title: Comparison of load transfer by maxillary distal extension removable partial dentures with a spring-loaded plunger attachment and I-bar retainer.
abstract: This study photoelastically compared the stress distribution characteristics of two maxillary bilateral distal-extension removable partial denture designs, one using I-bar retention and the other using a semiprecision spring-loaded plunger attachment. Each prosthesis was subjected to vertical and horizontal extension-base loads. Comparisons were made from photographic recordings of isochromatic fringe distributions. The two retention designs produced comparable stresses with splinting of abutments for the plunger attachment. The attachment-retained prosthesis proved less stable with some loadings. Stress patterns followed three trajectories in the maxilla. A basis for stress distribution comparisons to other maxillary removable partial denture attachments is established.
authors.affiliation: University of California, School of Dentistry, Los Angeles.
authors.forename: T
authors.initials: T
authors.lastname: Berg
authors.forename: A A
authors.initials: AA
authors.lastname: Caputo
mesh_terms: D000704:Analysis of Variance; D001718:Birefringence; D000044:Dental Abutments; D003799:Dental Stress Analysis / Q000295:instrumentation / Q000379:methods*; D003781:Denture Retention; D003832:Denture, Partial, Removable; D004548:Elasticity; D008961:Models, Structural; D011048:Polarography; D012399:Rotation