Research

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Issue: 02/2015
Clinical experience with various prosthetic materials for circular fixed bridges on tilted implants

Introduction: The treatment of edentulous jaws with circular bridges and a reduced number of implants has become an established treatment option. For the prosthetic restoration various treatment concepts are available that have been investigated in this retrospective study of possible risk factors.

Material and method: In a period from May 2008 to September 2013 a total number of 54patients received 62fixed bridges in the mandible or maxilla. 26fixed bridges were delivered in group A with a metal or zirconium oxide framework and ceramic veneering. In group B, after the temporary restoration a metal framework with the veneering by prefabricated composite veneers was used in 29jaws. In group C, the superstructures were made by high performance poly-mer framework and the fixation of prefabricated composite veneers in 7jaws.

Results: In group A, 3bridges showed a smaller chipping with the loss of one or more superficial layers of the ceramic veneering. For one bridge a deep fracture of the veneering occured. Two patients did not accept the superstructure, since at maximum intercuspidation a very rigid bit down was felt without damping behavior. Two patients were disappointed because the temporary restoration with the composite veneers was classified as aesthetically pleasing to the ceramic supply. In group B, there was a flaking of the composite veneer, after a previously well-controlled oromandibular dysfunction due to current stress load started again. In 2patients with a renewed high nicotine consumption of 30 and 40cigarettes per day after 29 and 42months, an extra-oral polishing and revision of the bridges was necessary. In group C no complications were evident in the short follow-up period.

Conclusion: The use of composite veneers for a circular fixed bridge shows a high aesthetic acceptance at a low rate of complications requiring treatment. Subjects with impaired compliance or a history of functional disorders are particularly suitable for a composite veneered superstructure, as these can be easily, quickly and inexpensively repaired. The application of ceramic-filled PEEK resin enables a cost-effective framework fabrication and shows after the first application phase no noticeable complication.

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Issue: 02/2015
SonicWeld: A case report on bone grafting of severe lateral and vertical atrophy

Introduction: The present case report describes the successful alveolar ridge reconstruction in a patient with severe lateral and vertical bone atrophy.

Material and Method: After the traumatic loss of tooth 21 17years ago, an implant was inserted and restored prosthetically to replace the lost tooth 21. The implant was positioned far to the cranial due to the lack of bone.

Results: 17years after successful restoration, the implant broke in the apical third. Even before the remaining implant fragment was removed, it was obvious that the cranial implant position had caused severe lateral and vertical bone loss. Two months after explantation, the alveolar ridge defect was augmented with SonicWeld Rx, bone substitute material and autogenous bone. Four months later an implant could be inserted after the complete reconstruction of the alveolar ridge. Six months after the successful osseointegration of the implant a prosthetic restoration was placed.

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