CN105426608A - Characteristic parameter based bone fracture plate serial design method - Google Patents
Characteristic parameter based bone fracture plate serial design method Download PDFInfo
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Abstract
The invention discloses a characteristic parameter based bone fracture plate serial design method. The method is characterized by comprising a first step of parameterizing a bone model; a second step of parameterizing a fitting surface of a bone fracture plate; and a third step of establishing a mapping relation between a bone characteristic model and the characteristic of the fitting surface of the bone fracture plate so as to generate a series of fitting surfaces of the bone fracture plate according to bone models of different parameters. In the first step, a bone curved surface model is established based on an average point cloud model including statistic information, and parametric representation is performed on the bone curved surface model so as to generate the bone characteristic model. In the second step, the fitting surface of the bone fracture plate is reconstructed with a characteristic line as the center, and parameter configuration is performed on the fitting surface of the bone fracture plate so as to generate the characteristic of the fitting surface. According to the method, multiple types of serial bone fracture plates suitable for bones of patients can be rapidly designed, number of times of adjusting of the bone fracture plate in operation is reduced, and the method has significance for improvement of quality and efficiency of the bone fracture plate design.
Description
Technical field
The present invention relates to a kind of digital orthopaedic technique, be specifically related to a kind of bone plate Design Methods for Series of feature based parameter, the invention belongs to field of computer aided design.
Background technology
The formation of numeral orthopaedics concept impels bone plate to become the general instrument of clinical treatment bone fracture and pathology.Bone plate must coincide with trouble bone surface and can keep certain topological features, and therefore its design is the important step of orthopaedics computer-aided design (CAD).
Skeleton is of a great variety, and same bone exists the differences such as age, sex, region.Consider personalized design length consuming time, the conditionality factor such as expensive, manufacturer produces eurypalynous a series of bone plate in batches in advance for doctor's choice for use.But due to the restriction of historical reasons and technical merit, current domestic bone plate manufacturer mainly carries out producing in serial form according to external skeleton parameter.Obviously, compatriots and external skeleton parameter differ greatly, though clinician repeatedly contrast, moulding, surgical effect still allows of no optimist.Meanwhile, bone surface shows as complicated curved surface, and fracture otherness is large, even if the model of bone plate is got enough thin by bone plate manufacturer, the anastomose property of bone plate binding face and wound bone surface is still undesirable.Above problem has in fact become the bottleneck problem of orthopedic medical device manufacturing enterprise of current China.
For many years, the personalized design of bone plate makes orthopedist and bone plate manufacturer have accumulated a large amount of compatriots' skeleton data, and Corpus--based Method analysis obtains equalization skeleton model.Meanwhile, bone plate binding face has identical structure and the different curved surface of parameter, is particularly suitable for parameter characteristic design.
Summary of the invention
For solving the deficiencies in the prior art, the present invention provides a kind of bone plate Design Methods for Series of feature based parameter, first, generates curved surface features model based on average skeleton point cloud model by reverse-engineering and parameter configuration; Secondly, curved surface features technology and parametric technology are dissolved into the foundation of bone plate binding face feature; Finally, according to unique point, set up the mapping relations of bone parameters and bone plate binding face parameter, synthetic time series bone plate binding face.Through post-processed, synthetic time series bone plate.The technical scheme adopted is as follows:
A bone plate Design Methods for Series for feature based parameter, is characterized in that, comprise the steps:
Step one: the parametrization of skeleton model;
Build bone surface model based on the equalization point cloud model containing statistical information, and Parametric Representation generation skeleton character model is carried out to it;
Step 2: the parametrization of bone plate binding face;
Centered by characteristic curve, reconstruct bone plate binding face, and parameter configuration generation binding face feature is carried out to it;
Step 3: set up the mapping relations between skeleton character model and bone plate binding face feature, realizes the skeleton model synthetic time series bone plate binding face according to different parameters.To bone plate binding face post-processed synthetic time series bone plate.
Aforesaid step one comprises:
Step 1a: the definition of bone curved surface features;
According to bone regional area anatomical function and surface configuration, bone surface feature is divided.Radius curved surface features can be divided into: caput radii, radius neck, tuberositas radii, body of radius and distal radius;
Step 1b: the foundation of skeleton character model; Measure a series of being easy to of bone surface definition, having and dissect parameter between semantic feature intrinsic parameter and feature.
Aforesaid step 2 comprises:
Step 2a: the reconstruct of bone plate binding face;
Choosing area-of-interest at skeleton model, take characteristic curve as unit, in conjunction with surface forming mode (as filled) reconstructed surface and by it as bone plate binding face;
Step 2b: the foundation of bone plate binding face feature;
Adopt three layer parameter two-stage mapping structures, the characteristic parameter of bone plate binding face is divided into from high level to bottom higher level parameters, middle layer parameter and bottom parameter, and sets up correlation map and restriction relation respectively between three layer parameters.
Aforesaid step 3 comprises:
Step 3a: set up the mapping relations between unique point;
Set up region of interest border line feature point and bone plate binding face edge feature point on skeleton character model respectively, and the relation on skeleton character model between area-of-interest supplemental characteristic point and bone plate binding face supplemental characteristic point;
Step 3b: production seriation bone plate;
According to the skeleton model synthetic time series bone plate binding face of different parameters.To bone plate binding face post-processed synthetic time series bone plate.
In aforesaid step 1b, for radius, described feature intrinsic parameter comprises:
1) caput radii characteristic parameter: head maximum transverse diameter, a maximum radius vector, grease head highness, the facies articularis capituli degree of depth;
2) radius neck characteristic parameter: upper end transverse diameter, upper end radius vector, neck transverse diameter, neck radius vector, lower end transverse diameter, lower end radius vector, neck height;
3) bone tuberosity characteristic parameter: tuberosity is high, tuberosity is long, tuberosity is wide;
4) body of radius characteristic parameter: key high, dry shaft angle, dry middle part week, lower end transverse diameter, lower end radius vector;
5) distal radius characteristic parameter: oar lateral column is high, intermediolateral column is high, hang down distance, width;
Between described feature, parameter comprises: neck is high, greatly enhance most, far-end is long.
The reconstruct of binding face described in aforesaid step 2a refers to:
First, the boundary line according to drawing on skeleton character model is selected area-of-interest, is split by area-of-interest simultaneously and obtains source curved surface;
Then, source curved surface utilizes characteristic curve intrinsic on algorithm identification curved surface, simultaneously manual Interactive Visualization supplemental characteristic line;
Finally, according to the characteristic curve obtained on the curved surface of source, surface forming mode (as filled) is adopted to reconstruct the new curved surface similar to source curved surface as bone plate binding face.
The mapping relations set up in aforesaid step 3a between unique point refer to:
First, set up the initial corresponding relation of unique point set in unique point set on skeleton character model and the bone plate binding face feature that reconstructs, on skeleton character model, unique point set is denoted as set1; In bone plate binding face feature, unique point set is denoted as set2;
Secondly, during the generation deformation of skeleton character model, readjust the new feature point set set2 ' that set2 obtains in bone plate binding face feature;
Finally, based on set2 ' generating feature line, then completed the structure of new bone plate binding face by characteristic curve and surface forming mode (as filled).
Usefulness of the present invention is: the bone plate Design Methods for Series of described a kind of feature based parameter is applied to Medical orthopaedic operation and manufactures field with medical devices, to improve plate design efficiency and surgical quality significant.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention;
Fig. 2 is radius curved surface features definition schematic diagram;
Fig. 3 is that radius characteristic model sets up schematic diagram;
Fig. 4 is distal radial palmar bone fracture plate binding face reconstruct schematic diagram;
Fig. 5 is that distal radial palmar bone fracture plate binding face feature sets up schematic diagram;
Fig. 6 is the initial corresponding relation schematic diagram of unique point in skeleton character model and bone plate binding face feature;
Fig. 7 is that new bone plate binding face generates schematic diagram;
Fig. 8 carries out producing in serial form schematic diagram according to special parameter to distal radial palmar bone fracture plate.
Embodiment
Below in conjunction with the drawings and specific embodiments, concrete introduction is done to the present invention.
As shown in Figure 1, a kind of bone plate Design Methods for Series of feature based parameter, comprises the steps:
Step one: the parametrization of skeleton model;
Build bone surface model based on the equalization point cloud model containing statistical information, and Parametric Representation generation skeleton character model is carried out to it;
Step 1a: the definition of bone curved surface features;
According to bone regional area anatomical function and surface configuration, bone surface feature is divided.As shown in Figure 2, radius curved surface features can be divided into: caput radii, radius neck, tuberositas radii, body of radius and distal radius;
Step 1b: the foundation of skeleton character model;
Measure a series of being easy to of bone surface definition, having and dissect parameter between semantic feature intrinsic parameter and feature.As shown in Figure 3, for radius, aforesaid feature intrinsic parameter comprises:
1) caput radii characteristic parameter: head maximum transverse diameter (H
cd), a maximum radius vector (H
sd), grease head highness (H
h), the facies articularis capituli degree of depth (H
d);
2) radius neck characteristic parameter: upper end transverse diameter (N
tpcd), upper end radius vector (N
tpsd), neck transverse diameter (N
cd), neck radius vector (N
sd), lower end transverse diameter (N
bpcd), lower end radius vector (N
bpsd), neck height (N
h);
3) bone tuberosity characteristic parameter: the high (T of tuberosity
h), the long (T of tuberosity
l), the wide (T of tuberosity
w);
4) body of radius characteristic parameter: key high (S
h), dry shaft angle (S
a), dry middle part week (C
s), lower end transverse diameter (S
bpcd), lower end radius vector (S
bpsd);
5) distal radius characteristic parameter: the high (C of oar lateral column
rh), the high (C of intermediolateral column
mh), hang down apart from (L), width (W);
Between described feature, parameter comprises: the high (H of neck
hm), greatly enhance (H), far-end long (L) most.
Step 2: the parametrization of bone plate binding face;
Centered by characteristic curve, reconstruct bone plate binding face, and parameter configuration generation binding face feature is carried out to it;
Step 2a: the reconstruct of bone plate binding face;
Choosing area-of-interest at skeleton model, take characteristic curve as unit, in conjunction with surface forming mode (as filled) reconstructed surface and by it as bone plate binding face;
As shown in Figure 4, the reconstruct of aforesaid binding face refers to: first, according to the boundary line of drawing on skeleton character model area-of-interest is selected to (area-of-interest a), splits simultaneously and obtains source curved surface (Fig. 4 b) by Fig. 4; Then, source curved surface utilizes characteristic curve intrinsic on algorithm identification curved surface, simultaneously manual Interactive Visualization supplemental characteristic line (Fig. 4 c);
Finally, according to the characteristic curve obtained on the curved surface of source, surface forming mode (as filled) is adopted to reconstruct the new curved surface similar to source curved surface as bone plate binding face (Fig. 4 d).
Step 2b: the foundation of bone plate binding face feature;
As shown in Figure 5, adopt three layer parameter two-stage mapping structures, the characteristic parameter of bone plate binding face is divided into from high level to bottom higher level parameters, middle layer parameter and bottom parameter, and sets up correlation map and restriction relation respectively between three layer parameters.
Step 3: set up the mapping relations between skeleton character model and bone plate binding face feature, realizes the skeleton model synthetic time series bone plate binding face according to different parameters.To bone plate binding face post-processed synthetic time series bone plate.
Step 3a: set up the mapping relations between unique point;
Set up region of interest border line feature point and bone plate binding face edge feature point on skeleton character model respectively, and the relation on skeleton character model between area-of-interest supplemental characteristic point and bone plate binding face supplemental characteristic point;
The aforesaid mapping relations set up between unique point refer to:
First, as shown in Figure 6, set up the initial corresponding relation of unique point set in unique point set on skeleton character model and the bone plate binding face feature that reconstructs, on skeleton character model, unique point set is denoted as set1; In bone plate binding face feature, unique point set is denoted as set2;
Secondly, during the generation deformation of skeleton character model, as shown in Figure 7, the new feature point set set2 ' that set2 obtains in bone plate binding face feature is readjusted;
Finally, based on set2 ' generating feature line, then completed the structure of new bone plate binding face by characteristic curve and surface forming mode (as filled).
Step 3b: production seriation bone plate;
According to the skeleton model synthetic time series bone plate binding face of different parameters.To bone plate binding face post-processed synthetic time series bone plate.As shown in Figure 8, for distal radial palmar bone fracture plate, respectively to total length L and width W
1, W
2, W
3and W
4, design the bone plate of seriation.
What the present invention did not further illustrate is prior art.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvement and distortion, these improve and distortion also should be considered as protection scope of the present invention.
Claims (7)
1. a bone plate Design Methods for Series for feature based parameter, is characterized in that, comprise the steps:
Step one: the parametrization of skeleton model;
Build bone surface model based on the equalization point cloud model containing statistical information, and Parametric Representation generation skeleton character model is carried out to it;
Step 2: the parametrization of bone plate binding face;
Centered by characteristic curve, reconstruct bone plate binding face, and parameter configuration generation binding face feature is carried out to it;
Step 3: set up the mapping relations between skeleton character model and bone plate binding face feature, realizes the skeleton model synthetic time series bone plate binding face according to different parameters.To bone plate binding face post-processed synthetic time series bone plate.
2. the bone plate Design Methods for Series of a kind of feature based parameter according to claim 1, it is characterized in that, described step one comprises:
Step 1a: the definition of bone curved surface features;
According to bone regional area anatomical function and surface configuration, bone surface feature is divided.Radius curved surface features can be divided into: caput radii, radius neck, tuberositas radii, body of radius and distal radius;
Step 1b: the foundation of skeleton character model; Measure a series of being easy to of bone surface definition, having and dissect parameter between semantic feature intrinsic parameter and feature.
3. the bone plate Design Methods for Series of a kind of feature based parameter according to claim 1, it is characterized in that, described step 2 comprises:
Step 2a: the reconstruct of bone plate binding face;
Choosing area-of-interest at skeleton model, take characteristic curve as unit, in conjunction with surface forming mode reconstructed surface and by it as bone plate binding face;
Step 2b: the foundation of bone plate binding face feature;
Adopt three layer parameter two-stage mapping structures, the characteristic parameter of bone plate binding face is divided into from high level to bottom higher level parameters, middle layer parameter and bottom parameter, and sets up correlation map and restriction relation respectively between three layer parameters.
4. the bone plate Design Methods for Series of a kind of feature based parameter according to claim 1, it is characterized in that, described step 3 comprises
Step 3a: set up the mapping relations between unique point;
Set up region of interest border line feature point and bone plate binding face edge feature point on skeleton character model respectively, and the relation on skeleton character model between area-of-interest supplemental characteristic point and bone plate binding face supplemental characteristic point;
Step 3b: production seriation bone plate;
According to the skeleton model synthetic time series bone plate binding face of different parameters.To bone plate binding face post-processed synthetic time series bone plate.
5. the bone plate Design Methods for Series of a kind of feature based parameter according to claim 2, is characterized in that, in step 1b, for radius, described feature intrinsic parameter comprises:
1) caput radii characteristic parameter: head maximum transverse diameter, a maximum radius vector, grease head highness, the facies articularis capituli degree of depth;
2) radius neck characteristic parameter: upper end transverse diameter, upper end radius vector, neck transverse diameter, neck radius vector, lower end transverse diameter, lower end radius vector, neck height;
3) bone tuberosity characteristic parameter: tuberosity is high, tuberosity is long, tuberosity is wide;
4) body of radius characteristic parameter: key high, dry shaft angle, dry middle part week, lower end transverse diameter, lower end radius vector;
5) distal radius characteristic parameter: oar lateral column is high, intermediolateral column is high, hang down distance, width;
Between described feature, parameter comprises: neck is high, greatly enhance most, far-end is long.
6. the bone plate Design Methods for Series of a kind of feature based parameter according to claim 3, it is characterized in that, the reconstruct of binding face described in step 2a refers to:
First, the boundary line according to drawing on skeleton character model is selected area-of-interest, is split by area-of-interest simultaneously and obtains source curved surface;
Then, source curved surface utilizes characteristic curve intrinsic on algorithm identification curved surface, simultaneously manual Interactive Visualization supplemental characteristic line;
Finally, according to the characteristic curve obtained on the curved surface of source, surface forming mode is adopted to reconstruct the new curved surface similar to source curved surface as bone plate binding face.
7. the average femur model construction method of a kind of Corpus--based Method information according to claim 4, is characterized in that, the mapping relations set up in step 3a between unique point refer to:
First, set up the initial corresponding relation of unique point set in unique point set on skeleton character model and the bone plate binding face feature that reconstructs, on skeleton character model, unique point set is denoted as set1; In bone plate binding face feature, unique point set is denoted as set2;
Secondly, during the generation deformation of skeleton character model, readjust the new feature point set set2 ' that set2 obtains in bone plate binding face feature;
Finally, based on set2 ' generating feature line, then completed the structure of new bone plate binding face by characteristic curve and surface forming mode (as filled).
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| CN106528967A (en) * | 2016-10-24 | 2017-03-22 | 河海大学常州校区 | Personalized bone plate design method based on template |
| CN106547994A (en) * | 2016-12-01 | 2017-03-29 | 哈尔滨理工大学 | A kind of composite blade plate Optimization Design based on Laminated Plate Theory |
| CN107767961A (en) * | 2017-09-26 | 2018-03-06 | 河海大学常州校区 | Towards the bone template design method of bone plate type identification |
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| CN111080772A (en) * | 2019-12-04 | 2020-04-28 | 徐州医科大学 | Convenient design method for customized bone fracture plate structural part for 3D printing |
| CN115186139A (en) * | 2022-07-08 | 2022-10-14 | 徐州医科大学 | Method for quickly searching features of attachment surface of implant based on graph structure |
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| CN105653887A (en) * | 2016-03-24 | 2016-06-08 | 河海大学常州校区 | Method for recovering damaged skeleton model based on parametric template |
| CN105957075A (en) * | 2016-04-27 | 2016-09-21 | 河海大学常州校区 | Method for generating and parameterizing average skeleton model with weight |
| CN106528967A (en) * | 2016-10-24 | 2017-03-22 | 河海大学常州校区 | Personalized bone plate design method based on template |
| CN106547994A (en) * | 2016-12-01 | 2017-03-29 | 哈尔滨理工大学 | A kind of composite blade plate Optimization Design based on Laminated Plate Theory |
| CN106547994B (en) * | 2016-12-01 | 2017-12-19 | 哈尔滨理工大学 | A kind of composite bone plate Optimization Design based on Laminated Plate Theory |
| CN107767961A (en) * | 2017-09-26 | 2018-03-06 | 河海大学常州校区 | Towards the bone template design method of bone plate type identification |
| CN107767961B (en) * | 2017-09-26 | 2021-09-24 | 河海大学常州校区 | Bone template design method for bone fracture plate type discrimination |
| CN108392270A (en) * | 2018-03-13 | 2018-08-14 | 广东工业大学 | The method of Medical bone plate digital customization |
| CN111080772A (en) * | 2019-12-04 | 2020-04-28 | 徐州医科大学 | Convenient design method for customized bone fracture plate structural part for 3D printing |
| CN115186139A (en) * | 2022-07-08 | 2022-10-14 | 徐州医科大学 | Method for quickly searching features of attachment surface of implant based on graph structure |
| CN115186139B (en) * | 2022-07-08 | 2023-07-18 | 徐州医科大学 | Rapid retrieval method for characteristics of implant joint surface based on graph structure |
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