CN106725942B

CN106725942B - Lower jaw movable average value articulator

Info

Publication number: CN106725942B
Application number: CN201611231850.8A
Authority: CN
Inventors: 王惠元; 李涛; 李换粉
Original assignee: Shijiazhuang Medical College
Current assignee: Shijiazhuang Medical College
Priority date: 2016-12-28
Filing date: 2016-12-28
Publication date: 2023-06-23
Anticipated expiration: 2036-12-28
Also published as: CN106725942A

Abstract

Movable average of lower jawAnd (5) a value articulator. The protrusion and side Fang draft were determined as average values. The two side condylar guide plates are inclined 15 degrees to the median line and fixed on two sides of the upper jaw body, so that two side condylar rods vertically penetrating through the condylar guide plates are intersected backwards and inwards by 150 degrees, the inner side edges of the condylar grooves form an angle of 15 degrees with the midline of the articulator, and the outer side edges of the condylar grooves are parallel with the midline. Because the shape of the condylar groove is matched with the horizontal projection graph when the condyloid process moves laterally, the protrusion and lateral movement of the mandible can be more accurately simulated. According to the Balkwill angle and Bonwill triangle average value, the position relationship between the mandibular model and the condylar ball is determined by using the mandibular model locating plate and the locating needle at the front part of the mandibular model locating plate, so that the dentition model can be positioned on

The opening and closing arc on the frame is close to the opening and closing arc of the hinge of the patient. When the bracket is used for erecting the articulator, the articulator is suspended, and the mandible can be conveniently pushed to extend forwards or laterally.

Description

Lower jaw movable average value articulator

Technical field:

the invention relates to a special occlusion frame for oral cavity restoration.

The background technology is as follows:

in the prior art, the average articulator has a fixed intercondylar distance, a fixed anterior condylar conduction slope and a tangential conduction slope. The shape of the condyle groove is a groove with two parallel sides, and the two side condyle rods are in a linear position relationship, so that the structure is difficult to accurately simulate the protrusion and lateral movement of the condyle. At the same time, the average articulator has not shifted the patient's hinge axis position, and it is therefore difficult to model the dentition in

The opening and closing arc on the frame is matched with the opening and closing arc of the hinge of the patient. In addition, the mandible is required to move the upper jaw to simulate extension or lateral movement, which is somewhat inconvenient.

The invention comprises the following steps:

the invention aims to avoid the defects of the prior art and provide a method for manufacturing corresponding parts of the articulator according to the average numerical value of each relevant part of the oral anatomy of a human body, so as to simulate the hinge opening and closing movement and the lateral movement of a patient to a greater extent.

The object of the invention is achieved by the following measures: the condylar pilot slope and the tangential pilot slope of the anterior extension were determined as average values. The lateral Fang taper is determined by tilting the two-sided condylar guide disc 15 ° toward the midline and securing it to both sides of the maxilla, the condylar notch being shaped with its medial edge at an angle of 15 ° to the midline and its lateral edge parallel to the midline of the articulator. The two side condylar rods vertically passing through the condylar guide disc are intersected backwards and inwards to form a condylar axis intersection angle which meets the average value of human anatomy (the average value of normal human condylar axis intersection angles is 145-160 degrees).

The object of the invention is also achieved in that: determining mandibular model by mandibular model locating plate and locating needle in front of mandibular model locating plate

The position of the plane and the near-middle contact area of the incisors in the lower jaw is matched with the average position of which the Balkwill angle is 26 degrees and the Bonwill triangle side length is 10.5 cm.

When the bracket retaining groove on the upper jaw body of the occluding frame is sleeved into the bracket locating key at the upper end of the bracket upright post, the whole occluding frame is suspended, and the purpose of extending the lower jaw body forwards or laterally can be realized.

Compared with the prior art, the invention has the following advantages: 1. has a fixed lateral condylar conduction slope of 15 degrees, and the shape of the condylar groove is matched with the horizontal projection graph when the condyloid process moves laterally. 2. The condyle bar intersection angle 3 which accords with the average value of human anatomy structure is provided with the positioning device which can determine the average value of Balkwill angle and Bonwill triangle, thereby ensuring the position relation between the mandibular model and the hinge axis. 4. The lower jaw is movable.

Description of the drawings:

fig. 1 is a schematic view of the overall structure of the articulator.

FIG. 2 is a three-view of the maxilla

FIG. 3 is a schematic view of the connection of the condylar-guiding disc, the condylar rod, and the vertical portion of the mandible

FIG. 4 is a three view of a condylar-guiding disc

FIG. 5 is a schematic view of a mandibular model positioning plate structure

FIG. 6 is a schematic view of a stent structure

In the figure, 1. Maxilla, 2. Condylar guide disc, 3. Condylar groove, 4. Condylar ball, 5. Condylar rod, 6. Mandibular vertical portion, 7. Mandibular model locating plate, 8. Mandibular model locating plate vertical portion, 9. Locating slot, 10. Locating needle, 11. Mandibular frame ring, 12. Mandibular midline, 13. Screw, 14.15. Spring hook, 16. Locating rod, 17. Maxillary frame ring, 18. Bracket retention slot, 19. Bracket locating key, 20. Bracket upright

The specific embodiment is as follows:

referring to fig. 1 and 2, both ends EE 'and FF' of the maxillary body (1) are inclined to the midline by 15 ° respectively, the condylar guide disc (2) is fixed to both ends of the maxillary body (1) with screws (13) with the centers of the condylar balls (4) on both sides being spaced apart by 10.2cm (the average value of the human condyloid process centers is 10.16 cm).

Referring to fig. 3, the condyle stems (5) vertically passing through the double-sided condyle guide disc (2) intersect posteriorly and inwardly by 150 ° and are fixed to the upper end of the mandibular vertical part (6).

Referring to fig. 1 and 4, the medial edge BB 'of the condylar groove (3) is parallel to the medial edge AA' of the condylar-guide disc at an angle of 15 ° to the midline of the articulator, and the lateral edge CC 'of the condylar groove (3) is open to the outside at an angle of 15 ° to the lateral edge DD' of the condylar-guide disc, i.e. parallel to the midline of the articulator. This structure enables the condylar ball (4) to slide forward along the outer edge CC 'of the condylar groove (3) during opening and closing movements, and to slide forward and inward along the inner edge BB' of the condylar groove (3) during lateral movements.

Referring to fig. 1 and 3, the oblique line distance from the root of the needle (10) to the center of the condylar sphere (4) was set to 10.5cm (this is the average value of the Bonwill triangle side lengths), and the horizontal distance from the center of the condylar sphere (4) was set to 9.4cm (10.5×cos26 °). The vertical height from the lowest end of the positioning groove (9) to the center of the condylar ball (4) was set to 4.6cm (10.5×sin26 °) to satisfy the Balkwill angle of 26 °.

Referring to FIG. 3, FIG. 5, FIG. 1, on a model

When the upper and lower model is put on the frame, the lower jaw model positioning plate (7) is used for determining the position of the lower jaw model, and after gypsum is hard and fixed, the upper jaw model is fixed on the upper jaw body frame ring (17) according to the alignment relation of the upper and lower models. The specific method comprises the following steps: 1. mixing gypsum and stacking on the lower jaw body frame ring (11), placing the lower jaw model onOn plaster and align the midline of the model with the mandibular midline (12). 2. A positioning rod (16) on the positioning plate (7) is inserted into a positioning groove (9) on the vertical mandibular part (6) from front to back, so that the vertical mandibular model positioning plate (8) is contacted with the vertical mandibular part (6). 3. The mandibular model locating plate (7) and the locating rod (16) are pressed vertically downwards until the locating rod (16) is pressed to the lowest end of the locating groove (9), and the mandibular central incisor contact point of the model is adjusted to be aligned with the locating needle (10). The position of the mandibular model is exactly at the anatomical mean position of the Balkwill angle and the Bonwill triangle, and the position relation between the mandibular model and the hinge axis is determined. The mandibular model can simulate the mandibular movement of a patient more accurately by making opening and closing movements and lateral movements at this position.

Referring to fig. 1 and 6, the entire articulator is suspended when the bracket locating key (19) at the upper end of the bracket post (20) is inserted into the bracket retaining slot (18). A soft spring is hung on the spring hooks (14) and (15) respectively to prevent the mandible from sagging, and the mandible can be pushed to extend forwards and move laterally at the moment.

Claims

1. The utility model provides a movable average value interlock frame of lower jaw, includes the upper jaw body, the lower jaw body, condylar guide disc, fixed intercondylar distance, fixed preceding condylar guide slope and cuts the guide slope, characterized by: the positioning groove is positioned on the vertical part of the mandible body, the positioning rod on the positioning plate is inserted into the positioning groove on the vertical part of the mandible body from front to back, and the positioning needle is positioned at the front part of the mandible model positioning plate;

according to the average value of the lateral condylar guide slope, the two-side condylar guide disc is inclined 15 degrees to the midline and fixed at two sides of the maxillary body; the two side condyle rods vertically penetrating through the condyle guiding disc are intersected backwards and inwards and fixed at the upper end of the vertical part of the mandibular body to form a condyle axis intersection angle which accords with the human anatomy average value; the inner side edge of the condyle groove forms an angle of 15 degrees with the central line of the articulator, and the outer side edge of the condyle groove is parallel with the central line of the articulator, so that the condyle ball can slide forwards along the outer side edge of the condyle groove when in opening and closing movement and slide forwards and inwards along the inner side edge of the condyle groove when in side movement; the oblique line distance from the root of the positioning needle to the center of the condylar ball is defined as the average value of the edge length of the Bonwill triangle, the horizontal distance from the root of the positioning needle to the center of the condylar ball is defined as 9.4cm, the vertical height from the lowest end of the positioning groove to the center of the condylar ball is defined as 4.6cm so as to meet the requirement that the Balkwill angle is 26 degrees, the positioning needle in front of the positioning plate is utilized to determine the plane of the mandibular model and the position of the contact area near the middle of the incisor in the mandible, the position is matched with the average value position of the edge length of the Bolkwill triangle being 26 degrees, and the position relationship between the mandibular model and the condylar ball is determined.