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Effect of dehydration and rehydration intervals on fracture resistance of reattached tooth fragments using a multimode adhesive
Author(s) -
Poubel Déborah L. N.,
Almeida Júlio César F.,
Dias Ribeiro Ana P.,
Maia Guilherme B.,
Martinez Jesús Maurício G.,
Garcia Fernanda Cristina P.
Publication year - 2017
Publication title -
dental traumatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.82
H-Index - 81
eISSN - 1600-9657
pISSN - 1600-4469
DOI - 10.1111/edt.12344
Subject(s) - dehydration , dentistry , adhesive , materials science , orthodontics , medicine , chemistry , composite material , biochemistry , layer (electronics)
Background/Aims The tooth fragment bonding technique, frequently used to restore traumatized teeth, may be affected by dehydration/rehydration periods. The aim of this study was to evaluate the effects of different dry and wet storage intervals on multimode adhesive bonding between reattached fragments and teeth. Materials and Methods Eighty‐four bovine incisors were fractured and randomized into groups (n=12). After teeth fracturing, each specimen was assigned to one of the following groups: G0: control group (sound tooth); GA 1 and GA 2: 1‐h dehydration and a 15‐min or 24‐hours rewetting period, respectively; GB 1 and GB 2: 24‐hours dehydration and a 15‐minutes or 24‐hours rewetting period, respectively; and GC : 1‐hour ( GC 1) or 24‐hours ( GC 2) dehydration period only. Tooth fragments were then reattached using a multimode adhesive in a self‐mode technique with a flowable resin composite. The fracture resistance was evaluated in a universal testing machine under a compressive load (1 mm/min −1 ). Data were submitted to two‐way analysis of variance and post hoc Tukey test (5%). Results No significant interaction between dehydration and rehydration intervals was observed ( P >.05). Only the step of rehydration significantly affected the reattachment strength when compared to the groups submitted only to dehydration, regardless of the interval (15 minutes or 24 hours). Conclusion Rehydrating a tooth fragment for 15 minutes before bonding with a multimode adhesive maintained sufficient moisture to increase reattachment strength.