title: Retention of denture bases fabricated by three different processing techniques - An in vivo study.
abstract: OBJECTIVE
  Distortion due to Polymerization shrinkage compromises the retention. To evaluate the amount of retention of denture bases fabricated by conventional, anchorized, and injection molding polymerization techniques.
  
  
  METHODS
  Ten completely edentulous patients were selected, impressions were made, and master cast obtained was duplicated to fabricate denture bases by three polymerization techniques. Loop was attached to the finished denture bases to estimate the force required to dislodge them by retention apparatus. Readings were subjected to nonparametric Friedman two-way analysis of variance followed by Bonferroni correction methods and Wilcoxon matched-pairs signed-ranks test.
  
  
  RESULTS
  Denture bases fabricated by injection molding (3740 g), anchorized techniques (2913 g) recorded greater retention values than conventional technique (2468 g). Significant difference was seen between these techniques.
  
  
  CONCLUSIONS
  Denture bases obtained by injection molding polymerization technique exhibited maximum retention, followed by anchorized technique, and least retention was seen in conventional molding technique.
authors.affiliation: Department of Prosthodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India.
authors.forename: V H
authors.initials: VH
authors.lastname: Chalapathi Kumar
authors.affiliation: Department of Prosthodontics, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India.
authors.forename: Hemchand
authors.initials: H
authors.lastname: Surapaneni
authors.affiliation: Department of Prosthodontics, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India.
authors.forename: V
authors.initials: V
authors.lastname: Ravikiran
authors.affiliation: Department of Prosthodontics, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India.
authors.forename: B Sarat
authors.initials: BS
authors.lastname: Chandra
authors.affiliation: Department of Prosthodontics, Drs Sudha and Nageswara Rao Siddhartha Institute of Dental Sciences, Chinnaoutpalli, Gannavaram, Andhra Pradesh, India.
authors.forename: Srilatha
authors.initials: S
authors.lastname: Balusu
authors.affiliation: Department of Prosthodontics, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India.
authors.forename: V Naveen
authors.initials: VN
authors.lastname: Reddy
keywords: Acrylic resins; anchorized technique; injection molding technique; retention apparatus