Two-year clinical and SEM evaluation of glass-fiber-reinforced inlay fixed partial dentures.
OBJECTIVE
To clinically evaluate conservative fiber-reinforced composite inlay fixed partial dentures (IFPDs) bonded to inlay abutments.


METHODS
Forty fiber-reinforced composite IFPDs were made for 29 patients. Restorations were manufactured with the composite Targis reinforced by Vectris prefabricated glass-fiber elements and were inserted with a high viscosity insertion technique. Forty bonded IFPDs were examined clinically after 1 year, and 25 after 2 years, using modified USPHS criteria. Twenty-five abutment inlays and 12 pontics were analyzed quantitatively by scanning electron microscopy SEM. Results were tested for statistical significance with ANOVA.


RESULTS
Although most clinical criteria were rated "alpha", four IFPDs had to be replaced: two retainers debonded and two presented total delamination of veneering material from fiber framework. Two partial delaminations were repaired intraorally. No fractures of framework were observed. SEM marginal analysis of tooth-composite interface exhibited 96.5 +/- 3.0% continuous margin at baseline, 91.0 +/- 5.7% at the 1-year and 89.6 +/- 5.2% at the 2-year recall. Decrease of marginal quality was statistically significant between baseline and 1 year (P= 0.001), but not between 1- and 2-year recalls.
Göhring
Till N
TN
Department of Preventive Dentistry, Periodontology and Cariology, University of Zurich, Switzerland. goehring@zzmk.unizh.ch
Schmidlin
Patrick R
PR
Lutz
Felix
F
D000179:Acrylates / Q000737:chemistry; D000180:Acrylic Resins / Q000737:chemistry; D000328:Adult; D000368:Aged; D000704:Analysis of Variance; D003188:Composite Resins / Q000737:chemistry*; D000044:Dental Abutments; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure; D003764:Dental Materials / Q000737:chemistry*; D017269:Dental Prosthesis Repair; D019232:Dental Restoration Failure; D003801:Dental Veneers; D003779:Denture Design; D003830:Denture, Partial, Fixed; D005260:Female; D005500:Follow-Up Studies; D005898:Glass / Q000737:chemistry*; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D007284:Inlays; D008297:Male; D008855:Microscopy, Electron, Scanning; D008875:Middle Aged; D019252:Radiography, Dental, Digital; D012823:Silicate Cement / Q000737:chemistry; D013499:Surface Properties; D019231:Tooth Preparation, Prosthodontic
D000179:Acrylates; D000180:Acrylic Resins; D003188:Composite Resins; D003764:Dental Materials; D005899:Glass Ionomer Cements; C090969:Tetric; C111282:dental polyglass; C009753:fiberglass; D012823:Silicate Cement; C040415:heliobond