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1 Eastman Dental Dispensary, Rochester, N. Y.
1. We have demonstrated an adhesive acrylic resin material that bonds strongly to "wet" dentin surfaces of extracted teeth. The amount of adhesion can be approximately doubled by an acid etching of the dentin surface prior to application of the adhesive resin.
2. The bonds show good resistance to water immersion. For the untreated surfaces, initial bond strengths of 28 kg./cm.2 are reduced to 15 kg./cm.2 after three months water immersion. Initial values for acid-treated surfaces of 53 kg./cm.2 are reduced to 28 kg./cm.2 after five months water immersion.
3. The possibility is suggested that the bonding is due to chemical combination between one of the constituents of the seal and the organic matter of the dentin.
Submitted on June 24, 1955
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