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Steve Braykovich · January 20 at 1:57 am
How long does it take your mill to machine a (insert restoration type here)? This seems to be an area that the digital dental labs and milling centers are most concerned with and can likely be a...See more key criterion in their purchase of a milling machine. Of course machine cycle time is important but it is in reality, not a true gage of a milling machines production and effect on overall throughput and profitability. While the VersaMILL is capable of producing single unit zirconia restoration in as little as 6 minutes and titanium implant abutments in less than 20 minutes, our answer to this questions is typically: “How long do you want it to take”? This may, on the surface, appear to be a flippant answer but in reality we are quite serious. Often time sacrifices are made and indeed even tolerated in the pursuit of fast cycle times. Sacrifices that include: Decreased Cutting Tool Life Increased Manual Bench time Decreased Accuracy Inferior Surface Finish (i.e. Occlusal Surfaces) Poor Feature Definition (i.e. Margin Definition) Increased Design Time Does it make sense to be able to pull a restoration off of the milling machine in 4 minutes only to spend another 10 minutes on the bench to clean it up OR determine it is unacceptable thereby having to re-make it OR spend additional time designing the restoration to avoid machine issues OR spend additional money on expensive diamond tooling due to improper feed/speed rates, OR to sacrifice finish or detail, etc.? The achievement of high quality, in terms of work-piece dimensional accuracy, surface finish, production rate, wear on the cutting tools and economy of machining in terms of cost saving are the main challenges of modern dental manufacturing. Machine stability in terms of vibration dampening characteristics of the axes and spindle drive systems, spindle run-out, machine positional accuracy, cutting tool materials and geometry, machining parameters such as speed, feed, depth of cut and CAM programming strategies all play a factor in enabling you to reach your throughput and profitability objectives. We at Axsys not only have the PRODUCTS, we even more importantly, have the KNOWLEDGE and EXPERIENCE to maximize their effectiveness in pursuit of your goals and objectives. With our products we can provide you with the throughput you need to be competeitve while enabling you to ship superior product to your customers while yeilding high, predictable profits. You may even find that with the VersaMILL and our expertise, an extremely quick return on investment can be realized in zirconia restoration alone; thanks to the tooling cost savings associated with our extremely long tool life (in many cases over 200 units per tool) from tooling that costs a fraction of what competitive solutions offer. Contact Us today to learn more about the Axsys Advantage so we can put our experience to work for you.
Steve Braykovich · January 20 at 1:41 am
There are many interrelated factors that affect a DMC’s (Dental Milling Center) reliability, speed and accuracy, the three most important of which include the spindle drive system, machine control...See more system and axis drive system. The spindle drive system provides power to the cutting tool to remove material. The control (or machine operating system) is the brain of the DMC and coordinates machine motion. The axis drive system determines how smooth the motion of the DMC is and how it translate into parts that are consistently accurate with the required surface finish quality. SPINDLE DRIVE The amount of force and wear and tear that a DMC’s spindle must endure means the design of the spindle and the quality of the parts buried within the spindle is vital to the DMC’s spindle’s performance and its lifespan. Quality components not only determine longevity of the spindle, they determine how the spindle handles speed, torque and vibration. Key considerations include; style (belt or integral motor), bearings (type, lubrication and cooling), motor, shaft and housing Our VersaMILL addresses these considerations by utilizing a rigid, high quality and reliable precision spindle system that is also economical. The VersaMILL's high speed air cooled spindle can operate at high rpm while producing minimal run-out at the cutting tool edge allowing for long tool life and outstanding surface finishes; without the need for expensive tooling systems such as shrink-fit, polygonal clamping, micro collets and others. AXIS DRIVEThe quality of the axis drive system is also a function of the construction of the frame and the axes way system. This is the key area in the construction of a machine tool as it determines rigidity, vibration damping capacity, and resistance to side thrust. It's the balance between these three critical areas (power, speed, accuracy) that you must evaluate against your current and future needs to get the best buy for your money. Additionally the type of axis drive motor (servo or stepper) and motor control system (open-loop or closed-loop) is important to assure positional accuracy, repeatability, smoothness of motion, vibration, tool wear, quality of surface finish and quietness of operation. The VersaMILL’s closed-loop servo motor system is the system of choice in a quality DMC as it avoids the positional/repeatability accuracy, noise and maintenance issues associated with open-loop systems that rely on stepper motors to drive the machine axes. Most dental milling systems available today lack the rigidity of construction and fixturing, quality components, speed, versatility and size to effectively produce the various restoration types from the soft and hard materials that are required of them to maintain or grow their business. The VersaMILL 5X eliminates these issues by providing a single, cost-effective, compact and easy-to-use open platform high precision dental milling machine constructed from heavy duty, reliable components utilized in heavy idustrial applications that can be implemented in any lab environment. Take a look at the VersaMILL 5X for your next purchase of a dental machining center; it may well be the only machine you will ever need.
Tim Tyndall · February 15, 2012
For the last three years, I've been involved in titanium research and development with Precision Milling Center in West Valley City, UT, and read with interest Luke Kahng's recent article on titanium (How...See more to Fabricate an Esthetic Porcelain to Titanium Restoration, LMT November/December 2011, Click here to Read). The piece is well written and supported with excellent photography. However, I'd like to add some technique recommendations that are critical to the success of processing porcelain-fused-to-titanium restorations: When designing the framework, follow your manufacturer's instructions regarding minimal thickness, usually .4mm for anteriors and .6mm for posteriors. Metal preparations should always be done with SHP burs designed just for titanium. As Khang says, always cut in one direction and also use a maximum speed of 15,000rpm. Never use more than 2-2.5 bars or 30-35 psi of pressure when sandblasting titanium. Also, sandblast at a 45o angle and never use a particle size less than 120-150 microns of pure aluminum oxide abrasive. The article instructs you to blast the inside of the frame but first blast the outer surface prior to porcelain application; the inner surface of the abutments will be sandblasted after firing cycles to remove the oxide that forms internally. To clean the inside of the abutments, use a 50-micron-grit abrasive and blast at 2 bars or less of pressure; a larger grit size can damage the margins. After sandblasting, bench set the titanium frame for 5-10 minutes (not to exceed 30 minutes) to undergo the passivation process. This step is critical to the success of bonding to titanium; during this time, titanium naturally develops a very fine oxide layer that prevents corrosion and is the contributing factor for biocompatibility of the material. Failure to implement this step will lead to failure of the restoration. Avoid ultrasonic cleaning after sandblasting; steam cleaning is recommended by most manufacturers. GC recommends that its GC Initial Porcelain Ti™ Bonder be applied in a thin enough layer that the coping shines through. When applying the bonder, brush out pooling and thick streaks of the bonder for a thin, uniform coating. Properly fired bonder surfaceis dark and has a slightly shiny appearance; gray patches of fired bonder indicate the use of too much bonder. GC also recommends that the first layer of opaque is applied as a very thin wash on the Ti Bonder treated surface; apply additional layers as needed along with appropriate modifiers. Complete the porcelain buildup, finish contours, set occlusion and glaze. When polishing and cleaning titanium after the glaze, use polish wheels and high-shine compounds specifically designed for titanium. Polish the exposed titanium finish lines, wait 10 minutes for the passivation process to occur, then steam clean the restoration. This passivation process seals the surface of the titanium and prevents corrosion that would discolor the metal later.
Laboratories—most notably Glidewell Laboratories—have long dabbled in the manufacturer/supplier realm. But in the past 15 years, digital technology has been driving a role reversal as manufacturers/suppliers...See more have begun stepping into the laboratory’s shoes. Nobel Biocare was the first in the late 90s; now, there are more than a dozen manufacturer/suppliers that offer design and milling services for their laboratory customers. While some laboratory owners are concerned their suppliers are becoming their competitors, others aren’t bothered by the trend if the manufacturers aren’t serving dentists directly; they see it as one more way to obtain outsourced restorations and round out their product offerings. Visit LMTmag.com tomorrow for another LMT Memorable Moment.
After years of speculation, CAD/CAM came to fruition in the dental laboratory in 1998 with the official U.S. launch of the Procera® AllCeram Crown, featuring an aluminum oxide coping milled at Nobel...See more Biocare’s production facility in Sweden. The success of Procera—and the introduction of a dozen new in-lab milling systems in the early 2000s—fueled intense interest among laboratory owners and made CAD/CAM the hot topic for the unforeseeable future. The automated manufacturing process afforded an efficient, consistent method of production and also opened the door to using zirconia, the strongest material on the market for all-ceramic restorations; other material options, depending on the system, included aluminum oxide, lithium disilicate, composite, gold, non-precious alloys, reinforced ceramic-based materials and titanium. As the number of systems on the market multiplied, laboratory owners who wanted to get on board grappled with purchasing decisions. Some opted to outsource, but many have made the investment; LMT’s 2013 Digital Technology survey found that 55% of full service and C&B laboratories have some type of digital equipment in-house. The extent to which CAD/CAM has revolutionized our industry in such a short time is inarguable. In just 10 years, the percentage of CAD/CAM-milled restorations fabricated by labs has increased tenfold: according to LMT’s surveys, in 2003, CAD/CAM restorations were only 4% of the total C&B workload; they now make up 41%. Visit LMTmag.com tomorrow for another LMT Memorable Moment.
In its infancy, laboratory owners didn’t immediately see the internet’s application to their business. However, in the past 15 years, the number of laboratories with internet access has tripled,...See more with 88% of U.S. laboratories LMT surveyed now having online capability. The ability to transmit data over the internet is fueling the growth of milling centers and subcontracting businesses. Emailing questions, case considerations and photos with clients has become the norm. And the opportunity for far-reaching promotion has prompted more than 40% of laboratories to market their nother third to use social media to network with clients. Visit LMTmag.com tomorrow for another LMT Memorable Moment.
October 1986, IECDT, New York City: Crowds of technicians attended Dr. Francois Duret’s lecture during which he demonstrated his chairside CAD/CAM system for the first time in the U.S. Based on micro-milling...See more technology used to make titanium microchips for computers and missile parts, the system featured a laser scanner and milling machine that could fabricate crowns, inlays, onlays and up to three-unit bridges out of Dicor® material. Touted as the system that “has the potential to change the way dentistry is done as we know it,” some attendees were concerned that chairside CAD/CAM would render laboratories obsolete and that an entire generation of technicians would lose their jobs. On the flip side, other laboratory owners saw the potential of the technology and the positive changes that might occur as a result. For instance, the late Al Sabella, MDT, Sabella Dental Studios, Hartdale, NY, said, “In the future, dental technicians will have to become familiar with engineering principles and computer readouts. This kind of technology won’t eliminate the end product, just our means of getting to it. When you measure what used to be available to us as consumers against what’s now available—such as VCRs, compact discs, the Concorde, etc.—it’s obvious that this scanner is an example of what our future looks like.” Visit LMTmag.com tomorrow for another LMT Memorable Moment.
Axsys Dental Solutions introduces a 4-axis version of the VersaMILL Dental Machining Center for in-house fabrication of dental prostheses. Equipped with the precision and high performance components...See more of the VersaMILL. 5X 5-axis mill, the VersaMILL4X is self-contained and rigid with far greater options than current four-axis machines. The VersaMILL 4X has wet/dry milling capabilities for material appropriate processing, intelligent four-axis machining that reaches into undercuts and the ability to handle a broad range of indications including custom/hybrid abutments and dental bars. The VersaMILL’s superior construction enable it to machine a wide range of materials including zirconia, titanium, chrome cobalt, resin, wax, glass-ceramics, lithium disilicate and more. The new VersaMILL 4X is also compatible with any open CAD/SCAN solutions providing the flexibility to seamlessly process all imported or modified design files. For more information about the VersaMILL 4X or VersaMILL 5X 5-axis mill contact an Axsys Dental Solutions representative at 1-855-687-7941 or visit our Web-site at: www.axsysdental.com Axsys Dental Solutions 29627 West Tech Drive Wixom, MI 48393 www.axsysdental.com email@example.com 1.855.687.7941
D&S Group, Inc. of Waunakee, WI recently welcomed the experienced Hootman Dental Laboratory of Rockford, IL as its newest laboratory facility. Serving the dental community of northern Illinois and...See more southern Wisconsin since 1927, Hootman Dental Laboratory brings tremendous history, tradition and experience to the D&S Group. The Rockford based laboratory will serve as D&S’s southerly hub for improved presence in southern Wisconsin and northern Illinois. Travis Zick, President of D&S Dental Group, Inc., said “This partnership allows us to expand into a new market and team up with some great people. We’re excited about bringing our philosophy of service, education, and quality craftsmanship—backed by competitive pricing—to the northern Illinois arena.” While Hootman’s experience and locale will improve D&S’s Midwestern presence, D&S’s command of the newest and most efficient dental technologies will boost the Illinois lab’s technological capacities and product selection. Digital impression scans, digital design, CAD/CAM milling services, immediate access to the latest materials and products, and additional technological resources will now be offered on Hootman’s list of services. “The collaboration will both enhance and expand upon our current product offerings to meet the needs and exceed the expectations of both existing and potential clients,” said Debra Swenson, President of Hootman Dental Laboratory. “With new state-of-the-art technology, affordable pricing, additional continuing education opportunities, and an expanded well of expertise and knowledge to draw from, Hootman will continue to be the best laboratory choice for area dental professionals.” For more about D&S Group, Inc., including products and services offered, visit dnsdental.com.
Amann Girrbach America launches an entry level version of the Ceramill Motion 2 mill for in-house fabrication. Equipped with the precision and high performance components of the original Motion 2 five-axis...See more mill, this entry level four-axis Motion 2 is compact and versatile with far greater options than current four-axis machines. The four-axis Motion 2 has wet/dry milling and wet grinding capabilities for material appropriate processing, intelligent four-axis machining that reaches into undercuts, the ability to handle a broad range of indications and materials including zirconia, Sintron® millable chrome cobalt, resin, wax, glass-ceramics and lithium disilicate. The new four-axis Motion 2 is also compatible with any open scanning equipment providing the flexibility to seamlessly process all imported or modified .stl files. For more information about the Motion 2 four-axis or Motion 2 five-axis mill contact an Amann Girrbach America representative at 1-800-851-3719 or visit www.AmannGirrbachAmerica.com. To register for a demonstration in your area, visit www.CeramillLiveEvents.com. Amann Girrbach America, Inc. 5265 Parkway Plaza Blvd. Charlotte, NC 28217 www.AmannGirrbachAmerica.com info@AmannGirrbachAmerica.com 1.800.851.3719
Whip Mix is proud to offer milling services for dental laboratories. Whether laboratories are in need of back-up milling or are building their digital workflow, Whip Mix Milling Services guarantees support...See more when they need it, providing a 3-day turnaround time on all restorations. Offering full contour crowns, substructures, wax patterns and custom hybrid abutments, all restorations are milled using Vericore Milling Discs and the Roland DWX-50 milling machine. Whip Mix has a highly trained team of expert professionals that will work with laboratories to guarantee they receive consistent and predictable quality with every restoration. For more information on Whip Mix Milling Services, visit www.whipmix.com or call Margaret Overmeer at 800-626-5651 x1228.