Clinical evaluation of interocclusal recording materials in bilateral free end cases.
Five combinations of materials commonly used for intermaxillary records in cases of bilateral free end saddle were evaluated: acrylic resin base + wax; acrylic resin base + wax + ZOE paste; acrylic resin base + wax + Duralay resin; condensation silicone; and acrylic resin plate + irreversible hydrocolloid. The materials were evaluated by measuring the vertical distance between pairs of reference points located on the bases of the upper and lower articulated casts. The measurements obtained by manual articulation of the casts were used as the standards to which the measurements obtained with the recording materials were compared. ANOVA revealed significant differences among the materials and the Tukey's test showed that condensation silicone differed significantly (p<0.05) from the acrylic resin + wax combination, while no significant differences (p>0.05) were observed among the remaining materials. The condensation silicone presented the greatest differences from the measurements obtained by manual articulation of the casts whereas the acrylic resin base + wax combination presented the least differences. Based on the findings of this study, the following scale of fidelity can be settled from best to worst: acrylic resin base + wax; acrylic resin plate + alginate; acrylic resin base + wax + ZOE; acrylic resin base + wax + Duralay; and condensation silicone.
Department of Dental Materials and Prosthodontics, Faculty of Dentistry of Ribeirão Preto, University of São Paulo, Brazil. valpag@forp.usp.br
Valéria de Oliveira
Vde O
Pagnano
Osvaldo Luiz
OL
Bezzon
Maria da Glória Chiarello
Mda G
de Mattos
Ricardo Faria
RF
Ribeiro
Miriam Lacalle
ML
Turbino
D000180:Acrylic Resins / Q000737:chemistry; D000464:Alginates / Q000737:chemistry; D003102:Colloids / Q000737:chemistry; D003725:Dental Articulators; D003764:Dental Materials / Q000737:chemistry; D003779:Denture Design; D003829:Denture, Partial / Q000145:classification; D006801:Humans; D007283:Inlay Casting Wax / Q000737:chemistry; D007574:Jaw Relation Record / Q000379:methods*; D008768:Methylmethacrylates / Q000737:chemistry; D012826:Silicone Elastomers / Q000737:chemistry; D013499:Surface Properties; D014716:Vertical Dimension; D015035:Zinc Oxide-Eugenol Cement / Q000737:chemistry
D000180:Acrylic Resins; D000464:Alginates; D003102:Colloids; D003764:Dental Materials; D008768:Methylmethacrylates; D012826:Silicone Elastomers; D015035:Zinc Oxide-Eugenol Cement; C034578:Duralay; D007283:Inlay Casting Wax