Kök kanal tedavisinin yenilenmesi esnasında çalışma boyu tespitinde farklı apeks bulucuların doğruluğunun değerlendirilmesi

PELİN TÜFENKÇİ

Kök kanal tedavisinin yenilenmesi esnasında çalışma boyu tespitinde farklı apeks bulucuların doğruluğunun değerlendirilmesi

Thesis Type: Doctorate

Institution Of The Thesis: Ankara University, Sağlık Bilimleri Enstitüsü, ENDODONTİ ANABİLİM DALI, Turkey

Approval Date: 2015

Thesis Language: Turkish

Student: PELİN TÜFENKÇİ

Supervisor: AYLİN KALAYCI

Open Archive Collection: AVESIS Open Access Collection

Abstract:

In this study, 90 single-rooted mandibular central and lateral incisors were used. All crowns were cut at the cemento-enamel junction with diamond disc to simplify access to the root canal and provide a stable reference for all measurement. The root canal length of each tooth was measured by placing #15 K-file until the tip visible at the apical foramen under a ×10 operating microscope. The distance from the tip of the file and silicone stop was measured with a digital caliper. The measurements were repeated three times and the mean values were noted as the final measurement data and then 0.5 mm was subtracted from this length and recorded as actual length. Teeth were divided into 3 main groups (30 teeth in each). All roots and the lip clip of the apex locators were embedded to alginate impression material for simulate the periodontium. Each electronic measurement was obtained and repeated three times for Dentaport ZX, Propex pixi, iPex II. These measurements were recorded electronic working length Dentaport ZX (EWLD), Electronic working Length Propex pixi (EWLP) and Electronic Working Length iPex II (EWLi). Root was prepared using the ProTaper NiTi System according each equipment to EWLD, EWLP and EWLi. Master apical file was F2 for all roots. 90 canals were filled using AH Plus sealer and a size of F2 gutta-percha single cone. Following, each apex locator was determined to working length and root canal was prepared using with ProTaper NiTi rotary instruments which was last file "finishing file no.2 (F2)". Roots were obturated AH Plus and gutta-percha cones using with a single cone technique. After 7 days, root canal filling material was removed using ProTaper retreatment files in which the working length was determined by the electronic apex locator. The data were analyzed using SPSS 20 software package. Normal distributions of variables were examined by the number of units due to Shapiro Wilk's. In case of any differences among the groups, Kruskal-Wallis H test was using. The relationship between non-parametric variables was made with Chi-square analysis. RxC table was also used with Monte Carlo simulation. A p level of 0,05 was considered for statistical significance. There were no significant differences among the actual working length and working length according to apex locators (p>0.05). The reliability of Dentaport ZX was 43,3% for -0,50-0 mm, 46.7% for 0,01- 0,5 mm. In the meantime, the reliability of Propex pixi and iPex II were 63,3% for 0,01- 0,5 mm in each. There were no significant differences among the actual working length and root canal retreatment working length according to apex locators (p>0.05). The reliability of Dentaport ZX was 30% for -0,50-0 mm 53,3% for 0,01- 0,5 mm. The reliability of Propex pixi and iPex II were 56,7%, 60% for 0,01- 0,5 mm, respectively. There were no significant differences among the first working length and root canal retreatment working length according to apex locators (p>0,05). The reliability of Dentaport ZX was 40% for -0,50-0 mm and 53,3% for 0,01- 0,5 mm. The reliability of Propex pixi and iPex II were 60%, 63,3% for 0,01- 0,5 mm, respectively.