Effects of bonded composites vs. amalgam on resistance to cuspal deflection for endodontically-treated premolar teeth

To determine, by means of a non-destructive experimental procedure, the extent to which tooth cusps are weakened by endodontic procedures and the effectiveness of adhesive bonding restoration in reducing cuspal deflection as a function of different restorative procedures. A mechanically controlled l...

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Bibliographic Details
Published inAmerican journal of dentistry Vol. 17; no. 4; p. 295
Main Authors Cerutti, Antonio, Flocchini, Piera, Madini, Lorenzo, Mangani, Francesco, Putignano, Angelo, Docchio, Franco
Format Journal Article
LanguageEnglish
Published United States 01.08.2004
Subjects
Adolescent
Adult
Analysis of Variance
Bicuspid - physiopathology
Bite Force
Compomers - chemistry
Composite Resins - chemistry
Dental Alloys - chemistry
Dental Amalgam - chemistry
Dental Bonding
Elasticity
Humans
Root Canal Therapy
Tooth Crown - physiopathology
Tooth, Nonvital - physiopathology
Tooth, Nonvital - therapy
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Summary:To determine, by means of a non-destructive experimental procedure, the extent to which tooth cusps are weakened by endodontic procedures and the effectiveness of adhesive bonding restoration in reducing cuspal deflection as a function of different restorative procedures. A mechanically controlled loading device induced cuspal deflection by axial force (range 98-294 N) on an occlusal surface while LTS laser twin sensors registered the amount of deflection. Cusp deflection values, in microns, were recorded for each tooth. Thirty sound maxillary premolars teeth were sequentially evaluated in the following conditions: A) intact tooth; B) completion of endodontic and restorative procedures. Teeth were randomly divided into five groups and restored respectively with: A) amalgam (Dispersalloy); B) Spectrum TPH; C) Surefil; D) Esthet-X; E) Esthet-X + Dyract Flow. The average loading force needed to induce 1 microm cusp deflection was evaluated, for all groups, in intact teeth (range 49.52-58.76 N/microm) and in restored teeth (range 8.56 - 47.05 N/microm). Statistical analysis (ANOVA for repeated measures) has been performed. Mean structural recovery values after restorative treatment were 17% with amalgam, 60% with Spectrum TPH, 59% with SureFil, 54% with Esthet-X, and 99% with Esthet-X/Dyract.
ISSN:0894-8275