Dental Tribune Untited Kingdom Edition

April 16-22, 201214 Lab Tribune United Kingdom Edition U ltra Suction system in- creases the retention of mandibular com- plete dentures. There reten- tive capacity in comparison to conventional dentures has been positively demonstrated via retention tests and clinical observation. A clinical study published in the EDA Journal (Jan. 2010 Vol. 56) shows a significant improvement in denture re- tention after the application of the Ultra Suction system. The aim of this article is to familiarise the clinician with the materials and methods through a comprehensive in- stallation process. Ultra Suction works on a simple mechanical principle: Suction. Two tiny one-way valves, embedded into the lin- gual or palatal aspect of the denture bas, draw air from beneath the denture via two channels, collectively open to a retention chamber (Fig A). As he wearer bites firm- ly, the air trapped between the mucosa and the den- ture is expelled through the valves. Under negative at- mospheric pressure, the dia- phragms seal off the valve inlets. The pressure difference ie, the lower pressure beneath the denture exerts a pull and draws the denture closer to the borders. The result is a better fit to the tissue and an im- proved resistance to dislodg- ing forces (Fig B). The documented dental literature teaches us that the supporting soft tissue under a well crafted maxillary com- plete denture is subjected to -80mmHg of negative atmos- pheric pressure. This is the suction level experienced by upper denture wearers. Ultra Suction valves have been de- veloped to generate the same negative force when applied to the mandibular dentures or palatless maxillary dentures. The system is commercial- ised as a full kit with illustrat- ed mounting instructions. The components many be used for upper or lower dentures, on completely new dentures or fitted on existing dentures during the rebase/reline pro- Mony Paz and Ted J Carson discuss suction dentures Ultra Suction Denture Stabilisation System ‘Ultra Suction works on a simple mechani- cal principle: Suction’ Fig 1 Fig 2 Fig 3 Fig 4 Fig 4 Fig 6 Fig 7 Fig 8 Fig 9 Fig 10 Fig A Fig C Fig E Fig G Fig H Fig I Fig B Fig D Fig F Fig 11 Fig 12 Fig 13 Fig 14 Fig 15 Fig J