JP2002172123A - Method for reproducing bone tissue, recording medium with this method recorded thereon, and bone tissue reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To judge the cut-off shape of a bone tissue reproduction membrane or cut off the membrane before an operation without cutting a gum so as to expose a dental root by obtaining the shape of a periodontal tissue or an expanded shape obtained by expanding the shape of the bone tissue two-dimensionally based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT photographing. SOLUTION: Based on the three-dimensional X-ray absorption coefficient data obtained by X-ray CT photographing, three-dimensional periodontal tissue shape around the tooth axis S of a tooth 1 or the three-dimensional shape of the bone tissue being the object of treatment are calculated to obtain the expanded shape obtained by expanding this calculated periodontal tissue shape or the shape of the bone tissue two-dimensionally. The expanded shape obtained by this method is displayed as the cut off pattern 41 of the bone tissue reproduction membrane 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional periodontal tissue shape around a tooth axis of a tooth or a treatment target based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. By calculating a three-dimensional shape of a certain bone tissue and obtaining a two-dimensionally developed periodontal tissue shape or a developed shape of the bone tissue shape, the cut shape of the bone tissue regeneration membrane can be determined or determined before surgery. The present invention relates to a bone tissue regeneration method that can be cut, a recording medium that records this method, and a bone tissue regeneration device.

[0002]

2. Description of the Related Art X-rays are radiated from the entire periphery of a tooth or bone tissue as a subject, and projection data is obtained.
From this projection data, the three-dimensional X
Obtaining X-ray absorption coefficient data is known as X-ray CT imaging.

[0003] Based on the three-dimensional X-ray absorption coefficient data, the three-dimensional shape of the periodontal tissue around the tooth axis of the tooth or the three-dimensional shape of the bone tissue to be treated is determined. It is also possible to calculate.

[0004] The term "tooth axis" means an imaginary central axis in the vertical direction of a tooth.

[0005] The three-dimensional periodontal tissue shape or bone tissue shape obtained in this way is used as reference data when a doctor determines a method of treating teeth or bone tissue. .

Hereinafter, the case of dental treatment will be mainly described.

[0007] When a patient has a periodontal disease such as gingivitis, the tooth has been conventionally treated by a bone tissue regeneration method.

[0008] The bone tissue regeneration method (also called the GTR method) refers to a method of forming a thin film of collagen or the like (hereinafter referred to as a "bone tissue regeneration film") on the gingiva and the alveolar bone in which the tooth roots are embedded. By intervening between the upper periodontal tissue, the formation of long conjunctival epithelium that occurs after flap surgery is prevented, and the periodontal cells are induced in the space on the tooth surface formed by the bone tissue regeneration membrane This promotes the formation of cementum and seeks to obtain connective tissue adhesion.

In order for the bone tissue regenerating membrane to be interposed between the gingiva and the periodontal tissue, the root of the tooth becomes an obstacle. Therefore, it is necessary to remove only the root of the tooth from the bone tissue regenerating membrane and cut it. Then, the cut bone tissue regeneration membrane adheres to the periodontal tissue on the upper surface side of the alveolar bone.

[0010] Therefore, conventionally, the gingiva is cut to expose the roots, and a doctor cuts the bone tissue regenerating membrane one by one according to the shape of the roots during the operation, and then cuts the gingival and alveolar bones on the upper periodontal side. The method of intervening between tissues was adopted.

[0011] The bone tissue regeneration method described above can be used in a regeneration method in which bone tissue is induced to promote cementum formation and acquire connective tissue adhesion, even in cases other than dental treatment of teeth.

However, the shape of the periodontal tissue on the upper surface side of the alveolar bone is different from each other, and the doctor cuts the bone tissue regeneration membrane in accordance with the shape of the root. It was a precise manual operation of cutting while watching the shape of the root during the operation.

[0012] Therefore, there is a problem that not only the operation time is long, but also the cutting of the bone tissue regenerating membrane tends to fail.

An object of the present invention is to solve such a problem, and based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, a periodontal tissue shape or a bone tissue shape is determined. Bone tissue that can obtain a developed shape corresponding to a two-dimensionally developed tooth or bone tissue, and can determine or cut the cut shape of the bone tissue regenerating membrane before surgery without cutting the gingiva and covering the tooth root, for example. The present invention relates to a reproducing method, a recording medium on which the method is recorded, and a bone tissue reproducing device.

[0014]

According to a first aspect of the present invention, there is provided a method for regenerating a bone tissue, comprising the steps of: Calculate the surrounding three-dimensional periodontal tissue shape or the three-dimensional shape of the bone tissue to be treated, and develop the calculated periodontal tissue shape or bone tissue shape in two dimensions. The method is characterized in that a shape is obtained, and the developed shape thus obtained is displayed as a cutting pattern of the bone or a bone tissue regeneration membrane corresponding to the bone tissue.

Here, the cutting pattern is a two-dimensional developed shape obtained by calculating a three-dimensional periodontal tissue shape and developing the two-dimensional developed shape excluding only the tooth shaft portion of the tooth. Alternatively, it refers to a two-dimensional developed shape in which a three-dimensional bone tissue is calculated and a two-dimensional developed bone tissue shape is displayed.

According to the first aspect of the present invention, the bone tissue regeneration membrane is developed two-dimensionally from the three-dimensional periodontal tissue shape around the tooth axis of the tooth or the three-dimensional shape of the bone tissue to be treated. Can display patterns.

Therefore, for example, a doctor or the like can know the displayed cutting pattern of the bone tissue regenerating membrane before the operation without cutting the gum and exposing the tooth root. Can be determined before surgery, and the cutting can be performed reliably.

In addition, the bone tissue regeneration membrane can be cut before the operation according to the displayed cutting pattern.
The operation time can be shortened by eliminating the intraoperative cutting time.

[0019] In the bone tissue regeneration method according to claim 2, the X-ray C
Based on the three-dimensional X-ray absorption coefficient data obtained by T imaging, a three-dimensional periodontal tissue shape around the tooth axis of the tooth or a three-dimensional shape of a bone tissue to be treated is calculated.
The calculated periodontal tissue shape or bone tissue shape is 2
Obtaining a developed shape expanded in three dimensions, creating cutting data of the bone tissue regenerating membrane from the developed shape, and using the cut data, cutting the tooth or the bone tissue regenerating membrane corresponding to the bone tissue. It is characterized by.

Here, the cutting data is a two-dimensional developed shape obtained by calculating a three-dimensional periodontal tissue shape and developing the two-dimensional developed shape excluding only the tooth axis portion of the tooth. Alternatively, it refers to a shape obtained by calculating a three-dimensional bone tissue and displaying a two-dimensional expanded bone tissue shape, and further displaying a cut shape such as a cut.

According to a second aspect of the present invention, a two-dimensional developed shape is obtained from the three-dimensional periodontal tissue shape around the tooth axis of the tooth or the three-dimensional shape of the bone tissue to be treated. Cutting data of the bone tissue regeneration membrane can be created from the developed shape.

Therefore, for example, even without cutting the gum and exposing the tooth root, the bone tissue regeneration membrane can be surely cut before the operation using the generated cutting data, and the operation time can be further reduced. .

According to a third aspect of the present invention, there is provided a recording medium on which a program for realizing a bone tissue regeneration method is recorded on a three-dimensional basis around a tooth axis of a tooth based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. Calculating a three-dimensional shape of a periodontal tissue shape or a bone tissue to be treated, and obtaining a developed shape obtained by developing the calculated periodontal tissue shape or the bone tissue shape two-dimensionally. And displaying the developed shape as a cutting pattern of the bone or the bone tissue regeneration membrane corresponding to the tooth or the bone tissue.

According to a third aspect, there is provided a recording medium for realizing the bone tissue regeneration method according to the first aspect.

According to this recording medium, for example, the cutting pattern of the bone tissue regenerating membrane can be displayed on a computer screen or the like according to the recorded program without cutting the gum and exposing the tooth root.

According to a fourth aspect of the present invention, there is provided a recording medium storing a program for realizing a bone tissue regenerating method, comprising a three-dimensional image of a tooth around a tooth axis based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. Calculating a three-dimensional shape of a periodontal tissue shape or a bone tissue to be treated, and obtaining a two-dimensionally developed shape of the calculated periodontal tissue shape or bone tissue shape And a step of creating cut data of the bone or the bone tissue regeneration membrane corresponding to the tooth or the bone tissue from the developed shape.

According to a fourth aspect, there is provided a recording medium for realizing the bone tissue regeneration method according to the second aspect.

According to this recording medium, for example, the bone tissue regenerating membrane can be reliably cut according to the recorded program without cutting the gingiva and exposing the tooth root, and the operation time can be further reduced.

According to a fifth aspect of the present invention, there is provided a bone tissue regeneration device, comprising:
Alternatively, storage means for storing and storing three-dimensional X-ray absorption coefficient data of bone tissue, and arithmetic processing for performing arithmetic processing based on the three-dimensional X-ray absorption coefficient data of tooth or bone tissue stored in this storage means Means, and display means, based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging,
The three-dimensional periodontal tissue shape around the tooth axis of the tooth or the three-dimensional shape of the bone tissue to be treated is calculated, and the calculated periodontal tissue shape or bone tissue shape is two-dimensionally calculated. The developed shape obtained in this manner is obtained, and the obtained developed shape is displayed as a cutting pattern of the bone or the bone tissue regeneration membrane corresponding to the bone tissue.

According to a fifth aspect of the present invention, there is provided a bone tissue regeneration apparatus using the bone tissue regeneration method of the first aspect.

Therefore, for example, a doctor or the like can know the cutting pattern of the bone tissue regenerating membrane displayed on the display means before the operation without cutting the gum and exposing the tooth root.
The cut shape of the bone tissue regeneration membrane can be determined before surgery,
The cutting can be performed reliably.

In addition, since the bone tissue regeneration membrane can be cut before the operation in accordance with the cutting pattern displayed on the display means, the operation time can be reduced.

[0033] The bone tissue regenerating apparatus according to claim 6 is characterized in that:
Alternatively, storage means for storing and storing three-dimensional X-ray absorption coefficient data of bone tissue, and arithmetic processing for performing arithmetic processing based on the three-dimensional X-ray absorption coefficient data of tooth or bone tissue stored in this storage means And a cutting means for cutting the bone tissue regenerating membrane using the given data. Based on the three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, three-dimensional A typical periodontal tissue shape or a three-dimensional shape of the bone tissue to be treated is calculated, and a calculated expanded periodontal tissue shape or a developed shape obtained by expanding the bone tissue shape two-dimensionally is obtained. Cutting data of the bone tissue regeneration membrane is created from the developed shape, and the tooth or the bone tissue regeneration membrane corresponding to the bone tissue is cut using the cut data.

According to a sixth aspect of the present invention, there is provided a bone tissue regeneration apparatus using the bone tissue regeneration method according to the second aspect.

Therefore, for example, the bone tissue regenerating membrane can be reliably cut by the cutting means using the generated cutting data before the operation without cutting the gums and exposing the tooth roots, thereby reducing the operation time. Can be shorter.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bone tissue regeneration method A according to the present invention will be described below with reference to the drawings.

The method A for regenerating bone tissue according to the present invention is a method for inducing bone tissue to promote cementum formation and obtain connective tissue adhesion, and can be used for treatments other than teeth as a regenerating method. However, in this embodiment, a dental treatment of a tooth will be described as an example.

FIGS. 1A to 1C show a first embodiment according to the present invention.
FIG. 2 is a schematic diagram for explaining a bone tissue regeneration method of the present invention.

FIG. 1A is a plan view of a tooth at a portion to be treated, FIG. 1B is a sectional view taken along the line AA shown in FIG.
(C) shows the BB cross-sectional view shown in (b).

In the figure, 1 is a tooth, 11 is a tooth root, 2 is a gum, 3
Denotes an alveolar bone, and 4 denotes a bone tissue regeneration membrane.

As shown by the broken line in FIG. 1B, the tooth 1 has a root 11 buried in the alveolar bone 3 and the alveolar bone 3 is covered with the gingiva 2 shown by the imaginary line in the figure. .

Now, the two teeth 1, 1 shown in FIG.
Let us consider a bone tissue regeneration method in which a bone tissue regeneration membrane 4 shown by a solid line is interposed.

First, as in the conventional case, a three-dimensional periodontal tissue shape around the tooth axis S of the tooth 1 is calculated based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging (not shown). .

Here, the periodontal tissue refers to a bone tissue surrounding the tooth 1, and although not particularly designated in this embodiment, the alveolar bone 3 or, among them, the tooth 1 in particular is referred to as the periodontal tissue. The part buried.

The three-dimensional periodontal tissue shape obtained in this manner can also be viewed in a longitudinal state as shown in FIG. After examining the treatment method for the tissue and the like, and if periodontal disease such as gingivitis has occurred, the bone tissue regeneration method according to the present invention is employed.

Further, as an X-ray CT imaging for viewing a local part in a longitudinal state as shown in FIG. 1B, a local irradiation X-ray CT imaging method and an apparatus thereof previously invented by the present applicant (Japanese Patent Laid-Open Publication No. U.S. Patent No. 2000-139902) is preferable because the amount of X-ray exposure to the patient can be suppressed and the imaging time can be shortened.

Next, the physician determines the position at which the bone tissue regeneration membrane 4 is to be mounted. In this case, the doctor places the alveolar bone 3 between the two teeth 1, 1 shown in FIG. Suppose that it is decided to interpose the bone tissue regeneration membrane 4 shown by the solid line.

In this case, the bone tissue regeneration membrane 4 is replaced with the bone tissue regeneration membrane 4 shown in FIG.
The periodontal tissue on the upper surface side of the alveolar bone 3 is adhered so as to cover the alveolar bone 3 as shown by the hatched portion of FIG.
The periodontal tissue on the upper surface side has a distorted shape, and it is necessary to cut the root 11 from the bone tissue regeneration membrane 4.

Therefore, further calculation is performed from the calculated three-dimensional periodontal tissue shape to obtain a two-dimensional expanded shape of the distorted periodontal tissue shape on the upper surface side of the alveolar bone 3.

From the two-dimensionally developed shape,
As shown in FIG. 1C, by displaying only the root 11 portion of the tooth 1 except for the display, the cutting pattern 41 of the bone tissue regeneration membrane 4 can be displayed.

According to such a bone tissue regeneration method, the doctor or the like can view the periodontal tissue shape and the displayed cutting pattern 41 of the bone tissue regeneration membrane 4 without cutting the gum 2 and covering the root 11.
Can be known before the operation, and the cutting shape of the bone tissue regeneration membrane 4 can be determined before the operation, and the cutting can be reliably performed.

Further, since the bone tissue regeneration membrane 4 can be cut before the operation in accordance with the displayed cutting pattern 41, the operation time can be shortened by eliminating the cutting time during the operation.

FIGS. 2A to 2C show a second embodiment according to the present invention.
FIG. 2 is a schematic diagram for explaining a bone tissue regeneration method of the present invention.

FIG. 2A is a plan view of a tooth to be treated, FIG. 2B is a cross-sectional view taken along the line AA shown in FIG.
(C) shows the BB cross-sectional view shown in (b).

Here, the parts common to FIG.
The same numbers are assigned and the description is omitted.

Now, the two teeth 1, 1 shown in FIG.
Let us consider a bone tissue regeneration method in which a bone tissue regeneration membrane 4 shown by a solid line is interposed.

First, as in the prior art, a three-dimensional periodontal tissue shape around the tooth axis S of the tooth 1 is calculated based on the three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging (not shown). .

The three-dimensional periodontal tissue shape obtained in this manner can be viewed in a longitudinal state as shown in FIG. 2 (b). Organization 31
In the case where periodontal disease such as gingivitis has occurred, the bone tissue regeneration method according to the present invention is employed.

Next, the physician determines the position where the bone tissue regeneration membrane 4 is to be attached. In this case, the doctor attaches the alveolar bone 3 located between the two teeth 1 and 1 shown in FIG. Suppose that it is decided to interpose the bone tissue regeneration membrane 4 shown by the solid line.

In this case, the bone tissue regeneration membrane 4 is replaced with the bone tissue regeneration membrane 4 shown in FIG.
The periodontal tissue on the upper surface side of the alveolar bone 3 is adhered so as to cover the alveolar bone 3 as shown by the hatched portion of FIG.
The periodontal tissue on the upper surface side has a distorted shape, and it is necessary to cut the root 11 from the bone tissue regeneration membrane 4.

When the bone tissue regeneration membrane 4 is actually attached, it is necessary to avoid the root 11.
After cutting the bone tissue regenerating membrane 4 into a plurality of pieces, the bone tissue regenerating membrane 4 may be covered again with the upper surface of the alveolar bone 3, or
It is conceivable that a cut is made by cutting a part of the tooth root 11 cut from an appropriate position of the edge of the tooth, and the cut is opened to adhere to the root 11 while avoiding it.

Therefore, a further development is performed from the three-dimensional periodontal tissue shape calculated as described above to obtain a developed shape in which the periodontal tissue shape on the upper surface side of the distorted alveolar bone 3 is developed two-dimensionally.

From the two-dimensionally developed shape,
As shown in FIG. 2C, the cut data 43 of the bone tissue regeneration film 4 is created by displaying only the root 11 of the tooth 1 except for the cut portion 42 and displaying the cut portion 42 that is actually cut. it can.

Then, if cutting is performed according to the prepared cutting data 43, the bone tissue regeneration membrane 4 corresponding to the tooth 1 is cut.
Can be formed easily and reliably.

According to such a bone tissue regeneration method, even if the gingiva 2 is not cut and the tooth root 11 is not covered, a doctor or the like can obtain the shape of the periodontal tissue and the displayed cut data 43 of the bone tissue regeneration membrane 4. Because it can be created before surgery, using this cutting data 43,
The bone tissue regeneration membrane 4 can be reliably cut before the operation, and the operation time can be further reduced.

FIG. 3 is an explanatory diagram showing the contents of a program on a recording medium on which a program for realizing the bone tissue regeneration method shown in FIG. 1 is recorded.

Hereinafter, portions common to those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted.

The program described in this recording medium is
Step 100 for calculating a three-dimensional periodontal tissue shape around the tooth axis of the tooth based on the three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, and two-dimensionally calculating the calculated periodontal tissue shape Step 110 of obtaining a developed shape developed in
Step 120 of displaying the developed shape as a cutting pattern of the bone tissue regeneration membrane corresponding to the tooth.

That is, three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging is taken in as CT image data, and based on the CT image data, three-dimensional X-ray absorption coefficients around the tooth axis of the tooth are obtained.
By calculating a dimensional periodontal tissue shape, a desired sectional position of the periodontal tissue to be treated is set, and the desired sectional position is displayed (step 100) (see FIG. 1 (b)).

On the basis of the displayed desired cross-sectional position, a calculation for further developing the necessary portion of the periodontal tissue shape calculated in step 100 into a two-dimensional shape is performed (step 1).
10).

Then, the developed two-dimensional shape is displayed as a cutting pattern 41 of the bone tissue regeneration membrane (step 120) (see FIG. 1 (c)).

According to this recording medium, the cutting pattern 41 of the bone tissue regeneration membrane can be displayed on a computer screen or the like in accordance with the recorded program without cutting the gum 2 and covering the root 11. The effect described with reference to FIG. 1 can also be obtained.

FIG. 4 is an explanatory view showing the contents of a program on a recording medium on which a program for realizing the bone tissue regeneration method shown in FIG. 2 is recorded.

The program described in this recording medium is
Step 101 of calculating a three-dimensional periodontal tissue shape around a tooth axis of a tooth based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, and calculating the calculated periodontal tissue shape in two dimensions 111 for obtaining a developed shape developed in
And step 121 of creating cut data of the bone tissue regeneration membrane corresponding to the tooth from the developed shape.

That is, three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging is taken in as CT image data, and based on the CT image data, three-dimensional X-ray absorption coefficient data around the tooth axis of the tooth is obtained.
By calculating a dimensional periodontal tissue shape, a desired sectional position of the periodontal tissue to be treated is set, and the desired sectional position is displayed (step 101) (see FIG. 2 (b)).

Based on the displayed desired cross-sectional position, a necessary portion of the periodontal tissue shape calculated in step 101 is further calculated to obtain a two-dimensionally expanded shape (step 111).

Then, a necessary cut portion 42 such as a cut is displayed in the developed shape, and cut data 43 of the bone tissue regeneration membrane is created (step 121) (see FIG. 2C).

Finally, the bone tissue regenerating membrane 4 is cut in accordance with the developed cut section 42 displayed in the cutting data 43.

According to this recording medium, the bone tissue regeneration film 4 may be cut according to the cut data 43 displayed according to the recorded program, and the bone tissue regeneration film 4 can be cut easily and reliably.

Further, since the cutting can be performed mechanically or automatically by using such a recording medium, the cutting time of the bone tissue regeneration membrane 4 can be further reduced, and the effect described in FIG. 2 can be obtained. it can. FIG. 5 is a schematic diagram showing a bone tissue regeneration device using the bone tissue regeneration method shown in FIG.

The bone tissue regenerating apparatus 50 has a storage means 51 for storing and storing the three-dimensional X-ray absorption coefficient data of a tooth, and a calculation based on the three-dimensional X-ray absorption coefficient data of the tooth stored in the storage means 51. A processing unit 52 for performing processing and a display unit 53 are provided. Based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, a three-dimensional periodontal tissue shape around the tooth axis of the tooth is obtained. The calculated periodontal tissue shape is expanded two-dimensionally to obtain a developed shape, and the obtained expanded shape can be displayed as a cutting pattern 41 of the bone tissue regeneration membrane 4 corresponding to the tooth [FIG. c)).

According to such a bone tissue regeneration device 50,
Even without cutting the gum 2 and covering the root 11,
Since the cutting pattern 41 of the bone tissue regeneration membrane 4 displayed on the display means 53 can be known before surgery, the bone tissue regeneration membrane 4
The cutting shape can be determined before surgery, and the cutting can be reliably performed.

Further, since the bone tissue regeneration membrane 4 can be cut before the operation in accordance with the displayed cutting pattern 41, the operation time can be shortened.

FIG. 6 is a schematic diagram showing a bone tissue regeneration apparatus using the bone tissue regeneration method shown in FIG. The bone tissue regenerating apparatus 60 stores and stores three-dimensional X-ray absorption coefficient data of a tooth, and performs arithmetic processing based on the three-dimensional X-ray absorption coefficient data of the tooth stored in the storage unit 61. It has an arithmetic processing means 62 and a cutting means 63 for cutting the bone tissue regenerating membrane using the given data, and based on the three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, the circumference of the tooth axis. The three-dimensional periodontal tissue shape is calculated, and a developed shape obtained by expanding the calculated periodontal tissue shape two-dimensionally is obtained. From this expanded shape, the cut data 43 of the bone tissue regeneration membrane is obtained.
[See FIG. 2 (c)], and the bone tissue regeneration film 4 corresponding to the tooth can be cut using the cut data 43.

According to such a bone tissue regeneration device 60,
By using the created cutting data 43, the bone tissue regeneration membrane 4 can be cut before the operation, and the operation time can be further reduced.

Further, the bone tissue regeneration membrane 4 can be automatically cut in accordance with the cut data 43.

[0087]

According to the present invention, the following effects can be obtained.

According to the bone tissue regeneration method according to the first aspect,
From the three-dimensional periodontal tissue shape around the tooth axis of the tooth or the three-dimensional shape of the bone tissue to be treated, a cutting pattern of the bone tissue regeneration membrane developed two-dimensionally can be displayed.

Therefore, for example, a doctor or the like can know the displayed cutting pattern of the bone tissue regenerating membrane before the operation without cutting the gum and exposing the tooth root. Can be determined before surgery, and the cutting can be performed reliably.

Further, since the bone tissue regenerating membrane can be cut before operation according to the displayed cutting pattern,
The operation time can be shortened by eliminating the intraoperative cutting time.

According to the bone tissue regeneration method according to claim 2,
From the three-dimensional periodontal tissue shape around the tooth axis of the tooth or the three-dimensional shape of the bone tissue to be treated, a two-dimensional developed shape is obtained. Can create cutting data.

Therefore, for example, even without cutting the gum and exposing the tooth root, the bone tissue regeneration membrane can be surely cut before the operation using the generated cutting data, and the operation time can be further reduced. .

According to the recording medium on which the program for realizing the bone tissue regenerating method according to the third aspect is recorded, for example, even if the gingiva is cut and the tooth root is exposed and the gingiva is not cut, the computer program is executed according to the recorded program. The cutting pattern of the bone tissue regeneration membrane can be displayed on a screen or the like.

According to the recording medium on which the program for realizing the bone tissue regeneration method according to the fourth aspect is recorded, for example, the bone tissue regeneration membrane can be formed according to the recorded program without cutting the gingiva and exposing the roots. It can be cut and the operation time can be further reduced.

[0095] According to the bone tissue regeneration apparatus according to claim 5,
For example, a doctor or the like can know the cutting pattern of the bone tissue regenerating membrane displayed on the display means before surgery without cutting the gums and exposing the roots. It can be determined beforehand, and the cutting can be reliably performed.

Further, since the bone tissue regeneration membrane can be cut before the operation in accordance with the cutting pattern displayed on the display means, the operation time can be reduced.

[0097] According to the bone tissue regeneration device according to claim 6,
For example, even without cutting the gum and exposing the tooth root, the cutting means can reliably cut the bone tissue regeneration membrane before the operation using the generated cutting data, and the operation time can be further reduced.

[Brief description of the drawings]

FIGS. 1A to 1C are schematic views for explaining a first bone tissue regeneration method according to the present invention.

FIGS. 2A to 2C are schematic diagrams for explaining a second bone tissue regeneration method according to the present invention.

FIG. 3 is an explanatory diagram showing program contents of a recording medium on which a program for realizing the bone tissue regeneration method shown in FIG. 1 is recorded.

FIG. 4 is an explanatory diagram showing program contents of a recording medium on which a program for realizing the bone tissue regeneration method shown in FIG. 2 is recorded.

FIG. 5 is a schematic diagram showing a bone tissue regeneration device using the bone tissue regeneration method shown in FIG. 1;

FIG. 6 is a schematic diagram showing a bone tissue regeneration device using the bone tissue regeneration method shown in FIG. 2;

[Explanation of symbols]

 S tooth axis 1 tooth 11 tooth root 2 gingiva 3 alveolar bone (periodontal tissue) 4 bone tissue regeneration membrane 41 cutting pattern 42 cutting part 43 cutting data 100 Step of calculating three-dimensional periodontal tissue shape 110 Two-dimensional development Step of obtaining a developed shape 120 Step of displaying as a cutting pattern 101 Step of calculating a three-dimensional periodontal tissue shape 111 Step of obtaining a 2-dimensional developed shape 121 Step of creating cut data 50 Bone tissue reproducing device 51 Storage Means 52 Arithmetic processing means 53 Display means 60 Bone tissue regeneration device 61 Storage means 62 Arithmetic processing means 63 Cutting means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koji Yasuda 680 Higashihama-minamicho, Fushimi-ku, Kyoto F-term in Morita Manufacturing Co., Ltd. (reference) 4C052 AA06 LL01 4C093 AA22 AA25 AA26 CA18 CA50 FF41

Claims (6)

[Claims] 1. A three-dimensional periodontal tissue shape around a tooth axis of a tooth or a three-dimensional bone tissue to be treated based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. The calculated periodontal tissue shape, or a developed shape obtained by expanding the bone tissue shape in two dimensions is obtained, and the developed shape obtained in this way corresponds to the tooth or the bone tissue. A bone tissue regeneration method, which is displayed as a cutting pattern of a bone tissue regeneration membrane. 2. A three-dimensional periodontal tissue shape around a tooth axis of a tooth or a three-dimensional bone tissue to be treated based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. Of the calculated periodontal tissue shape or expanded shape obtained by expanding the calculated bone tissue shape two-dimensionally, cutting data of the bone tissue regeneration membrane is created from the expanded shape, and the cut data is calculated. A bone tissue regenerating membrane corresponding to the tooth or the bone tissue, using the method. 3. A three-dimensional periodontal tissue shape around a tooth axis of a tooth or a three-dimensional bone tissue to be treated based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. Calculating the calculated periodontal tissue shape or the bone tissue shape to obtain a developed shape in which the developed shape is developed two-dimensionally. The developed shape corresponds to the tooth or the bone tissue. Displaying a cutting pattern of the bone tissue regenerating membrane as a cutting pattern. 4. A three-dimensional periodontal tissue shape around a tooth axis of a tooth or a three-dimensional bone tissue to be treated based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging. Calculating the calculated periodontal tissue shape, or the developed shape obtained by expanding the bone tissue shape two-dimensionally, and calculating the expanded shape corresponding to the tooth or the bone tissue from the developed shape. A recording medium storing a program for realizing a bone tissue regeneration method, comprising a step of creating cut data of a bone tissue regeneration membrane. 5. A storage means for storing and storing three-dimensional X-ray absorption coefficient data of a tooth or a bone tissue, and based on the three-dimensional X-ray absorption coefficient data of a tooth or a bone tissue stored in the storage means. And a display means for performing arithmetic processing on the three-dimensional periodontal tissue shape around the tooth axis of the tooth based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging.
Alternatively, the three-dimensional shape of the bone tissue to be treated is calculated, and the calculated periodontal tissue shape or the expanded shape obtained by expanding the bone tissue shape two-dimensionally is obtained. A bone tissue regeneration device for displaying as a cutting pattern of a bone or a bone tissue regeneration membrane corresponding to the tooth or the bone tissue. 6. A storage means for storing three-dimensional X-ray absorption coefficient data of a tooth or a bone tissue, and based on the three-dimensional X-ray absorption coefficient data of a tooth or a bone tissue stored in the storage means. And a cutting means for cutting the bone tissue regenerating membrane using the given data. Based on three-dimensional X-ray absorption coefficient data obtained by X-ray CT imaging, the tooth Three-dimensional periodontal tissue shape around the tooth axis,
Alternatively, a three-dimensional shape of the bone tissue to be treated is calculated, and a calculated periodontal tissue shape or a developed shape obtained by developing the bone tissue shape two-dimensionally is obtained. A bone tissue regenerating apparatus comprising: preparing cut data of a membrane; and using the cut data to cut a bone or a bone tissue regenerated membrane corresponding to the bone tissue.