Manufacturing method of improved individual tray capable of preventing isolated abutment tooth from being broken and demolding method thereof

Abstract

The invention discloses a manufacturing method of an improved individual tray capable of preventing isolated abutment tooth from being broken. The manufacturing method comprises the following specific steps: selecting a model; covering the model with a wax sheet; marking the highest point of the isolated abutment tooth; baking the wax sheet to be soft, pressing the wax sheet on the wax sheet along an arc line, and drawing a marking line after the wax sheet is hardened; coating paraffin oil, covering the wax sheet with the light-cured resin forming sheet, and punching small holes along the marking lines; punching two holes in the center of the lip side of the isolated abutment; forming a small hole in the position outside the isolated abutment tooth marking line; manufacturing handles to form individual trays; and baking by using a light curing machine, and polishing the edge to be smooth to obtain the improved individual tray. On the basis of the improved individual tray, the demolding method comprises the following steps: preparing a final impression by using an alginate impression material; pouring the final printing mold, demolding, pinching off the light-cured resin forming sheet between the holes along the marking line, and separating the tray at the abutment tooth; and obtaining a final model. The manufacturing process is simple, the cost is saved, and the operability is higher.

Description

technical field [0001] The invention belongs to the technical field of denture production, and in particular relates to an improved individual tray production and demoulding method for preventing isolated abutment teeth from breaking. Background technique [0002] When there are isolated abutments on the model, or the teeth are twisted, tilted, have undercuts, or the direction of the insertion path is inconsistent, etc., the isolated abutments are prone to fracture during demolding. Due to the hardness of the surface of anhydrite, tooth breakage often occurs when impressions are made and released in clinical work. [0003] The production of individual trays is still a key step in the production of removable dentures. The significance of individual tray production is to transfer the teeth and mucous membranes in the patient's mouth to the model by making a tray that accurately matches the patient's oral condition, forming a final fine model and then making it on the model. D...

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Problems solved by technology

[0009] 1. When there is a broken tooth on the model, use 502 glue to re-glue it along the broken position. The disadvantages of this method are: ①. The position and direction of the re-glued are not necessarily consistent with the original model; ②. If the tooth is broken And when the damage is incomplete, the teeth will no longer be bonded to the model; ③, the bonding with 502 glue is not firm, there is a possibility of breaking again, and there is a possibility of tooth loss

[0010] 2. Place a toothpick or steel wire on the isolated abutment when pouring the final impression to improve the resistance of the isolated abutment during demoulding. The disadvantages of this method are: ①. It is not easy to determine the position and direction of the toothpick or steel wire. If the toothpick Or the poor placement of the steel wire will still lead to the fracture of the isolated abutment; ② Even if the placement is accurate, the abutment will still break during demoulding, and the broken tooth may not be reset due to the presence of toothpicks or steel wires during the reset

[0011] 3. There are several disadvantages in the improved production method of individual trays reported in foreign literature: ①. Using silicone rubber materials as marking lines is not only time-consuming, but also relatively expensive, and it is not easy to stick with wax, resulting in easy marking lines. There is a deviation, which affects the cutting position during demoulding; ②, when separating the tray, use a fast machine to cut and separate, which is not only time-consuming, but also inconvenient for the mold maker.

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