<p><strong>Objective: </strong>The objective of this study was to evaluate the 6-month clinical performance of class I occlusal composite resin restorations through a multicenter, randomized, double-blind, clinical trial. <strong>Material e Métodos: </strong>Two hundred and eighty class I occlusal restorations were performed in 70 patients (aged between 17 to 50 years).  The restorations were divided into four groups: G1 (Filtek P60/3M ESPE); G2 (Rok/SDI); G3 (Filtek™ P90/3M ESPE); G4 (Evolux/Dentsply). Two pre-calibrated dental practitioners performed and evaluated the restorative procedures regarding to color match, marginal discoloration, recurrent caries, wear (anatomic form) and marginal integrity according to the USPHS criteria. <strong>Resultados: </strong>In 85.8% of the evaluated restorations was observed the ideal score (A) for color match; 91.4% for marginal discoloration; 100% for recurrent caries; 87.7% for wear (anatomic form) and 99.3% for marginal integrity.<strong> Conclusion: </strong>The composite resins used in this study presented satisfactory and similar clinical performance in a 6-month clinical evaluation.</p><p><strong>Keywords</strong></p><p>Dentistry; Composite resins; Permanent dental restoration; Molar; Bicuspid.</p>

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