Raising the Bar to Meet Demand For Implant-Supported Dentures
Posted Apr 11, 2012 in Technical
To meet the demand for implant-supported, removable full dentures among the rapidly growing aging population, Cendres+Métaux has redesigned the concept of an implant-supported bar system with its Stress Free Implant (SFI) Bar®. All the components are pre-fabricated so no casting, soldering, laser welding or milling are required, making the SFI Bar® advantageous over conventional bar systems.
Since November of 2006, over 4,000 SFI Bars® have been placed intraorally throughout Europe and Asia with a track record of zero remakes or complications. Recently, the first cases have been placed in the U.S. as well.
Based on Swiss technology, the SFI Bar® is designed for both jaws and ensures a stress-free hold of the prosthesis, enhancing stability and patient comfort. The bar is measured and precisely cut to size according to the distance between the implants. It's supported by ball joints that are adapted to the abutments, which in turn are attached to the implants. With the appropriate abutments, the SFI Bar® can be used with any implant situation.
Following is the technique for restoring an edentulous patient who was dissatisfied with the retention of the lower denture due to the shallow ridge. The treatment plan called for placing four implants and using the SFI Bar® System to improve retention, comfort and esthetics.
The SFI Bar® from Cendres+Métaux is pre-fabricated for use with two-implant and four-implant cases. Due to its prefabricated length, the farthest the implants can be placed from each other is 28mm; the closest recommended distance is 8mm. Although the SFI Bar® technique and procedure may be handled intraorally, assembling it on the model is recommended; it's less stressful for the patient who has just gone through the trauma of having implants inserted.
System components include:
• The Tube Bar is made of Type 5 titanium and is 20mm long. Load tests conducted at the University of Bonn in Germany show that a two-implant solution with anchoring the bar on two implants is able to safely withstand a load of 500N; a four-implant solution, with the bars following the alveolar ridge, can withstand a load of 1,500N (500N/bar). To read the complete scientific study, visit www.sfi-bar.com.
• Large Ball Joints support the tube bar between two implants. They also allow for an angulation forgiveness of 15° in either direction, meaning a total of 30° between two implants.
• Small Ball Joints support the two bars between three implants and have two stems. They're able to support a lateral angulation from 110° to 150°. Unlike the large ball joint, they're designed with a half-shell casing; like the large ball joint, they allow for an angulation forgiveness of 15° in either direction.
• Fixation Screw secures the ball joints to the implant adaptor and has an internal hex of 1.32mm and is 5.30mm in length.
• Implant Adaptor is specifically designed and shaped to adapt to the implant brand being used. It supports the ball joint that will be secured by the fixation screw that screws into the adaptor that will support the entire SFI Bar® to the implants.
All the components are available separately; this means more bars may be added to accommodate additional implants for the current case or that may be placed in the future.
For more information, call 888-554-5504 or visit www.cmsa.ch/dental
Frank Munzenmayer, CDT, Technical Education Manager at Cendres+Métaux USA, has an extensive background in dental technology. A graduate of the New York City College of Technology, he worked as a C&B technician for 10 years, managed Technical/Education Departments and has been a Technical Advisor for six major dental manufacturers.
I would like to thank the following for their contributions to this article: Dr. L. Keilig; Dr. K. Tibak; Dr. A. Aderset; Dr. M. Gruner; Dr. H. Stark; Dr. C. Bourauel; Dr. N. Enkling; Dr. S. Bayer, Department of Prosthetic Dentistry, Preclinical Education and Materials Science and CM Endowed Chair of Oral Technology, University of Bonn Germany; Professor Ludwig, University of Kiel; and Bernard Guggisberg, MDT, Cendres+Metaux, Switzerland.
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