WO2015089908A1 - Method for constructing orthopedic preview model and implant model - Google Patents

Abstract

Disclosed is a method for constructing an orthopedic preview model and implant model. The method allows physicians to fine-tune the craniofacial model through a display device, while allowing patients to preview the effect of craniofacial cosmetic surgery, thereby significantly reducing disputes between doctors and patients, and can prepare the most suitable implant for the patient according to the models, thereby significantly enhancing the satisfaction of surgery. This method uses craniofacial scanning to obtain a craniofacial inner contour and a first craniofacial outer contour, then uses craniofacial scanning to obtain a second craniofacial outer contour, forms an overlap contour by overlapping the first craniofacial outer contour and the second craniofacial outer contour so as to build a craniofacial model and form an adjustment contour area between the craniofacial inner contour and the overlap contour, and then forms a cavity between the adjustment contour area and the craniofacial inner contour by stretching the adjustment contour area, and creates an adjusted craniofacial model according to the adjustment contour area, the craniofacial inner contour and the cavity and finally creates an implant model by capturing the three-dimensional data of the cavity.

Description

Method for establishing a prototype surgery preview model and an implant model Technical field

The present invention relates to a method of establishing a stereotyped surgical model, and more particularly to a method of previewing a surgical effect model and establishing an implant model prior to surgery.

Background technique

In today's cosmetic surgery and reconstruction surgery, the doctors often implant artificial materials under the skin tissue of the patient's cranial skin to modify the skull of the patient. The appearance of the face. Although implants of different sizes are available for physicians, physicians often have to cut the implants before surgery to meet individual patient differences, but often do not fit the patient, especially implants and craniofacial soft The difference in length, width and angle between hard bones. Secondly, before the operation is completed, it is difficult for the doctor or the patient to foresee the post-surgical effect, and there is often a gap between the subjective and technical ability of the physician, and the patient's expectation, which is very likely to cause controversy between medical treatment and disease. Furthermore, the implant cannot be removed and modified for re-implantation, often allowing the patient to passively accept the result of the surgery.

Therefore, how to provide a method for establishing a stereotyped surgery preview model and an implant model is one of the current important topics.

Summary of the invention

The main object of the present invention is to provide a method for establishing a stereotyped surgery preview model and an implant model, which is to use a three-dimensional scanning and three-dimensional imaging technique combined with a computer-aided design, so that the doctor can fine-tune the craniofacial model through the display device, and at the same time Let patients preview the effect of cranioplasty surgery, greatly reducing the controversy between medical treatment.

Another object of the present invention is to provide a method for establishing a prototype surgery preview model and an implant model, which is capable of producing an implant suitable for a patient, and greatly improving the satisfaction of the surgery.

The technical solution adopted by the present invention is: the method for establishing a whole-type surgical preview model and an implant model proposed by the present invention is to scan a cranial face to obtain a contour of a cranial face and a first cranial contour; Scanning the cranial face to obtain a second cranial contour; and overlapping the first cranial contour and the second cranial contour to form an overlapping contour, thereby establishing a craniofacial model; and Forming an adjusted contour region between the overlapping contours; and stretching the contour region to form a cavity between the contours of the skull; and adjusting the contour region, the contour of the skull, and the cavity to establish an adjusted posterior model Finally, the three-dimensional data of the cavity is captured to create an implant model.

The molding step of the implant model is to use a CNC machine tool to cut or utilize a 3D printed implant model.

The beneficial effects of the present invention are: a method for establishing a whole-type surgical preview model and an implant model of the present invention, which enables a physician to fine-tune the craniofacial model through the display device, and at the same time allows the patient to preview the effect of the cranio-surgical surgery. Significantly reduce the controversy between medical treatment and disease, and at the same time make the most suitable implant for patients, greatly improve the satisfaction of surgery, not only for rhinoplasty surgery, but also for chin surgery, congenital craniofacial defect or skull Reconstructive surgery for facial damage.

DRAWINGS

Figure 1 is a flow chart of establishing a model of the present invention;

2 to 9 are schematic views of the present invention.

[Main component symbol description]

10: Craniofacial 101: Nasal bone 102: Nasal cartilage 11: Outline of the skull

12; first cranial contour 13: second cranial contour 1213: overlapping contour

14: Adjusting the contour area 141: Inner surface 15: Cavity

10A: Craniotomy model 10B: Adjusted cranial face model 20: Implant model

detailed description

Hereinafter, a method of establishing an integer surgery preview model and an implant model according to a preferred embodiment of the present invention will be described with reference to the related drawings, wherein the same components will be described with the same reference numerals.

Referring to FIG. 1 , a flow chart of establishing a surgical model of the present invention is shown in FIG. 1 . First, as in step A, a skull face is scanned to obtain a contour of a craniofacial region and a first cranial contour, and the scanning method includes an electronic method. Computed Tomography (CT) or Magnetic Resonance Imaging (MRI) scanning.

Thereafter, as in step B, the cranial face is scanned using a 3D scanner to obtain a second cranial contour.

Thereafter, as in step C, the first cranial contour and the second cranial contour are overlapped to form an overlapping contour, and a craniofacial model is established, and the cranial model can be browsed through a display device, and the display device includes an intelligent type. Devices such as cell phones, tablets, notebooks, or desktop computers.

Thereafter, as in step D, an adjusted contour region is formed between the contour of the craniofacial region and the overlapping contour.

Thereafter, as in step E, the stretched contour region is stretched such that the inner surface is in the same direction as the overlapping contour, and a cavity is formed between the inner surface of the adjusted contour region and the inner contour of the craniofacial region. The method of forming the cavity by stretching and adjusting the contour area is by solid modelling, parameterized modelling, computer aided design (CAD), volume rendering or three-dimensional imaging technology ( 3D rendering techniques) and other technologies.

Thereafter, as in step F, an adjusted posterior cranial model is established based on the contour region, the intracranial contour, and the cavity.

Finally, as in step G, using solid modelling, parametric modeling (Parameteric modelling), Computer Aided Design (CAD), volume rendering or 3D rendering techniques, etc., to capture the three-dimensional data of the cavity and build an implant The model is then implanted using CNC machine tool cutting or 3D printing to complete the implant.

The above is a description of the process of establishing an integrated surgical model of the present invention. The rhinoplasty operation will be taken as an example to explain the establishment of the whole surgery preview model and the implant model.

Referring to FIG. 2, a patient's cranial face 10 is scanned by magnetic resonance imaging to obtain a cranial contour 11 and a first cranial contour 12, and the intracranial contour 11 includes the nasal bone 101 and the nasal cartilage 102. The surface, the first cranial contour 12 is the surface of the cranial face 10.

Referring to FIG. 3, the skull face 10 is then scanned by a three-dimensional scanner to obtain a second cranial contour 13 composed of a Point Cloud with color and light and darkness.

Referring to FIGS. 4 and 5, the first cranial outline 12 and the second cranial outline 13 are then overlapped to form an overlapping contour 1213, and a cranial model 10A having color and light and dark is created to Imaging close to the solid cranial face 10, while allowing a physician and a patient to view the embedded bone and cartilage through a display device, such as a smart phone, tablet computer, notebook computer or desktop computer, the appearance has Color information (RGB) 3D craniofacial model 10A (ie patient pre-operative appearance).

Referring to FIG. 6, an adjusted contour region 14 is formed between the intra-cranial contour 11 and the overlapping contour 1213. The marked contour region 14 is substantially covered by the skin covering the nasal bone 101 and the nasal cartilage 102. Soft tissue, with a certain degree of ductility.

Referring to FIG. 7, the physician then stretches the contour area 14 with a cursor or a finger on the screen to make the bridge of the nose become high and straight, so that the inner surface 141 is interlocked with the overlapping contour 1213, and the tension is adjusted simultaneously. A cavity 15 is formed between the inner surface 141 of the contoured region 14 and the intracranial contour 11 and the cavity 15 is equivalent to During the operation, the soft tissue covering the hard bone and the cartilage is peeled off, so that a gap is formed between the inner surface of the soft tissue and the hard bone and the cartilage, and the volume of the cavity 15 formed by the gap is the volume of the implant.

Referring to FIG. 8, the adjusted contour area 14, the intracranial contour 11 and the cavity 15 are then used to establish an adjusted posterior cranial model 10B, and the adjusted display (ie, the patient's appearance after surgery) is displayed through the display device. The effect is previewed by physicians and patients.

Referring to FIG. 9, finally, the three-dimensional data of the cavity 15 is taken to create an implant model 20, and the implant model 20 is cut by a computer numerical control machine tool or 3D printed to complete the implant. .

In summary, the method for establishing a whole-type surgical preview model and an implant model of the present invention enables a physician to fine-tune the craniofacial model through the display device, and at the same time allows the patient to preview the effect of the cranio-surgical surgery and greatly reduce the effect. The controversy between medical treatment and disease can also make the most suitable implant for patients, greatly improve the satisfaction of surgery, not only for rhinoplasty, but also for chin surgery, congenital craniofacial defect or craniofacial injury. Reconstructive surgery.

The above description is intended to be illustrative, and not restrictive, and all modifications and variations are intended to be included within the scope of the appended claims.

Claims (9)

A method for establishing a prototype surgery preview model and an implant model, the method comprising the steps of: A uses a scan of a cranial face to obtain a contour of the skull and a first cranial contour; B uses the scan of the cranial face to obtain a second cranial contour: C overlapping the first cranial contour and the second cranial contour to form an overlapping contour and establishing a craniofacial model; D forming an adjusted contour region between the inner contour of the craniofacial and the overlapping contour; E stretching the adjusted contour region to form a cavity with the inner contour of the craniofacial; F according to the adjusted contour area, the inner contour of the craniofacial and the cavity to establish an adjusted cranial model: and G takes three-dimensional data of the cavity to create an implant model. The method for establishing a stereoscopic surgery preview model and an implant model according to claim 1, wherein in the step A, the computer model is scanned by an electronic computed tomography or a nuclear magnetic resonance imaging scanning method. To obtain the contour of the craniofacial and the outer contour of the first cranial face. The method for establishing a stereoscopic surgery preview model and an implant model according to claim 1, wherein in the step B, the cranial face is scanned by a three-dimensional scanner to obtain the second cranial contour. The method for establishing an integer surgery preview model and an implant model according to claim 1, wherein in the step C, the craniofacial model can be browsed through a display device. The method for establishing an integer surgery preview model and an implant model according to claim 4, wherein the display device is a smart phone, a tablet computer, a notebook computer or a desktop computer. The method for establishing an integer surgery preview model and an implant model according to claim 1, wherein in the step E, the adjusted contour region is stretched, and the inner surface of the adjusted contour region and the overlapping contour are Co-directional. The method for establishing an integer surgery preview model and an implant model according to claim 1, wherein in the step E, the cavity mode is formed by solid modeling, parametric modeling, computer aided design, and stereoscopic drawing. Or three-dimensional imaging technology. The method for establishing an integer surgery preview model and an implant model according to claim 1, wherein in the step G, the three-dimensional data of the cavity is obtained by using solid modeling, parametric modeling, and computer aiding. Design, stereo rendering or 3D rendering technology. The method of establishing an integer surgery preview model and an implant model according to claim 1, wherein the step of forming the implant model is to use a numerically controlled machine tool to cut or use the 3D to print the implant model.

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