CN105943113B - A kind of preparation method of mandibular angle bone cutting navigation template - Google Patents

A kind of preparation method of mandibular angle bone cutting navigation template Download PDF

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Publication number
CN105943113B
CN105943113B CN201610234979.8A CN201610234979A CN105943113B CN 105943113 B CN105943113 B CN 105943113B CN 201610234979 A CN201610234979 A CN 201610234979A CN 105943113 B CN105943113 B CN 105943113B
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mandibular
navigation template
osteotomy
angle
body
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CN201610234979.8A
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CN105943113A (en
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黄文华
钱堃
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南方医科大学
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Abstract

The preparation method of the mandibular angle bone cutting navigation template of the present invention, including:(1) foundation of virtual mandibular threedimensional model;(2) osteotomy line designs;(3) marking osteotomy, just just body, acquisition thicken registering body and thicken osteotomy body for body and registration;Registering body will be thickened with local Boolean calculation and thickens osteotomy body and carries out local Boolean addition computing, be made an overall navigation template and be carried out outer surface fairing processing;5th step:Obtain mandibular angle bone cutting navigation template;And open the window of a 2.5mm × 2.5mm in mandibular angle bone cutting navigation template second molar position.The preparation method of the mandibular angle bone cutting navigation template of the present invention there is mandibular angle bone cutting navigation template to prepare simple, and template carries effective registering part, can accurately determine template position.

Description

A kind of preparation method of mandibular angle bone cutting navigation template

Technical field

The present invention relates to mandibular angle bone cutting technical field, more particularly to a kind of preparation side of mandibular angle bone cutting navigation template Method.

Background technology

With the raising of living standard, beautiful demand is continuously improved in people, for orthopedic many operations It is required that it is even more to have reached a new height.Mandibular angle bone cutting orthopedic is by amputating mandibular trailing edge, angle of mandible, mandibular The method of lower edge part sclerotin is to achieve the purpose that change following contouring.It needs to carry out symmetry operation in face for such Bone-culting operation, the accuracy of osteotomy in operation, the symmetry for rear face bone of performing the operation are often to determine final shaping effect It is crucial.

Intra-oral approach is increasingly becoming without the advantages of scar in a manner of optimal operative approach, but since art area is narrow and small by it, And the stereoscopic vision of the reasons patient such as the art area visual field, visual angle is significantly limited to, and makes judgement of the patient to osteotomy line There is deviation even to slip up, unexpected fracture, the formation of the second angle of mandible, mandibular bilateral asymmetry, injury of mental nerve etc. with The relevant complication of mandibular bone also when have been reported that.The key of such issues that solution is Digital Medicine Technology and navigating surgery Development.

With the high speed development of rapid shaping technique (3D printing technique is one of which) in recent years, 3D printing makes entity mould Type it is quick be created as in order to may, the three-dimensional data obtained using CT scan is modeled, then by three-dimensional printer by entity Model prints, and doctor can simulate operation, moulding directly on threedimensional model, for doctor provide one it is familiar and true Simulation space, improve the accuracy of operation designing, facilitate the exchange and conmmunication between doctor, reduce postoperative complication, carry The q&r of high surgical operation.With the continuous progress of digitizing technique, doctor cannot be satisfied in entity mould The pre-operative surgical simulation carried out in type, for consistent, some scholars for realizing actual operation effect with simulating both surgical effects It designs and develops navigational tool and apply among actual operation.

The angle of mandible navigation template technical solution of the designs such as Rong Q is as follows:It allows patient by CT scan and gathers original number According to (DICOM format);Import data to the reconstruction that Mimics12.0 softwares carry out mandibular threedimensional model;With Middle face sagittal plane For imaging plane, by left side mandible model mirror image to right side;Row angle of mandible virtual osteotomy;Department pattern will be cut down to save as STL formatted files simultaneously import Magic RP 12.01software;Model outer surface is thickened into 2mm;Boolean is carried out with master mould Computing (Boolean operation) and then obtain navigation template model;Navigation template is printed by rapid shaping technique Come.There are following defectss for the navigation template:(1) it is only capable of implementing operation using extraoral incision, it is postoperative to leave scar.(2) navigate mould Plate, which lacks, effectively to be fixed, and the operation of instrument be easy to cause template displacement, so as to reduce the accuracy of osteotomy operation.Niansong The angle of mandible navigation template technical solution of the designs such as Ye is as follows:It allows patient by CT scan and gathers initial data;Data are led Enter the reconstruction that Mimics10.01 softwares carry out mandibular threedimensional model;Mandibular threedimensional model after reconstruction is saved as into STL lattice Formula is simultaneously directed into Freeform software12.0;Carry out one side angle of mandible virtual osteotomy;By set Middle face sagittal plane as Imaging plane by Osteotomy mirror image to offside and amputates offside angle of mandible;Model outer surface is thickened into 2.5mm;To navigate mould Plate is printed by rapid shaping technique.The angle of mandible navigation template of the designs such as Niansong Ye:(1) Intraoral incision is used Approach is fixed using " hook " shape protrusion in template, still not firm, and in actual operation operation, the operation of instrument is easy Template is caused to shift, so as to reduce the accuracy of osteotomy operation.(2) when navigation template being placed lower jaw angle surface, can not determine The template whether correct position (due to soft tissue stop etc. factors), so as to add osteotomy operation uncertainty.

Therefore, in view of the shortcomings of the prior art, to provide a kind of preparation method of mandibular angle bone cutting navigation template existing to overcome Technical deficiency is very necessary.

The content of the invention

A kind of mandibular angle bone cutting navigation template is provided it is an object of the invention to avoid the deficiencies in the prior art part Preparation method, the mandibular angle bone cutting navigation template are prepared simply, and template carries effective registering part, can accurately determine mould Board position.

The above-mentioned purpose of the present invention is realized by following technological means.

A kind of preparation method of mandibular angle bone cutting navigation template is provided, is included the following steps:

(1) the CT data of target object mandibular are gathered, and with the form importing digital three-dimensional reconstruction software of Dicom Three-dimensional lower jaw angle model is rebuild in Mimics 14.0, obtains virtual mandibular threedimensional model;

(2) for virtual mandibular threedimensional model, the lower jaw angular position of arbitrary one side is selected to carry out cutting for the side angle of mandible Bone line designs;

Using mandibular median sagittal plane as imaging plane, by mirror image operation by the lower jaw of osteotomy line mirror image to opposite side Angular position obtains the osteotomy line of opposite side lower jaw angular position;

(3) will the virtual mandibular threedimensional model stl file that obtained in (1) be imported 7.0 softwares of 3-matic to carry out down The preliminary making of jaw angle osteotomy navigation template;

It is used on virtual mandibular threedimensional model and identifies required Mandible Osteotomy die shape, label range It is the first body of osteotomy for the outside four sides cortex and its part outside plate for covering angle of mandible and the second premolar teeth of covering, first respectively Grind one's teeth in sleep lip side and part mandibular bar shaped outside plate cortex registration just body, respectively by body portion at the beginning of osteotomy and registration just body portion Two independent individuals are generated, and two parts is enable to intersect;

The first body of registration of the cortical section of the second premolar teeth, first molar lip side and part mandibular bar shaped outside plate will be covered Operation is compensated, outside entity thickens 2mm, obtains thickening registering body;

Body at the beginning of the lateral surface cortex for covering angle of mandible and its osteotomy of part outside plate is subjected to mobile curved surface operation, it is outwards real Body thickens 4mm, obtains thickening osteotomy body;

Registering body will be thickened with local Boolean calculation and thickens osteotomy body and carries out local Boolean addition computing, be made One overall navigation template;

Overall navigation template is subjected to outer surface fairing processing with Local Fairing operation, the ladder for making its junction is smooth Change, export the STL formatted files of overall navigation template;

(4) step:Virtual mandibular threedimensional model file is opened using Mimics, by the STL formatted files of navigation template It imports;

Navigation template model and virtual mandible model are subjected to boolean's subtraction, and by obtained navigation template according to The designed osteotomy line of step (2) carries out cutting operation, then navigation template two parts after cutting separate and are separated, and obtains Mandibular angle bone cutting navigation template with identical Osteotomy;Cutting finishing makes mandibular angle bone cutting navigation template ordered, and Open the window of a 2.5mm × 2.5mm in mandibular angle bone cutting navigation template second molar position.

Further, the preparation method of above-mentioned mandibular angle bone cutting navigation template further includes the printing of (5) step, is specifically: Mandibular angle bone cutting navigation template and virtual mandibular threedimensional model are printed by 3D modes.

Preferably, in above-mentioned steps (1), during three-dimensional lower jaw angle model is rebuild, by selecting bone Threshold value shows that clearly model is as virtual mandibular threedimensional model using mandibular.

Preferably, threshold range >=226 of above-mentioned bone.

Preferably, in above-mentioned steps (2), the design principle of osteotomy line is:Osteotomy line peak is no more than biteplane;It cuts Mandible incisor is avoided in the traveling of bone line;In the angle of mandible sclerotin that amputation is loose, lower jaw trailing edge is made to keep smooth song Line.

The preparation method of the mandibular angle bone cutting navigation template of the present invention, includes the following steps:(1) target object lower jaw is gathered The CT data of bone, and to rebuild three-dimensional lower jaw in the form importing digital three-dimensional reconstruction software Mimics 14.0 of Dicom Angle model obtains virtual mandibular threedimensional model;(2) virtual mandibular threedimensional model is directed to, selects the angle of mandible of arbitrary one side Position carries out the osteotomy line design of the side angle of mandible;It, will by mirror image operation using mandibular median sagittal plane as imaging plane The lower jaw angular position of osteotomy line mirror image to opposite side obtains the osteotomy line of opposite side lower jaw angular position;(3) void that will be obtained in (1) Intend mandibular threedimensional model stl file and import the preliminary making that 7.0 softwares of 3-matic carry out mandibular angle bone cutting navigation template; With required Mandible Osteotomy die shape is identified on virtual mandibular threedimensional model, label range is covering respectively The outside four sides cortex of angle of mandible and its osteotomy of part outside plate just the second premolar teeth of body and covering, first molar lip side and The registering just body of the cortex of part mandibular bar shaped outside plate, respectively by body portion at the beginning of osteotomy and the first body portion generation two of registration solely Vertical individual, and two parts is enable to intersect;It will the second premolar teeth of covering, first molar lip side and part mandibular bar shaped outside plate Cortical section registration just body compensate operation, outside entity thickens 2mm, obtains thickening registering body;Angle of mandible will be covered Lateral surface cortex and its osteotomy of part outside plate just body carries out mobile curved surface operation, outside entity thickens 4mm, obtains thickening and cut Diaphysis;Registering body will be thickened with local Boolean calculation and thickens osteotomy body and carries out local Boolean addition computing, make one A overall navigation template;Overall navigation template is subjected to outer surface fairing processing with Local Fairing operation, makes its junction Ladder smooths, and exports the STL formatted files of overall navigation template;(4) step:By navigation template model and virtual mandibular mould Type carries out boolean's subtraction, and obtained navigation template is carried out cutting operation according to the designed osteotomy line of step (2), then Navigation template two parts after cutting separate and are separated, obtain the mandibular angle bone cutting navigation mould with identical Osteotomy Plate;Cutting finishing makes mandibular angle bone cutting navigation template ordered, and opens one in mandibular angle bone cutting navigation template second molar position The window of a 2.5mm × 2.5mm.The preparation method of the mandibular angle bone cutting navigation template of the present invention has mandibular angle bone cutting navigation Template is prepared simply, and template carries effective registering part, can accurately determine template position.

Description of the drawings

Using attached drawing, the present invention is further illustrated, but the content in attached drawing does not form any limit to the present invention System.

Fig. 1 is the virtual mandibular three that a kind of preparation method embodiment 2 of mandibular angle bone cutting navigation template of the present invention is rebuild Dimension module.

Fig. 2 is overall navigation template prepared by a kind of preparation method embodiment 2 of mandibular angle bone cutting navigation template of the present invention Schematic diagram figure.

Fig. 3 is the lower jaw with registration structure prepared by a kind of preparation method of mandibular angle bone cutting navigation template of the present invention The schematic diagram of angle osteotomy navigation template.

Specific embodiment

The invention will be further described with the following Examples.

Embodiment 1.

A kind of preparation method of mandibular angle bone cutting navigation template, is carried out by following steps.

(1) the CT data of target object mandibular are gathered, and with the form importing digital three-dimensional reconstruction software of Dicom Three-dimensional lower jaw angle model is rebuild in Mimics 14.0, obtains virtual mandibular threedimensional model.

During three-dimensional lower jaw angle model is rebuild, by selecting the threshold value of bone, the threshold range of bone is 226 To between max-thresholds, show that clearly model is as virtual mandibular threedimensional model using mandibular.

(2) for virtual mandibular threedimensional model, the lower jaw angular position of arbitrary one side is selected to carry out cutting for the side angle of mandible Bone line designs;

Using mandibular median sagittal plane as imaging plane, by mirror image operation by the lower jaw of osteotomy line mirror image to opposite side Angular position obtains the osteotomy line of opposite side lower jaw angular position.

The design principle of osteotomy line is:Osteotomy line peak is no more than biteplane;Lower jaw god is avoided in the traveling of osteotomy line Through pipe;In the angle of mandible sclerotin that amputation is loose, lower jaw trailing edge is made to keep smooth curve.

(3) the virtual mandibular threedimensional model stl file obtained in (1) is imported into 7.0 softwares of 3-matic and carries out lower jaw The preliminary making of angle osteotomy navigation template;

It is used on virtual mandibular threedimensional model and identifies required Mandible Osteotomy die shape, label range It is the first body of osteotomy for the outside four sides cortex and its part outside plate for covering angle of mandible and the second premolar teeth of covering, first respectively Grind one's teeth in sleep lip side and part mandibular bar shaped outside plate cortex registration just body, respectively by body portion at the beginning of osteotomy and registration just body portion Two independent individuals are generated, and two parts is enable to intersect;

The first body of registration of the cortical section of the second premolar teeth, first molar lip side and part mandibular bar shaped outside plate will be covered Operation is compensated, outside entity thickens 2mm, obtains thickening registering body;

Body at the beginning of the lateral surface cortex for covering angle of mandible and its osteotomy of part outside plate is subjected to mobile curved surface operation, it is outwards real Body thickens 4mm, obtains thickening osteotomy body;

Registering body will be thickened with local Boolean calculation and thickens osteotomy body and carries out local Boolean addition computing, be made One overall navigation template;

Overall navigation template is subjected to outer surface fairing processing with Local Fairing operation, the ladder for making its junction is smooth Change, export the STL formatted files of overall navigation template;

(4) step:Virtual mandibular threedimensional model file is opened using Mimics, by the STL formatted files of navigation template It imports;

Navigation template model and virtual mandible model are subjected to boolean's subtraction, and by obtained navigation template according to The designed osteotomy line of step (2) carries out cutting operation, then navigation template two parts after cutting separate and are separated, and obtains Mandibular angle bone cutting navigation template with identical Osteotomy;Cutting finishing makes mandibular angle bone cutting navigation template ordered, and Open the window of a 2.5mm × 2.5mm in mandibular angle bone cutting navigation template second molar position.

The preparation method of the mandibular angle bone cutting navigation template further includes the printing of the 6th step, is specifically:Mandibular angle bone cutting is led Model plane plate and virtual mandibular threedimensional model are printed by 3D modes.

The preparation method of the mandibular angle bone cutting navigation template, navigation template, by boolean's subtraction, are formed when making The inner surface closed completely with mandibular bone face paste, it is with bone face gap minimum, largely reduce error.And by according to Designed osteotomy line carries out cutting operation, obtains the navigation template with identical Osteotomy, readily available good osteotomy Effect.The window of a 2.5mm × 2.5mm is opened in template second molar position, can effectively judge the registering situation of navigation template, Avoid the error caused by the bad registration caused by the narrow visual field.

The preparation method of the mandibular angle bone cutting navigation template passes through 7.0 software of Mimics 14.0 and 3-matic, study Curve is short, and navigation template prepares simple, preparation efficiency height.Prepared mandibular angle bone cutting navigation template adds autoregistration knot Structure convenient for the registration of navigation template, effectively improves the fixation of navigation template and the precision of bone-culting operation.

Embodiment 2.

It is elaborated with a specific example to the method for the present invention.

A kind of preparation method of mandibular angle bone cutting navigation template, is carried out by following steps.

(1) the CT data of target object mandibular are gathered, and with the form importing digital three-dimensional reconstruction software of Dicom Three-dimensional lower jaw angle model is rebuild in Mimics 14.0, behind the orientation for determining front, back, left, right, up, down, selects bone The threshold value of (226~Max, Hu) is adjusted correspondingly selected threshold value until obtaining most suitable threshold value, at this time angle of mandible Display is most clear, carries out three-dimensional reconstruction and obtains virtual mandibular threedimensional model.To virtual angle of mandible threedimensional model into edlin tune It is whole, other unrelated structures are removed, in order to avoid it influences the visual field and operation, are only retained with testing relevant virtual mandibular three-dimensional mould Type.The virtual mandibular threedimensional model established is as shown in Figure 1.

(2) osteotomy line designs:For virtual mandibular threedimensional model, the lower jaw angular position of arbitrary one side is selected to carry out the side The osteotomy line design of angle of mandible;

Using mandibular median sagittal plane as imaging plane, by mirror image operation by the lower jaw of osteotomy line mirror image to opposite side Angular position obtains the osteotomy line of opposite side lower jaw angular position.

The design principle of osteotomy line is:Osteotomy line peak is no more than biteplane;Lower jaw god is avoided in the traveling of osteotomy line Through pipe;In the angle of mandible sclerotin that amputation is loose, lower jaw trailing edge is made to keep smooth curve.

(3) Design Navigation template

The virtual mandibular threedimensional model stl file obtained in (1) is imported into 3-matic7.0 softwares and carries out angle of mandible section The preliminary making of bone navigation template;

It is used on virtual mandibular threedimensional model and identifies required Mandible Osteotomy die shape, label range It is the first body of osteotomy for the outside four sides cortex and its part outside plate for covering angle of mandible and the second premolar teeth of covering, first respectively Grind one's teeth in sleep lip side and part mandibular bar shaped outside plate cortex registration just body, respectively by body portion at the beginning of osteotomy and registration just body portion Two independent individuals are generated, and two parts is enable to intersect;

The first body of registration of the cortical section of the second premolar teeth, first molar lip side and part mandibular bar shaped outside plate will be covered Operation is compensated, outside entity thickens 2mm, obtains thickening registering body;

Body at the beginning of the lateral surface cortex for covering angle of mandible and its osteotomy of part outside plate is subjected to mobile curved surface operation, it is outwards real Body thickens 4mm, obtains thickening osteotomy body;

Registering body will be thickened with local Boolean calculation and thickens osteotomy body and carries out local Boolean addition computing, be made One overall navigation template;

Overall navigation template is subjected to outer surface fairing processing with Local Fairing operation, the ladder for making its junction is smooth Change, export the STL formatted files of overall navigation template;Designed overall navigation template is as shown in Figure 2.

(4) step:Virtual mandibular threedimensional model file is opened using Mimics, by the STL formatted files of navigation template It imports;

Navigation template model and virtual mandible model are subjected to boolean's subtraction, and by obtained navigation template according to The designed osteotomy line of step (2) carries out cutting operation, then navigation template two parts after cutting separate and are separated, and obtains Mandibular angle bone cutting navigation template with identical Osteotomy;Cutting finishing makes mandibular angle bone cutting navigation template ordered, and The window of a 2.5mm × 2.5mm is opened in mandibular angle bone cutting navigation template second molar position, as shown in Figure 3.

(4) 3D printing goes out navigation template

" Export " option is selected in menu bar, by individuation mandibular angle bone cutting navigation template and three-dimensional lower jaw angle model It is exported with " Binary STL " form type.The mandibular angle bone cutting navigation template of " STL " form is imported into photosensitive resin 3D printing Machine is sharp to make a call to 400 (Puli gives birth to company, China) mating processing software Magics18.First platform is selected to import mandibular navigation template Model:Scenes>>New Scenes>>Select " Envisiontec Perfactory (mm) " platform>>OK opens model text Part presss from both sides, and mouse drag is introduced directly into platform, the operations such as is then rotated, translated, amplified, reduced.It is moved to default location: Position>>Translate to Default Position.If model bottom is irregular, platform base can not be close to Print job is carried out, then adds support again after translating 5mm along Z axis.Then by selecting automatic addition support Support Generation>>Generation Support are set to complete the support of model.Inspection generate support it is whether reasonable, into The modification of row appropriateness.Integral inspection is carried out after finishing, completes backed off after random modification support interface, exports the file of two Stl forms, Master mould file and support file.Platform is imported, merges two models.Next according to whole repairing model mistake is suggested, directly To that can not continue to repair, remaining bad selvedge and housing mistake are put, carries out filling-up hole operation, last preservation model.

3D printer system is opened to import preservation model, it is mobile, put or zoom model, determine print position;It opens It checks status bar, clicks on platform reset, wait that " completion " window can be popped up after resetting, completed if not prompting to reset, tree Fat liquid level is less than position of platform, needs to add resin at this time, until liquid level mutually maintains an equal level or with platform more than 1~2mm of platform, fluid infusion Scraper is scraped forward afterwards while floating drum readjusts liquid level, is completed until resetting;After the completion of reset, right menu bar is pulled down, click is opened Dynamic, printer enters operating state;

Disposable glove is put on after printing, printout is taken out;It is cleaned with alcohol after taking out printout (wearing gloves), it is impossible to printout is placed in alcohol trough and is impregnated, with the multiple wiper element of cloth until surface does not stick, then uses paper handkerchief It dries or dries up and be placed in UV stoves progress secondary curing, duration 30 minutes, so as to obtain required photosensitive resin navigation template again.

Mandibular angle bone cutting operation can be carried out on fresh cadaver sample with printed mandibular angle bone cutting navigation template.

The preparation method of the mandibular angle bone cutting navigation template, navigation template, by boolean's subtraction, are formed when making The inner surface closed completely with mandibular bone face paste, it is with bone face gap minimum, largely reduce error.And by according to Designed osteotomy line carries out cutting operation, obtains the navigation template with identical Osteotomy, readily available good osteotomy Effect.The window of a 2.5mm × 2.5mm is opened in template second molar position, can effectively judge the registering situation of navigation template, Avoid the error caused by the bad registration caused by the narrow visual field.

The preparation method of the mandibular angle bone cutting navigation template passes through 7.0 software of Mimics 14.0 and 3-matic, study Curve is short, and navigation template prepares simple, preparation efficiency height.Prepared mandibular angle bone cutting navigation template adds autoregistration knot Structure convenient for the registration of navigation template, effectively improves the fixation of navigation template and the precision of bone-culting operation.

Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention rather than the present invention is protected The limitation of scope, although being explained in detail with reference to preferred embodiment to the present invention, those of ordinary skill in the art should manage Solution, technical scheme can be modified or replaced equivalently, without departing from technical solution of the present invention essence and Scope.

Claims (5)

1. a kind of preparation method of mandibular angle bone cutting navigation template, which is characterized in that include the following steps:
(1) the CT data of target object mandibular are gathered, and with the form importing digital three-dimensional reconstruction software Mimics of Dicom Three-dimensional lower jaw angle model is rebuild in 14.0, obtains virtual mandibular threedimensional model;
(2) for virtual mandibular threedimensional model, the lower jaw angular position of arbitrary one side is selected to carry out the osteotomy line of the side angle of mandible Design;
Using mandibular median sagittal plane as imaging plane, by mirror image operation by the lower jaw corner of osteotomy line mirror image to opposite side Position obtains the osteotomy line of opposite side lower jaw angular position;
(3) the virtual mandibular threedimensional model stl file obtained in (1) is imported into 7.0 softwares of 3-matic and carries out angle of mandible section The preliminary making of bone navigation template;
With required Mandible Osteotomy die shape is identified on virtual mandibular threedimensional model, label range is distinguished It is the first body of osteotomy for the outside four sides cortex and its part outside plate for covering angle of mandible and the second premolar teeth of covering, first molar The first body of registration of the cortex of lip side and part mandibular bar shaped outside plate, respectively by the just body portion generation of body portion at the beginning of osteotomy and registration Two independent individuals, and two parts is enable to intersect;
The registration just body progress of the cortical section of the second premolar teeth, first molar lip side and part mandibular bar shaped outside plate will be covered Compensating operation, outside entity thicken 2mm, obtain thickening registering body;
Body at the beginning of the lateral surface cortex for covering angle of mandible and its osteotomy of part outside plate is subjected to mobile curved surface operation, outside entity increases Thick 4mm obtains thickening osteotomy body;
Registering body will be thickened with local Boolean calculation and thickens osteotomy body and carries out local Boolean addition computing, make one Overall navigation template;
Overall navigation template is subjected to outer surface fairing processing with Local Fairing operation, smooths the ladder of its junction, Export the STL formatted files of overall navigation template;
(4) step:Virtual mandibular threedimensional model file is opened using Mimics, the STL formatted files of navigation template are imported;
Navigation template model and virtual mandible model are subjected to boolean's subtraction, and by obtained navigation template according to step (2) designed osteotomy line carries out cutting operation, then the navigation template after cutting separate and is separated, and obtains having identical section The mandibular angle bone cutting navigation template of bone plane;Cutting finishing makes mandibular angle bone cutting navigation template ordered, and in mandibular angle bone cutting Open the window of a 2.5mm × 2.5mm in navigation template second molar position.
2. the preparation method of mandibular angle bone cutting navigation template according to claim 1, which is characterized in that further include (5) Step printing, specifically:Mandibular angle bone cutting navigation template and virtual mandibular threedimensional model are printed by 3D modes.
3. the preparation method of mandibular angle bone cutting navigation template according to claim 1, which is characterized in that
In the step (1), during three-dimensional lower jaw angle model is rebuild, by selecting the threshold value of bone, with lower jaw Bone shows that clearly model is as virtual mandibular threedimensional model.
4. the preparation method of mandibular angle bone cutting navigation template according to claim 3, which is characterized in that the threshold value model of bone Enclose >=226.
5. the preparation method of mandibular angle bone cutting navigation template according to claim 4, which is characterized in that the step (2) In, the design principle of osteotomy line is:Osteotomy line peak is no more than biteplane;Mandible incisor is avoided in the traveling of osteotomy line; In the angle of mandible sclerotin that amputation is loose, lower jaw trailing edge is made to keep smooth curve.
CN201610234979.8A 2016-04-13 2016-04-13 A kind of preparation method of mandibular angle bone cutting navigation template CN105943113B (en)

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