The digitized preparation method of edentulous jaw personalization impression trayTechnical field
The present invention relates to the making of a kind of edentulous impression tray, be specifically related to a kind of edentulous jaw personalization impression trayDigitized preparation method.
Background technology
1, the manual complete denture individual tray manufacturing technology of clinical practice the most both at home and abroad
Make complete denture and have 4 committed steps: die, model, neck position relation (containing occlusal balance), outside row's tooth and baseShape.Wherein, die and model are bases, have had die and model accurately, and complete denture could obtain good maintenance.ButBeing feasible by utility tray once-through method impression taking to removable partial denture, for complete denture, utility tray is with concreteThe anodontia neckline cavity tissue of patient is the most similar, and the position distance having therebetween is uneven, edge and mucosa fold backGap between line, cannot obtain accurate model in order to delivery.And the individual tray that secondary method, repeatedly method make can make each portionThe pressure of position is highly uniform, the thickness uniformity of impression material, reduces the error that polymerization shrinkage causes.Especially edgeCan be the most completely the same with mucosa fold line, therefore can obtain die accurately.And it is bad to residual alveolar ridge conditionEdentulous Cases, does not often reach requirement with ready-made tray once-through method delivery, and secondary impression method produces anodontia by individual trayJaw die is the most very useful, is that Edentulous Cases carries out clinical key operation the most basic in complete denture restoration treatment, conventionalTechnology is by using individual tray to produce die, and the morphological characteristic of acquisition patient mouth inner tissue, is domestic and international stomatology accuratelyThe ideal seek assiduously in boundary and target.
At present, individual tray can be added red cream by ready-made tray and be formed, but process of clinical application is loaded down with trivial details, manual operations skillRequiring the highest, operating unskilled is that impression making failure easily occurs.Junior doctors and medico are difficult to slap at short noticeHolding, cause clinical edentulous impression producing process to consume substantial amounts of time and efforts, often a patient needs half a day evenThe daylong time.In recent years, more progressively faced by the method for self-solidifying photocurable resin material making individual tray on preliminary castBed accepts, but operating process is the most complex, and the operating time does not reduce.And this kind of method is to use self-solidifying on preliminary castOr photocurable resin material makes individual tray, correct stretching, extension, handle position and the shape in edge can not disturb surrounding soft tissueThe supporting device that movable, alveolar ridge of mandible top is placed should be not wider than residual alveolar ridge width to avoid the dry of histokinesis at the bottom of boil on the nape opposite the mouthDisturb that precision when causing clinic to produce die is inefficient, relevant criterion is difficult to realize.But the process of making individual tray is completeBy having been manually done, need the regular hour, need patient's further consultation again and the experience level for technician to have bigger dependency,And manual operations is difficulty with reserving the three dimensions of thickness uniformity for final impression, it is impossible to meet efficient, convenient, accuratelyProduce the purpose of individual tray.Therefore, need research and development badly brand-new, prepared by automatization, the digitized of intelligent clinical individual trayTechnology, substitutes traditional manual mode！
2, the digital prototype technology of complete denture individual tray
The digital prototype technology of oral repairing clinic or Computer-aided Design Technology (CAD), advised by dummy three-dimensionalDraw, design software program and carry its computer hardware and constitute, current conventional CAD software program allows operator respectivelyIndividual stage, all angles realize Interactive Design, meet the individual demand of dummy.In recent years, with structure light (grating), lineLaser gradually becomes main flow with the non-contact 3-D scanner that 3 D stereo camera work is representative, high efficiency, high-resolution and moreThe operation interface adding hommization is their outstanding feature, it is possible to provide preferable application platform for the scanning of mouth external model.Outside KouScanning technique is in the plaster model three-dimensional data acquisition of making complete crown of clinical oral, facial 3 d image data acquisition etc.Aspect is extensively applied and is used successfully to clinical diagnosis and treatment process, and the Design of digital of the individual tray of complete denture is at clinical oralMedical domain still falls within a new field.
3, the digitized manufacturing system technology of complete denture individual tray
At present, some Digitized Manufacturing Technologies the most occurred and be applied to clinical oral diagnosis and treatment, its basic principle isVirtual dummy can be manufactured into material object exactly, it is desirable to have good fitness and reduce the work of technician's secondary operations as far as possibleAmount.Conventional technology has three classes: numerical control mill, grinding machine tool are processed into pre-material block automatically, directly make reparation on Gypsum Fibrosum dieBody, quick shaping (RP) technology.Three-dimensional printing technology in rapid shaping technique and the application in field, oral cavity thereof at present also fliesSpeed development, 3 D-printing is a kind of direct digitization manufacture (Direct Digital Manufacturing), by 3D solidCad model can directly produce product, reduces or eliminates blank and prepares the intermediate step such as part process and assemble and can beLimits ground plays properties of materials, reduces the waste of material.Therefore, three-dimensional printing technology is used to realize the indivedual of complete dentureThe digitized manufacturing system of pallet, and have quick, accurate, efficient, convenient, feature timely, and having no both at home and abroad at present and relevant reportRoad.
Summary of the invention
It is an object of the invention to provide the digitized preparation method of a kind of edentulous jaw personalization impression tray, set with digitizedMeter and make edentulous jaw personalization impression tray substitute traditional-handwork make, it is achieved clinical oral automatically produce complete denture withoutThe target of tooth jaw personalization impression tray, can be effectively improved the clinical treatment operating technology level of basic unit doctor at short notice,Improve diagnosis and treatment efficiency and quality.
In order to achieve the above object, the present invention has a following technical scheme:
The digitized preparation method of a kind of edentulous jaw personalization impression tray of the present invention, comprises the following steps:
1, the digitized preparation method of a kind of edentulous jaw personalization impression tray, comprises the following steps:
1) produce preliminary impression with die cream or alginate, plaster model can be irrigated；
2) with dentognathic model spatial digitizer directly scan preliminary impression or scanning plaster model, obtain edentulous jaw preliminary impression orThe three-dimensional data of plaster model tissue surface form；
3) scan data being called in reverse engineering software, extracting edentulous jaw preliminary impression tissue surface mucosa fold line is edgeLine, with edge line as border, intercepts the tissue surface cloud data of edentulous jaw preliminary impression；
4) in reverse engineering software platform, corresponding step 3) the virtual pallet of edentulous jaw preliminary impression, choose one | toothClose | gum to enter a direction, fill and lead up in the direction alveolar ridge cheek all edge lines within, the undercut district of tongue side, it is thus achieved that withoutRecessed alveolar ridge surface cloud data；
5) 1-2mm will uniformly be amplified along alveolar ridge surface along alveolar ridge surface normal, for final edentulous jaw personalization printThe three dimensions of uniformity reserved by die shoe dish, it is thus achieved that virtual pallet inner surface；
6) along virtual pallet inner surface normal direction by its uniform thickened 2mm, then design one and virtual pallet enter a directionVertically and the plane tangent with inner surface, using it as virtual pallet outer surface；
7) virtual for upper jaw tray handle being designed as bar portion is rectangle, and end is the handle of arc；By virtual for lower jaw palletHandle design be bar portion be rectangle, end is the handle of triangle；
8) data boundary of virtual pallet inner surface, outer surface and handle is merged, it is thus achieved that edentulous jaw personalization preliminary impressionThe intact form data of virtual pallet, preserve with STL form；
9) by step 8) described in STL data import the computer system that is connected with 3D printing device, by 3D printing device,Make the edentulous jaw personalization impression tray of PMMA material.Wherein, described step 5) will be along alveolar ridge along alveolar ridge surface normal1-2mm is uniformly amplified on surface.
It is an advantage of the current invention that:
Substitute traditional-handwork with the edentulous jaw personalization impression tray of Design of digital and making to make, for final impression materialThe three dimensions of reserved uniformity, it is achieved clinical oral produces the mesh of complete denture edentulous jaw personalization impression tray automaticallyMark, the present invention can be effectively improved the clinical treatment operating technology level of basic unit doctor at short notice, improves diagnosis and treatment efficiency and matterAmount.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of edentulous jaw Gypsum Fibrosum preliminary impression of the present invention；
Fig. 2 is the schematic diagram of edentulous jaw personalization impression tray of the present invention；
Fig. 3 is the enlarged diagram in edentulous jaw Gypsum Fibrosum preliminary impression undercut district of the present invention.
In figure, 1, lower edentulous jaw Gypsum Fibrosum preliminary impression tissue surface mucosa fold line；2, upper edentulous jaw Gypsum Fibrosum preliminary impression tissue surfaceMucosa fold line；3, | tooth close | gum to；4, alveolar ridge；5, undercut district；6, pallet inner surface；7, pallet outer surface；8, handle；9、Mucosa fold line and the intersection point in path of insertion direction.When path of insertion direction refers to wear artificial tooth, the route in place of artificial tooth.
Detailed description of the invention
Following example are used for illustrating the present invention, but are not limited to the scope of the present invention.
Seeing Fig. 1, the digitized preparation method of a kind of edentulous jaw personalization impression tray of the present invention, including following stepRapid:
1, the digitized preparation method of a kind of edentulous jaw personalization impression tray, comprises the following steps:
1) produce preliminary impression with die cream or alginate, plaster model can be irrigated；
2) with dentognathic model spatial digitizer directly scan preliminary impression or scanning plaster model, obtain edentulous jaw preliminary impression orThe three-dimensional data of plaster model tissue surface form；
3) scan data being called in reverse engineering software, extracting edentulous jaw preliminary impression tissue surface mucosa fold line is edgeLine, with edge line as border, intercepts the tissue surface cloud data of edentulous jaw preliminary impression；
4) in reverse engineering software platform, corresponding step 3) the virtual pallet of edentulous jaw preliminary impression, choose one | toothClose | gum to enter a direction, fill and lead up in the direction alveolar ridge cheek all edge lines within, the undercut district of tongue side, it is thus achieved that withoutRecessed alveolar ridge surface cloud data；
5) 1-2mm will uniformly be amplified along alveolar ridge surface along alveolar ridge surface normal, for final edentulous jaw personalization printThe three dimensions of uniformity reserved by die shoe dish, it is thus achieved that virtual pallet inner surface；
6) along virtual pallet inner surface normal direction by its uniform thickened 2mm, then design one and virtual pallet enter a directionVertically and the plane tangent with inner surface, using it as virtual pallet outer surface；
7) virtual for upper jaw tray handle being designed as bar portion is rectangle, and end is the handle of arc；By virtual for lower jaw palletHandle design be bar portion be rectangle, end is the handle of triangle；
8) data boundary of virtual pallet inner surface, outer surface and handle is merged, it is thus achieved that edentulous jaw personalization preliminary impressionThe intact form data of virtual pallet, preserve with STL form；
9) by step 8) described in STL data import the computer system that is connected with 3D printing device, by 3D printing device,Make the edentulous jaw personalization impression tray of PMMA material.
Wherein, described step 5) will uniformly amplify 1-2mm along alveolar ridge surface along alveolar ridge surface normal.
Described occlusion cast scanner can use Smart Optics 880 Dental Scanner company of Germany: modelFor Smart Optics scanner.
Three-dimensional reverse engineering software can use Raindrop Geomagic company of the U.S., Geomagic Studio2012 version softwares.
As it has been described above, just can the most sufficiently realize the present invention.The foregoing is only the relatively reasonable enforcement of the present inventionExample, protection scope of the present invention includes but are not limited to: this, and those skilled in the art is any based on the technology of the present invention sideIn case, unsubstantiality degeneration change is included within the scope of the present invention includes.