Restorative Dentistry & Endodontics

Saeid Tavanafar

2 Articles

Fracture resistance of upper central incisors restored with different posts and cores: Maryam Rezaei Dastjerdi, Kamran Amirian Chaijan, Saeid Tavanafar; Restor Dent Endod 2015;40(3):229-235. Published online July 24, 2015; DOI: https://doi.org/10.5395/rde.2015.40.3.229

Objectives

To determine and compare the fracture resistance of endodontically treated maxillary central incisors restored with different posts and cores.

Materials and Methods

Forty-eight upper central incisors were randomly divided into four groups: cast post and core (group 1), fiber-reinforced composite (FRC) post and composite core (group 2), composite post and core (group 3), and controls (group 4). Mesio-distal and bucco-lingual dimensions at 7 and 14 mm from the apex were compared to ensure standardization among the groups. Twelve teeth were prepared for crown restoration (group 4). Teeth in other groups were endodontically treated, decoronated at 14 mm from the apex, and prepared for posts and cores. Resin-based materials were used for cementation in groups 1 and 2. In group 3, composite was used directly to fill the post space and for core build-up. All samples were restored by standard metal crowns using glass ionomer cement, mounted at 135° vertical angle, subjected to thermomechanical aging, and then fractured using a universal testing machine. Kruskal-Wallis and Mann-Whitney U tests were used to analyze the data.

Results

Fracture resistance of the groups was as follows: Control (group 4) > cast post and core (group 1) > fiber post and composite core (group 2) > composite post and core (group 3). All samples in groups 2 and 3 fractured in restorable patterns, whereas most (58%) in group 1 were non-restorable.

Conclusions

Within the limitations of this study, FRC posts showed acceptable fracture resistance with favorable fracture patterns for reconstruction of upper central incisors.

Citations

Citations to this article as recorded by

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Influence of operator's experience level on lifespan of the WaveOne Primary file in extracted teeth: Abdulrahman Mohammed Saleh, Saeid Tavanafar, Pouyan Vakili-Gilani, Noor Jamal Al Sammerraie, Faahim Rashid; Restor Dent Endod 2013;38(4):222-226. Published online November 12, 2013; DOI: https://doi.org/10.5395/rde.2013.38.4.222

Abstract PDF PubReader ePub

Objectives

The aim of this study was to assess the influence of operator experience level on the lifespan of the WaveOne Primary file (Dentsply Maillefer, Ballaigues, Switzerland) in extracted teeth.

Materials and Methods

Moderately curved canals of extracted maxillary and mandibular molars were randomly distributed into 2 groups: experienced and inexperienced operators. Ten files were allocated to each group (n = 10). Each canal was prepared until the working length was reached, and the same file was used to prepare additional canals until it separated. The number of canals prepared before file separation was recorded. The fragment length of each file was measured, and the location of the fragment in the canal was determined. Data were statistically analysed using the independent 2-sample t-test.

Results

The 2 operators prepared a total of 324 moderately curved canals of maxillary and mandibular molars. There was no significant intergroup difference in the mean number of canals prepared (p = 0.27). The average lifespan of the WaveOne Primary file was 17.1 and 15.3 canals, and the longest lifespan was 25 and 20 canals, when used by experienced and inexperienced operators, respectively. There were no statistically significant intergroup differences in separated fragment length and location.

Conclusions

Within the limitations of this study, operator experience level appears to have no effect on the lifespan of the WaveOne Primary file in preparation of moderately curved canals. Single teeth with multiple canals can be prepared safely even by a novice operator by using a single file.

Citations

Citations to this article as recorded by

Microstructural, microchemical, and mechanical changes associated with the clinical reuse of two nickel–titanium endodontic instruments
Felipe Augusto Restrepo-Restrepo, Viviana Andrea Holguín-Vásquez, Syldana Julieth Cañas-Jiménez, Paula Andrea Villa-Machado, Sara Ochoa-Soto, Claudia Patricia Ossa-Orozco, Sergio Iván Tobón-Arroyave
Dental Research Journal.2021; 18(1): 48. CrossRef
Fracture incidence of WaveOne Gold files: a prospective clinical study
C. S. P. Bueno, D. P. Oliveira, R. A. Pelegrine, C. E. Fontana, D. G. P. Rocha, J. L. Gutmann, C. E. S. Bueno
International Endodontic Journal.2020; 53(9): 1192. CrossRef
Current Assessment of Reciprocation in Endodontic Preparation: A Comprehensive Review—Part II: Properties and Effectiveness
Gianluca Plotino, Hany Mohamed Aly Ahmed, Nicola Maria Grande, Stephen Cohen, Frédéric Bukiet
Journal of Endodontics.2015; 41(12): 1939. CrossRef

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