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Consideration on the necessity of custom abutment processing through one-step method.

Explore the necessity of custom abutment processing through the one-step method. Gain insights into efficiency, accuracy, and patient outcomes in dental implant procedures.

Selection of Milling Machine

The operation of Dental Milling Machine can be divided into Horizontal and Vertical methods depending on the position of the spinning tools. In the Horizontal method, chip discharge is easily disperse and stroke is reduced, resulting in excellent precision. Manufacturers prefer Vertical method as its easier to design and produce. In milling, the amplitude of the spinning tools is very crucial. To understand this, we used an indicator to measure the settings and vibrations of the machine. If these elements are not accurately set, the surface of the cut material may not be smooth, and there is a high chance of chipping during the process. The results showed that while a typical milling machine has a tolerance of 1/100, CRAFT SX had a tolerance of 1/1000, and effectively suppressed vibrations to avoid tolerances of 3/1000 or higher.

Completely New Abutment Production with One-Step Milling

While conventional custom abutment production goes through complex stages of designing, milling, and abutment scanning. One-step milling reduces the production stages by milling the abutment and the suprastructure simultaneously thus saving you time. It also improves the accuracy by preventing errors that may occur during abutment scanning process.

With increasing adoption of digital workflow, one-step milling tolerance of high precision and accuracy should be adhere with D-cut standards. Therefore, selection of milling machines and abutment accessories adhering to the standard is important to achieve satisfactory results with one-step milling method and model-free prosthetics.

Research on the efficiency and accuracy that can be achieved when processing glass ceramics underwater

A New Way to Mill Glass Ceramics

To mill the ceramic surface, rotating at high speed may generate heat stress since remaining heat energy in the material is large tand the heat stress causes microcracks. In order to mill the cramic effectively control the heat energy when mill the ceramic, water and it is designed to be assemble in the CRAFT machine as to not interfere with the movement of the axis. Therefore, submerged bucket allows stable processing of sensitive materials.

Temperature Control of Milling Material

During milling, a lot of heat is generated due to friction between the tool and materia. The heat causes many problems. Processing in the coolant has a superior effect on temperature control than the conventional method such asspraying coolant only.

Improvement of Material Stability

Above a critical point, the material fractures or deforms. More serious problem is microcrack because it cannot be well observed with the naked eye. It becomes a fundamental cause of lifetime shortening of the prosthesis. For this reason, it is very important to control the physical stress applied to the material. Submerged bucket effectively prevents overheating of material. The method of spraying the coolant is very vulnerable to ceramic processing because it can only control the locally generated heat of the material. On the other hand, submerged processing is advantageous for ceramic processing as it can control the heat generated on all surfaces of the material.

Improvement of Tool Life

One of the main effects of coolant sprayed during milling is to reduce tool wear. If frictional force is greater than the limit value is transmitted to the tool, the tool wears rapidly and it breaks eventually. Frictional force can be controlled by coolant. However, spraying of coolant is very vulnerable to reduce friction, especially in the work of making holes in the material by drilling. This can be easily understood by looking at the shape of the prosthesis. It enters like making a hole under the margin, and if it is difficult to supply an appropriate amount of coolant at this time, the frictional force easily increases, leading to tool breakage.

It is particularly advantageous for prosthesis if underwater milling is conducted with submerged bucket. Because coolant is supplied constantly to the processing area. It has been confirmed that tool life increased more than 30% by submerged milling.

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