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Dental Tribune U.S. Edition | December 2016 A14 INDUSTRY NEWS AD Upper, lower dentures on Rhein83 components By Marco De Angelis, DDS, and Luigi Ciccarelli, dental technician This clinical case illustrates in a sche- matic way some of the stages involved in the realization of an upper and lower overdenture on eight implants: four im- plants on the upper jaw and four on the lower (Fig. 1). This solution will provide greater sta- bility to the prosthesis during the phona- Fig. 1: Ot Equator attachments screwed into the implants. Photos/Provided by Dr. Marco De Angelis Fig. 2: Rhein83 Ot Equator attachment system. Fig. 3: Denture completed. Marco De Angelis, DDS Luigi Ciccarelli, DT tion and chewing functions. This enables the patient to feel safe, comfortable and confident with the prosthesis while in social situations. This technique uses the spherical at- tachments that enable the clinician to reduce the final costs when compared with a solution using a bar. The fact that the prosthesis will be re- tained by implants does not lessen the need that the prosthesis achieve all of the other requirements of a traditional prosthesis: It must have an appropriate extension of the edges, a correct vertical dimension, a repeatable centric relation- ship and a correct assembly of the teeth. The prosthesis thus conceived will not have only an implant support but it also will have a mucous support. In the presence of reduced vertical dimensions and a high number of im- plants, it is preferred to use of a super- structure of cobalt chromium that will prevent any breakage in correspondence of the metal housings containing the re- tentive caps. The clinician, before fixing the reten- tive caps (Fig. 2), will check the insertion paths of the prosthesis to eliminate re- sidual areas of compressions with a spe- cial paste and the centric contacts. The fixing of the retentive caps with liquid resin will be facilitated by the use of protective disks that prevent the resin from invading the undercuts of the attachments, al- lowing an easy re- moval of the pros- thesis once cured. After the curing, the excess of resin will be finished with a bur. Before the fi- nal delivery, the patient will be instructed on how to properly store and clean the prosthesis and implants. The prosthesis in situ received clear sat- isfaction from the patient. Thanks is due to Vincenzo Liberati of Lab. DentaLine for the construction of the superstruc- ture (Fig. 3). For more information, you can visit www.marketing@rhein83.it. Read more online The full version of this article — in English as wellasinitsoriginalItalian(“Protesisuperiore e inferiore su componentistica Rhein83”) — can be found on the Dental Tribune Interna- tional website at www.dental-tribune.com.