Search PubMed⌕ Search

Biomedical subjects

P N Economou

Publications and source records attributed to P N Economou.

9 recordsLinked to original sources
PubMed1980

Bond strength of bimaterial acrylic resin combinations.

While further research is necessary on the subject of the strength and nature of the bond between different types of acrylic resins, our study shows that specimens fabricated from heat-accelerated BPM showed considerably higher transverse strength values when compared with the various bimaterial combinations. From this, and from the fact that all bimaterial combinations broke at the joining interface, it can be inferred that none of the acrylic resin bimaterial combinations developed a true "chemical bond."

Acrylic Resins↗
PubMedDate not supplied

[Single mandibular complete dentures].

Single mandibular complete dentures suffer greater pressures as the basal seat area available is limited and the opposing arch consists more or less of natural teeth. The practical approach of such a case is described. Study casts mounted on a Hanau-H or Dentatus articulator help the dentist form a clear picture of the existing relationships and avoid underestimation of problems and preposterous restorative procedures. Reducing and reshaping upper natural teeth by grinding in order to equilibrate the occlusal scheme becomes unavoidable in such cases. So, the patient should be informed about it from the very beginning. Jaw relation records should be verified and be absolutely correct before setting the lower posterior teeth and performing any major reshaping of the remaining upper teeth. The existence of natural teeth does not usually permit succeeding a bilaterally equilibrated occlusion. So, the posterior teeth are usually set into a cusp-to-cusp relationship and a balancing ramp is properly formed behind the last molars bilaterally, so that a three-point contact is provided in all eccentric movements, if possible. The need of remounting the casts through new interocclusal records and before delivering the denture to the patients is explained in detail. As the acrylic base exhibits dimensional changes long after the insertion of the denture, this occlusal adjustment has to be repeated more than once frequently. If, in spite of these adjustments, the lower denture continues to give symptoms, then the use of some kind of resilient liner is recommended.

Dental Occlusion, Balanced↗