JPH0496742A - Upper jaw cutting-open device - Google Patents

Abstract

PURPOSE:To fix an upper jaw cutting open device in a stable manner on the cut bone of an upper jaw which consists of the relatively soft bones and facilitate cut opening by constituting the upper jaw cutting-open device from a nearly X-figure-shaped basic part having a stop fixation part and an operating part which can be opened and closed by a finger top through a hinge part, elongation part, indication part, other axis supporting part, seat plate, and a receiving part. CONSTITUTION:When the bone of an upper jaw is cut in the horizontal direction and the cut part is opened, in case of a brain bottom operation, a pointed edge shaped supporting part 6 at an X-figure shaped top edge is attached on a relatively hard bone of the jaw bottom part and fixed, and the other seat plate 8 is attached on the bone of the upper jaw which is cut and formed into a nearly triangular cavity, and fixed by a nearly L-figure-shaped receiving part 9, and an operation part 2 is operated in the closure direction. Since the seat plate is axially supported in turntable and slidable manner on an axis supporting part 7 at the top edge of an elongation part, fine adjustment is enabled according to the state of the bone at the cut part, and the device can be fixed in stable manner on the bone, and the nearly L-figure-shaped receiving part on the seat plate is just fitted into the bone in the vacant part, and stability is increased. Since a stop part 3 exists, together with the operation part, at a nearly X-figure-shaped basic part 1, cut-open state can be maintained, if the reverse revolution stop state by a latch form is held.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an maxillary opening aq device used to open a wound during skull base surgery for tumor removal and other surgeries.

BACKGROUND OF THE INVENTION Conventional X-shaped recesses that can be opened and closed with a fingertip are well known and for public use, and an example thereof is shown in FIG. Such an X-shaped recessor has point-shaped support parts 16.16 formed at the tips of extension parts 15.15 that face each other via the hinge part 14 and the operating part I3 into which the fingertip is inserted. It opens and closes to allow the wound to be expanded during surgery.

In particular, the maxillary retractor used for skull base surgery is approximately
A letter-shaped base 17 and extensions 15.15 at both ends of the X-shape facing the operating portion 13 from the base 17 are bent in an arc so that they can be easily inserted into the opening of the upper jaw. are each bent further outwards to form a pointed support 16,16.

Each of the pointed support parts 16.16 is fixed in contact with the horizontally cut upper and lower bones of the upper jaw, and the wound can be opened by operating the operating part 13 in the closing direction. It is now possible to do so.

By opening the wound in this way, it has become possible to perform cancer surgery on the base of the brain, for example.

Problems to be Solved by the Invention However, in the conventional excavator as described above, the tips of both the X-shaped extensions 15 and I5 are pointed support parts 15 and 15, so that the bottom bone The tip can be fixed by applying it to a strong and flat bone such as a bone, but if it comes into contact with a rounded or uneven bone, it is extremely unstable, and the bone may be crushed or the surrounding area may be damaged. There was a problem that it caused scratches on the surface.

Recently, it has become possible to perform cancer surgery on the base of the brain by horizontally cutting the maxillary bone, but it is difficult to stably excavate this area using a conventional excavator.

In particular, the bone of the maxilla is hollow and has a roughly triangular incision, making it relatively thin and easily broken. However, there was a problem in that the upper tube could be cut or broken.

An object of the present invention is to provide a maxillary retractor that can be stably fixed to the cut bone of the maxilla, which is a relatively thin bone, and that can be easily excavated.

Means for Solving the Problems In order to achieve the above object, the present invention includes a substantially X-shaped base having an operating part and a fixing part that can be opened and closed with a fingertip via a hinge part, and 677 ;ic! An extension part in which both ends of the X-shape facing the operating part form an arc and gradually bend in the same direction as they approach each other, and one pointed end formed by bending approximately at right angles in opposite directions at the tip of this extension part. a support part,
The other shaft support, a seat plate rotatably and swingably supported on the shaft support, and a protruding receiving part provided on the seat plate having an abbreviated shape and two or more supporting parts; It was made into a maxillary retractor consisting of.

Function In the present invention, at the tips of the extensions at both ends of the X-shape facing the operating section, one end is a point-like support part, and the other end is a pivot support part, and the pivot support part is rotatable and swingable. It has a pivoted seat plate, and the seat plate further has an abbreviated receiving portion.

Therefore, in cases such as basilar surgery, in order to make a horizontal cut through the maxillary bone and open this incision, one of the pointed supports of the X-shaped tip must be placed on top of the relatively solid bone at the base of the jaw. At the same time, you can place it on the maxillary bone, which is a roughly triangular hollow cut out from the other seat plate, and fix it with the oval-shaped receiving part, and then operate the operating part in the closing direction. .

The seat plate is rotatably and swingably supported by the shaft support at the tip of the extension, so it can be finely adjusted depending on the condition of the cut FF11 bone, and can be stably fixed to the bone. ,
An abbreviated receiver on the seat plate fits snugly into the bone of the cavity to enhance stability.

Since the substantially X-shaped base has a fixing part as well as an operating part, the open-cut state can be maintained by setting it to non-return rotation like a latch shape.

EXAMPLE Hereinafter, an example of a maxillary retractor will be described with reference to one drawing.

1 is a substantially X-shaped base, has an operating part 2.2 and a fixing part 3, and can be opened and closed via a hinge part 4. The operation part 2.2 is inserted with a fingertip and faces
The upper part of the character shape can be opened and closed, and the fixing part 3 is, for example, the working part 2.
．． An arc-shaped rack part 3a fixed to one of the operating parts 2 and a rack lever 3b that can be engaged with the rack part 3a and prevented from returning back, and a rack lever 3b that is pivotally supported on the other operating part 2 and elastically engaged with the rack lever 3b. It consists of a flat spring 3c.

Reference numeral 5 denotes an extension part, in which both ends of an X-shape facing the operating part 2.2 via the hinge part 4 from the base part 1 are gradually bent in the same direction while drawing an arc and approaching each other. Reference numeral 6 denotes a tip-shaped support portion, and numeral 7 denotes a shaft support. These support portions 6 and shaft support 7 are bent approximately at right angles in opposite directions at the tip of the extension portion 5. It is formed. Reference numeral 8 denotes a seat plate, which is rotatably and swingably supported by the shaft support 7, and has an abbreviated shape and a seat plate 9.

When a fingertip is inserted into the operating portion 2.2 and a force is applied in the closing direction, the approximately X-shaped base portion l rotates around the hinge portion 4, and the extension portions 5, 5 open. At this time, in the fixed part 3, the rack 3
The engagement between the rack lever 3b and the rack lever 3b and the elastic force of the leaf spring 3c prevent it from returning to the opposite direction, and the open state can be maintained.

If the rack lever 3b is rotated by the shaft support and the rack is disengaged, the rack can be returned to its original state and the extension portion 5.5 is closed.

Since the extension parts 5.5 each form an arc and gradually bend in the same direction, it becomes easier to insert the seat plate 8 attached to the tip-shaped support part 6 and the pivot support part 7 into the mouth during surgery. There is.

After insertion, the support part 6 is fixed by placing it on the bottom bone during the day, and the tip is fixed by placing it on the approximately triangular corner of the cut bone using the seat plate 8 and the abbreviated receiving part 9. becomes stable, and the operation part 2
When the extension 5.5 is opened, the incision opens and the operation on the base of the brain becomes easier.

FIG. 4 shows a state in which the mouth opening device according to the present invention is inserted into the left and right sides of the mouth and the mouth is retracted. IO indicates the lower jaw, +1 indicates the upper jaw, and I2 indicates the mouth opening devices attached to the left and right mouths.

5 and 6 are enlarged perspective views of the shaft support 7, the seat plate 8, and the oval-shaped receiving portion 9 provided at the tip of the extension portion 5. Since the seat plate 8 is rotatably and swingably supported by the shaft support 7, it is stabilized by being placed against the approximately triangular hollow portion of the bone obtained by cutting the upper jaw in the horizontal direction. At the same time, this relatively thin bone can be fixed and opened without cutting or breaking the bone.

In the illustrated example, the support part 6 is provided on the right side, and the shaft support 7, seat plate 8, and oval-shaped receiving part 9 are provided on the left side, but an arrangement in which the right and left sides are reversed may also be used.

Further, although the shape of the seat plate is rectangular in the illustrated example, it is not limited to this and may be circular. Also, in the illustrated example, the abbreviated-shaped receiving part has two small pieces standing upright, but it is not limited to this, and it can be L-shaped as long as it comes into contact with the bone cut part and provides stability. Not limited to. Therefore, it is possible to use a cross-shaped receiving part or a protruding receiving part having two or more supporting parts so that it can be stably fixed together with the seat plate.

Effects of the Invention Since the maxillary retractor of the present invention has the above-described configuration,
An extension part that gradually bends in the same direction while drawing a circular arc from the approximately X-shaped base can be easily inserted into the mouth, and a pointed support part and seat plate are formed at the tip of this extension part. With the abbreviated-shaped receiving part, one supporting part is placed on the grown bone of the lower jaw, and the seat plate and the abbreviated-shaped receiving part are in contact with the other bone of the maxilla, so that it is stably fixed. Now I can do it. The seat plate can be rotated and swung on the shaft support, and can swing freely depending on the position, shape, and direction of the cut bone in the maxilla, so that it can receive sufficient force during excavation. It has become. Therefore, during surgery, cutting can now be easily performed by operating the operating section.

[Brief explanation of the drawing]

Fig. 1 is a front view of the maxillary retractor of the present invention, Fig. 2 is a front view showing the extension part open, Fig. 3 is a perspective view of the same retractor, and Fig. 4 is loading into the mouth from the left and right sides. Fig. 5 is a front view showing the seat plate and the abbreviated receiving part, Fig. 6 is a perspective view of the same shown in a different viewing direction, and Fig. 7 is a conventional maxillary open cut. It is a front view of a container.

Claims (1)

[Claims] A substantially X-shaped base having an operating part and a fixing part that can be opened and closed with a fingertip via a hinge part, and both ends of the X-shape facing the operating part from this base gradually bend in the same direction while forming an arc. An extension part that approaches each other, one pointed support part formed by bending at the tip of this extension part at approximately right angles in opposite directions, and the other pivot part, which can be rotated and rocked. A maxillary retractor comprising: a seat plate pivotally supported by the seat plate; and a protruding receiving portion provided on the seat plate that is approximately L-shaped and has two or more supporting portions.