CN217744549U - Jaw face operation is with split type screw - Google Patents

Abstract

The utility model discloses a jaw face operation is with split type screw belongs to the medical instrument field, the screw includes outer screw, cavity connecting piece and inlayer screw, outer screw is used for putting into the bone in, just be equipped with the screw thread way in the outer screw, the inlayer screw passes behind the cavity connecting piece spiro union in the screw thread way. The utility model discloses a design split type screw, during the use with outer screw nail income bone, then fix the cavity connecting piece through the mode of inlayer screw and outer screw spiro union, the cavity connecting piece can be used to install the ligature steel wire to adapt to the operation needs. And the cavity connecting piece can carry out different style designs, for example the cavity connecting piece does not take the ligature steel wire or with ligature steel wire fixed connection on the cavity connecting piece, the split type screw of the equal adaptation of the cavity connecting piece of different styles, can replace at any time, increase convenience and security.

Description

Jaw face operation is with split type screw

Technical Field

The utility model relates to the technical field of medical equipment, especially a jaw face operation is with split type screw.

Background

The teeth are special structures located in oral cavities, a plurality of teeth are arranged in upper and lower jaws to form dentition, and the upper dentition and the lower dentition are contacted with each other to form an occlusion relation. In oromaxillofacial surgery, restoring the correct occlusal relationship is one of the important therapeutic objectives. In orthognathic surgery and reduction of fractures, it is sometimes necessary to determine the position of the maxilla and mandible of a patient through the occlusal relationship. Because many operations on the oral and maxillofacial region need to be performed under general anesthesia, and a patient in a general anesthesia state cannot close the mouth by himself, generally, the maxilla and the mandible are bound into a whole according to a certain occlusion relation by means of the intermaxillary ligation screws and the ligation wires, so that the operation is convenient. At present, used intermaxillary ligation screws are mostly made of stainless steel or titanium alloy, self-tapping screws are adopted, the screw heads are cross-shaped screw heads, and the side surfaces of the screw heads are provided with grooves and 4 symmetrical crossed holes, so that ligation steel wires and elastic rubber bands can be fixed.

When the existing inter-jaw ligation screw is used, a steel wire needs to penetrate through a cross hole at the head part of a screw at one side, then penetrate through an operation guide plate or a cross hole on the jaw screw, and finally, the screw is screwed up in a rotating mode to complete ligation. Sometimes, the soft tissue around the mouth has obvious swelling due to operations or trauma and the like, the cross hole at the head of the screw is difficult to expose, and the mouth and the lip are pulled forcefully, so that great pain is brought to the patient, and the ligation operation is time-consuming and labor-consuming. When the steel wire passes through the cross hole, the tip of the steel wire is easy to stab the oral mucosa of a patient or an operator, and unnecessary trauma and pollution are caused.

Examples of split or hollow screws reported in the prior art: CN109681508a discloses a split screw, the head of which is separated from the screw, in order to prevent the head of the screw from protruding out of the surface of the component after the screw is screwed into the component, so that other components or clothes are not easy to be hooked. CN204446084U discloses a high strength hollow bone screw, the hollow screw is equipped with a section of internal thread, screws the reinforcing screw into the hollow screw, when the reinforcing screw and the hollow screw are fastened to the rated torque, the reinforcing screw is broken, the hollow screw is filled with the reinforcing screw, so that the rigidity of the screw is greatly improved.

The present inventors have aimed to develop a ligation screw that is convenient to operate and does not cause unnecessary trauma and contamination to the surgical operation.

SUMMERY OF THE UTILITY MODEL

In view of above prior art's not enough, the utility model aims at providing a split type screw is used in maxillofacial surgery, the screw includes outer screw, cavity connecting piece and inlayer screw, outer screw is used for imbedding intraosseously, just be equipped with the screw thread nail way in the outer screw, the inlayer screw passes behind the cavity connecting piece spiro union in the screw thread nail way.

In some embodiments of the present invention, an annular groove is formed on the periphery of the hollow connecting member for accommodating a ligation wire;

or at least one ligature steel wire is arranged on the outer side of the hollow connecting piece.

In some embodiments of the present invention, the groove width of the annular groove is 0.5 to 1.2mm.

In some embodiments of the present invention, the outer layer screw includes a base and a screw rod, the screw rod head end is connected to the base, and the screw channel is disposed in the screw rod;

the hollow connecting piece is sleeved outside the base station; and the base station is provided with a through hole communicated with the threaded nail channel and used for allowing the inner layer screw to penetrate through the through hole and then be in threaded connection with the threaded nail channel.

In some embodiments of the present invention, the screw rod end is pointed; and/or the screw rod of the screw is externally provided with a cutting thread.

In some embodiments of the present invention, the inner screw comprises a nut and a screw rod;

the screw thread nail way is internally provided with internal threads, and the screw rod is externally provided with external threads matched with the internal threads; and in an assembly state, two ends of the hollow connecting piece respectively abut against the screw cap and the base station.

The utility model discloses in some embodiments, the base station includes base station seat and base station post, the cavity connecting piece cover is located the base station post outside, and with the base station seat supports and holds.

In some embodiments of the present invention, the screw length is 6 to 9mm, and the diameter is 2.5 to 3.5mm; and/or the length of the base station is 3.5-5.5 mm; the length of the screw rod is 6-9 mm, and the diameter is 1-2 mm.

In some embodiments of the present invention, the cross-section of the abutment column is hexagonal.

In some embodiments of the present invention, the hollow connector is a hexagonal nut.

The utility model provides a jaw face operation is with split type screw possesses following beneficial effect:

1) Through the split type screw of design, during the use with outer screw nail in the bone, then fix the cavity connecting piece through inlayer screw and outer screw spiro union's mode, the cavity connecting piece can be used to install the ligature steel wire to adapt to the operation needs.

2) Two types of cavity connecting piece designs, a cavity connecting piece has the annular groove, and is applicable in not needing the ligature between the jaw, or utilizes the annular groove to hold the operation scene of ligature steel wire, makes things convenient for interim use. The ligation steel wire is installed to another hollow connecting piece, and is applicable in the operation scene that needs the ligature between the jaws, saves the inconvenience of wearing the steel wire, avoids stabbing patient or operation doctor, causes extra wound or occupation to expose. And two hollow connecting pieces are matched with split screws, so that the two hollow connecting pieces can be replaced at any time, and convenience is improved.

3) The tail end of the screw rod of the outer layer screw is sharp and can penetrate into the mucous membrane. The screw rod outside is equipped with cutting screw, possesses certain cutting force, need not power assistance and can directly pierce through the stable maintenance of cortex lycii.

Drawings

Fig. 1 is a schematic front view of an outer screw of a split screw according to the present invention;

fig. 2 is a schematic top view of an outer screw of the split screw according to the present invention;

FIG. 3 is a schematic front view of the split screw of the present invention without the intermediate hollow connecting member with wire thread;

fig. 4 is a schematic top view of the middle hollow connecting member of the split screw according to the present invention;

FIG. 5 is a schematic front view of the split screw with a wire intermediate hollow connector of the present invention;

fig. 6 is a schematic front view of an inner screw of the split screw according to the present invention;

fig. 7 is a schematic top view of an inner screw of the split screw according to the present invention;

fig. 8 is a split exploded view of the split screw of the present invention.

Reference numbers in the figures:

1. an outer layer screw;

11. a screw thread path;

121. a base stage;

122. a foundation pillar;

13. a screw rod;

131. cutting threads;

2. a hollow connector;

21. an annular groove;

22. ligating a steel wire;

23. a lower layer pore canal;

24. an upper layer pore canal;

3. an inner layer screw;

31. a nut;

32. a screw rod.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "outer layer", "inner layer", "lower side", "outer side", "both ends" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "provided," and "connected" are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1-8, the split screw for maxillofacial surgery includes an outer screw 1, a hollow connector 2 and an inner screw 3, the outer screw 1 is inserted into a bone, a screw channel 11 is formed in the outer screw 1, and the inner screw 3 is threaded into the screw channel 11 after passing through the hollow connector 2.

Specifically, the split type screw is divided into a detachable outer layer screw 1, a hollow connecting piece 2 and an inner layer screw 3, wherein the outer layer screw 1 is obtained by adopting but not limited to an automatic screw for design, a thread screw channel 11 is arranged inside the outer layer screw, the thread screw channel 11 is preferably required to be incapable of penetrating through the outer layer screw 1, the inner layer screw 3 is fixedly connected in the thread screw channel 11 after penetrating through the hollow connecting piece 2, so that the hollow connecting piece 2 is fixed, and the hollow connecting piece 2 can be used for containing or externally connecting a ligation steel wire.

In one embodiment, the periphery of the hollow connector 2 is provided with an annular groove 21 for receiving a ligation wire. Specifically, the hollow connector 2 with the annular groove can be used for clamping the ligature wire into the annular groove 21 during temporary inter-jaw ligation. In order to prevent the ligature wire from sliding to cause a change in occlusion relation, the groove width is matched according to a clinically commonly used intermaxillary ligature wire, and generally, the groove width of the annular groove 21 is 0.5 to 1.2mm, preferably 0.9 to 1.1mm.

In a preferred embodiment, the outer layer screw 1 comprises a base and a screw rod 13, the head end of the screw rod 13 is connected with the base, the screw channel 11 is arranged in the screw rod 13, the hollow connecting member 2 is sleeved outside the base, and the base is provided with a through hole communicated with the screw channel 11 for the inner layer screw 3 to pass through and then be screwed in the screw channel 11. In this embodiment, the hollow connecting member 2 is sleeved outside the base, and then screwed tightly with the thread screw channel 11 of the outer layer screw 1 through the inner layer screw 3, so that one end of the hollow connecting member 2 abuts against the inner layer screw 3, and the other end of the hollow connecting member can adopt, but is not limited to, adopt, but abuts against a stopper arranged on the base or the outer layer screw, so as to form a clamping fixed connection relationship, and the hollow connecting member 2 is stably fixed between the outer layer screw and the inner layer screw.

In one embodiment, as shown in fig. 1 and fig. 2, the base includes a base seat 121 and a base pillar 122, and the hollow connector 2 can be sleeved outside the base pillar 122 and abut against the base seat 121. More specifically, the cross-section of the base pillar 122 is hexagonal and can be used with a socket head screwdriver. The tail end of the screw rod 13 is pointed, the cutting thread 131 is arranged outside the screw rod 13, and the tail end of the screw rod of the outer layer screw is pointed and can penetrate into the mucous membrane. The screw rod outside is equipped with cutting screw, possesses certain cutting force, need not power assistance and can directly pierce through the stable maintenance of cortex lycii.

In a preferred embodiment, as shown in fig. 6 and 7, the inner layer screw 3 includes a nut 31 and a screw rod 32, an internal thread is provided in the screw channel 11, an external thread adapted to the internal thread is provided outside the screw rod 11, and in an operating state, two ends of the hollow connecting member 2 respectively abut against the nut 31 and the base. Specifically, the nut 31 is selected from a flat head cross screw and is matched with a cross screwdriver for use.

In a specific embodiment, the connection or penetration or communication positions of the outer layer screw 1, the hollow connecting piece 2 and the inner layer screw 3 are in mutually matched shapes or structures.

Specifically, in one embodiment, a screw with a ring-shaped recess is provided, wherein the hollow connector 2 is a hexagon nut, as shown in fig. 3, which is a front view of the hollow connector (hexagon nut) with the ring-shaped recess, and fig. 4, which is a top view of the hollow connector (hexagon nut) with the ring-shaped recess. Preferably, the hollow connecting piece described in this embodiment may be modified from a conventional hexagon nut, as shown in fig. 3, an annular groove 21 is formed in the hexagon nut, and the hexagon nut is divided into an upper nut and a lower nut, the overall height of the hexagon nut is 4mm, the upper portion and the lower portion are both 1.5mm, and the annular groove formed in the middle is about 1mm. As shown in fig. 4, the upper nut is provided with an upper hole 24, and the diameter of the upper hole 24 is about 1.5mm, so that the inner layer screw can pass through the hole; the lower nut is provided with a lower hole passage 23, the cross section of the lower hole passage is hexagonal, and the hexagonal lower hole passage is matched with the hexagonal base pillar 122, so that the hexagonal nut is sleeved outside the base pillar 122, the hexagonal lower hole passage is a regular hexagonal hole passage, the cross section is regular hexagon, and the length of one side is 3mm. In addition, the base station base 121 is a circular ring table and is fixed on the outer side of the screw rod in a surrounding mode, the height of the base station base 121 is 1mm, the diameter of the base station base is 5mm, and the height of the base station column 122 is 4mm.

In another embodiment, a screw of the type having a ligature wire is provided, wherein at least one ligature wire 22 is provided on the outside of the hollow connecting element 2. Generally, two ligature wires are symmetrically arranged at the outer side of the hollow connecting piece 2 respectively. Specifically, the ligature wire 22 is generally fixed to the outside of the hollow connecting member 2 by welding. More specifically, each ligature wire is about 5-15 cm in length and about 0.4-0.8 mm in diameter, and can be used for inter-jaw ligation, fixing of an operation guide plate and the like. More specifically, in an embodiment, the hollow connector 2 is a hexagon nut, and fig. 5 is a front view of the hollow connector (hexagon nut) with the steel wire ligature, and the top view is similar to the hollow connector with the annular groove, and the description thereof is omitted.

It should be noted that the outer layer screw 1, the hollow connecting member 2 and the inner layer screw 3 in the above embodiments may be sized as desired. Generally, the screw 13 has a length of 6 to 9mm and a diameter of 2.5 to 3.5mm. The length of the foundation pillar 122 is 3.5 to 5.5mm. The length of the screw rod 32 is 6-9 mm, and the diameter is 1-2 mm.

In a specific embodiment, shown in exploded view in fig. 8, the outer layer screw 1, the hollow connector 2 and the inner layer screw 3 are detachably connected.

The use method of the split type screw for the maxillofacial surgery provided by the embodiment comprises the following steps: the outer layer screw is nailed into a bone in an operation, then a proper hollow connecting piece is selected to be sleeved on the base pillar of the outer layer screw, and finally the inner layer screw penetrates through the base pillar and is screwed down in the screw thread nail channel to finish the fixation of the hollow connecting piece. The inner layer screw without the steel wire is used when the jaw is ligated, so that the operation is prevented from being influenced; the intermediate nut carrying the steel wire is replaced and used when ligation is needed, so that the inconvenience of threading the steel wire is avoided, and the additional trauma or occupation exposure caused by stabbing patients or surgeons is avoided.

The utility model discloses a design a split type screw, but be equipped with the non-steel wire style of mutual replacement and carry steel wire style inlayer screw, effectively reduced in the maxillofacial operation and when the ligature of operation back jaw repeatedly wear the inconvenience of putting the steel wire, reduced in the operation process patient or doctor and stabbed by the steel wire and cause the risk that wound pollutes or the occupation exposes, simplified operation steps, it is long when shortening the operation, to improving patient's postoperative comfort level, shorten recovery time and have certain clinical meaning.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a jaw face operation is with split type screw, its characterized in that, the screw includes outer screw (1), cavity connecting piece (2) and inlayer screw (3), outer screw (1) are used for putting into the bone in, just be equipped with screw thread nail way (11) in outer screw (1), inlayer screw (3) pass behind cavity connecting piece (2) spiro union in screw thread nail way (11).

2. Split screw according to claim 1, characterised in that the periphery of the hollow connector (2) is provided with an annular groove (21) for receiving a ligature wire;

or at least one ligature steel wire (22) is arranged on the outer side of the hollow connecting piece (2).

3. The split screw according to claim 2, wherein the groove width of the annular groove (21) is 0.5-1.2 mm.

4. The split screw according to claim 1, wherein the outer layer screw (1) comprises a base and a screw rod (13), the head end of the screw rod (13) is connected with the base, and the thread channel (11) is arranged in the screw rod (13);

the hollow connecting piece (2) is sleeved outside the base station; and the base station is provided with a through hole communicated with the threaded nail channel (11) and used for allowing the inner layer screw (3) to pass through the through hole and then be screwed in the threaded nail channel (11).

5. The split screw according to claim 4, wherein the screw shank (13) is pointed at its trailing end; and/or the screw rod (13) is externally provided with a cutting thread (131).

6. The split screw according to claim 4, wherein the inner layer screw (3) comprises a nut (31) and a screw shank (32);

an internal thread is arranged in the threaded nail path (11), and an external thread matched with the internal thread is arranged outside the screw rod (32); and in the assembling state, two ends of the hollow connecting piece (2) respectively support the screw cap (31) and the base station.

7. The split type screw according to claim 6, wherein the abutment comprises an abutment base (121) and an abutment column (122), and the hollow connecting member (2) is sleeved outside the abutment column (122) and abuts against the abutment base (121).

8. The split screw according to claim 7, wherein the screw shank (13) has a length of 6 to 9mm and a diameter of 2.5 to 3.5mm; and/or the length of the base pillar (122) is 3.5-5.5 mm; the length of the screw rod (32) is 6-9 mm, and the diameter is 1-2 mm.

9. The split screw according to claim 7, wherein the cross-section of the abutment post (122) is hexagonal.

10. The split screw according to any one of claims 1 to 9, wherein the hollow connector (2) is a hexagonal nut.

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