CN214104582U - Novel pubis combined dissection bone fracture plate - Google Patents

Abstract

The utility model discloses a novel pubis combined dissection bone fracture plate, which relates to the field of medical appliances and comprises a bone fracture plate main body, wherein two ends of the bone fracture plate main body are connected with two bone fracture plate support arms, the bone fracture plate main body is provided with six first oval common screw holes in a penetrating way, the bone fracture plate support arms are respectively provided with two first round locking screw holes and one second oval common screw hole in a penetrating way, the side surfaces of the bone fracture plate support arms are provided with a plurality of first pre-bending grooves, the side surface of the bone fracture plate main body is fixedly connected with a side arm structure, the bone fracture plate is of an integrated structure, the three-dimensional space fixation of the bone fracture plate can be realized through common screws and locking screws, the stability of the fixation of the front ring fracture of the pelvis is greatly improved, and the trauma of the bone fracture plate in clinical application is smaller, the operation time is shorter through different designs of the size and the shape of the bone fracture plate, less bleeding during operation and benefit the early recovery of patients.

Description

Novel pubis combined dissection bone fracture plate

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a novel pubis unites dissection coaptation board.

Background

Tile B-type pelvic injury is characterized by rotational instability, no significant displacement in the vertical direction, lateral displacement of 1cm or more caused by rotational violence on an X-ray plain, which can be confirmed by clinical examination, special X-ray plain, CT, etc., and rotational instability can be classified into two types: outward rotation type (B1 type), inward rotation type (B2 type). Wherein the common mechanism of Tile B1 type pelvis injury is extrusion of fore-and-aft direction violence to the pelvis or the exogenic violence through the hip joint, pubis joint separation under the exogenic action, pubis upper and lower branch fracture, the outward rotary displacement of pelvis, one-way or two-way "book appearance" injury promptly, like opening this book, when the treatment, often use corresponding fixing device to fix the pelvis, traditional fixing device is when treating Tile B type pelvis injury, stability is relatively poor, and the operation wound is great, be unfavorable for the patient to resume, for this reason we have proposed a novel pubis and have united the dissection coaptation board and solve above problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a novel pubis united dissection bone fracture plate.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a novel pubis is jointly dissected coaptation board, includes the coaptation board main part, its characterized in that, two coaptation board support arms are connected respectively to the both ends of coaptation board main part, the coaptation board main part runs through and has seted up six first oval ordinary screw holes, the coaptation board support arm runs through respectively and has seted up two first circular locking screw holes and an oval ordinary screw hole of second, the side of coaptation board support arm is provided with a plurality of first grooves that prebend, the side fixedly connected with side arm structure of coaptation board main part.

Preferably, the side arm structure is any one of an a-type side arm and a B-type side arm.

Preferably, the A-shaped side arm comprises two first side arms fixedly connected to the front side face of the bone fracture plate main body, the first side arms are respectively provided with two second circular locking screw holes and a third oval common screw hole in a penetrating mode, and the side face of each first side arm is provided with a plurality of second pre-bending grooves.

Preferably, the B-shaped side arm comprises two second side arms fixedly connected to the rear side face of the bone fracture plate main body, the second side arms are respectively provided with a third circular locking screw hole and a fourth oval common screw hole in a penetrating mode, and the side face of the second side arm is provided with a third pre-bending groove.

Preferably, the first side arm has a length specification of 20mm, a width specification of 10mm and a thickness specification of 1.5mm, the third oval ordinary screw hole has a major diameter specification of 6mm and a minor diameter specification of 4mm, and the second circular locking screw hole has a diameter specification of 3.5 mm.

Preferably, the length specification of the second side arm is 12mm, the width specification is 10mm, the thickness specification is 1.5mm, the major diameter specification of the fourth oval ordinary screw hole is 6mm, the minor diameter specification is 4mm, and the diameter specification of the third round locking screw hole is 3.5 mm.

Preferably, the major diameter of the first oval ordinary screw hole is 6mm, and the minor diameter is 4 mm.

Preferably, the bone plate main body is slightly arched, the width specification of the bone plate main body is 10mm, the length specification of the bone plate main body is 50-55mm, the thickness specification of the bone plate main body is 1.5mm, the width specification of the bone plate support arm is 10mm, the length specification of the bone plate support arm is 35-40mm, and the thickness specification of the bone plate support arm is 1.5 mm;

the utility model has the advantages that: the utility model discloses in, coaptation board main part, coaptation board support arm, side arm are as an organic whole, and the cooperation uses ordinary screw and locking screw to form the three-dimensional fixed to the damage of pelvis front ring, have promoted fixed stability greatly, and through the size and the shape design of butt joint bone plate for this coaptation board accords with pelvis front ring surface dissection, can assist pelvis front ring fracture in clinical use and reset, and reducible moulding to the coaptation board shortens the operating time, alleviates the operation wound, and then patient's recovery with higher speed.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 2 is a schematic side arm structure diagram according to embodiment 1 of the present invention.

Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.

Fig. 4 is a schematic side arm structure diagram according to embodiment 2 of the present invention.

Fig. 5 is a model of an a-shaped side arm bone fracture plate according to embodiment 1 of the present invention.

Fig. 6 is a B-shaped side arm bone fracture plate model according to embodiment 2 of the present invention.

Reference numbers in the figures: the bone fracture plate comprises a bone fracture plate main body 1, a bone fracture plate support arm 2, a first side arm 3, a first elliptic common screw hole 4, a first pre-bending groove 5, a first circular locking screw hole 6, a second elliptic common screw hole 7, a third elliptic common screw hole 8, a second circular locking screw hole 9, a second side arm 10, a third circular locking screw hole 11, a fourth elliptic common screw hole 12, a second pre-bending groove 13 and a third pre-bending groove 14.

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.

Example 1

Referring to fig. 1-2, a novel pubic symphysis bone fracture plate comprises a bone fracture plate main body 1 and is characterized in that two ends of the bone fracture plate main body 1 are respectively connected with two bone fracture plate support arms 2, six first oval common screw holes 4 are formed in the bone fracture plate main body 1 in a penetrating manner, two first round locking screw holes 6 and one second oval common screw hole 7 are formed in the bone fracture plate support arms 2 in a penetrating manner, a plurality of first pre-bending grooves 5 are formed in the side surface of each bone fracture plate support arm 2, and a side arm structure is fixedly connected to the side surface of the bone fracture plate main body 1;

furthermore, the side arm structure is any one of an A-type side arm and a B-type side arm;

further, the major diameter of the first oval ordinary screw hole 4 is 6mm, and the minor diameter is 4 mm;

further, the bone plate main body 1 is slightly arched, the width specification of the bone plate main body 1 is 10mm, the length specification of the bone plate main body is 50-55mm, the thickness specification of the bone plate main body is 1.5mm, the width specification of the bone plate support arm 2 is 10mm, the length specification of the bone plate support arm is 35-40mm, and the thickness specification of the bone plate support arm is 1.5 mm;

further, in the embodiment, the side arm structure is an a-shaped side arm, the a-shaped side arm includes two first side arms 3 fixedly connected to the front side surface of the bone fracture plate main body 1, the first side arms 3 are respectively provided with two second circular locking screw holes 9 and a third elliptical common screw hole 8 in a penetrating manner, and the side surface of the first side arm 3 is provided with a plurality of second pre-bending grooves 13;

furthermore, the length specification of the first side arm 3 is 20mm, the width specification is 10mm, the thickness specification is 1.5mm, the major diameter specification of the third oval common screw hole 8 is 6mm, the minor diameter specification is 4mm, and the diameter specification of the second round locking screw hole 9 is 3.5 mm;

a novel pubis combined anatomical bone plate is designed by the following method:

s1: collecting 200 normal adult pelvis thin-layer CT data, 100 male and female respectively, and reconstructing a pelvis three-dimensional model by using a computer;

s2: the following data were measured: the pubic tubercle spacing, the obturator foramen inner edge spacing, the pubic symphysis upper and lower distance, the suprapubic length from the middle point of the external edge of the pubic tubercle to the external edge of the obturator foramen, the pubic symphysis spacing, the included angle between the axis of the suprapubic plane and the axis of the suprapubic, the included angle between the suprapubic symphysis and the coronal plane, the maximum upper and lower diameters and the anteroposterior diameter of the suprapubic symphysis, and are arranged in ascending order according to the pubic tubercle spacing plus the arc length from the bilateral pubic tubercles to the external edge of the obturator foramen;

s3: selecting medians in the intervals of 0-33%, 33-66% and 66-100% of male and female respectively as standard pelvis selection references, correspondingly selecting 3 cases of standard pelvises with different sexes, storing and establishing a pelvis model in a point cloud format, carrying out finite element analysis on the pelvis model, analyzing different fixing modes, and analyzing stress distribution and integral displacement distribution of vertical static analysis, front-back static analysis and lateral static analysis under three static modes;

s4: establishing a reference surface of an A-type bone fracture plate and a reference surface of a B-type bone fracture plate which correspond to the positions of pubic bones by using a computer;

s5: fine-adjusting the control points to enable the reference surface of the bone fracture plate to be attached to the anatomical shape of the pubic bone surface;

s6: a first oval common screw hole 4 is added on the bone fracture plate main body 1, and a first round locking screw hole 6, a second oval common screw hole 7 and a first pre-bending groove 5 are added on the bone fracture plate support arm 2;

s7: a second circular locking screw hole 9, a third elliptical common screw hole 8 and a second pre-bending groove 13 are added on the first side arm 3, and a third circular locking screw hole 11, a fourth elliptical common screw hole 12 and a third pre-bending groove 14 are added on the second side arm;

specifically, when the bone fracture plate is designed, 200 cases of pelvis thin-layer CT data of normal adults are collected, 100 cases of men and women are respectively collected, a pelvis three-dimensional model is reconstructed by using Mimics software, and the following parameters are measured: pubic tubercle interval, obturator inner edge interval, pubic tubercle joint upper and lower distance, length, pubic symphysis interval, pubic symphysis upper support axis contained angle, the pubic symphysis included angle with the coronal plane, the biggest upper and lower footpath, the fore and aft footpath of going up on the pubic symphysis to the pubic tubercle outer edge midpoint to the obturator outer edge. Arranging the interval between pubic tubercles and the arc lengths from bilateral pubic tubercles to the outer edge of obturator foramen in ascending order, selecting medians between 0-33%, 33-66% and 66-100% of intervals of men and women as standard pelvis selection references, correspondingly selecting 3 cases of standard pelvises with different sexes, storing and establishing a pelvis model in a point cloud format, carrying out finite element analysis on the pelvis model, analyzing different fixing modes, and analyzing stress distribution and integral displacement distribution of vertical static analysis, front-back static analysis and lateral static analysis in three static modes;

the results of 200 cases of anatomical measurements of pelvic specimens on pubic symphysis and suprapubic ramus show that: 48.93 + -5.51 mm pubic tubercle spacing male is smaller than 54.45 + -5.15 mm female, 35.87 + -4.04 mm suprapubic tubercle length male is smaller than 37.62 + -5.31 mm female, 120.68 + -10.66 mm pubic tubercle spacing + bilateral pubic tubercle to obturator lateral limbus male is smaller than 124.70 + -11.93 mm female, 46.67 + -4.02 mm obturator internus spacing male is smaller than 55.17 + -4.46 mm female, 135.67 + -4.83 mm angle between suprapubic symphysis plane axis and suprapubic symphysis axis male is smaller than 137.53 + -4.46, all the above measured data are significantly different between men and women (P < 0.05), 39.77 + -4.12 mm suprapubic symphysis male is larger than 36.76 + -4.21 mm, significant difference between men and women (P < 0.05), the pubic tubercle spacing + bilateral tubercle to obturator limbus male is used as standard reference, the pelvic height measurement is arranged in 0-33%, and the pelvic measurement results are arranged in ascending order of 0-33%, and are 66%, taking the median of the interval of 66-100% as a standard pelvis selection basis;

the static analysis in the vertical direction shows that the maximum displacement is 0.357mm in sequence, the maximum displacement is positioned at the posterior part of the iliac crest on the right side and the sacroiliac joint, and the maximum stress value borne by the pelvis is 22.23 MPa;

the front and back static analysis shows that the maximum displacement is 0.192mm in sequence, the maximum displacement is positioned at the pubic symphysis part, and the maximum stress value of the pelvis is 50.46 MPa.

The lateral static analysis shows that the maximum displacement is 1.018mm in sequence, the maximum displacement is positioned in the front part of the right iliac crest, and the maximum stress value borne by the pelvis is 20.30 MPa;

example 2

Referring to fig. 3-4, the difference between this embodiment and real-time embodiment 1 is that the side arm structure is a B-type structure, the B-type side arm includes two second side arms 10 fixedly connected to the rear side surface of the bone fracture plate main body 1, the second side arms 10 are respectively provided with a third circular locking screw hole 11 and a fourth elliptical common screw hole 12 in a penetrating manner, and the side surface of the second side arm 10 is provided with a third pre-bending groove 14;

further, the length specification of the second side arm 10 is 12mm, the width specification is 10mm, the thickness specification is 1.5mm, the long diameter specification of the fourth oval ordinary screw hole 12 is 6mm, the short diameter specification is 4mm, and the diameter specification of the third round locking screw hole 11 is 3.5 mm;

the other parts in this embodiment are the same as in embodiment 1;

in the embodiment, the maximum displacement is 0.362mm through vertical static analysis, the maximum displacement is positioned at the posterior part of the right iliac crest and the sacroiliac joint, and the maximum stress value borne by the pelvis is 12.75 MPa;

the front and back static analysis shows that the maximum displacement is 0.505mm, the maximum displacement is positioned at the pubic symphysis part, and the maximum stress value borne by the pelvis is 52.57 MPa;

lateral static analysis showed a maximum displacement of 1.133mm, the maximum displacement was in the anterior part of the right iliac crest, the maximum stress value experienced by the pelvis was 28.43MPa, and the maximum stress value experienced by the fixator was 220.40 MPa.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (8)

1. The utility model provides a novel bone fracture plate is dissected in symphysis of pubis, includes bone fracture plate main part (1), its characterized in that, two bone fracture plate support arms (2) are connected respectively at the both ends of bone fracture plate main part (1), bone fracture plate main part (1) is run through and has been seted up six first oval ordinary screw holes (4), bone fracture plate support arm (2) are run through respectively and have been seted up two first circular locking screw hole (6) and a second oval ordinary screw hole (7), the side of bone fracture plate support arm (2) is provided with a plurality of first groove (5) of bending in advance, the side fixedly connected with side arm structure of bone fracture plate main part (1).

2. A novel pubic symphysis plate according to claim 1, wherein the side arm structure is either an a-type side arm or a B-type side arm.

3. The novel pubis symphysis bone plate according to claim 2, wherein the a-shaped side arms comprise two first side arms (3) fixedly connected to the front side surface of the bone plate body (1), the first side arms (3) are respectively provided with two second circular locking screw holes (9) and a third elliptical common screw hole (8) in a penetrating manner, and the side surface of the first side arm (3) is provided with a plurality of second pre-bending grooves (13).

4. The novel pubis symphysis plate as claimed in claim 2, wherein the B-shaped side arms comprise two second side arms (10) fixedly connected to the back side of the plate body (1), the second side arms (10) respectively have a third circular locking screw hole (11) and a fourth elliptical common screw hole (12) formed therethrough, and the side of the second side arm (10) has a third pre-bending groove (14).

5. A new pubic symphysis plate according to claim 3, characterized in that the first side arm (3) has a length dimension of 20mm, a width dimension of 10mm and a thickness dimension of 1.5mm, the third elliptical normal screw hole (8) has a major diameter dimension of 6mm and a minor diameter dimension of 4mm, and the second circular locking screw hole (9) has a diameter dimension of 3.5 mm.

6. A novel pubic symphysis plate according to claim 4, wherein the second side arm (10) has a length dimension of 12mm, a width dimension of 10mm and a thickness dimension of 1.5mm, the fourth oval regular screw hole (12) has a major diameter dimension of 6mm and a minor diameter dimension of 4mm, and the third circular locking screw hole (11) has a diameter dimension of 3.5 mm.

7. A new pubic symphysis plate according to claim 1, characterized in that the first oval ordinary screw hole (4) has a major dimension of 6mm and a minor dimension of 4 mm.

8. The novel pubic symphysis plate as claimed in claim 1, wherein the plate body (1) is slightly arched, and the plate body (1) has a width dimension of 10mm, a length dimension of 50-55mm and a thickness dimension of 1.5mm, and the plate support arm (2) has a width dimension of 10mm, a length dimension of 35-40mm and a thickness dimension of 1.5 mm.

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