Evaluation of success rate of endodontic treatment performed by students with stainless-steel K-files and nickel-titanium hand files
| Autor: | E.O. Delano, Mary T. Pettiette, Martin Trope |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Molar
Materials science Radiography Treatment outcome Statistics as Topic Students Dental Dentistry Treatment failure Endodontics Absorptiometry Photon Nickel Image Processing Computer-Assisted Humans Treatment Failure General Dentistry Titanium Wound Healing business.industry Dental alloys Periapical Tissue Follow up studies Reproducibility of Results Equipment Design Prognosis Stainless Steel Root Canal Therapy Radiographic Image Enhancement Treatment Outcome Nickel titanium Numerical estimation Dental Pulp Cavity business Root Canal Preparation Dental Alloys Follow-Up Studies |
| Zdroj: | Journal of endodontics. 27(2) |
| ISSN: | 0099-2399 |
| Popis: | A previous study by our group found nickel-titanium (NiTi) 0.02 hand files maintained the original canal shape better than similar stainless-steel K-files (SS-K). Inexperienced dental students used both file types on molar teeth. The purpose of this study was to compare the 1-yr success rate of endodontic treatment of the same teeth used in our previous study. Twelve-month follow-up radiographs were compared with the immediate follow-up radiographs. Both sets of radiographs were taken with the same customized stent. Quantification of osseous changes using digital imaging was used. Thus, a reliable numerical estimation (densitometric ratio) of disease and healing processes could be established. Sixty-seven percent of the patients returned for the 12-month radiographs (19 NiTi vs. 21 SS-K). Immediate postoperative periapical status was found to be similar (p0.05). Teeth instrumented with the NiTi files demonstrated a higher mean change in densitometric ratio, compared with SS-K files (p0.05). Further tests of success (values:or =0) and failure (value:or =0) with the Fisher exact test showed more success (decreasing radiographic density) with NiTi files and more failures (increasing radiographic density) with SS-K type files (por = 0.03). This study indicates that maintaining the original canal shape after instrumentation leads to a better prognosis of endodontic treatment. |
| Databáze: | OpenAIRE |
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