Eloi Dezan Júnior
,João Eduardo Gomes Filho,,Pedro Felício Estrada Bernabé,Rodrigo Eduardo Camazano, ,Priscila Aliane da Cruz Rocha, ,Eduardo Passos Rocha,,Renato Nicolás Hopp
A temporary filling should seal the endodontic access cavity to avoid re-infection of the root canal system between endodontic treatment appointments. Frequently, acrylic provisory crowns are used to seal the tooth submitted to endodontic treatment. However, it is not clear if acrylic crowns can accurately seal the tooth, thus avoiding the re-infection of the canal.
AIM: The aim of this study was to compare the microleakage of provisory acrylic-resin crowns bonded with TempBond NE and access cavities sealed with Coltosol® in teeth that received calcium hydroxide or furacin paramonoclorophenol (FPMC) as dressing. METHODOLOGY: Sixty single-rooted canals were instrumented and prepared to receive acrylic provisory crowns reinforced with inner posts. All teeth received calcium hydroxide or furacin paramonoclorophenol as dressing. 40 canals received provisional crowns cemented with TempBond NE and the remaining 20 canals were sealed with Coltosol® in their access openings. After placement of the temporary filling, teeth were thermocycled, stained and sectioned longitudinally. RESULTS: We found a higher coronal marginal infiltration when provisional acrylic crowns were bonded with TempBond NE. Teeth sealed with Coltosol® showed infiltration only into the cement. Infiltration did not reach the dressing when Coltosol® was used.
CONCLUSION: calcium hydroxide or FPMC dressings did not interfere with the quality of the sealing, and provisional acrylic crowns bonded with TempBond NE did not allow an adequate marginal seal.
Clinical Significance: When performing multiple-visit endodontic treatments on teeth that bear, or are bound to bear, a provisional crown, intracanal medications should be changed or replaced after one week periods. When using calcium hydroxide as intracanal dressing, teeth should be left with no