ABSTRACT
Objective: The aim of this study was to compare the resistance to vertical root fracture of root-filled teeth restored with four different fiber-reinforced composite [FRC] post systems and two types of dual-cured resin luting agents
Materials and Methods: Ninety extracted human maxillary central incisors were selected and decoronated to obtain a standardized root length of 14 mm. After root canal obturation, post spaces were prepared to a depth of 10 mm with a No. 3 post drill. The specimens [n = 80] were divided into two groups [n = 40] according to the resin luting agents used: group 1, Variolink II + ExciTE DSC; group 2, RelyX Unicem. These groups were subdivided into four subgroups [n = 10] and restored with one of the following post systems: [a] DT Light, [b] DT Light SL, [c] FRC Postec and [d] Everstick, while the remaining 10 teeth served as controls. The roots were subjected to axial compressive loading using a 2.2-mm-diameter metal sphere in a universal testing machine [0.5 mm/min]. A factorial experiment with a single control group [analysis of variance] was used to test the resistance of the specimens
Results: Groups 2a [DT Light + RelyX Unicem; 398.5 N] and 1b [DT Light SL + Variolink II + ExciTE DSC; 431.1 N] had significantly higher resistance to fracture than the control group [334.1 N; p < 0.05]. DT Light SL and FRC Postec Plus were more resistant to fracture when Variolink II was used as the luting cement. DT Light and Everstick had higher fracture resistance when they were luted with RelyX Unicem [p < 0.05]
Conclusion: The results of this study indicate that the use of quartz fiber posts [DT Light and DT Light SL] with an adhesive luting cement in root-filled teeth may reinforce the root to some extent
ABSTRACT
To investigate the oral health [with regard to the periapical status, quality of root fillings and coronal restorations] in an urban adult Turkish subpopulation using digital panoramic radiographs. One thousand digital panoramic radiographs involving 28,000 teeth were selected from the archive of the Public Oral and Dental Health Center of Isparta. Coronal status [the type of restoration, signs of marginal leakage or decay], root filling quality [length and lateral seal] and periapical status [according to Periapical Index, PAI] were evaluated. Correlations between apical periodontitis [AP] and the quality of root fillings or coronal restorations were statistically analyzed using the chi [2] test. Of the 28,000 teeth evaluated, 22,380 [80.0%] were sound, 4,732 [16.9%] were missing, 753 [2.6%] were filled and 135 [0.5%] were decayed. Of the 753 coronal restorations, 400 [53.1%] were radiographically acceptable. Of the 23,268 teeth, 601 [2.6%] were root filled and 247 root fillings were adequate. Ninety-five [15.8%] root-filled teeth had AP [PAI 3-5]. Out of the total, the AP prevalence was 0.4% in root-filled teeth and 0.8% in teeth without root fillings. The presence of AP was significantly correlated with inadequate coronal restorations and root canal fillings [p = 0.000]. Tooth type, quality and type of coronal restorations, and length and homogeneity of root fillings significantly affected periapical status