CN205758742U - A kind of expansion arcuate activator for correcting II class misfit - Google Patents

Abstract

An arch expander type muscle activator for correcting Class II malocclusion, which relates to the field of medical devices and includes a base, which is characterized in that the base is composed of two parts: a left base and a right base; the base includes wearing Plastic caps for the upper anterior teeth and lower anterior teeth in the anterior teeth area, the palatal base on the palatal cover of the oral cavity and the vertical wing on the lingual side of the lower dentition when worn, and between the occlusal surface of the upper and lower posterior teeth The interocclusal part between; the distal part of the base reaches the distal part of the upper and lower first permanent molars; the arch expander muscle activator also includes a spiral expander and two traction hooks; the left base and the right base The brackets are connected by a spiral expander; the traction hooks correspond to the mesial sides of the maxillary canines. The utility model has the advantages of reasonable design, low cost and convenient wearing and use, and is suitable for patients with early type II high-angle malocclusion, especially cases with open lips and teeth.

Description

An arch expander activator for correcting class II malocclusions

technical field

The utility model relates to the field of medical equipment, in particular to an arch expander muscle activator for correcting Class II malocclusion.

Background technique

Class II malocclusion is a relatively common dentognathic deformity in clinical practice, with mandibular retrusion, maxillary protrusion, open lips and teeth showing, which greatly affects the appearance of patients. Early treatment of Class II malocclusion can block or alleviate the development of the deformity in most cases, and reduce the difficulty of subsequent fixed orthodontic treatment. The traditional muscle activator appliance for Class II malocclusion usually consists of a plastic base without retaining clasps or force-generating devices that generate mechanical force. The upper part of the base covers the entire palatal cover, and the lower part of the base Extending down to the floor of the mouth, the base reaches distal to the first permanent molar. The upper and lower bases are connected to form a lower incisor plastic cap in the anterior region to press the lower anterior teeth, and its function is to prevent the vertical eruption of the lower incisors and the lip tilt. There is a hyperbolic labial arch between the maxillary canines, which can transmit the corrective force of the muscles to the upper anterior teeth. If the palatal side of the upper anterior teeth, including the base of the alveolar part, is adjusted and buffered, the upper anterior teeth will be under the influence of the labial arch. Move palatally obliquely. The back teeth of the base have tooth induction surfaces. By adjusting and grinding the plastic induction surfaces, the vertical eruption of the back teeth can be controlled and guided. However, the traditional myoactivator for class II malocclusions has the following disadvantages: (1) the base area is large, the patient is not comfortable to wear, and is prone to nausea; (2) the upper anterior teeth are retracted through the lip arch, and the strength is small Unable to depress the upper anterior teeth, so the inhibition effect on the forward and downward growth of the maxilla is poor; (3) For patients with narrow upper and lower dental arches, synchronous expansion of the upper and lower arches cannot be achieved because there are no expansion parts; (4) For patients with open lips and teeth, the pendulum effect cannot be eliminated when the lip arch is retracted, so that the upper anterior teeth are exposed too much; (5) For the case where the spee's curve of the mandible is too large, there is no gap between the lingual side of the lower incisor and the base contact surface. For cushioning reasons, the depression of the mandibular incisors cannot be achieved either.

Utility model content

In view of the above-mentioned deficiencies in the background technology, the object of the present invention is to provide an arch expander muscle activator for correcting Class II malocclusions, which can realize synchronous up and down arch expansion while correcting malocclusions.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

An arch expander muscle activator for correcting class II malocclusion, comprising a base, characterized in that the base is composed of two parts, a left base and a right base; the base includes a Plastic caps for the upper anterior teeth and plastic caps for the lower anterior teeth, the palatal base on the palatal cover of the oral cavity and the vertical wing on the lingual side of the lower dentition when worn, and the occlusal space between the occlusal surfaces of the upper and lower posterior teeth part; the distal end of the base reaches the distal end of the upper and lower first permanent molars; the arch expander type muscle activator also includes a spiral expander and two traction hooks; the left base and the right base are expanded by spiral connected with the device; the hooks correspond to the mesial sides of the maxillary canines.

The arch expander type muscle activator for correcting class II malocclusion is characterized in that: the plastic cap of the upper anterior teeth embeds the 1/2 crown of the upper incisor, and the plastic cap of the lower anterior teeth embeds the crown of the upper incisor. 1/2 crown of lower incisor.

The arch expander type muscle activator for correcting Class II malocclusion is characterized in that: the spiral expander is fixedly connected to the palatal base of the left base and the right base respectively, and the spiral expander The legs of the device are embedded in the base material.

The arch expander muscle activator for correcting Class II malocclusion is characterized in that: the palatal base covers 1/2 of the palatal cover.

The arch expander type muscle activator for correcting Class II malocclusion is characterized in that: the base is made of resin; the plastic caps of the upper front teeth and the labial side of the plastic caps of the lower front teeth The resin thickness is 2mm.

The arch expander type muscle activator for correcting Class II malocclusion is characterized in that: the traction hook is made of stainless steel wire, and its cross-sectional circle diameter is 0.9mm.

The described arch expander muscle activator for correcting class II malocclusion is characterized in that: the vertical wing plate does not directly contact the lingual side of the lower incisor, and leaves a gap between its base and the lingual side of the lower incisor. 0.5-1mm gap.

In the present invention, by designing the left base and the right base, and adding a helical expander between the left and right bases, synchronous up and down expansion can be realized while the malocclusion is corrected. Specifically, the present invention has the following beneficial effects: (1) Leading the mandible forward: the mandible protrudes forward, the lower incisors occlude with the plastic cap of the lower anterior teeth, and the anterior teeth are in a tangential state to achieve this effect. (2) Retracting and depressing the upper anterior teeth: Connecting the J-hook with a high-position head cap and the traction hook, and grinding away the plastic on the palatal side of the upper incisors to achieve this effect. (3) Vertical lowering of the lower anterior teeth: This effect is achieved by grinding away the lingual plastic of the lower incisors. (4) Expansion: For patients with narrow upper and lower dental arches, this effect can be achieved by adding force to the helical arch expander. (5) Inhibit the forward and downward growth of the maxilla. The J-hook and the high-position head cap are connected with the traction hook, and about 500g of orthopedic force is applied on both sides to achieve this effect. (6) Counterclockwise rotation of the mandibular plane: This effect is achieved by driving the mandible forward while depressing the upper and lower anterior teeth. In conclusion, the arch expander muscle activator is reasonable in design, low in cost, easy to wear, and suitable for patients with early class II high-angle malocclusion, especially those with open lips and teeth.

Description of drawings

Fig. 1 is the top view structure schematic diagram of the present invention;

Fig. 2 is the structural schematic diagram of looking up of the present invention;

Fig. 3 is the front view structure schematic diagram of the present invention;

Fig. 4 is the rear view structure schematic diagram of the present invention;

Fig. 5 is a schematic diagram of the front structure of the present invention when in use;

Fig. 6 is a schematic diagram of the side structure when the present invention is in use;

Among them: 1-base; 1-1-upper anterior teeth plastic cap; 1-2-lower anterior teeth plastic cap; 1-3-palatal base; 1-4-vertical wing plate; 2-traction hook; 3 - Helical expander.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

The present invention provides an arch expander muscle activator for correcting Class II malocclusion, which mainly includes a base 1, two traction hooks 2 and a spiral expander 3, see Figs. 1-4. The muscle activator is transformed from a traditional muscle activator. The traditional base 1 is an integral structure. The base designed by the present invention is divided into two parts, the left base and the right base, which are located on the midline of the dentition. The part on the left side is called the left base, and the part located on the right side of the midline of the dentition is called the right base; the left base and the right base are respectively integrally formed by resin, and both include the upper anterior teeth worn in the anterior teeth area. The plastic cap 1-1 and the plastic cap 1-2 of the lower front teeth are positioned at the palatal base 1-3 of the palatal cover of the oral cavity when worn, and the vertical wing plate 1-4 positioned at the lingual side of the lower dentition; The interocclusal part between the occlusal surfaces of the posterior teeth; the left base and the right base are connected by a spiral expander 3, and the spiral expander 3 is fixedly connected with the left and right two palatal bases 1-3 respectively, and the spiral The legs of the expander 3 are embedded in resin, and the structure of the spiral expander 3 is in the prior art, and will not be repeated here. The adjustment hole in the middle of the spiral arch expander 3 is not embedded by resin, and the arc size formed between the left base and the right base is realized by adjusting the hole. The traction hook 2 corresponds to the mesial of the canines on both sides of the upper jaw, and is a stainless steel wire, and the effect is better when the cross-sectional circle diameter is 0.9 mm.

The plastic cap 1-1 of the upper anterior teeth embeds 1/2 crown of the upper incisors, and the plastic cap 1-2 of the lower anterior teeth embeds 1/2 crown of the lower incisors. To exercise the lip muscles and enhance muscle tension, the effect is better when the thickness of the resin is 2mm. In addition, the palate base 1-3 of the device covers 1/2 of the palate cover, which greatly reduces the contact area with the palate, thereby reducing nausea and other discomfort reactions of patients.

During use, the tow hook 2 needs to be used in conjunction with the high head cap and the J hook, the inside of the mouth of the J hook catches the tow hook 2, and the outside of the mouth is connected with the high head cap. The added force is about 500g on one side, which belongs to orthopedic force. This prevents the forward growth of the maxilla. At the same time, by grinding away the base plastic on the palatal side of the upper anterior teeth, the upper anterior teeth are depressed and adducted, and the vertical development of the anterior jaw is controlled. Depressing the upper and lower anterior teeth while leading the mandible is beneficial to reduce the mandibular plane angle, that is, the sagittal counterclockwise rotation of the mandible, thereby improving the patient's facial shape.

When correcting Class II malocclusion, the main operation steps are as follows (the methods and methods used by those skilled in the art that are not specifically described below):

1. Prepare dental model.

2. Cephalometric analysis: the growth direction of the upper and lower jaws of the patient; patients with vertical growth need to control the vertical height to avoid the increase of the mandibular plane angle. The difference between the position and size of the upper and lower jaw bases is used to calculate the protruding amount of the mandible; the axial inclination and position of the upper and lower incisors is used to calculate the retraction amount of the upper anterior teeth.

3. Prepare the arch expander muscle activator: place occlusal wax in the patient's mouth; when the coverage of the upper and lower anterior teeth is less than 10mm, let the patient's mandible protrude to the position where the anterior teeth are incised and aligned with the midline of the dentition (due to the patient's own There is no need to align the midline due to the misalignment of the teeth, and other treatments will be performed after the malocclusion is corrected); the vertical opening of the anterior tooth area is 2-4mm; the occlusal relationship is taken, and the expanded arch type designed by the present invention is prepared according to the occlusal relationship Muscle activator; when the upper and lower anterior teeth cover more than 10mm, the mandible needs to be advanced step by step; the upper incisors are severely tilted, and the upper incisors need to be vertical; some teeth with obvious eruption on the lingual side need to be aligned with other aligners. The general principle of occlusal reconstruction: when the mandibular advancement is 7-8mm, the vertical opening should be 2-4mm; when the mandibular advancement is 3-5mm, the vertical opening should be 4-6mm. In addition, it is also necessary to check whether there is early contact between the upper and lower dentition, occlusal interference and forced displacement of the mandible; whether there is snapping and friction sound in the temporomandibular joint; respiratory function.

4. Correction: Wear the prepared arch expander muscle activator in the patient's mouth. The traction hook 2 needs to be used with the high head cap and the J hook. The inner part of the J hook hooks the traction hook 2, and the outside of the mouth is connected to the high head cap. Usually, the spiral expander is strengthened by the patient once a week, and the expansion is 1mm each time; the interval between follow-up visits is 4 weeks; the base plastic on the palatal side of the upper anterior teeth is adjusted to 0.5-1mm at each visit; check whether the lingual side of the lower incisors is consistent with the base If there is contact with the rest, it needs to be adjusted by 0.5-1mm; a small amount of adjustment is required to grind the area where the buccal side of the maxillary molars is in contact with the base. The J hook is connected to the traction hook part of the muscle activator, cooperates with the high-position headgear outside the mouth, and applies a unilateral orthopedic force of about 500g, and the patient wears it for more than 12 hours a day. Finally, the patient should reach the state where the anterior teeth are in the edge-to-edge engagement and the posterior teeth have an occlusal contact relationship, that is, the treatment goal is achieved.

The technical features not described in the utility model are all known technologies of those skilled in the art, and will not be repeated here.

Claims (3)

1. for correcting an expansion arcuate activator for II class misfit, including base (1), it is characterised in that described base (1) It is made up of left base and right base two parts；Upper Anterior Teeth plastic cement cap (1-1) that base (1) includes being worn on labial teeth district and lower labial teeth Plastic cement cap (1-2), is positioned at the palatine base (1-3) of oral cavity palate cap and is positioned at the perpendicular web of mandibular dentition tongue side when wearing (1-4) part between the tooth conjunction, and between upper lower jaw posterior occlusion face；Base (1) remote in reach the permanent mill of lower jaw first During tooth is remote；Described expansion arcuate activator also includes an expansion screw (3) and two hooks (2)；Left base and the right side Base is connected by expansion screw (3)；Described hook (2) corresponding to upper jaw both sides canine tooth near in.

A kind of expansion arcuate activator for correcting II class misfit the most according to claim 1, it is characterised in that: described 1/2 corona of incisor in Upper Anterior Teeth plastic cement cap (1-1) embedding, 1/2 corona of lower labial teeth plastic cement cap (1-2) embedding lower incisor.

A kind of expansion arcuate activator for correcting II class misfit the most according to claim 1, it is characterised in that: described Expansion screw (3) is fixing with the palatine base (1-3) of left base and right base respectively to be connected.