A comparison of the sealing ability of various temporary restorative materials to seal the access cavity: Anin vitrostudy.
BACKGROUND
In multiple-appointment root canal treatment, a temporary filling material is used to seal the access cavity between visits. The primary function of this material is to prevent the contamination of the root canal system by fluids, organic debris, and bacteria from the oral cavity.


METHODS
A total of fifty extracted noncarious unrestored human maxillaryanterior teeth with intact crowns and roots were selected The canals were instrumented using stepback technique and sodium hypochlorite (3%) and hydrogen peroxide (3%) were used as irrigants for each specimen alternatively. The coronal two-thirds of each canal were flared using Gates-Glidden drills up to no. 3 size and obturated with Gutta-percha using zinc oxide-eugenol (ZnOE) as sealer. The teeth were then randomly selected and divided into six groups out of which four were experimental groups and two control groups. The teeth were then immersed in 2% methylene blue dye solution for 3 days. All sealing materials and Gutta-percha were gently removed from the walls of the canal, and the entire circumference of the canal wall examined for dye penetration.


RESULTS
The lowest mean leakage was in the Fermit-N group followed by Cavit-W, ZnOE, intermediate restorative materials (IRM), and positive control.


CONCLUSIONS
Fermit-N showed better sealing ability compared to cavit, ZnOE and IRM.
Department of Conservative Dentistry and Endodontics, Vivekanandha Dental College for Women, Tiruchengode, Tamil Nadu, India.
Aji
A
Markose
Department of Pedodontics, VMSDC, Salem, Tamil Nadu, India.
Ramesh
R
Krishnan
Department of Oral Pathology, VMSDC, Salem, Tamil Nadu, India.
Maya
M
Ramesh
Department of Conservative Dentistry, Yenepoya Dental College, Mangalore, Karnataka, India.
Shishir
S
Singh
Access cavity; microleakage; sealing ability; temporary restorative material