Dental restoration special curved surface laser welding method

Abstract

The present invention relates to a dental prosthesis heterotypic curved surface laser welding method. Said method includes the following steps: in the middle position of dental prosthesis heterotypic curved surface to be trimmed using sand disk to longitudinally cut a long seam whose width is about 1mm and divide the dental prosthesis heterotypic curved surface into two portions; placing the dental prosthesis heterotype curved surface separated into two portions into a dental model, and they are clamped on a special-purpose welding device together; firstly, using a welding wire, placing the welding wire along the long seam, welding said welding wire in one side of said long seam; equally, using another identical welding wire and parallelly welding said welding wire in the side surface of above-mentioned welding wire until the residual long seam width is equal to or less than 0.2mm; between longitudinally-spaced two points of said long seam respectively using welding wire and adopting spot welding process to make connection, finally, in the residual portions of said long seam using welding wire to make filler welding wire welding.

Description

technical field [0001] The invention relates to a laser welding method for a special-shaped curved surface of a dental prosthesis; more specifically, it refers to a laser welding method for cutting two parts of a special-shaped curved surface of a dental prosthesis. Background technique [0002] The traditional dental casting technology is a special-shaped surface of the overall dental restoration. Although it can solve the problem of forming the complex shape of the human oral cavity, due to the physical changes of the metal in the casting process, defects of bridges and continuous crowns often occur during the casting process. , tilting, deformation, etc., directly affect the positioning of fixed dentures or removable dentures, and cause damage to the patient's teeth and periodontium. Usually, these defects rely on manual trimming, but manual trimming will produce new invisible stress deformation and cracks, which will bring dangerous hidden dangers to patients. Especiall...

AI Technical Summary

Problems solved by technology

[0002] The traditional dental casting technology is a special-shaped surface of the overall dental restoration. Although it can solve the problem of forming the complex shape of the human oral cavity, due to the physical changes of the metal in the casting process, defects of bridges and continuous crowns often occur during the casting process. , tilting, deformation, etc., directly affect the positioning of fixed dentures or removable dentures, and cause damage to the patient's teeth and periodontium

Usually, these defects rely on manual trimming, but manual trimming will produce new invisible stress deformation and cracks, which will bring dangerous hidden dangers to patients. Especially precious metals, such as gold, silver, etc.) waste of materials

[0003] In recent years, the special-shaped surface of dental restorations has been divided into two parts, and then welded into a whole with laser symmetry, which has solved the problem of longitudinal (Y-axis) warping deformation. However, due to the process of melting → solidification of the metal, Volume shrinkage will occur. During symmetrical welding, this shrinkage will run through the entire working process. When one side of the weldment absorbs a certain amount of laser pulse energy, the shrinkage of the metal will make one end of the weldment take the weld as the The axially welded surface is lifted. During the process of melting → solidification, the metal will shrink in volume. In symmetrical welding, this shrinkage will run through the entire working process. When one surface of the weldment absorbs a certain amount of laser pulse energy When the metal shrinks, one end of the weldment will lift up the welded surface with the weld seam as the axial direction.

Therefore, symmetrical welding cannot solve the transverse (X-axis) shrinkage deformation caused by welding of super-long curved surfaces and complex curved surfaces; moreover, when the thickness exceeds 1.5mm, it is difficult to connect the heat-affected zones of the upper and lower solder joints, which is prone to virtual welding

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