in the outer surface of the rotating shaft (14) at intervals along the radial direction, the sliding block (11) is provided with a countersunk hole, and the countersunk screw can penetrate through the countersunk hole and can be inserted into the threaded hole.

5. The nasal intracavitary maxillary retractor of claim 4 wherein: the fixed traction plate (2) is in a runway shape and is provided with a plurality of first screw holes at intervals along the length direction.

6. The nasal intracavitary maxillary retractor of claim 1 wherein: connecting piece (3) are including sleeve pipe (32) and screw rod (33), the rotatable setting of screw rod (33) is in sleeve pipe (32), screw rod (33) one end stretches out sleeve pipe (32) and is connected with action bars (34), slider (11) slidable cover is located on screw rod (33) and rather than threaded connection, the length direction setting of sleeve pipe (32) is followed in spout (31), slider (11) one side is passed spout (31) and is connected with activity traction plate (1), sleeve pipe (32) are close to action bars (34) one end and fixed traction plate (2) fixed connection.