In vivo analysis of post space sealing with different adhesive materials

Abstract

Simone BOPP MV, Master Student in Veterinary Surgery by the UFSM.This study was conducted at the Dental Schools of Brazilian Lutheran University (ULBRA) and University of Passo Fundo (UPF).his in vivo study analyzed the sealing ability of two adhesives in post spaces, cyanoacrylate (Super Bonder® -Henkel Loctite Adesivos Ltda., Itapevi, SP, Brazil) and Scotchbond™ Multi-Purpose (3M Dental Products, St. Paul, MN, USA), testing the hypothesis that their use would result in a decreased leakage through the remaining filling material. Forty extracted premolars (80 root canals) of dogs were used. The root canals were cleaned, shaped and filled by the lateral condensation technique using Sealer 26™. The post space was created removing two thirds of the filling material within the root canal. The canals were randomly divided in three groups, which were treated as follows: Group A received the Scotchbond™ MultiPurpose adhesive system; for Group B the cyanoacrylate adhesive, Super Bonder™, was employed; and no adhesive was applied into the post space for Group C (control group). A glass ionomer provisional restoration was placed allowing the sealer to set for 72 hours. Then the restoration was removed and the root canal was exposed to the oral environment for 45 days. The dogs were then killed and their jaws were removed. The post spaces were filled with India ink and the teeth were restored for 96 hours. Afterwards, the teeth were extracted and the roots were sectioned at the furcation for allocation to their specific groups. The teeth were turned transparent and the quantitative analysis of leakage was performed using light microscopy. The results showed no significant differences between groups, rejecting the initial hypothesis. Leakage occurred in a great extent in all specimens. Therefore, sealing post spaces with the adhesives used in this study was not an effective method to prevent microleakage. UNITERMS:Root canal obturation; Microleakage; Post and core technique; Dentin-bonding agents.

Comparative in vivo analysis of the sealing ability of three endodontic sealers in dog teeth after post‐space preparation

“…The purpose of this choice was to control this variable. Some studies of post‐space preparations were conducted with removal of two‐thirds of root canal filling (19,21,22), and remaining fillings had different lengths, which might mask the actual amount of ink leakage.…”

“…Most studies that evaluate the sealing ability of filling materials are conducted in vitro (9–16), which limits the use of their results in clinical practice. Studies that use animal models more closely approximate the clinical reality (17–22).…”

Influence of Aging on the Fracture Characteristics of Polyetheretherketone Dental Crowns: A Preliminary Study

“…All PEEK crown samples were cemented on the artificial tooth abutments using a medical grade epoxy adhesive (EA M-31 CL, Loctite, Rocky Hill, CT, USA) instead of a clinical resin luting cement to gain maximum bonding between PEEK crown and artificial tooth abutment. Even though this epoxy adhesive passed the ISO 10993 biological tests [ 16 ] and an in vivo study used this adhesive for sealing dental post space [ 17 ], this medical-grade adhesive in this in vitro study was not intended for clinical implication. The abutments with cemented PEEK crowns were embedded in epoxy (EpoFix Kit, Struers, Rødovre, Denmark) for the compression test ( Figure 2 ).…”

Influence of calcium hydroxide points on the quality of intracanal dressing filling

“…The teeth went through a clearing process 3 , 10 by immersion in 5% nitric acid (Química Delaware, Porto Alegre, RS, Brazil) for 72 h (the solution being changed every 24 h), washing in running water for 4 h and successive dehydration in 80% alcohol for 12 h, 90% alcohol for 1 h and 99% alcohol for 3 h (changed every hour). The teeth were then placed in methyl salicylate (Química Delaware Ltda., Porto Alegre, RS, Brazil), which rendered them transparent.…”