Clinical and Radiographic Evaluation of Root-canal Obturation with Obtura II

Abstract

This study evaluated clinical and radiographic healing of 236 root-canal treatments in 131 cases obturated with the Obtura II system. One operator performed all canal preparation and obturation with sealer. A standardized apical-coronal preparation technique instrumented all canals. Clinical symptoms, periodontal condition, and radiographic findings were evaluated at 3, 6, and 12 months. Radiographs taken immediately postobturation were compared to recall radiographs. The level of the final root filling was classified as short (more than 2 mm short of the apex), flush (within 2 mm), or over (beyond) in 12.7%, 81.4%, and 5.9% of cases, respectively. More than 96% of cases were treated successfully by the Obtura II system. Where roots were filled flush, over, or short, lesions healed in 97%, 93%, and 93% of cases, respectively, with no significant differences (p < 0.05). Root filling excess had no impact on the healing process.Thermoplasticized, injectable, obturation techniques have been developed and available for several years. Heated gutta-percha techniques (low-temperature, high-temperature) have been shown to produce a significantly better quality root-canal obturation than that produced by the lateral-condensation technique (1-3). Especially the high-temperature technique, Obtura II system (Texceed Co., Fenton, MO) has been found to be significantly superior to lateral-condensation methods and has demonstrated the best adaptation to the three-dimensional root-canal system (1).In vitro studies by Weller and Koch (4) (1994) have shown that the Obtura II technique demonstrated the best adaptation to prepared root canals, and the Obtura II system also is commonly used for back-filling. Johnson and Bond (5) suggested that it might be clinically acceptable to backfill canals up to 10 mm in a single increment using sealer and the Obtura II system. The high temperature generated in the root canal can be dissipated through the root surface and periodontal ligament. Molyvdas et al. (6) showed histologically the inflammation reaction in periapical tissue after injection of warm gutta-percha in beagle dogs. However, it is generally accepted that a temperature rise of approximately 10°C above normal body temperature is most critical (7). Weller and Koch (8) (1995) measured the radicular temperatures produced when gutta-percha was heated to 160°C, 185°C, and 200°C and injected into the root canal by Obtura II. The results indicated that the rise in temperature on the root surface was below the level of 10°C and did not cause damage to the periodontal ligament. These in vivo and in vitro studies have shown that Obtura II has a good adaptation to the canal wall and causes no periodontal tissue injury. However, there have been no studies reporting a clinical patient case study of the Obtura II system. The purpose of this study was to evaluate the clinical and radiographic healing of 131 teeth (236 canals) of 87 patients to estimate the relationship of the root-filling level in relation to the root apex, and assess outcomes...

Biocompatibility of various root canal filling materials ex vivo

“…Gutta‐percha is generally considered a biocompatible material for root fillings (Kawahara et al. 1968, Wolfson & Seltzer 1975, Tani‐Ishii & Teranaka 2003).…”

“…An irritating material may cause inflammation that delays or prevents the healing process (Pertot et al 1992). Gutta-percha is generally considered a biocompatible material for root fillings (Kawahara et al 1968, Wolfson & Seltzer 1975, Tani-Ishii & Teranaka 2003.…”

A clinical trial of cold lateral compaction with Obtura II technique in root canal obturation

“…There were more flush obturations and fewer under-filled cases in our study which could be due to difference in preparation and the use rotary instrumentation creating a more tapered preparation replicating the canal anatomy better than hand filing. [15]…”

Morphological behavior and attachment of p19 neural cells to root‐end filling materials

“…GP and ZOE were selected as controls because they are generally considered biocompatible and nonbiocompatible root canal filling materials, respectively (Tani-Ishii and Teranaka 2003).…”