Restorative Dentistry and Endodontics

The Korean Academy of Conservative Dentistry (대한치과보존학회)
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AN IN-VITRO EVALUATION OF SEALER PLACEMENT METHODS IN SIMULATED ROOT CANAL EXTENSIONS

근관 내 불규칙 확장부에서 sealer 적용방법에 따른 충전 효과 평가

  • Kim, Sung-Young (Department of Conservative Dentistry, College of Dentistry, Chonbuk Nationali University) ;
  • Lee, Mi-Jeong (Department of Conservative Dentistry, College of Dentistry, Chonbuk Nationali University) ;
  • Moon, Jang-Won (Department of Conservative Dentistry, College of Dentistry, Chonbuk Nationali University) ;
  • Lee, Se-Joon (Department of Conservative Dentistry, College of Dentistry, Chonbuk Nationali University) ;
  • Yu, Mi-Kyung (Department of Conservative Dentistry, College of Dentistry, Chonbuk Nationali University)
  • 김성용 (전북대학교 치과대학 치의학과 치과보존학교실) ;
  • 이미정 (전북대학교 치과대학 치의학과 치과보존학교실) ;
  • 문장원 (전북대학교 치과대학 치의학과 치과보존학교실) ;
  • 이세준 (전북대학교 치과대학 치의학과 치과보존학교실) ;
  • 유미경 (전북대학교 치과대학 치의학과 치과보존학교실)
  • Published : 2005.01.01
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Abstract

The aim of this study was to evaluate the effectiveness of sealer placement in simulated root canal extensions. Forty resin blocks were attained from the Endo-training Bloc. In each block. The simulated root canal was made with $\#20$, 80taper GT file. After each block was longitudinally split into two halves, a standardized groove was prepared on one canal wall of two halves to simulate the canal extensions with various irregularities. The two halves of each block were assembled and all simulated root canals were obturated by single cone method with AH26 sealer. Four different methods of sealer placement were used: group A, $\#20$ K-file; group B, ultrasonic file; group C, lentulo spiral; group D, EZ-Fill bi-directional spiral. All obturated blocks were stored in $100\%$ humidity at $37^{\circ}C$ for 1 week, Using a low speed saw, each block was sectioned horizontally. Images of the sections were taken using a stereomicroscope at $\times$ 30 magnification and a digital camera. The amount of the sealer in the groove was evaluated using a scoring system, a higher score indicated better sealing effectiveness. The data was statistically analysed by Fisher's Exact Test. The sealing score was the lowest, specially at the middle area of canal extensions in group A, and that was statistically significant difference from other groups. In conclusion, the ultrasonic file, lentulo spiral and EZ-Fill bi-directional spiral were effective methods of sealer placement in simulated canal extensions. The K file was the least effective method, specially at the middle area of canal extensions.

본 실험은 resin 시편을 이용하여 미리 제작한 근관 내 불규칙 확장부에서 근관 충전용 sealer의 적용 방법에 따른 충전 효과를 평가해 보았다. Endo-training Bloc을 절단하여 사십 개의 규격화된 resin 블록 시편을 획득하였다. 각각의 시편에 $\#20$, 08taper GT 파일을 사용하여 근관을 형성하였고 근관에 손상이 가지 않도록 시편을 양분한 후 양분된 시편의 한 쪽 근관 벽에 다양한 근관 내 확장부를 표현하는 구를 형성하였다. 양분된 시편을 결찰하고 절단 부위를 밀봉하였으며 AH26 sealer를 사용하여 단일 cone 충전법으로 근관을 충전하였다. 네 가지의 근관 충전용 sealer의 적용방법을 이용하였다: A군, $\#20$ K-file : B군, ultrasonic file : C군, lentulo spiral: D군. EZ-Fill bi-directioanl spiral. 모든 시편은 $37^{\circ}\;100\%$ 상대습도에서 1주일간 보관한 후 각 시편을 근단에서 3mm, 4mm, 5mm 부위에서 수평으로 절단하고 각각의 절단면을 위상차현미경과 디지털 카메라를 이용하여 30배율로 관찰하고 촬영하였다. 관찰된 절단면은 scoring system을 이용하여 점수를 산정하였고 각 군 간의 통계적인 유의성 유무는 Fisher's Exact Test를 이용하여 시행하였다.

Keywords

References

  1. ElDeeb ME. The sealing ability of infection-molded thermoplasticized gutta-perch. J Endod 11:84-86, 1985 https://doi.org/10.1016/S0099-2399(85)80124-2
  2. Hata G, Kawazoe S, Toda T, Weine FS. Sealing ability of Thermafil with and without sealer. J Endod 18:322-326, 1992 https://doi.org/10.1016/S0099-2399(06)80481-4
  3. Fan B, Wu M-K, Wesselink PR. Leakage along warm gutta-percha fillings in the apical canals of curved roots. Endod Dent Traumatol 16:29-33, 2000 https://doi.org/10.1034/j.1600-9657.2000.016001029.x
  4. Lin LM, Skriber JE, Gaengler P. Factors associated with endodontic treatment failures. J Endod 18:625-627, 1992 https://doi.org/10.1016/S0099-2399(06)81335-X
  5. Hoen MM, Labounty GL, Keller DL. Ultrasonic endodontic sealer placement. J Endod 14:169-174, 1988 https://doi.org/10.1016/S0099-2399(88)80257-7
  6. West WA, Labounty GL, Keller DL. Obturation quality utilizing ultrasonic cleaning and sealer placement followed by lateral condensation wth gutta percha. J Endod 15:507-511, 1989 https://doi.org/10.1016/S0099-2399(89)80190-6
  7. Wiemann Ah, Wilcox LR. In vitro evaluation of four methods of sealer placement. J Endod 17:444-447, 1991 https://doi.org/10.1016/S0099-2399(07)80134-8
  8. Hall MC, Clement DJ, Dove SB, Walker WA. A comparison of sealer placement techniques in curved canals. J Endod 22:638-642, 1996 https://doi.org/10.1016/S0099-2399(96)80055-0
  9. Kahn FH, Rosenberg PA, Schertzer L, Korthals G, Nguyen PNT. An in-vitro evaluation of sealer placement methods. Int Endod J 30:181-186, 1997 https://doi.org/10.1111/j.1365-2591.1997.tb00694.x
  10. Musikant BL, Cohen BI, Deutsch AS. Simplified obturation of tapered canal preparations. Compend Contin Educ Dent 19:1152-1155, 1998
  11. Musikant BL, Cohen BI, Deutsch AS. Rethinking endodontics: attaining total obturation of the root canal system with a simplified system. Gen Dent 47:73-82, 1999
  12. Seidman D. A general dentist's viewpoint of two new endodontic techiques. Compend Contin Educ Dent 20:921-924, 1999
  13. Musikant BL, Cohen BI. Deutsch AS. Report of a simplified endodontic technique. Compend Contin Educ Dent 20:1088-1090, 1999
  14. Bartel CR, Losche GM, Zimmer S, Roulet JF. Dye penetration in root canals filled with AH-26 in different consistencies. J Endod 20:436-439, 1994 https://doi.org/10.1016/S0099-2399(06)80033-6
  15. Dalat DM, Spangberg LSW. Comparison of apical leakage in root canals obturated with various gutta-percha techniques using dye vacuum tracing method. J Endod 20:315-319, 1994 https://doi.org/10.1016/S0099-2399(06)80092-0
  16. Green D. Morphology of the pulp cavity of permanent teeth. Oral Surgery, Oral Med Oral Pathol 8:743-759, 1955 https://doi.org/10.1016/0030-4220(55)90039-6
  17. Jeffrey IWM, Saunders WP, Thomas GE. An investigation into the movement of sealer during placement of gutta-percha points. Int Endod J 19:21-28, 1986 https://doi.org/10.1111/j.1365-2591.1986.tb00886.x
  18. Wu M-K, Ozok A.R. & Wesselink P.R. Sealer distribution in root canals obturated by three techniques. Int Endod J 33:340-345, 2000 https://doi.org/10.1046/j.1365-2591.2000.00309.x

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