WO2022150027A2

WO2022150027A2 - Adjustable new generation bonding strength sample preparation and shearing ing test apparatus

Info

Publication number: WO2022150027A2
Application number: PCT/TR2022/050004
Authority: WO
Inventors: Canan AKAY; Emre MUMCU
Original assignee: Eskisehir Osmangazi Universitesi
Priority date: 2021-01-05
Filing date: 2022-01-04
Publication date: 2022-07-14
Also published as: WO2022150027A3; TR202100083A1

Abstract

This invention relates to the adjustable new generation bond strength sample preparation and shearing test apparatus, which enables the preparation of the test sample used in the measurement of the material's resistance to rupture and fracture as a result of parallel application of the constant load to the material surface in shearing tests, and it has the following components: a body (1), upper fixing disc (2) fixed to the upper part of the body (1), fixed to the lower part of the body (1), lower support disc (3) with screw thread (3.1) in its hole in the middle, screw (6) associated with the screw thread (3.1), at least one protrusion (4.1) and the male mold (4) formed from the male mold hole (4.2) and at least one slot (5.1) and female mold (5) formed from female mold hole (5-2).

Description

ADJUSTABLE NEW GENERATION BONDING STRENGTH SAMPLE PREPARATION AND SHEARING ING TEST APPARATUS

Technological Field:

This invention relates to the adjustable new generation bonding strength sample preparation and shearing ing test apparatus, which enables the preparation of the test sample used in shearing tests, as a result of the parallel application of the constant load to the material surface, to measure the resistance of the material against rupture and breakage.

Prior Art:

Shearing tests are performed to measure the ability of the material to resist breaking under a constant load, usually applied parallel to the surface of the material. The purpose of this test is to compare the performance of the adhesive in a joint and determine its mechanical response. Adhesion of dental materials with each other or with dental tissues has an important place in the success of dentistry. It is frequently used to determine the adhesion strength and reliability of the dental material to be used.

In the field of dentistry, dental materials are used in many departments such as Prosthetic Dentistry, Restorative Dentistry, Pedodontics, Orthodontics, Endodontics. The importance of new generation adhesive dental materials is very important in the long-term success of dentistry and in terms of removal of less healthy tissue and preventive dentistry. With the transfer of computer-aided production and rapidly developing technologies in other fields to dentistry, new dental materials are being introduced to the market at a rapid pace. Our invention proposal will be used to prepare samples in a way that will minimize the margin of error and standardized in shearing bond strength testing to be performed on dental materials. Test methods for evaluating the bonding strength of new materials are limited. Among the test methods, the most preferred test method in terms of ease of application, clarity, reproducibility, comparison and cost: shearing ing bond strength tests.

In the patent application numbered "US6308579B1", "Apparatus and methods for creating adhesion strength" are described. The present invention describes apparatus and methods for forming an adhesive and affixing the adhesive to a test piece. To create a cylindrically shaped adhesive that bonds to the test piece, a bonding and molding platform delimits the bond region to a specific area on the test piece. The bonding and molding platform forms a substantially cylindrical adhesive that is substantially perpendicular to the substrate.

The video at the link"https://www.youtube.com/watch?v=2L00v2r7CwQ#action=share" shows the implementation of the mechanism of the above application.

There are many difficulties and disadvantages during the application of the sample preparation apparatus for the shearing test used above. During the preparation of the test sample, while the material on the block is subjected to the polymerization process with the LED beam, the polymerization is not homogeneous, since the jig piece on the block does not transmit light. The light transmittance of the current jig is limited. Since it is not in a transparent structure, the air spaces remaining in the material cannot be eliminated and cannot be controlled. This will cause the sample not to be able to give realistic results during testing. In addition, after the polymerization process, the axial force applied during the removal of the sample affects the bond strength. Before the shearing test, the existing jig is separated from the test sample, while the connection between the two materials is damaged.

As a consequence, there is a need for a new technology that can overcome the disadvantages mentioned above. Description of the Invention:

One of the advantages of our system, which is the subject of the invention, is that our sample preparation device does not harm the test sample in any way. After the polymerization process of the test sample is completed, the molds are separated from each other in parallel (radial) with respect to the test sample. In the current method, this happens axially (perpendicularly) to the sample. In this way, the material on the test sample and the block on which the material is positioned are not damaged in any way. This increases the sensitivity life of the mold, thus enabling the mold to be used on more samples.

Another advantage of our system, which is the subject of the invention, is that the mold material is made of transparent material. By allowing the LED beam to reach the material in all directions during the polymerization process, the polymerization process is carried out smoothly and homogeneously. In addition, the experimenter will be able to control the polymerization result without disturbing the experimental setup, and the air gaps will be eliminated by seeing.

The simple and useful structure of the parts that make up our system, which is the subject of the invention, reduces the costs. Furthermore, the fact that these parts can be easily mounted to each other makes the work of the personnel much easier. The interlocking mounting of the molds considerably shortens the processing time during the preparation of the test sample and lays the groundwork for the preparation of a large number of test samples.

Explanation of the Figures:

The invention will be described with reference to the accompanying figures, so that the features of the invention will be more clearly understood and appreciated, but the purpose of this is not to limit the invention to these specific regulations. On the contrary, it is intended to cover all alternatives, changes and equivalences that can be included in the area of the invention defined by the accompanying claims. The details shown should be understood that they are shown only for the purpose of describing the preferred embodiments of the present invention and are presented in order to provide the most useful and easily understandable description of both the shaping of methods and the rules and conceptual features of the invention. In these drawings;

Figure 1 is the perspective view of the currently used system.

Figure 2 is the general perspective view of the system which is the subject of the invention.

Figure 3 is the perspective view of part A. Figure 4 is the perspective view of the male and female mold.

Figure 5 is the perspective view of the male and female mold.

Figure 6 is the perspective view of the upper fixing disc.

Figure 7 is the perspective view of part B.

Figure 8 is the perspective view of the lower support disc. Figure 9 is the perspective view of the test sample.

The figures to help understand the present invention are numbered as indicated in the attached image and are given below along with their names. Explanation of the References:

1 Body

2 Upper fixing disc

2 1 Channel

2 2 Flank

3. Lower support disc 3.1. Screw Thread

4. Male mold

4.1. Protrusion

4.2. Male mold hole

5. Female mold 5.1. Housing 5.2. Female mold hole

6 Screw

7. Current setup

8 Current jig 9. Current clamping apparatus

10 Test sample

10.1. Test block

10.2. Material Description of the Invention:

The elements constituting the invention are a body (1), the upper fixing disc (2) fixed to the upper part of the body (1), the lower support disc (3) fixed to the lower part of the body (1), containing a screw thread (3.1) in its hole in the middle, screw The screw (6) associated with the female (3.1), the male mold (4) consisting of at least one protrusion (4.1) and the male mold hole (4.2), and the female mold (4) consisting of at least one socket (5.1) and the female mold hole (5.2) to the mold (5).

The male mold (4) mentioned in the invention contains the projection (4.1) associated with the female mold hole (5.2) on the female mold (5). The invention includes male mold (4) and female mold (5) which exert radial force on the material (10.2). In the invention, there is a screw (6) that ensures that the test sample (10) is compressed on the body (1) by applying force to the lower part. The upper fixing disc (2) mentioned in the invention has a circularly opened channel (2.1) on its lower surface. The channel (2.1) in the invention has a curve (radius). The upper fixing disc (2) mentioned in the invention contains a flank (2.2) that exerts a pressing force on the outer walls of the male mold (4) and female molds (5). The invention has male mold (4) and female mold (5) made of transparent (light-permeable) material. Detailed Description of the Invention:

The parts constituting the invention are basically; body (1), upper fixing disc (2), lower support disc (3), male mold (4), female mold (5) and screw (6). Upper fixation disc (2); channel (2.1) and flank (2.2.) parts. The lower support disc (3) contains the screw thread (3.1), which is the only part. Male mold (4) consists of protrusion (4.1) and male mold hole (4.2). The female mold (5) consists of the slot (5.1) and the female mold hole (5.2).

In the system that is the subject of the invention, there is an upper fixing disc (2) on the upper part of the body (1) and a lower support disc (3) on the lower part. The screw (6) is associated with the screw thread (3.1) in the hole of the lower support disc (3) and makes vertical movement. The male mold (4) and the female mold (5) can be clamped to each other by the protrusion (4.1) and the slot (5.1). As a result of clamping, the semicircular male mold hole (4.2) and the female mold hole (5.2) form a full circle hole (Figure - 2, Figure - 3, Figure - 4, Figure - 5, Figure - 6, Figure - 7, Figure - 8).

The mechanism of the system used today is shown in Figure-1. The existing assembly (7) is first loosened by the existing tightening apparatus (9). The test block (10.1) is placed under the existing jig (8). Then, the distance of the existing assembly (7) is adjusted by the clamping apparatus (9). One of the materials (10.2) (composite, resin cement...) is poured from the middle hole part of the existing jig (8) and then it is subjected to the polymerization process together with the LED beam. The clamping apparatus (9) is loosened again and the test sample (10), which is the combination of the test block (10.1) and the material (10.2), is made ready for the test.

The working principle of our system, which is the subject of the invention, is as follows; The test block (10.1) is placed on the screw (6). The male mold (4) and the female mold (5) are placed on the test block (10.1) and the distance between the molds is adjusted according to the size of the material (10.2) to be tested. Then, the screw (6) at the bottom is slightly tightened so as not to damage the test block (10.1) to a certain extent. The polymerization process is started. Then, the male mold (4) and the female mold (5) are separated in the radial direction and removed from the body (1) without damaging the test block (10.1) and the material (10.2) to be tested for adhesion strength. The test sample (10) is made ready for testing (Figure - 2, Figure - 9).

Claims

1- The invention relates to the adjustable new generation bond strength sample preparation and shearing test apparatus characterized in that It comprises;

- a body (1),

- upper fixing disc (2) fixed to the upper part of the body (1),

- lower support disc (3) with screw thread (3.1) in its hole in the middle, fixed to the lower part of the body (1),

- screw (6) associated with screw thread (3.1),

- a male mold (4) consisting of at least one protrusion (4.1) and a male mold hole (4.2),

- having a female mold (5) consisting of at least one slot (5.1) and female mold hole (5.2).

2- It is the male mold (4) mentioned in Claim 1, and characterized in that It comprises; It is characterized by having a projection (4.1) associated with the female mold hole (5.2) on the female mold (5).

3- It is an adjustable new generation bond strength sample preparation and shearing test apparatus mentioned in Claim 1, It is characterized in that It comprises; a male mold (4) and a female mold (5) applying radial force to the material (10.2).

4- It is an adjustable new generation bond strength sample preparation and shearing test apparatus mentioned in Claim 1, It is characterized in that It comprises; a screw (6) that ensures that the test sample (10) is compressed on the body (1) by applying force to the lower part.

5- It is the upper fixing disc (2) mentioned in Claim 1, It is characterized in that It comprises; a circularly opened channel (2.1) on its lower surface.

6- It is the channel (2.1) mentioned in Claim 5, It is characterized in that It comprises; a curvature (radius). 7- It is the upper fixing disc (2) mentioned in Claim 1, It is characterized in that It comprises; a flank (2.2) that exerts a pressing force on the outer walls of the male mold (4) and female molds (5).

8- It is an adjustable new generation bond strength sample preparation and shearing test apparatus mentioned in Claim 1, It is characterized in that It comprises; a male mold (4) and a female mold (5) made of transparent (light-permeable) material.