Dental Tribune Untited Kingdom Edition

April 16-22, 201216 Endo Tribune United Kingdom Edition Ultra Suction Technique The following sequences of images display us through the instillation process starting with two light body vinyl poly- siloxane impressions loaded on special trays. In Figs 1 and 2, the impressions were boxed with particular attention to preserving accurate borders and to encompass the tuber- osity protuberances. Yellow stone was used to pour the casts from the im- pressions and after setting, the cast models were trimmed (Figs 3-4). On the ridge, the location of the spacer bar was pencil designed, making sure that the bar stopped at least 1cm short of the end of the denture (Figs 5-6). The bar was stabi- lised using two or three small drops of cyanoacrylate and any under cuts were blocked- out (Figs 7-8). Hard base plates were pre- pared on top of the spacer bars (Figs 9-10), followed by bite blocks (Fig 11). After bite registration, the casts were mounted on an articulator (Fig 12) and teeth set-up for try-in was carried out (Figs 13-14). In this case study the Agar flasking technique and cold cure acrylic was used. Howev- er, all other flasking and pack- ing techniques are acceptable. Each model was packed in a two part flask (Figs 15-16). The spacer bar remained on the model and any under cuts were blocked-out (Fig 17). Cold cure acrylic poured in (Fig 18). After polymerisation and de-flasking, the bars were re- moved from the dentures by digging prudently to prevent damage to the walls of the re- tention chamber (Fig 19-22). The dentures were then trimmed and polished (Fig 23). It should be noted that if the valves are mounted be- fore polishing the dentures, there is a high risk of ending up with protruding valve cov- ers, which is not a favourable outcome in terms of patient comfort. At the chosen lingual site, the location of the valves was drawn with a felt marker be- tween first and second premo- lar, with the centre of the valve preferably 1-1.5mm above the highest point of the retention chamber (Figs 24-25). The cavities for the valves were prepared with a round bur (Fig 26) intermittently us- ing the gauge side of the ser- vice key for guidance ie,depth and diameter (Figs 27-28). Processing caps were then placed in the valves to protect the core from being filled with self cure acrylic and then tried in (Figs 29a-30). The valves were installed with cold cure acrylic (Figs 31-32). Soft rubber cylinder points were used to remove excess material and to polish around the valves (Fig 33). The dentures were given a fi- nal sheen (Fig 34). The processing caps were removed and the valve body inspected (Figs 35-36). Using a 1mmØ fissure a communication channel was created between the valve and the high point of the reten- tion chamber (Figs 37-38). For dentures with a significant thickness of acrylic between the valves and the retention chamber, drilling is done at an obtuse angle. Each valve was rinsed and dried thoroughly to ensure a smooth placement of the dia- phragm into its housing (Figs 39-40). The perforated cover was fitted and tied up using the service key (Figs 41-43). Preventative maintenance Practitioners were encour- aged to recall their patients every six months. This shows that the clinician cares, thus increasing patient loyalty and also income stream. A simple and efficient re- call system developed by Fred Carson consists of a comput- erised patient database and a recall postcard printed on both sides (Figs 44-45). The patient’s last visit was en- tered into the records. Six months later a pop up win- dow displayed the names due for check-up. A postcard was sent. Most patients responded positively to this follow up. During the biannual visit, dentures were checked for their fit to the supporting tis- sue, followed by a general examination of the oral cav- ity. On this occasion, calculus deposits were removed from UltraSuction Dentures 7” X 5”h Service Pkg Postcard Version 1 It’s time for your check up! Fig 31 Fig 32 Fig 33 Fig 34 Fig 36 Fig 37 Fig 38 Fig 39 Fig 41 Fig 42 Fig 43 Fig 44 Fig 45 Fig 46 Fig 47 Fig 48 Fig 27 Fig 28 Fig 29b Fig 26 page 19DTß Fig 29aFig 30 Fig 35 Fig 40 Fig 49