A Clinical Evaluation of the Reinforced Polycarbonate Denture Constructed by Compression Molding (Sumipuroi Denture System).

One hundred thirty-four dentures with reinforced polycarbonate resin (PC), utilizing a compression molding method called the Sumipuroi Denture System, were inserted into 82 partially or completely edentulous patients at the clinic of Kyushyu Dental College. Continuous clinical observation of the dentures was conducted from approximately four months to two yesrs after insertion.The results were as follows:1. No fractures or stress cracks were found in the denture bases except for one denture base which had been repaired with auto-polymerized acrylic resin at the first insertion.2. Artificial tooth loss was seen in 6 cases, which were all plastic anterior teeth with high wear resistance. Stain penetration into the interfaces between the plastic teeth and the PC denture base was also seen in some cases.3. Not a single tooth fell from the denture bases because the PC denture base had excellent adhesion to conventional acrylic resin teeth even without the creation of mechanical retentive shapes and/or the use of any chemical bonding agents on the teeth.4. No troubles due to shrinkage of denture base and dimensional change of artificial teeth caused by the molding of the PC denture was found during clinical observation.