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- Michael Gurney, DDS
- Franklin Parada, RDT
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Kelly Fessel Carr wrote an article
>When Aaron Hoffman, Troy Gooden and Eric Gooden, Co-Owners of Sunflower Dental Studio in Topeka, KS, first saw the impressions for a 20-implant reconstruction, they thought it looked like something from...
Frank Munzenmayer, CDT wrote an article
Frank Munzenmayer, CDT, explains how to fabricate an overdenture implant bar without soldering, casting,...(more)
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...
According to LMT’s 2012 Fee Survey, laboratory owners are making adjustments to their fee structures to be more competitive. For example, 48% now offer volume discounts, up 18% in just four years.
LMT Original Research © 2010 - 2013
Frank Munzenmayer, CDT, explains how to fabricate an overdenture implant bar without soldering, casting, laser welding or milling using the pre-fabricated SFI Bar from Cendres+Métaux.
>When Aaron Hoffman, Troy Gooden and Eric Gooden, Co-Owners of Sunflower Dental Studio in Topeka, KS, first saw the impressions for a 20-implant reconstruction, they thought it looked like something from...See more a sci-fi movie. It was the largest case Hoffman had ever had the opportunity to work on during his 19-year career as a ceramist, and he couldn't wait to get started. ###1 } The Restorative Challenge The 80-year-old patient had tremendous decay and bruxing problems and the prognosis of his natural dentition was "hopeless," says his dentist, Dr. Guy Gross, New Horizons Dental Care, Salina, KS. Dr. Gross removed all of the patient's teeth and restored him with a complete set of dentures. However, the patient had a severe gag reflex, couldn't tolerate the dentures and after a few months said, "If you can rebuild my mouth with restorations that function like real teeth and no removable prosthesis, that's what I want." Dr. Gross explained the various restorative options and price points. The patient opted for the treatment plan he felt would most closely mimic his natural teeth—an implant-supported prosthesis with a total of 20 implants—and fortunately, had sufficent financial resources. Since he was concerned about hygiene and food traps, he wanted as many single units as possible so he could brush and floss easily. In addition, Dr. Gross and the laboratory discussed the fact that this approach would facilitate replacing any units that might possibly fail in the future. ###2 } Implant Placement Dr. Gross had the patient's denture duplicated in clear acrylic with pilot holes and used it for the surgical stent. He placed all the implants in one appointment, took impressions and sent them to the laboratory. "When we received the impressions, I was overwhelmed by the challenge but also incredibly excited by the prospect of doing that amount of porcelain work," explains Aaron Hoffman, Co-Owner and Ceramist, Sunflower Dental Studio, Topeka, KS. The lab poured the models and made acrylic temporaries that the patient wore for about two months. Then the healing caps were removed and temporary bridges were placed. Four months later, Dr. Gross placed the abutments and sent the impressions and bite registration to the laboratory. ###3 } Fabrication Process After the copings were waxed up, cast in Ceradium V, a non-precious alloy from Matech, and tried in the patient's mouth, Hoffman went to work fabricating three-unit bridges for #5-7 and #20-22 and 15 porcelain-fused-to-non precious crowns using the VITA® VMK Master System. It took him two 14-hour days to complete all the restorations; he completed all the buildups on the first day and the finishing on the second. Given the patient's age, Dr. Gross and Hoffman opted to mimic the dentition of a patient who had previously had orthodontic treatment and experienced some mild shifting and slight crowding over the years. "We tried to simulate some rotation and enhanced incisal imperfections to keep his smile natural looking," says Hoffman. ###4 } Esthetic Check To get a sense of how the restorations would look in the mouth, Hoffman created mock lips using red wax. He took photos and used Photoimpression Gold software to edit the photos to give an idea of how the final restorations could be stained and colored and then sent the photos to Dr. Gross for his approval. "This is a great photo editing tool and it allows me to enhance incisal translucency and interproximal shading. I use it to show patients the potential final outcome during shade consults and as a teaching tool when training ceramists," says Hoffman. ###5 } The Seating Upon approval of the photos, Hoffman stained and glazed the restorations and travelled to Salina, about an hour and a half away from the lab, to ensure a one-day seating. The seating process took eight hours. Given the size of the case and the fact that the patient had no teeth, Hoffman anticipated the need to redo at least a few of the restorations but was pleased that none of the units had to be remade. Some contacts on the lowers had to be adjusted and polished but, otherwise, it was a very smooth seating. "Dr. Gross and I were high-fiving each other. We made the patient's mouth functional in a way it hadn't been in years. Plus we gave him confidence in speaking and eating and probably knocked 20 years off his appearance," says Hoffman.
Arian Deutsch, CDT, offers an easy, systematic model analysis concept that provides important information for the ideal tooth setup taking into consideration the respective atrophy of the jaws without...See more the use of complex devices, instruments or a specific type of articulator. He covers ideal positioning of each full anatomical tooth, tips and tricks for simple modellation of the gingiva tissue according to nature, and the advantages of using fully anatomical teeth made of improved material for exceptionally high durability and stability.