JP4875944B2 - Denture check bite method - Google Patents

Description

The present invention, in order to inspection and adjustment of the occlusion of the denture, about the check byte method to record the correct occlusion.

  When checking and correcting the occlusal relationship of the denture, a correct bite position is recorded by performing a check bite, and the occlusion is corrected by re-attaching the denture to the articulator based on the record.

  The conventional check bite is a strip of a soft material such as thermoplastic paraffin wax, pressed against the occlusal surface of the lower denture, and then pressed with a heated trowel (spatula) to make the entire material even To soften. Thus, the denture is mounted in the oral cavity, the upper and lower jaws are bitten, and the opposing relationship of the upper and lower jaw artificial teeth is recorded as indentations on the upper and lower surfaces of the wax. The upper and lower jaw dentures are reattached to the articulator with the check bit (wax remaining on the bite) in between, and the occlusal displacement is corrected by grinding or rearranging the artificial teeth.

  In such a check bite, it is necessary to stop the bite immediately before the upper and lower artificial teeth come into contact with each other. However, because the patient bites too deeply, there is a hole in the wax, the upper teeth and the lower teeth are in direct contact with each other, and a portion of the denture base is lifted from the ridge or shifted to the front, back, left and right. Often no record is available. In addition, it is necessary to heat and soften the bite wax evenly to the inside before occlusion, but since the softening is not uniform, the hard part may become a fulcrum and the denture may be displaced in the middle of closing. In addition, patients who need dentures have a loss of periodontal sensation, and are usually significantly inferior to the sense of touch and pressure compared to natural dentitions. It may be difficult to detect.

  For this reason, the conventional check bite has low reproducibility, the correction of the occlusion of the denture after remounting tends to be inaccurate, and the mounted denture is likely to have a rattle or pain.

  An object of the present invention is to provide a method for obtaining an accurate and reproducible check bite by using a material instead of wax.

In this invention, the occlusal cushion piece is bitten by the left and right molar parts of the upper and lower jaw dentures installed in the oral cavity of the patient, and the recording material is injected into the gap between the upper and lower jaw dentures in the bitten state, and is cured to fix the occlusal position. It is recorded (Claim 1) . Since the cushion piece has elasticity, the patient can bite it while tapping, and if the occlusal relationship between the upper and lower jaw dentures is recorded while being bitten, the patient's original center fitting position can be recorded. . Remove the upper and lower jaw dentures from the oral cavity, remove the cushion pieces, and reattach them to the articulator. Thus, the occlusal state is checked and the occlusion is adjusted.

According to this method, since there is no need to adjust the occlusion, a check bite can be performed in a short time, and there are few failures compared with a method using a conventional paraffin wax.

The cushion piece is preferably made of cotton, for example, absorbent cotton, because it has a suitable elasticity and is difficult to slip (Claim 2) . Chemical fibers such as polyethylene are slippery and have water repellency, so they do not fit well in moist mouths. Further, if the cushion piece is made spherical, if the occlusal deviation of the upper and lower jaw dentures is large, it is easy to escape when engaged. Therefore, it is preferable to form the absorbent cotton by rolling it in a roll shape and crushing it without making it spherical. By attaching a double-sided adhesive tape to the cushion piece in advance and peeling off the surface protective seal and sticking it on the artificial tooth surface, it takes less time to install (Claim 3) .

  In addition, although the wax denture used as the prototype is usually made in the process of manufacturing the denture, the check bite method according to the present invention can also be used for checking and adjusting the occlusal relationship of the wax denture.

Before describing the embodiment of the present invention, a preliminary experiment was conducted on a method using a hard occlusal tip, which will be described first. As shown in FIGS. 1 and 2, the occlusal tip 1 is formed in a disc shape with a hard material such as resin, and is attached so as to cover the vicinity of the left and right second premolar teeth 3a of the maxillary denture 2a. Several tips with a thickness of about 0.5 to 3 mm are prepared, and one with an appropriate thickness is selected according to whether the bite is good or bad.

  The chip 1 is attached by applying a resin or an adhesive 4 on one side. If a photopolymerization resin is used, it can be fixed by being irradiated with light after positioning, and the workability is good.

  The upper denture 2a to which the chip 1 is attached is mounted in the patient's oral cavity together with the lower denture 2b (FIG. 3). First, it is lightly occluded and it is confirmed that the artificial teeth are not in contact with each other except the tip 1. When the artificial teeth come into contact with each other, change to a thicker tip. Then, the recording surface (lower surface) of the chip is adjusted by adjusting so that both the left and right chips 1 are in contact with the opposing artificial teeth 3b evenly. The cut portion in FIG. Instead of grinding, it is also possible to adjust the left and right balance by adding a resin to the chip on the opposite side.

  Next, a tapping motion is performed by sandwiching an occlusion paper (not shown; similar to copying carbon paper) between the tip 1 and the artificial tooth 3b, and the occlusal adjustment of the early contact portion and the interference portion of the tip is carefully performed. When the occlusal position is correct, check that the marking points recorded on the surface of the chip through the occlusal paper converge to one point, and that the occlusal sound at this time can be clearly heard as a single click sound .

  When an appropriate mandibular position is obtained in this way, as shown in FIG. 4, the recording material 7 such as a silicone impression material for obtaining an occlusion or a quick hardening for impression is laterally inserted into the gap between the upper and lower jaw dentures while being in an occluded state Gypsum (xanthano) is injected and cured, and the mandibular position is recorded securely. In the figure, reference numeral 8 denotes a cartridge type silicone impression material injector. Three points, the left and right molar parts and the front tooth part, are sufficient as the places where the recording material 7 is injected.

  In this way, the upper and lower jaw dentures 2a and 2b are taken out of the oral cavity, occluded in the state recorded in the oral cavity, and reattached to the articulator (FIG. 5). Then, the chip | tip 1 which has adhere | attached is removed, the occlusion state of an artificial tooth is checked, and occlusion adjustment is performed. The occlusal adjustment is performed by shaving the portion of the artificial tooth that is in contact with the piece. When the occlusal deviation is so large that it cannot be adjusted only by partial cutting, the artificial teeth are removed and rearrangement is performed.

The problem found in the preliminary experiment described above is that the occlusal tip 1 needs to be adjusted to be in contact with the opposing artificial teeth after being attached to the denture, and this adjustment work takes a lot of time and effort. is there. In addition, it is difficult to position the chip at the time of mounting, and it takes time to mount and remove the chip from the artificial tooth using a resin or the like. Therefore, a simpler method will be described below as an example .

In this embodiment, a cushion piece 10 as shown in FIGS. 6 and 7 is attached to the upper denture 2a in place of the occlusal tip 1 described above. The attachment position is in the vicinity of the left and right second premolars 3a as in the preliminary experiment . The cushion piece 10 is a lump of absorbent cotton and is formed like a cushion or a pillow.

  The cushion piece is made so hard that the patient can feel the bite of the object while tapping. The thickness may be about 7-10mm, but prepare several types with different hardness. When the bite is bitten, the degree of crushing of the cushion piece differs depending on the hardness, so select and use an appropriate one according to whether the bite is good or bad.

  A double-sided adhesive tape 11 is stretched on one surface of the cushion piece, and the protective seal 12 covering the adhesive surface is peeled off and attached to the artificial tooth surface of the denture.

  The maxillary denture 2a attached with the cushion piece is mounted in the patient's oral cavity together with the mandibular denture 2b (FIG. 8). Next, as shown in the left half of FIG. 8, the patient bites the cushion piece 10. At this time, it is confirmed that the artificial teeth are not in contact interference other than the cushion piece. When contacting artificial teeth, replace them with harder ones.

  Thus, when it is confirmed that an appropriate lower jaw position can be obtained without contact interference between artificial teeth, the recording material 7 such as an occlusal acquisition silicone is inserted into the gap between the artificial teeth of the upper and lower jaws while the cushion piece is being bitten. Impression material or fast-setting gypsum for impression (xantano) is injected from the side and cured, and the occlusal position is recorded securely.

Next, the upper and lower jaw dentures 2a and 2b are taken out of the oral cavity, and after the cushion piece 10 is removed, it is reattached to the articulator 6 as shown in FIG. Thereafter, the recording material 7 is removed and the occlusal adjustment is performed as in the preliminary experiment .

It is a side view of the upper denture of the preliminary experiment using a hard bite tip . It is a bottom view of a maxillary denture similarly. Similarly it is sectional drawing at the time of occlusion of the upper and lower jaw dentures. It is a side view of the upper and lower jaw dentures in a state where the lower jaw position is recorded with a recording material. The state which attached the upper and lower jaw dentures to the articulator is shown. It is a side view of the upper denture of an Example. It is a bottom view of a maxillary denture similarly. Similarly it is sectional drawing at the time of occlusion of the upper and lower jaw dentures.

1 Occlusal Tip 2a Maxillary Denture 2b Mandibular Denture 3 Artificial Teeth 7 Recording Material 10 Occlusal Cushion Piece 11 Adhesive Tape

Claims (3)

The occlusal cushion piece is bitten by the left and right molar parts of the upper and lower jaw dentures installed in the oral cavity of the patient, and the occlusal position is recorded by injecting and hardening the recording material into the gap between the upper and lower jaw dentures while being bitten. A feature check bite method for dentures. The denture check bite method according to claim 1, wherein the cushion piece is made of absorbent cotton. The denture check bite method according to claim 1 or 2, wherein an occlusal cushion piece is affixed to the artificial tooth surface through an adhesive tape that is affixed in advance to the occlusal cushion piece .

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