JP6341842B2 - Method and program for determining occlusal two planes - Google Patents

Description

The present invention is a prosthetic device that uses CAD / CAM in the dental field, and is used in combination with a set-up, a correction device that uses a CAD / CAM bracket, and a mockup for diagnosis. At this time, the present invention relates to a method for determining an occlusal plane based on a cephalometric radiogram and a program therefor.

As a conventional occlusal plane, one plane set based on anatomical criteria such as the Frankfurt plane (Frankfort horizontal plane) and the Kampel plane was adopted as a temporary occlusal plane.

The literature which shows the production method of the prosthetic device based on the conventional occlusal plane is shown.
Patent Document 1 provides a method capable of relatively easily obtaining an ideal occlusion in dental treatment and an articulator suitable for the method, and provides a denture along a reference line obtained from a patient's head X-ray standard photograph. Is fixed. However, the setting of the reference point depends largely on the experience of the surgeon, and it is unlikely that the occlusal construction will be greatly facilitated as compared to the conventional method.

Patent Document 2 discloses a method for producing a denture through a communication medium as a system and method for providing a custom denture. However, since a specific index for producing a higher-quality prosthetic device is not shown, the system is not sufficient to efficiently produce and provide a high-quality prosthetic device.

Non-Patent Document 1 introduces a method in which a virtual occlusal plane in the process of preparing a complete denture is used as an anatomical reference, the Kampel plane or the Frankfurt plane as a reference plane. However, no matter which reference plane is used, skill is required to improve the stability and aesthetics of the denture.

Non-Patent Document 2 introduces a method for setting a virtual occlusal plane. There are a method for determining from the upper jaw and a method for determining from the lower jaw. When the lower jaw is opposed, the occlusal plane should not deviate significantly from the reference plane of either the upper or lower jaw. Therefore, in practice, the procedure has to be re-corrected so that the overall harmony can be obtained, and the operation is complicated and requires skill.

Non-Patent Document 3 describes that the Kampel plane is used as the reference plane of the occlusal plane, but it is necessary to adjust the occlusal plane, and it is difficult for an inexperienced operator to grasp a clear reference. In addition, there is a problem that adjustment of the occlusal floor performed to obtain an appropriate occlusal plane is complicated and requires skill.

Non-Patent Document 4 discloses a method for setting an occlusal plane using an anatomical reference point and a method for forming an occlusal surface in reconstructing an occlusion. However, since this method is also a method of occlusal reconstruction based only on the anatomical reference point, adjustments by intraoral trial adjustment and complicated adjustments on the articulator are required in the final prosthetic device production process It was.

JP2003-24348 JP2011-517801A

Edited by Shizuo Hayashi, "Full Denture Prosthetics" 1st edition, published by Medical Dentistry Publishing Co., Ltd., April 10, 1982 Edited by Naoyuki Matsumoto, “Complete Denture Technique”, published by Ishiyaku Publishing Co., Ltd., July 30, 1988 Satoshi Hayakawa, “Theory and Clinical Study of Complete Denture”, Quintessence Publishing Co., Ltd., August 1995 Published by Masahiro Kuwata, “Ceramo Metal Technology 2”, published by Ishiyaku Shuppan Co., Ltd., August 23, 1982

Thus, the prosthetic device manufactured based on the occlusal plane determined through complicated methods and processes may cause aesthetic problems. In order to meet the needs of patients, it is necessary to repeat trial adjustments and adjustments to the patient in the prosthetic device manufacturing process, which can easily induce errors in the process, and the burden on the surgeon's dentist or dental technician. Not only that, the number of patient visits increased, and the burden on the patient was increased, resulting in an increased financial burden. There has been a need for a method that does not require repeated trial adjustments and adjustments to the patient in the prosthetic device manufacturing process.

In addition, when the occlusal plane determined in a complicated process is not in harmony with the living body, functions such as maintenance and stability of the denture and occlusal force and mastication function cannot be obtained sufficiently, and complicated occlusal adjustment and A functional evaluation was required, which was not only a burden for the dentist and dental technician on the operator side, but also a burden on the patient side, such as an increased number of patient visits and an increased economic burden.

Especially in complete dentures, the occlusal plane prepared to match the academic occlusal plane in the final height of the occlusal height is harmonized with the upper lip at the front teeth, and the molar part is placed in the posterior triangle 1 If it is unified to / 2, it becomes a large angle with respect to the mandibular ridge, and as a result, the part becomes a ski zone, and the acting force that the mandibular denture slides forward during mastication is applied. As a result, the maintenance stability of the denture was impaired.

As the masticatory function in the oral cavity function, there are a “shear function” and a “massage function”, and the shear function is mainly performed in the teeth in the front part of the dentition, and the mortar function is performed in the teeth in the rear part of the dentition.
When the angle between the occlusal plane in the rear part and the lower alveolar ridge becomes steep during this masticatory function, the lower denture slips forward and loses the stability of the denture. This occurs especially when the resorption of the ridge is large. For example, in a complete denture patient with a skeleton with a High Angle tendency, the alveolar bone (the part of the bone in which teeth are embedded) exists on the intrinsic bone called the mandible. ) Also shows a strong tendency to become steep ridges. When such a patient is provided with a Kampel plane, which is a virtual occlusal plane that is given when preparing a complete denture, the lower alveolar ridge has a steep angle with respect to the occlusal plane. As a result, the mandibular denture slides during chewing and loses its maintenance stability, and can not be able to demonstrate a satisfactory chewing function, and not only finely grind food but also mix with saliva that aids digestion It becomes impossible to perform the oral function as a digestive organ, and places a heavy burden on the gastrointestinal tract.

In order to solve the above problems, the present invention takes a patient's cephalometric radiogram, analyzes it, and based on the patient's anatomical reference (marking point) in the temporal view, Determine the occlusal plane. An occlusal plane for the maxillary movement can be given to the rear part, and the anterior part can correspond to the mandibular movement.

Specifically, the present invention is an occlusal plane determination method,
The cervical axis odontoid mark (c) at the center of the second cervical dentate process (DAV) and the final maxillary second premolar cusp position at the final maxillary second premolar cusp (i ) Cervical axis odonto process mark (c) and final maxillary second premolar cusp position (i) There is an occlusal plane determining step for determining the occlusal plane to include line (2) as part of the occlusal plane.

Furthermore, the present invention is a method for determining an occlusal plane,
Cervical dentate process mark (c) at the center of the second cervical vertebra axis (DAV) and final maxillary second premolar cusp position at the final maxillary second premolar cusp (i) In the image of the cephalometric radiograph having the final maxillary anterior tooth mark (n) on the maxillary anterior tooth and the posterior triangle 1/2 mark (z) on the posterior triangle 1/2,
Determine the final maxillary anterior molar 1/2 line (1) connecting the final maxillary anterior tooth mark (n) and the retroposterior triangular 1/2 mark (z). Decision stage,
The final maxilla, which is the position of the cusp of the final maxillary second premolar at a position within 37.0 mm posteriorly from the final maxillary anterior tooth mark (n) on the final maxillary anterior molar 1/2 line (1) Final maxillary second premolar cusp decision stage to determine the second premolar cusp position (i),
Cervical dentate center determining the final maxillary second premolar cusp line (2) connecting the cervical vertebra dentate mark (c) and the final maxillary second premolar cusp position (i) Final maxillary second premolar cusp line determination stage,
Cervical axis dentition center final maxillary second premolar cusp line (2) and final maxillary line, which is the line connecting the cervical axis odontoid mark (c) and final maxillary second premolar cusp position (i) Occlusion determining the occlusal plane to include the final maxillary second premolar cusp final maxillary anterior line (1), which is the segment connecting the bicuspid cusp position (i) and the final maxillary anterior tooth mark (n) A plane determination step is included.

The present invention is an occlusal plane determination program,
The cervical axis odontoid mark (c) at the center of the second cervical dentate process (DAV) and the final maxillary second premolar cusp position at the final maxillary second premolar cusp (i ) Cervical axis odonto process mark (c) and final maxillary second premolar cusp position (i) There is an occlusal plane determining step for determining the occlusal plane to include line (2) as part of the occlusal plane.

The present invention is an occlusal plane determination program,
Cervical dentate process mark (c) at the center of the second cervical vertebra axis (DAV) and final maxillary second premolar cusp position at the final maxillary second premolar cusp (i) In the image of the cephalometric radiograph having the final maxillary anterior tooth mark (n) on the maxillary anterior tooth and the posterior triangle 1/2 mark (z) on the posterior triangle 1/2,
Determine the final maxillary anterior molar 1/2 line (1) connecting the final maxillary anterior tooth mark (n) and the retroposterior triangular 1/2 mark (z). Decision stage,
The final maxilla, which is the position of the cusp of the final maxillary second premolar at a position within 37.0 mm posteriorly from the final maxillary anterior tooth mark (n) on the final maxillary anterior molar 1/2 line (1) Final maxillary second premolar cusp decision stage to determine the second premolar cusp position (i),
Cervical dentate center determining the final maxillary second premolar cusp line (2) connecting the cervical vertebra dentate mark (c) and the final maxillary second premolar cusp position (i) Final maxillary second premolar cusp line determination stage,
Cervical axis dentition center final maxillary second premolar cusp line (2) and final maxillary line, which is the line connecting the cervical axis odontoid mark (c) and final maxillary second premolar cusp position (i) Occlusion determining the occlusal plane to include the final maxillary second premolar cusp final maxillary anterior line (1), which is the segment connecting the bicuspid cusp position (i) and the final maxillary anterior tooth mark (n) A plane determination step is included.

The cervical vertebral process mark (c) at the center of the second cervical vertebra axis dental process (DAV) is the central point of the second cervical vertebral process.
The final maxillary anterior tooth mark point (n) of the maxillary anterior teeth is the position determined by using the ANS as a longitudinal reference, with the position where the upper lip and the lower lip meet with the appropriate occlusal height as the vertical reference. .
The structure of the lower half of the posterior triangle is different from the lower half and the upper half of the posterior triangle 1/2 mark (z), which is 1/2 of the posterior triangle. This is the position where the boundary between this tissue and the line extending from the lower alveolar crest line to the back intersects.
The final maxillary anterior molar 1/2 line (1) connecting the final maxillary anterior tooth mark (n) and the retroposterior triangular 1/2 mark (z) is the final maxillary index that supports mandibular movement. This is the occlusal plane in front of the bicuspid cusp position (i).
The final maxillary second premolar cusp position (i) is the apex of the final maxillary second premolar cusp.
The final maxillary second premolar cusp line (2) connecting the cervical dentate process mark (c) and the final maxillary second premolar cusp position (i) is the final point that supports maxillary movement It is the occlusal plane behind the upper second premolar cusp position (i).
Plane (3) on stainless steel plate (Fig. 4) affixed to the occlusal plane of the molar part of the maxillary wax levee
The final second premolar cusp position (i) is located within 37.0mm backward from the final maxillary anterior tooth mark (n) on the final maxillary anterior molar 1/2 line (1). The posterior line of the final maxillary second premolar cusp (2 ') is located more posteriorly.

Or, the occlusal attachment occlusal plane, which is information at the time of initial primary occlusion acquisition, the height and anteroposterior position of the temporary maxillary anterior teeth, and the upper and lower jaw occlusion By taking a head X-ray standard photograph with a high diameter, each reference point is clearly indicated as the starting point for analysis of the occlusal plane, and further, a line between the reference points is specified, and the occlusal plane is analyzed as two planes. The program gives more accurate results. This data can be applied to the production of all conventional prosthetic devices, orthodontic devices and surgical stents, or can be applied to automatic cutting by CAD / CAM and 3D printers.

The present invention helps the accurate examination diagnosis of the occlusal plane, ensures the setting of the occlusal plane related to the production of a prosthetic device that is aesthetically and functionally excellent regardless of experience, and is suitable for jaw movement By creating and assigning a proper occlusal plane, it becomes possible to determine the occlusal plane that covers all the movements of the mastication movement, and the development angle of the occlusal plane in harmony with the jaw movement can be obtained. Can be provided to the patient. Similarly, it is possible to produce a high-quality correction device and surgical stent.

In the complete denture, by setting the occlusal plane behind the upper second premolar in accordance with the present invention, the occlusal plane becomes steeper with respect to the mandibular ridge where the ski zone is generated. Since the masticatory pressure applied to the lower denture basement mucosal surface during chewing is applied in a direction perpendicular to the lower alveolar mucosa, the denture is stabilized.

Conventionally, when determining the occlusal plane on the model, setting it on one plane, or setting it, try and error depending on the sight, aesthetic judgment, dentist intuition, average value, etc. Was repeated. However, by quantitatively using these cephalometric X-ray photographs to analyze and determine the occlusal plane in an ideal state, it is possible to apply an occlusion that is in harmony with the living body, and mastication movements and thus swallowing movements can be performed. It can be done comfortably and is a very clinically significant matter.

During mastication, not only the mandibular movement (movement of the mandibular body caused by the mandibular condylar movement back and forth, left and right), but also the upper jaw moves while moving around the cervical vertebrae (DAV: Dens of Axis Vertebrae). It has been broken.
Mandibular movements, combined with tongue movements, can efficiently masticate the food mass on the mandibular occlusal surface, and can effectively operate the mastication related muscle groups to improve blood flow and lymph circulation. There is work. In this way, the anterior coupling of the dentition in the front part of the dentition needs to be given an occlusion so that the mandibular movement is in harmony with the movement of the mandibular head and is not decentered or displaced during the mandibular movement.

On the other hand, the maxillary movement works by using the weight of the skull to more efficiently chew the bolus placed on the mandibular occlusal surface with the dentition of the cervical axis (DAV: Dens of Axis Vertebrae) as the center. Therefore, it is necessary to set the occlusal plane at the rear part of the dentition to be a plane that can cope with the maxillary movement in order to further improve the efficiency of chewing during mastication.

In addition, an occlusal surface configuration that does not interfere with the occlusal cusp in the molar portion during the mandibular movement must be provided. The dentition is located from the front as a central incisor, a side incisor, a canine, a first premolar, a second premolar, a first premolar, and a second premolar.

If this dentition is divided, it can be roughly divided into a front part and a rear part.
In the upper jaw, the basal nodule of the anterior tooth corresponds to the lingual cusp in the molar part. This is the same height as the buccal cusp No. 5, but the basal nodule is lower in front of it, and the upper teeth form a tooth shape that covers the lower teeth, forming an atelier coupling . Behind that, the lingual cusp is higher, and the tooth shape of the tooth is such that the masticatory efficiency is enhanced and the vertical occlusal force can be stably received.

On the other hand, the lowest point of the curve of the Spy is at the portion corresponding to No. 5, and the Wilson curve also draws a reverse Wilson curve that draws an arc upward at the front from No. 5, and a Wilson curve that draws an arc at the rear from that . Judging from such matters, it can be seen that the role that can be taken when the oral function is exerted is different between the front and the rear at No. 5.

In order to satisfy all these conditions when performing all-maxillary dental treatment, not only harmony of mandibular movement and tooth guidance, but also occlusal high diameter, maxillary anterior teeth (possibly mandibular anterior teeth), top and bottom, front and back The determination of the target position and the setting of the two occlusal planes of the front part and the rear part from No. 5 must be performed.

The present invention will be described taking a case of a complete denture as an example.
The occlusal plane created to match the academic occlusal plane (4) and the Frankfurt plane (6) with the final occlusal height is in harmony with the upper lip and the molars. It is common to adjust the part to 1/2 of the posterior triangle.
However, unifying the occlusal plane makes a large angle with respect to the mandibular ridge, so that the artificial tooth arrangement part becomes a ski zone and the mandibular denture slides forward during mastication The acting force works, and the maintenance and stability of the denture is impaired.

The basal nodule of the upper jaw develops to form the palatal cusp, but it is the maxillary second premolar that is the same height as the buccal cusp. From these facts, the anterior Wilson curve is formed from the upper first premolar, and the Wilson curve is formed by the teeth after the second premolar.

From these facts, the part where the anterior coupling is performed when the lower jaw moves forward and laterally, the upper jaw is a tooth in front of the first premolar, and these are deeply involved in the lower jaw movement. Furthermore, it is the tooth after the second premolar that effectively functions as a crushing function of the palatal cusp of the upper jaw.

On the other hand, considering the movement of the maxilla and mandible, the mandible has a temporomandibular joint between the maxilla and mobility at this site. The maxilla is attached to the skull, and the skull is mobile at the occipital bone and cervical spine.
Therefore, the occlusal plane in front of the maxillary first premolar needs to formulate an occlusal plane for mandibular movement, and the occlusal plane in the rear of the second premolar needs to formulate for skull movement, that is, maxillary movement.

The rotation of this skull is controlled by the second cervical vertebrae (DAV: Dens of Axis Vertebrae). By inserting into the first cervical vertebra, the skull can tilt and rotate left and right. If not regulated, the movement would cause the skull to separate from the cervical spine.

From the above, the fact that the rotation axis is centered on the tooth process of the second cervical vertebra is the place where the load is least applied when supporting the movement of the skull.
For that reason, the center of maxillary movement needs to be at the center of the tooth process of this second cervical vertebra.
In addition, it is necessary to emphasize the height of the cusp of the maxillary second premolar. Considering only the maxilla at this time, for example, when the occlusal plane is set to the average height of the tooth from the demarcation point of the maxillary intrinsic bone and the maxillary alveolar bone, the error at the time of the mistake is large. Therefore, after determining the occlusal height of the upper and lower jaws, the height of the anterior teeth is determined by the upper jaw, and the lower jaw is the line of the posterior cusp of the maxillary second premolar on the line determined by half of the posterior triangle. It is necessary to determine the position and to set the occlusal plane behind it as an occlusal plane that moves around the center point of the maxillary second cervical dentate, considering that the upper jaw (ie, the skull) moves during mastication. is there.

In order to find the center point of this dental process, it is necessary to take a cephalometric radiograph and analyze it. Based on the distance and angle information obtained from them, it is possible to formulate an occlusal plane in harmony with each individual's living body on a calculation and on a computer.

Also, in many cases, the lower end of the mastoid is located on the line connecting the cusp of the maxillary second premolar and the center point of the second cervical vertebra, so that it can be used as a substitute for the center point of the second cervical dentate. It is also possible to do.

Thereby, it becomes possible to devise an occlusal plane that covers all the chewing movements. In the case of complete dentures, the occlusal plane behind the maxillary second premolar is performed in this way, so that the occlusal plane becomes steeper with respect to the mandibular ridge where the ski zone is generated. Occasionally, the mastication pressure applied to the surface of the lower denture base mucosa is more perpendicular to the lower alveolar mucosa, leading to the stability of the denture.

Hereinafter, an embodiment of the present invention will be described based on drawings of a complete denture case.
To make the occlusal plane more reliable, it is necessary to determine the occlusal plane using the patient's cephalometric X-ray photograph so as to achieve consistency with the skull.
For this purpose, a personal ideal occlusal plane is established by attaching a stainless sphere, a stainless steel plate, or the like to the reference patient element and taking a cephalometric radiograph. At the time of initial occlusion acquisition, information on anatomical indicators should be clearly indicated on the cephalometric radiograph.

A stainless steel plate (G) parallel to the Kampel plane is pasted on the cheekbone arch (Fig. 1). A stainless steel ball (FIGS. 1, 2 and 3) is attached to the average condylar center point and the lower nose, and a stainless steel plate for measuring the reference is attached to the maxillary wax levee. (Fig. 4, 5, 6, 7)
Accordingly, the position of the front teeth, the form of the jawbone, and the occlusal plane can be determined.

By embedding a stainless steel ball to measure the reference in the lower jaw wax levee, or attaching a stainless steel tape, the position of the lower jaw tooth, the starting point of the posterior triangle and 1/2 of the posterior triangle can be determined. (Figs. 6 and 7)

Thereafter, a cephalometric radiogram is taken (FIG. 8).
An appropriate occlusal plane is set by taking and analyzing a cephalometric radiogram, and a Gothic arch is obtained for this occlusal plane. The method is shown below.
First, Or (Orbitale) (a), Po (Porion: upper ear canal) (b), ANS (Anterior Nasal Spine) (r), PNS (Posterior Nasal Spine) , Posterior triangle 1/2 (z), Xi point (h), D-point (p) (or Pm point. Mandibular anterior teeth when bone resorption occurs and the Pm point is not clear like a complete denture (Use the D-point which is the center of the thigh bone) (Figure 9).
In Fig. 9, D-point (p) is substituted, the dentinal process (DAV: Dens of Axis Vertebrae) of the cervical axis is clearly shown, the center is obtained by drawing, and the center of the second cervical axis dental process (DAV) The cervical vertebral axis mark (c) is determined

For Xi-point (h), pass through the mandibular leading edge (t), draw a line perpendicular to the Frankfort horizontal plane (d), and then pass through the mandibular notch lowest point (v) in Frankfurt. Draw a line parallel to the plane (Frankfort horizontal plane) (e). Next, a line perpendicular to the Frankfurt plane is drawn through the trailing edge of the mandibular branch (s) (f). Furthermore, it passes through the lowest point of the lower jaw notch (v), draws a line (s) perpendicular to the Frankfurt plane (Frankfort horizontal plane), passes through the line overlapping the lower edge of the lower jaw, and is parallel to the Frankfurt plane (Frankfort horizontal plane). Draw a line (g). Let xi-point (h) be the intersection of the diagonals of the quadrilateral constructed in the above procedure. (Fig. 10, 11)

The patient-specific occlusal height is set to the ideal height based on the angle formed by ANS, Xi-point, and D-point (pm) and anatomical indices.

Enter the line 3 (this is the plane on the stainless steel plate (Fig. 4) affixed to the occlusal plane of the molar part of the maxillary wax levee) (attached to the articulator at this plane) . The final maxillary anterior tooth mark point (n), which is the final position of the maxillary front tooth incisal position, is determined. The degree of protrusion is determined with reference to ANS (Anterior Nasal Spine) (r). It is judged from n (FIG. 10).

Next, the cusp of the final maxillary second premolar is established within 37.0 mm backward on line 1 from point n (i). A line is once drawn from the point i toward the cervical dentate crest point c and extended forward (2). (Fig. 9)

Find the angle C between line 3 and line 2.

The occlusal plane plate for the attachment of the articulator is set to the angle C obtained above, and the occlusal plane behind the point i is formulated. (Fig. 9)

Subsequently, an angle D formed by the second line and the first line is obtained.

The occlusal plane plate for attaching the articulator is set to the angle D obtained above and the occlusal plane ahead of the point i is determined. (Fig. 9)

A rear occlusal plane is established for the line from i to the back Z on the 1 line, and an anterior occlusal plane is established for the line from i to the front n on the 1 line.
Thus, the two occlusal planes are determined. (Fig. 9)

As a result of performing the functional evaluation of the patient and the dentist who is the surgeon on the complete denture prepared based on this, the prosthesis prepared based on the occlusal surface determined by the conventional method Compared to the device, it was found that the prosthetic device produced based on the occlusal plane determined by analysis of the two occlusal planes improved both in terms of aesthetics and functionality. (Table 1)

The present invention is a method for determining an occlusal plane that is necessary for analyzing an occlusal plane with high reproducibility and for producing an aesthetically and functionally high-quality prosthetic device. Since the prosthetic device produced by this is aesthetically and functionally harmonized with the living body, this is not limited to the case where the prosthetic device is produced on an articulator. It is possible to make surgical stents with milling or 3D printers by using devices, set-ups, orthodontic devices using CAD / CAM brackets, and diagnostic mock-ups. is there. It can also be applied to the production of prosthetic devices using virtual articulators by analysis programs using cephalometric radiographs and CT images, and in a shorter time and with higher quality than conventional methods. It is possible to provide a patient with a prosthetic device, a correction device, and a surgical stent.

Patient temporal reference Stainless steel ball for photography affixed to cellophane tape Lower nose and stainless steel ball Maxillary occlusal floor (view of occlusal surface) Maxillary occlusal floor (view of mucous membrane) Mandibular occlusal floor (occlusal perspective) Mandibular occlusal floor (mucosal surface view) Head x-ray Line drawing of the target point (anatomical landmark) confirmed on the cephalometric radiograph Head X-ray photograph analysis chart (Line segment connecting the gauge points with a line) Cephalometric analysis Head X Ship Photo Analysis Diagram Line Drawing of Figure 12

1 Line of the final maxillary anterior teeth inside the lips and the posterior triangular half 1/2 Line 1 'final maxillary subject 2nd premolar cusp final maxillary anterior segment 2 Temporary maxillary second premolar cusp Line 2 connecting the central point of the dentition on the cervical axis 2 'Line connecting the central point of the posterior maxillary second premolar cusp and the central point of the cervical axis 4 Plane for attaching the articulator parallel to the upper arch of the articulator 4 Camper Plane 5-a Mandibular molar ridge line 5-b Rear mandibular ridge line 6 Frankfort horizontal plane
7 Line connecting Xi point and ANS (anterior nose spine) 8 Line connecting Xi point and D point (or Pm point) 9 Dashed line connecting the position of ANS (anterior nose spine) and final maxillary anterior teeth

a Or (Orbitale) infraorbital point
b Po (Porion) upper ear canal
c Dens of Axis Vertebraez
d A line perpendicular to the Frankfurt plane (Frankfort horizontal plane) that passes through the leading edge of the mandibular branch
e Line passing through the lowest point of the mandibular incision and parallel to the Frankfort horizontal plane
f A line that passes the trailing edge of the mandibular branch and is perpendicular to the Frankfort horizontal plane
g Follow the lowest point of the mandibular notch, draw a line perpendicular to the Frankfort horizontal plane, and follow the line that overlaps the midpoint of the lower jaw lower edge (the midpoint of the height of the lower jaw lower left and right) Line parallel to the plane (Frankfort horizontal plane)
h Xi points
i Location of the final maxillary second premolar tip
k Intersection of line 2 and line 3
m Position of maxillary anterior incisor on maxillary wax ridge at the time of initial occlusion acquisition
n Final maxillary incision position
o Calculated maxillary anterior incision to determine posterior occlusal plane
p D point
r ANS (front nose spine)
s Line (e) parallel to the Frankfort horizontal plane passing through the lowest point of the lower jaw notch (v) and a line perpendicular to the frankfort horizontal plane (rear white dashed line)
t Mandibular branch leading edge
v Mandibular notch lowest point
w Mandibular branch trailing edge z posterior triangle 1/2

A Distance of front occlusal plane (short arrow)
B Distance between k and m (long arrow)
C Angle formed by the line (2) connecting the final maxillary second premolar cusp and the central point (c) of the cervical axis tooth process and the articulator mounting plane (3) parallel to the articulator upper arch
D Line connecting the final maxillary second premolar cusp and cervical axis center point (c) (2) and the position of the final maxillary anterior incisor on the inside of the lip and 1/2 of the posterior triangle Angle formed by (1)
E Cellophane tape
F Stainless steel ball (on skin)
G Stainless plate
H Stainless plate for reflecting the position of the virtual upper incisal edge on the image of the cephalometric radiograph
I Stainless plate for reflecting 21 midline of maxillary posterior and midmaxillary palatal mucosa on the image of cephalometric radiograph
Stainless plate to reflect on the articulator mounting plane (3) parallel to the upper bow of the articulator on the image of J-head X-ray standard photograph
Stainless steel plate for reflecting the cusp of the virtual upper second premolar on the image of K-head X-ray standard photograph
L Wax rim
M Base plate
N Stainless steel plate for reflecting virtual mandibular incisor on the image of cephalometric radiograph
O Stainless steel ball showing posterior triangle 1/2

Claims (4)

An occlusal plane determination method,
The cervical axis odontoid mark (c) at the center of the second cervical dentate process (DAV) and the final maxillary second premolar cusp position at the final maxillary second premolar cusp (i ) Cervical axis odonto process mark (c) and final maxillary second premolar cusp position (i) An occlusal plane determination method including an occlusal plane determination step of determining an occlusal plane so as to include the line (2) as a part of the occlusal plane. An occlusal plane determination method,
Cervical dentate process mark (c) at the center of the second cervical vertebra axis (DAV) and final maxillary second premolar cusp position at the final maxillary second premolar cusp (i) In the image of the cephalometric radiograph having the final maxillary anterior tooth mark (n) on the maxillary anterior tooth and the posterior triangle 1/2 mark (z) on the posterior triangle 1/2,
Determine the final maxillary anterior molar 1/2 line (1) connecting the final maxillary anterior tooth mark (n) and the retroposterior triangular 1/2 mark (z). Decision stage,
The final maxilla, which is the position of the cusp of the final maxillary second premolar at a position within 37.0 mm posteriorly from the final maxillary anterior tooth mark (n) on the final maxillary anterior molar 1/2 line (1) Final maxillary second premolar cusp decision stage to determine the second premolar cusp position (i),
Cervical dentate center determining the final maxillary second premolar cusp line (2) connecting the cervical vertebra dentate mark (c) and the final maxillary second premolar cusp position (i) Final maxillary second premolar cusp line determination stage,
Cervical axis dentition center final maxillary second premolar cusp line (2) and final maxillary line, which is the line connecting the cervical axis odontoid mark (c) and final maxillary second premolar cusp position (i) Occlusion determining the occlusal plane to include the final maxillary second premolar cusp final maxillary anterior line (1), which is the segment connecting the bicuspid cusp position (i) and the final maxillary anterior tooth mark (n) An occlusal plane determination method comprising a plane determination step. An occlusal plane determination program,
The cervical axis odontoid mark (c) at the center of the second cervical dentate process (DAV) and the final maxillary second premolar cusp position at the final maxillary second premolar cusp (i ) Cervical axis odonto process mark (c) and final maxillary second premolar cusp position (i) An occlusal plane determination program having an occlusal plane determination step for determining an occlusal plane so as to include the line (2) as a part of the occlusal plane. An occlusal plane determination program,
Cervical dentate process mark (c) at the center of the second cervical vertebra axis (DAV) and final maxillary second premolar cusp position at the final maxillary second premolar cusp (i) In the image of the cephalometric radiograph having the final maxillary anterior tooth mark (n) on the maxillary anterior tooth and the posterior triangle 1/2 mark (z) on the posterior triangle 1/2,
Determine the final maxillary anterior molar 1/2 line (1) connecting the final maxillary anterior tooth mark (n) and the retroposterior triangular 1/2 mark (z). Decision stage,
The final maxilla, which is the position of the cusp of the final maxillary second premolar at a position within 37.0 mm posteriorly from the final maxillary anterior tooth mark (n) on the final maxillary anterior molar 1/2 line (1) Final maxillary second premolar cusp decision stage to determine the second premolar cusp position (i),
Cervical dentate center determining the final maxillary second premolar cusp line (2) connecting the cervical vertebra dentate mark (c) and the final maxillary second premolar cusp position (i) Final maxillary second premolar cusp line determination stage,
Cervical axis dentition center final maxillary second premolar cusp line (2) and final maxillary line, which is the line connecting the cervical axis odontoid mark (c) and final maxillary second premolar cusp position (i) Occlusion determining the occlusal plane to include the final maxillary second premolar cusp final maxillary anterior line (1), which is the segment connecting the bicuspid cusp position (i) and the final maxillary anterior tooth mark (n) An occlusal plane determination program including a plane determination stage.