Dental micro-tensile strength testing device

Abstract

The invention discloses a dental micro-tensile strength testing device and belongs to the technical field of oral rehabilitation. The device comprises a clamp and a sample loading part. The clamp is divided into an upper clamp and a lower clamp which are completely the same in shape and structure; the upper clamp comprises a driven clamping handle, a clamp cross arm, a clamp side wall and a clampcantilever; the driven clamping handle is connected with the clamp cross arm to form an inverted T shape, the clamp side walls are symmetrically and perpendicularly connected to the two ends of the clamp cross arm, the clamp cantilevers are perpendicularly connected with the other ends of the clamp side walls, an opening is formed between the two clamp cantilevers, and concave parts are arranged on the inner sides of the clamp cantilevers, wherein the longitudinal section of the sample loading part is T-shaped, the sample loading part comprises a base and a hollow loading part, and a hole is formed in one end, far away from the base, of the loading part; the testing device is used for testing the bonding strength of the dental bonding material, the method is more scientific, the result ismore accurate, and more accurate reference can be provided for clinical operation.

Description

technical field [0001] The invention relates to the technical field of oral restoration, in particular to a dental micro-tensile strength testing device. Background technique [0002] Oral bonding technology plays a very important role in the field of dental treatment, and is widely used in the process of resin direct filling restoration or indirect restoration restoration of tooth and dentition defects. With the research and development of composite materials such as resin and ceramics, various types of resin and ceramic restoration materials are increasing, and product replacement is rapid. Due to the particularity of tooth tissue structure, it is more complicated to bond different restoration materials to teeth. Different types of materials involve different physical or chemical operation processes such as acid etching, sand blasting, silanization, infiltration, condensation reaction, etc., and there are many influencing factors. Different products, different manufacture...

AI Technical Summary

Problems solved by technology

In the traditional Ciucchi's fixture test scheme, only one surface of the sample is fixed on the surface of the fixture, and the degree of wrapping is low. The micro-tensile principal stress generated during the test is concentrated on the side of the fixed surface of the bonding interface, and the direction of the long axis of the sample Inconsistent, easy to form lateral shear force

The accuracy of the test results is not high, and the reference provided to the clinic is not good

[0006] In addition, there is also a method of making the test sample into a dumbbell-shaped or hourglass-shaped sample by changing the shape of the sample. However, in the process of preparing the test sample into an hourglass-shaped or dumbbell-shaped process, it is easy to damage the bonding interface, which also causes test results Inaccurate

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