The rough surface of denture restoration products cut hpp brackets after cutting will affect its fit with teeth and the comfort of patients wearing it, and achieving smooth processing requires starting from multiple links. First of all, grinding process is the basic means to improve surface roughness. Using special grinding tools, the hardness and particle size of the material are carefully selected, which can effectively remove the raised parts of the surface without damaging the bracket structure. During the grinding process, the grinding force and direction are flexibly adjusted according to the shape and roughness of different parts of the bracket, and the bracket surface is gradually made smooth through careful grinding.
Polishing treatment further improves the smoothness of the bracket surface. Different types of polishing materials are selected, such as polishing paste, polishing cloth wheel, etc. The polishing paste contains tiny abrasive particles, which can penetrate into the subtle depressions on the bracket surface and polish the uneven parts smooth through friction with the bracket surface. When using the polishing cloth wheel, the pressure and friction generated by high-speed rotation cause the material on the bracket surface to undergo plastic deformation, fill the depression, and thus form a smooth surface. At the same time, the polishing process can also form an extremely thin oxide film on the surface of the bracket, further improving the surface finish and wear resistance.
Chemical etching technology provides a unique method for bracket surface smoothing. The cut hpp brackets are immersed in a specific chemical etching solution. The chemical components in the solution will react chemically with the material on the bracket surface, selectively dissolving the raised and uneven parts of the surface. This method can penetrate into the microstructure of the bracket surface, repair minor defects, and make the surface more uniform and smooth. The chemical etching process requires strict control of etching time and solution concentration to ensure that the ideal smooth effect can be achieved without excessively corroding the bracket and affecting its strength and performance.
Sandblasting is also an effective way to achieve a smooth bracket surface. Fine sand particles are sprayed onto the surface of cut hpp brackets using high-pressure airflow. The impact force of the sand particles can remove impurities and uneven areas on the surface. The treatment effect can be precisely controlled by adjusting the sandblasting pressure, sand particle size, and spraying angle. Sandblasting can not only make the surface of the bracket smooth, but also increase the cleanliness of the surface, providing a better foundation for the subsequent coating or bonding operation. Moreover, the surface after sandblasting has a certain degree of roughness, which is conducive to improving the bonding force between the bracket and the adhesive in some cases.
Surface coating technology adds a smooth protective film to the surface of the bracket. Spray or apply a special coating material, such as ceramic coating, resin coating, etc., on the surface of cut hpp brackets. These coating materials have good fluidity and coverage, and can be evenly attached to the surface of the bracket, fill tiny depressions and gaps, and form a smooth and flat surface. At the same time, the coating can also give the bracket additional properties, such as anti-fouling and wear resistance, further improving the quality and service life of the bracket. The thickness and uniformity of the coating need to be precisely controlled to ensure that it will not affect the dimensional accuracy and use effect of the bracket.
Electrolytic polishing technology uses electrochemical principles to achieve smooth treatment of the bracket surface. The bracket is used as an anode and immersed in an electrolyte. Through electrolytic reaction, the metal or non-metallic material on the surface of the bracket is dissolved. During this process, the convex part dissolves faster than the concave part, so that the surface gradually becomes flat and smooth. Electrolytic polishing can achieve extremely high surface finish, and the treatment process is relatively gentle and will not cause mechanical damage to the bracket. By adjusting parameters such as the composition of the electrolyte, current density and electrolysis time, the polishing effect can be accurately controlled to meet different smoothness requirements.
Quality inspection and fine adjustment are the last links to ensure the smooth treatment effect of the bracket surface. Use precision testing instruments, such as microscopes and surface roughness meters, to carefully inspect the treated bracket surface. The microstructure of the bracket surface can be observed through a microscope to see if there are any residual defects; the surface roughness meter can accurately measure the surface roughness value to determine whether it meets the standard requirements. Once a problem is found, timely targeted re-treatment, such as local grinding, re-polishing, etc., until the bracket surface reaches the ideal smoothness, providing high-quality products for denture restoration.
