CN112137749A - Method for measuring vertical position relation between tooth and jaw - Google Patents
Method for measuring vertical position relation between tooth and jaw Download PDFInfo
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- CN112137749A CN112137749A CN202011009367.1A CN202011009367A CN112137749A CN 112137749 A CN112137749 A CN 112137749A CN 202011009367 A CN202011009367 A CN 202011009367A CN 112137749 A CN112137749 A CN 112137749A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 210000004283 incisor Anatomy 0.000 claims abstract description 23
- 210000001909 alveolar process Anatomy 0.000 claims abstract description 22
- 210000001847 jaw Anatomy 0.000 claims abstract description 20
- 238000007408 cone-beam computed tomography Methods 0.000 claims abstract description 13
- 210000000214 mouth Anatomy 0.000 claims abstract description 7
- 238000010191 image analysis Methods 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 12
- 230000008439 repair process Effects 0.000 description 6
- 230000008859 change Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 206010009269 Cleft palate Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 210000004513 dentition Anatomy 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000008376 long-term health Effects 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 210000002050 maxilla Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003254 palate Anatomy 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 210000001738 temporomandibular joint Anatomy 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C19/00—Dental auxiliary appliances
- A61C19/04—Measuring instruments specially adapted for dentistry
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B6/51—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for dentistry
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Medical Informatics (AREA)
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- Epidemiology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention discloses a method for measuring the vertical position relation between oral teeth and jaws. Under the condition that the upper jaw and the lower jaw are occluded and the upper jaw and the lower jaw are positioned at the interdental malposition, an oral CBCT is used for shooting the oral cavity of a human body to acquire a CT image, a connecting line of the lingual alveolar ridge vertex of the incisors in the upper jaw and the lingual alveolar ridge vertex of the incisors in the lower jaw is made under the section of the CT image, the length of the connecting line is taken as the vertical height, the included angle between the connecting line and the jaw plane is taken as a relation angle, and the vertical height and the relation angle form the vertical position relation between the jaws. According to the invention, the method judges the measurement of the vertical distance between the jaws according to the advantages of relatively stable alveolar ridge at the anterior lingual side, easy measurement and the like, and has good repeatability of measurement data and accurate measurement.
Description
Technical Field
The invention relates to a dental auxiliary measuring method, in particular to a method for measuring the vertical height and the relation angle between the jaws of a tooth.
Background
The same vertical height of occlusion of the patient is ensured before and after the denture is repaired. The Occlusal Vertical Dimension (OVD) is the height of the lower third of the face when the maxilla and mandibular apices are in staggered contact. Accurate measurement is required to accurately restore the physiological bite height, which is beneficial to the long-term health of the temporomandibular joint.
The current clinical methods for testing the vertical distance between the jaws are various, such as: the method comprises the steps of stopping the vertical distance of the occlusion position, stopping the occlusion gap, stopping the vertical distance from the pupil to the fissure, observing the facial appearance and the like, but the method is strongly influenced by subjectivity, has the defects that a reference point and a reference object are easy to move and change, the individual difference is large and the like, and has poor repeatability of measured data and inaccurate measurement due to the lack of an objective reference point.
Disclosure of Invention
To solve the problems and disadvantages of the background art, it is an object of the present invention to provide a stable measuring method for measuring vertical height variation of oral occlusion, which can obtain a relatively more accurate and stable reference and result.
The technical scheme adopted by the invention for solving the technical problems is as follows:
under the occlusion condition of the upper jaw and the lower jaw, when the upper jaw and the lower jaw are positioned at the intertooth dislocation, namely the intertooth dislocation of the teeth and the teeth points at the middle cusp is taken as a mark, a human oral cavity is shot by means of oral CBCT to acquire a CT image, a connecting line of the crest of the alveolar ridge at the lingual side of the incisors in the upper jaw and the crest of the alveolar ridge at the lingual side of the incisors in the lower jaw is taken under the section of the CT image, the length of the connecting line is taken as the vertical height, namely a C line, the included angle between the connecting line and the jaw plane is taken as a relation angle, and the vertical height and the relation angle form.
And the lingual alveolar ridge vertex is determined according to the axial plane, the sagittal plane and the coronal plane of the CT image.
The axial surface is marked by the proximal and distal 1/2 of the maxillary central incisor.
The sagittal plane is marked by maxillary central incisor labial palatal plane 1/2.
The coronal plane is marked by the incisional gingival direction 1/2 of the maxillary middle incisor.
In the upper jaw or the lower jaw, if anterior teeth are missing, the lingual alveolar ridge vertex of the anterior tooth zone is taken as a mark point.
The lingual alveolar ridge vertex of the incisors in the upper jaw and the lingual alveolar ridge vertex of the incisors in the lower jaw can be obtained by image analysis processing.
The invention uses CBCT to collect image, at the same position, using upper jaw incisor as reference tooth, at the axial plane fixed point, controlling near-far middle direction, at the sagittal plane fixed point, controlling lip and palate direction, at the coronal plane fixed point, controlling incisal gum direction, making the measuring interface reach uniform standard in three-dimension, under the interface connecting the upper jaw incisor and the lower jaw incisor tongue side alveolar ridge top point, and the intersection angle of the connecting line and jaw plane, the front and back change of the two can judge the change of vertical height.
The main working principle of the invention is that three-dimensional imaging is carried out on a stable position through the stable (dental jaw) position-cusp staggered position, a fixed point is fixed on a three-dimensional space, an interface is uniformly measured, and the vertical height is judged and measured according to the relative position relation of upper and lower middle incisor lingual alveolar ridges by virtue of the characteristic that the upper and lower middle incisor lingual alveolar ridges are not easy to absorb.
Compared with the prior art, the invention has the following beneficial effects:
1. by means of a digitizer, multi-layer and multi-dimensional fixed points are obtained, and more accurate and more multivariate information is obtained;
2. three-dimensional modeling is carried out through an instrument, and static and accurate information can be adopted;
3. the cross section and the fixed point standard are unified, and positioning ambiguity caused by subjective factors is reduced;
4. the reference is stable and the measurement of vertical height is repeatable.
According to the advantages of relative stability and easy measurement of the alveolar ridge on the anterior lingual side, the method is provided for judging the measurement of the vertical distance between the (dental jaws), and the measurement data has good repeatability and accurate measurement.
Drawings
FIG. 1: a cusp staggered bitmap where the CBCT dentition is located;
FIG. 2: performing fixed-point screenshot on the CBCT axial surface;
FIG. 3: positioning and screenshot in a CBCT sagittal plane;
FIG. 4: positioning and screenshot of a CBCT coronal plane;
FIG. 5: vertical height and angle of relationship.
In the figure: line 1, angle 2.
Detailed Description
The invention is further described with reference to the accompanying drawings and the detailed description.
The embodiments of the present invention are specifically as follows:
under the premise that the human teeth remove the occlusion rod, the cusp staggering is kept stable, and as shown in fig. 1, the stereo image information of the CBCT is shot statically and vertically.
After obtaining CBCT three-dimensional imaging, fixed-point mapping was performed in 3 dimensions, respectively. As shown in fig. 2, on the axial surface, the section latitude of the axial surface is established by taking the maxillary central incisor mesial-distal 1/2 as a mark; as shown in fig. 3, in the sagittal plane, using the cleft palate surface 1/2 as a mark, the section latitude of the sagittal plane is established; as shown in fig. 4, the coronal section latitude is determined in the coronal plane using the maxillary central incisional gingival direction 1/2 as a marker.
Finally, under the sagittal plane of fig. 5 under the unified standard, a connecting line 1 for connecting the apical points of the alveolar ridges at the lingual sides of the incisors in the upper jaw and the lower jaw (if anterior teeth are missing, the apical points of the alveolar ridges at the lingual sides of the alveolar ridges in the anterior tooth zone are marked points) is used for obtaining the vertical height, and the included angle between the connecting line 1 and the jaw plane at the moment is a relation angle 2.
For the mouth prosthetics, CBCTs are taken one by one on the crossing position of the cusps before and after prosthetics. And (3) as required, fixing points on a three-dimensional plane, as shown in fig. 5, measuring a connecting line 1 which is 18.81mm before repairing and a relation angle 2 which is 54 degrees after repairing, and comparing two groups of data, wherein the connecting line 1 and the relation angle 2 are measured in the same way: if the two groups of data are almost equal, the vertical height after the oral cavity is repaired is reasonable; if the data value after the repair is larger than the data value before the repair, the vertical height after the repair is too large; and if the data value after the repair is smaller than the data value before the repair, the vertical height after the repair is too small.
Therefore, with the continuous development of science and technology, the oral cavity can realize high-standard operation in the trend of digital rapid development, and the invention shoots CBCT measurement to obtain a result with the help of a digitizer CBCT instrument, thereby realizing high precision and accurate judgment.
The above-described embodiments are intended to illustrate rather than limit the invention, and all modifications and variations that fall within the spirit of the invention and the scope of the claims are intended to be embraced therein.
Claims (7)
1. A method for measuring the vertical position relation between the jaws is characterized in that: under the condition that the upper jaw and the lower jaw are occluded and the upper jaw and the lower jaw are positioned at the interdental dislocation, an oral cavity CBCT is used for shooting a human oral cavity to acquire a CT image, a connecting line (1) of the lingual alveolar ridge crest of the incisors in the upper jaw and the lingual alveolar ridge crest of the incisors in the lower jaw is made under the cross section of the CT image, the length of the connecting line is taken as the vertical height, the included angle between the connecting line (1) and the jaw plane is taken as a relation angle (2), and the vertical height and the relation angle (2) form the vertical position relation between the upper jaw and the lower jaw.
2. The method for measuring the vertical positional relationship between the dental jaws as set forth in claim 1, wherein: and the lingual alveolar ridge vertex is determined according to the axial plane, the sagittal plane and the coronal plane of the CT image.
3. The method for measuring the vertical positional relationship between the dental jaws as set forth in claim 1, wherein: the axial surface is marked by the proximal and distal 1/2 of the maxillary central incisor.
4. The method for measuring the vertical positional relationship between the dental jaws as set forth in claim 1, wherein: the sagittal plane is marked by maxillary central incisor labial palatal plane 1/2.
5. The method for measuring the vertical positional relationship between the dental jaws as set forth in claim 1, wherein: the coronal plane is marked by the incisional gingival direction 1/2 of the maxillary middle incisor.
6. The method for measuring the vertical positional relationship between the dental jaws as set forth in claim 1, wherein: in the upper jaw or the lower jaw, if anterior teeth are missing, the lingual alveolar ridge vertex of the anterior tooth zone is taken as a mark point.
7. The method for measuring the vertical positional relationship between the dental jaws as set forth in claim 1, wherein: and the lingual alveolar ridge vertex of the incisors in the upper jaw and the lingual alveolar ridge vertex of the incisors in the lower jaw are obtained by image analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202011009367.1A CN112137749B (en) | 2020-09-23 | 2020-09-23 | Method for measuring vertical position relation between tooth and jaw |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011009367.1A CN112137749B (en) | 2020-09-23 | 2020-09-23 | Method for measuring vertical position relation between tooth and jaw |
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| CN112137749A true CN112137749A (en) | 2020-12-29 |
| CN112137749B CN112137749B (en) | 2022-04-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2324456C1 (en) * | 2006-08-24 | 2008-05-20 | Мукатдес Ибрагимович Садыков | Method of control of fitting of artificial teeth in complete removable prosthesis relative to landmarks on patient's face and skull |
| JP2013063241A (en) * | 2012-02-07 | 2013-04-11 | Hiroki Hirabayashi | Method of calculating index for determination of jaw deformity, method for determination of jaw deformity, program and computer |
| US20150320379A1 (en) * | 2012-12-17 | 2015-11-12 | Cephmedical Corporation | Method of deciding risk of obstructive sleep apnea syndrome, method of deciding sinking of hyoid bone, programs, x-ray diagnostic system, and method of making oral appliance |
| CN105411716A (en) * | 2014-09-22 | 2016-03-23 | 北京大学口腔医学院 | Method for directly measuring intercuspal positions of alveolar ridges of edentulous jaws |
| US9808326B2 (en) * | 2014-03-18 | 2017-11-07 | President And Fellows Of Harvard College | 3D dentofacial system and method |
-
2020
- 2020-09-23 CN CN202011009367.1A patent/CN112137749B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2324456C1 (en) * | 2006-08-24 | 2008-05-20 | Мукатдес Ибрагимович Садыков | Method of control of fitting of artificial teeth in complete removable prosthesis relative to landmarks on patient's face and skull |
| JP2013063241A (en) * | 2012-02-07 | 2013-04-11 | Hiroki Hirabayashi | Method of calculating index for determination of jaw deformity, method for determination of jaw deformity, program and computer |
| US20150320379A1 (en) * | 2012-12-17 | 2015-11-12 | Cephmedical Corporation | Method of deciding risk of obstructive sleep apnea syndrome, method of deciding sinking of hyoid bone, programs, x-ray diagnostic system, and method of making oral appliance |
| US9808326B2 (en) * | 2014-03-18 | 2017-11-07 | President And Fellows Of Harvard College | 3D dentofacial system and method |
| CN105411716A (en) * | 2014-09-22 | 2016-03-23 | 北京大学口腔医学院 | Method for directly measuring intercuspal positions of alveolar ridges of edentulous jaws |
Non-Patent Citations (3)
| Title |
|---|
| 程锦: "辽宁地区成人深覆合患者颌面部硬组织形态特征的CBCT研究", 《中国优秀博硕士学位论文全文数据库(硕士)医药卫生科技辑》 * |
| 魏雅楠等: "三维转化投影测量法评估咬合垂直距离的研究", 《华西口腔医学杂志》 * |
| 魏雅楠等: "三维转化投影测量法评估咬合垂直距离的研究", <华西口腔医学杂志> * |
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| CN112137749B (en) | 2022-04-08 |
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