OSG Corporation

OSG Corporation

The importance of cutting geometry in CAD/CAM milling machines.

No matter how precise the CAD/CAM burs used in dental milling machines may be – some details that are easily overlooked in daily use have significant impacts on the manufacturing of dental restorations. Have you ever wondered, for example, why a particular CAD/CAM bur has a longer or shorter lifespan than another? Or have you ever wondered why certain tools can only machine a certain number of dental restorations before they break? Well, these and other issues are related to various technical features of CAD/CAM burs, and although few people are aware of this, understanding the technical aspects of tools for the digital workflow and selecting the right tools can lead to an exponential increase in efficiency in the manufacturing of dental restorations. Furthermore, it helps you find CAD/CAM burs with a longer lifespan and thus reduce operating costs, as you need to replace them less frequently. In this article, you will learn how important the correct cutting geometry is for CAD/CAM burs in the manufacturing of dental prosthetics using digital workflows. Take a look! Due to the unique features of each component produced through dental milling, the cutting geometry of the bur becomes a decisive distinguishing characteristic for the end results; it is considered a decisive factor for the surface quality of the component and is essential for the longevity of the bur. The cutting geometry of the bur ensures highly precise milling of dental materials, provides surfaces suitable for the end product, minimizes rework and enables perfect Connection between parts that require an exact Connection. This requires qualified engineers and testing laboratories to ensure that a bur has the geometric features suitable for each type of dental material. OSG utilizes state-of-the-art equipment, such as robust and extremely precise 5-axis CNC machine tools, to create these highly precise geometries, with the aim of achieving a perfect milling result; these geometries were specifically designed to increase the strength and Power of the tool. During the dental milling process, the cutting tool removes chips (machined material) through rotary and feed movements, while the material shifts in linear and angular movements. A well-executed machining process includes the effective formation and removal of chips. To machine the material, the cutting edges of the bur have various wedge (cutting) and clearance angles that are designed and tested to ensure the best Performance between the material and the bur. To machine the material, the flutes of the bur are wedge-shaped; the wedge angle determines the breakage resistance of the bur. This means: the smaller the wedge angle, the less breakage resistant the bur, whereby this feature depends on the type of material being milled. Learn more about the key challenges in dental milling: High strength of the materials to be machined; Inconsistent interpretation of mathematical text leads to removal of large quantities of material; Difficulties in transporting chips from deep cavities; Long oscillation paths that generate vibrations; Narrow milling paths and tolerances; The optimal ratio between angles and clearance surfaces, which is used to define the cutting geometries, is crucial to overcome the above-mentioned challenges, increase the lifespan of the bur and ensure higher precision as well as better surface quality of the milled parts. The geometries of OSG's CAD/CAM burs ensure smooth cutting on important dental materials such as ceramic and zirconium oxide, thus enabling high-quality restorations such as crowns, veneers, onlays and inlays. 3 tips for minimizing tool breakage during dental milling? Observe the lifespan of the bur. The tool should be removed from the machine due to wear, never due to breakage, as this increases the risk of damage to the milling machine. Perform efficient planning in CAM to minimize collision risk and ensure that the bur path is as clear as possible for effective cutting. Ensure efficient cooling and make sure there is never a shortage of cooling fluid so that the bur retains as little heat as possible. OSG burs were developed for use at the highest cutting speeds on the leading milling machines on the market, and all burs were also manufactured according to the highest quality and precision standards, thereby ensuring compatible chucks for fast and precise tool changes in any milling machine system. Now that you have understood the importance of cutting geometry in CAD/CAM milling machines in the digital workflow, it is important that you apply this knowledge to decisions about purchasing new tools for your milling machine. Remember that by choosing the right tools, significant efficiency gains and cost savings can be achieved in the medium and long term – not to mention substantially more precise end results in dental procedures. OSG CAD-CAM burs are the perfect choice for precise milling with exceptional lifespan. Thanks to extensive research by our engineering team, we bring dental tools to the market that offer above-average Performance and allow you to mill more elements with higher precision, longer lifespan and the best value for money. So make the right choice when purchasing tools for your milling machine! Visit our online shop and discover our complete range of tools for the leading digital milling machines on the market!

Read more