Abstract
Swift, accurate impression taking of the bone surface is an indispensable requirement for a successful subperiosteal implant. Therefore, the operability and features of various individual tray materials in combination with precision rubber impression materials were compared to establish an ideal impression taking method of the bone surface. The materials and methods employed for the cases were as follows:
1) Materials for individual tray
(1) Room temperature curing resin: Ostron 100 (GC)
(2) Light-activated resin: Eporex Rebase (Nippon Oil＆ Fats Co., Ltd.)
(3) Thermoplastic resin 1: Erkoplast (Erkodent)
(4) Thermoplastic resin 2: heat forming (Shofu Inc.)
2) Precision Impression Materials
(1) Polysulfide rubber impression materials (Surflex, GC)
(2) Vinyl silicone rubber impression materials (Coltex, Yoshida, Exaflex, GC; Express,3M)
Four subperiosteal implant impression materials (Ostron 100, Eporex Rebase, Erkoplast and heat forming) were applied to the individual tray. As a result, it was found that heat forming was the ideal material from a clinical perspective. This is supported by superior operability without irritation or foul odor, and heat forming properties that allowed for even, sufficient thickness when compared to the other three materials mentioned above.
