Two-year clinical evaluation of packable and nanostructured resin-based composites placed with two techniques.
BACKGROUND
The authors conducted a two-year clinical trial to evaluate the effectiveness of two resin-based composite materials for Class II restorations placed according to two filling techniques.


METHODS
Twenty-six patients received 105 Class II restorations, which the authors distributed randomly into three groups of 35 each. The resin-based composite restorations in group A were composed of average-density material (Ceram X mono [CXM], Dentsply DeTrey, Konstanz, Germany) placed according to the oblique incremental technique (OIT). Restorations in group B were composed of average- and high-density materials (CXM and SureFil [SF], Dentsply DeTrey) placed according to the modified incremental technique (MIT). Restorations in group C were composed of the high-density material (SF) placed with the OIT. The authors evaluated the restorations according to modified U.S. Public Health Service criteria.


RESULTS
At the two-year recall visit, 92 (88 percent) of 105 restorations were available for examination. Restorations in groups A, B and C had success rates of 96.7 percent (29 of 30 restorations), 96.8 percent (30 of 31) and 100 percent (31 of 31), respectively. Esthetic parameters revealed significant (P<.05) cavo-surface marginal discoloration in group B and a rougher surface in group A. With regard to functional parameters, one (3.3 percent) of 30 restorations in group A exhibited reparable changes in marginal integrity.


CONCLUSIONS
Restorations in group B performed worse (P<.05) in terms of esthetic (cavosurface marginal discoloration) and functional (marginal integrity) parameters. Clinical effectiveness was highest in group C and lowest in group B.


CONCLUSIONS
The two resin-based composite materials are effective in Class II clinical situations when placed with either the OIT or MIT.
Monteiro
Patrícia Manarte
PM
Department of Medical Sciences, Faculty of Health Sciences, University Fernando Pessoa, Porto, Portugal. patmon@ufp.edu.pt
Manso
Maria Conceição
MC
Gavinha
Sandra
S
Melo
Paulo
P
D000134:Acid Etching, Dental; D000293:Adolescent; D000328:Adult; D017438:Bisphenol A-Glycidyl Methacrylate / Q000737:chemistry; D003116:Color; D003188:Composite Resins / Q000737:chemistry*; D003430:Cross-Sectional Studies; D003737:Dental Cavity Preparation / Q000145:classification; D018772:Dental Marginal Adaptation; D003764:Dental Materials / Q000737:chemistry*; D003775:Dental Polishing / Q000379:methods; D003793:Dental Restoration, Permanent / Q000145:classification / Q000379:methods*; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008434:Matrix Bands; D008875:Middle Aged; D049329:Nanostructures / Q000737:chemistry*; D009910:Oral Hygiene; D011109:Polymethacrylic Acids / Q000737:chemistry; D012907:Smoking; D013499:Surface Properties; D055815:Young Adult
C520091:CeramX; D003188:Composite Resins; D003764:Dental Materials; D011109:Polymethacrylic Acids; C103500:Prime & Bond; C403464:SureFil packable composite; D017438:Bisphenol A-Glycidyl Methacrylate