CN100403999C - Mandibular angle shaping range limiting device and preparation method thereof - Google Patents

Abstract

The present invention relates to a device for restricting a shaping range of a mandibular angle, which comprises a spacing sheet and two fixing sheets respectively positioned on the external edge of the spacing sheet, wherein the fixing sheets are connected with the spacing sheet in a mode that the fixing sheets can bend along the external edge of the spacing sheet; the internal edge of spacing sheet matches with a predefined cutting line. The present invention also provides a manufacture method for the device for restricting a shaping range of a mandibular angle. The present invention provides the spacing sheet, so the shape of a predefined cutting range is totally identical with the actual shape. Consequently, the effects of plastic operations of mandibles can be improved.

Description

Mandibular angle shaping range limiting device and preparation method thereof

technical field

The invention relates to the field of medical plastic and cosmetic surgery, in particular to a method and an appliance which can be used to predetermine the plastic surgery range before mandibular angle plastic surgery, and can accurately indicate the predetermined plastic surgery range during the operation.

Background technique

The mandible is arched and consists of a horizontal body and a vertical ramus. The intersection of the mandibular body and ramus is called the mandibular angle. The size of the mandibular angle varies greatly from person to person, generally around 120°. It looks like there should be no obvious edges and corners. However, those with hypertrophic mandibular angles mainly include two aspects: one is that the angle of the mandibular angle is too small, showing the word "country" The face, for women, lacks beauty in terms of oriental aesthetics. The second is that the mandible is everted and thickened, making the face shape trapezoidal. For women, the mandibular angle looks like a man from the side, lacking a soft and smooth outline, and also lacking in beauty. Mandibular angle hypertrophy is not pathological, but only a developmental defect that affects the external beauty of the human body. Therefore, medical treatment is not required, but its defect can be corrected through plastic surgery.

There is no obvious large bone marrow cavity inside the mandibular angle, mainly cancellous bone, which can be used as the anatomical basis for mandibular angle plastic surgery. For the plastic surgery of mandibular angle hypertrophy, there are mainly three methods: intraoral, extraoral and combined extraoral and extraoral approaches.

At present, all known preoperative procedures for mandibular angle resection are designed through the following methods. ①Taking frontal and lateral views of the skull and panoramas of the mandible with a camera to check the degree of hypertrophy of the mandibular angle, and using a computer to simulate the effect of mandibular angle reduction surgery, the operation can be performed after obtaining the approval of the surgeon. ②Determine the range of mandibular angle resection directly on the patient's body; ③By taking X-ray films of bilateral mandibular angle bones, discuss with the surgeon to obtain a consensus on the range of osteotomy. ④ Prefabricate a variety of plexiglass templates with different angles and sizes, and select the corresponding templates according to the required osteotomy range for later use.

Since none of the above methods can obtain accurate morphological data of the subject’s mandibular angle, although it seems that the subject has fully communicated with the subject before the operation and has reached a consensus on the extent of resection, in fact neither party can quantitatively limit the extent of resection. The so-called preoperative "consensus" is just a "fuzzy" agreement that both parties lack operability (unmeasured).

In addition, in all currently known surgical procedures, the limitation of mandibular angle resection is controlled by the following methods. ①According to the approximate resection area scheduled before operation, complete the osteotomy operation based on the experience of the surgeon; ②According to the approximate resection area scheduled before operation, use the line-drawing osteotomy method, that is, draw the osteotomy line first, and then connect this line to complete the osteotomy Operation; ③According to the approximate resection range scheduled before operation, use the corresponding template to complete the osteotomy operation.

The shortcomings of the above methods ① and ② are obvious. The disadvantage of method ③ is that it cannot meet the individual differences of different patients. At the same time, because the plexiglass template cannot be close to the mandibular angle, the actual osteotomy range will have a large error from the expected one.

It can be seen that the existing technology has insurmountable defects such as the inability to accurately pre-determine the resection range and the inability to limit the resection range during the operation, as well as doctor-patient disputes.

Contents of the invention

The object of the present invention is to provide a mandibular angle shaping range limiting device and a preparation method thereof, so as to solve the problem that the existing mandibular angle resection cannot be accurately defined.

The technical solution of the present invention is to provide a device for limiting the range of mandibular angle shaping, including a limiting piece and two fixing pieces respectively located on the outer sides of the limiting piece. The way of bending is connected with the limiting piece, and the inner edge of the limiting piece matches the predetermined cutting line.

In the above-mentioned device for limiting the range of mandibular angle shaping, the outer side of the limiting piece matches the contour line of the mandibular angle.

In the above-mentioned device for limiting the range of mandibular angle shaping, the length of the horizontal part of the outer side of the limiting plate is less than the length of the mandibular body, and the length of the vertical part is less than the length of the ramus of the mandible.

In the above-mentioned device for limiting the range of mandibular angle shaping, the fixing pieces are respectively located at two ends of the outer side of the limiting piece.

In the above-mentioned device for limiting the range of mandibular angle shaping, the thickness of the limiting sheet and the fixing sheet is 0.5-2 mm.

The present invention also provides a method for preparing a device for limiting the range of mandibular angle shaping, comprising the following steps: (a) obtaining the shape data of the resection line; (b) making a limiter with the shape data of the resection line as the inner side, and Two fixing pieces respectively located on the outer side of the limiting piece, the fixing pieces are connected with the limiting piece in a way that can be bent along the outer side of the limiting piece, the inner side of the limiting piece is connected with the limiting piece Matches the intended resection line.

In the manufacturing method of the above-mentioned device for mandibular angle shaping range limitation, the step (a) further includes the step of obtaining the morphological parameters of the mandibular angle.

In the manufacturing method of the above-mentioned device for limiting the range of mandibular angle shaping, the morphological parameters of the mandibular angle are obtained by means of CT scanning.

In the above-mentioned manufacturing method of the mandibular angle shaping range limiting device, the step (b) further includes the step of making the outer side of the limiting plate matching the mandibular angle according to the mandibular angle morphological parameters.

In the above-mentioned manufacturing method of the device for limiting the range of mandibular angle shaping, the length of the horizontal part of the outer side of the limiting plate is less than the length of the mandibular body, and the length of the vertical part is less than the length of the ramus of the mandible.

The device for limiting the range of mandibular angle plastic surgery and the preparation method thereof of the present invention improve the effect of mandibular plastic surgery by providing a limiting sheet so that the shape of the predetermined resection range is completely consistent with the actual shape. In addition, due to the accurate definition of the resection line, the inferior alveolar nerve bundle in the marrow cavity of the mandible can be effectively protected from damage.

Description of drawings

Fig. 1 is a schematic diagram of the accurate excision range predetermined before operation in the present invention.

Fig. 2 is a schematic plan view of the device for limiting the range of mandibular angle shaping according to the present invention.

Fig. 3 is a schematic perspective view of the device for limiting the range of mandibular angle shaping in Fig. 2 .

Fig. 4 is a schematic view of the use state of the device for limiting the range of mandibular angle shaping according to the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, since the shape and size of the mandibular angle 1 vary from person to person, the morphological data of the resection range of the mandibular angle must first be obtained in the plastic surgery of the mandibular angle 1. Existing CT scans or X-rays can be used to obtain the morphological parameters of the mandibular angle 1 on both sides, and then with the assistance of computer plane or three-dimensional image technology, the position and shape of the planned resection range 6 of the mandibular angle 1 can be obtained, and the planned resection range 6 With cutting line 5. The process of obtaining the position and shape of the predetermined resection range 6 can be performed with reference to aesthetic and medical standards. Of course, the process of obtaining the position and shape of the resection range 6 can also be realized by directly drawing on the drawing.

The mandibular angle shaping range limiting device can be made according to the acquired morphological data of the mandibular angle 1 and the resection line 5 , and the limiting device can be made according to the mandibular angle 1 and the mandibular angle lateral plane view of the resection line 5 output at 1:1. As shown in FIG. 2 , the device for limiting the range of mandibular angle shaping includes a limiting piece 2 and two fixing pieces 3 , 4 located at the ends of the outer sides 8 of the limiting piece 2 . The fixing pieces 3, 4 are integral parts with the limiting piece 2, and they are connected to the limiting piece in a way that can be bent along the outer edge 8 of the limiting piece (as shown by the dotted line in FIG. 2 ). The inner side 7 of the limiting piece 2 matches the predetermined cutting line 5, the outer side 8 of the limiting piece 2 matches the side contour line of the mandibular angle 1, and the horizontal part of the outer side of the limiting piece 2 The length is less than the length of the mandibular body, and the length of the vertical part is less than the length of the ramus of the mandible, so that the shape and size of the limiting piece 2 are roughly consistent with the predetermined resection range 6 .

As shown in FIG. 3 , when in use, the fixing pieces 3 and 4 of the limiting device can be bent along the outer side 8 of the limiting piece 2 so as to be close to the ramus of the mandible in the vertical position and the mandibular body in the horizontal position respectively. In this embodiment, the shape of the junction between the fixing pieces 3 and 4 and the limiting piece 2 in the use state is arc-shaped.

The limiting device is selected from medical metal plates (such as stainless steel, alloy materials, etc.), and its thickness can generally be 0.5 to 2 millimeters according to the hardness of the material (it is advisable to be able to bend the fixing piece). Of course, the material and thickness of the limiting means are not limited to those described above.

As shown in Figure 4, in mandibular angle plastic surgery, the bone body is completely separated from the soft tissue on its surface (special attention should be paid to peeling off the periosteum at the lower edge of the mandible, the mandibular angle, and the posterior edge of the mandibular angle as much as possible), and then it can be placed in the The limiting device of the present invention aligns the outer edge 8 of the limiting piece 2 with the edge of the mandibular angle 1, and the fixing pieces 3, 4 are respectively placed on the rear edge and the lower edge of the mandibular angle 1, and are pushed outwards to fix it. Pieces 3 and 4 are respectively close to the posterior and inferior borders of the mandibular angle. Put the miniature bone saw into and make the saw cut along the inner side edge 7 of the stopper 2 to cut off accurately.

In addition, instead of adopting the scheme of positioning the position of the limiting device by the outer edge 8 in use, the solution of positioning the limiting device through the position of the fixing sheet may also be used. That is, the limiting device is positioned by using the bending directions of the fixing pieces 3 and 4 located at different positions on the outer side 8 of the positioning piece 2, but the positioning of this solution may not be accurate enough.

Claims (10)

1. angle of mandible shaping scope device for limiting, it is characterized in that, two stators that comprise banking stop and lay respectively at the outer side edges of banking stop, described stator is being connected with described banking stop along the mode of the outer lateral buckling of banking stop, and the inner side edge of described banking stop is complementary with predetermined excision line.

2. angle of mandible shaping scope device for limiting according to claim 1 is characterized in that the outer side edges of described banking stop and angle of mandible broadside lines are complementary.

3. angle of mandible shaping scope device for limiting according to claim 2 is characterized in that, the length of the horizontal component of described banking stop outer side edges is less than the length of lower jaw member length, the vertical component length less than mandibular ramus.

4. angle of mandible shaping scope device for limiting according to claim 1 is characterized in that described stator lays respectively at the two ends of described banking stop outer side edges.

5. angle of mandible shaping scope device for limiting according to claim 1 is characterized in that the thickness of described banking stop and stator is 0.5～2 millimeter.

6. the preparation method of an angle of mandible shaping scope device for limiting is characterized in that, may further comprise the steps:

(a) obtain excision line morphology data;

(b) making with described excision line morphology data is two stators of the banking stop of inner side edge and the outer side edges that lays respectively at banking stop, described stator is being connected with described banking stop along the mode of the outer lateral buckling of banking stop, and the inner side edge of described banking stop is complementary with predetermined excision line.

7. the preparation method of angle of mandible shaping scope device for limiting according to claim 6 is characterized in that step (a) also comprises the step of obtaining the angle of mandible morphological parameters.

8. the preparation method of angle of mandible shaping scope device for limiting according to claim 7 is characterized in that, obtains the angle of mandible morphological parameters and obtains by the CT scan mode.

9. the preparation method of angle of mandible shaping scope device for limiting according to claim 7 is characterized in that, step (b) also comprises the step of making the banking stop outer side edges of mating with angle of mandible according to described angle of mandible morphological parameters.

10. the preparation method of angle of mandible shaping scope device for limiting according to claim 9 is characterized in that, the length of the horizontal component of described banking stop outer side edges is less than the length of lower jaw member length, the vertical component length less than mandibular ramus.

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