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. 2024 Apr 29;14(2):152-160.
doi: 10.4103/jispcd.jispcd_2_24. eCollection 2024 Mar-Apr.

ProTaper universal retreatment retreatment potential in oval-shaped canals filled with different obturation techniques-A micro-computed tomography study

Sherihan E Zongova-Adem  1 , Irina Kalinova Tsenova-Ilieva  2 , Violeta Dimitrova Dogandzhiyska  2 , Snezhanka Zaprinova Topalova-Pirinska  2 , Emilia Goshova Karova  2
Affiliations

ProTaper universal retreatment retreatment potential in oval-shaped canals filled with different obturation techniques-A micro-computed tomography study

Sherihan E Zongova-Adem et al. J Int Soc Prev Community Dent. .

Abstract

Aim: The objective of this in vitro micro-computed tomography investigation is to assess the efficacy of the ProTaper Universal Retreatment System in retreating oval-shaped root canals filled with three obturation procedures.

Materials and methods: Thirty-six lower incisors with a single oval root canal were prepared using XP-Endo Shaper up to size 30/0.04, and allocated into three equal groups based on the filling technique: Group 1: Warm vertical condensation technique; Group 2: GuttaCore obturators; Group 3: Cold lateral condensation technique. All samples were further retreated using the ProTaper Universal Retreatment system. Micro-CT analysis was performed before and after the retreatment procedure. Statistical analysis was performed with a significance level of 0.05. Data analysis was conducted using the Kolmogorov-Smirnov and Kruskal-Wallis H tests.

Results: The best performance of the files was achieved when the removal of the filling in the entire canal was considered. However, this outcome was not statistically significant when compared with the other observed root canal levels. The retreatment procedure could not ensure thorough cleanliness of the canal walls from filling remnants, regardless of the obturation technique and observational level.

Conclusions: The ProTaper Universal Retreatment system used for the removal of gutta-percha and sealer in oval-shaped root canals demonstrated equal effectiveness, regardless of the obturation technique used.

Keywords: Cold lateral condensation; GuttaCore; ProTaper Universal Retreatment; oval-shaped canals; warm vertical condensation.

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Conflict of interest statement

None.

Figures

Figure 1:
Figure 1:
Inclusion criteria for the existence of oval canals verified by two-dimensional radiographs in different planes. (A = frontal plane; B = sagittal plane).
Figure 2:
Figure 2:
Representative samples of reconstructed 3D micro-CT images from each group and their 5-mm and 10-mm cross-sections, showing the filling materials after obturation in red color and the remaining filling material after retreatment with PTU-R in green color. *WVC = warm vertical condensation, GC = GuttaCore, CLC = cold lateral condensation
See this image and copyright information in PMC

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