Thermoplasticity capacity of gutta‑percha with different tapers
Capacidade de termoplastificação da guta-percha com diferentes conicidades
Nascimento, Camila Almeida; Tanomaru-Filho, Mário; Bosso, Roberta; Kuga, Milton Carlos; Guerreiro-Tanomaru, Juliane Maria
Rev. odontol. UNESP, vol.39, n6, p.351-354, 2010
Abstract
Objective: The objective of this study was to evaluate the thermoplasticity of the gutta-percha cones used for root canal obturation: Dentsply convencional (Dentsply Ind. e Com., Petrópolis, RJ, Brazil), Dentsply 0.04, (Dentsply Ind. e Com., Petrópolis, RJ, Brazil), Antaeos 0.04 (VDW GmbH, Munich, Germany), ProTaper (Dentsply Ind. e Com., Petrópolis, RJ, Brazil) and Alfa 0.06 (VDW GmbH, Munich, Germany). Material and method: Specimens of each material (n = 10) were prepared after heating. After 24 hours were again heated to 70 °C and placed between two glass plates and subjected to a compression of 5 kg for 2 minutes. The scanned image of the groups before and after the compression was analyzed with the software Image Tool (UTHSCSA Image Tool for Windows version 3.0, San Antonio, TX, USA). The flow capacity of the different materials was determined by the difference between the initial and final area of each specimen. The results were submitted to ANOVA and Tukey test with significance level of 5%. Result: Among the material evaluated, the gutta-percha cones Alpha 0.06 and ProTaper presented more thermoplasticity than other groups (p < 0.05). The Dentsply gutta-percha presented thermoplasticity intermediate. The groups Dentsply 0.04 and 0.04 showed lower thermoplasticity after heating (p > 0.05). Conclusion: The gutta‑percha present different property of thermoplasticity, which is important to selection of thermoplastic obturation techniques.
Keywords
Endodontics, root canal obturation, gutta-percha
Resumo
Objetivo: O objetivo deste estudo foi avaliar a capacidade de termoplastificação da guta-percha com diferentes conicidades utilizadas na obturação de canais radiculares: Dentsply convencional (Dentsply Ind. e Com. Ltda., Petrópolis - RJ, Brasil), Dentsply 0,04, (Dentsply Ind. e Com. Ltda., Petrópolis-RJ, Brasil), Antaeos 0,04 (VDW GmbH, München, Alemanha), Protaper (Dentsply Ind. e Com. Ltda., Petrópolis-RJ, Brasil) e Alfa 0,06 (VDW GmbH, München, Alemanha). Material e método: Corpos de prova de cada material (n = 10) foram confeccionados após aquecimento. Depois de 24 horas, foram novamente aquecidos à temperatura de 70 °C e posicionados entre duas placas de vidro, sendo submetidos a uma compressão de 5 kg por 2 minutos. A imagem digitalizada dos grupos antes e depois da compressão foi analisada no software Image Tool (UTHSCSA Image Tool for Windows version 3.0, San Antonio, TX, USA). A capacidade de escoamento dos diferentes materiais foi determinada pela diferença entre as áreas inicial e final da cada espécime. Os resultados obtidos foram submetidos ao teste ANOVA e Tukey com nível de significância de 5%. Resultado: Dentre os materiais analisados, os cones de guta-percha Alfa 0,06 e Protaper apresentaram maior termoplastificação quando comparados aos demais (p < 0,05). O grupo Dentsply apresentou termoplasticidade intermediária, enquanto que os grupos Dentsply 0,04 e Antaeos 0,04 apresentaram menor termoplastificação após aquecimento (p > 0,05). Conclusão: Os cones de guta-percha apresentam diferentes propriedades de termoplastificação, sendo esta característica importante na seleção das técnicas de obturação termoplásticas.
Palavras-chave
Endodontia, obturação do canal radicular, guta-percha
References
1. Schilder H. Filling root canals in three dimensions. Dent Clin North Am. 1967 Nov: 723-44.
2. Cruse WP, Bellizzi R. A historic review of endodontics: 1689- 1963. Part 1. J Endod. 1980; 6: 495-9.
3. Tanomaru-Filho M, Bier CAS, Tanomaru JMG, Barros DB. Evaluation of the thermoplasticity of different gutta-percha cones and the TC System. J Appl Oral Sci. 2007; 15: 131-4.
4. Gurgel-Filho ED, Feitosa JPA, Teixeira FB, Monteiro de Paula RC, Araújo Silva JB, Souza-Filho FJ. Chemical and x-ray analyses of five brands of dental gutta-percha cone. Int Endod J. 2003; 36: 302-7.
5. Maniglia-Ferreira C, Silva JBA Jr, Paula RCM, Feitosa JPA, Cortez DGN, Zaia AA, et al. Brazilian gutta-percha points. Part I: chemical composition and X-ray diffraction analysis. Braz Oral Res. 2005; 19: 193-7.
6. Schilder H, Goodman A, Aldrich W. The thermomechanical properties of gutta-percha. Part III: determination of phase transition temperatures for gutta-percha. Oral Surg Oral Med Oral Pathol. 1974; 38: 109-14
7. Tagger M, Gold A. Flow of various brands of gutta-percha cones under in vitro thermomechanical compaction. J Endod. 1988; 14: 115-20.
8. Jarrett IS, Marx D, Covey D, Karmazin M, Lavin M, Gound T. Percentage of canals filled in apical cross sections: an in vitro study of seven obturation techniques. Int Endod J. 2004; 37: 392-8.
9. Lea CS, Apicella MJ, Mines P, Yancich PP, Parker MH. Comparison of the obturation density of cold lateral compaction versus warm vertical compaction using the continuous wave of condensation technique. J Endod. 2005; 31: 37-9.
10. Goodman A, Schilder H, Aldrich W. The thermomechanical properties of gutta-percha II: the history and molecular chemistry of gutta‑percha. Oral Surg Oral Med Oral Pathol. 1974; 37: 954-61
11. Beatty RG, Vertucci FJ, Zakariasen KL. Apical sealing efficacy of endodontic obturation techniques. Int Endod J. 1986; 19: 237-41.
12. Kardon BP, Kuttler S, Hardigan P, Dorn SO. An in vitro evaluation of the sealing ability of a new root-canal obturation system. J Endod. 2003; 29: 658-61.
13. Gordon MPJ, Love RM, Chandler NP. An evaluation of 0.06 tapered gutta-percha cones for filling of 0.06 taper prepared curved root canals. Int Endod J. 2005; 38: 87-96.
14. Monticelli F, Sword J, Martin RL, Schuster GS, Weller RN, Ferrari M, et al. Sealing properties of two contemporary single-cone obturation systems. Int Endod J. 2007; 40: 374-85.
15. Kolokuris I, Arvanitoyannis I, Blanshard JMV, Robinson C. Thermal analysis of commercial gutta-percha using differential scanning colorimeter and dynamic mechanical thermal analysis. J Endod. 1992; 18: 4-9.
16. Spangberg LSW. Instruments, materials, and devices. In: Cohen S, Burn RS, editors. Pathways of the pulp. 7th ed. St. Louis: CV Mosby;
1998. p. 508-10.
17. De Deus QD. Frequency, location, and direction of the lateral, secondary, and accessory canals. J Endod. 1975; 1: 361-6.
18. Miner MR, Berzins DW, Bahcall JK. A comparison of thermal properties between gutta-percha and a synthetic polymer based root canal filling material (Resilon). J Endod. 2006; 32: 683-6.
19. Combe EC, Cohen BD, Cummings K. Alpha and beta forms of gutta-percha in products for root canal filling. Int Endod J. 2001; 34: 447‑51.
20. Carvalho-Sousa B, Almeida-Gomes F, Carvalho PRB, Maniglia-Ferreria C, Gurgel-Filho ED, Albuquerque DS. Filling lateral canals: Evaluation of different filling techniques. Eur J Dent. 2010; 4: 251-6.
21. Wu MK, Kast’áková A, Wesselink PR. Quality of cold and warm gutta-percha fillings in mandibular premolars. Int Endod J. 2001; 34: 485‑91.
22. Mente J, Werner S, Koch MJ, Henschel V, Legner M, Staehle HJ, et al. In vitro leakage associated with three root-filling techniques in large and extremely large root canals. J Endod. 2007; 33: 306-9.
23. Gurgel-Filho ED, Feitosa JPA, Gomes BPFA, Ferraz CCR, Souza Filho FJ, Teixeira FB. Assessment of different gutta-percha brands during the filling of simulated lateral canals. Int Endod J. 2006; 39: 113-8.
Facebook
Google+
Twitter
LinkedIn
Mendeley
StumbleUpon
CiteULike
Reddit
Email