Case Series
Volume 20 Issue 6 - 2021
Simplified Method of Schilder’s Root Canal Technique: A Case Series
Hirotaka Kubokura1,3, Rebecca Tsai2, Shigemi Ishikawa-Nagai1* and Jarshen Lin2
1Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA
2Department of Restorative Dentistry and Biomaterial Sciences, Harvard School of Dental Medicine, Boston, MA, USA
3Keiyukai, Kozukue Dental Practice, Yokohaya, Japan
*Corresponding Author: Shigemi Ishikawa-Nagai, Associate Professor, Director of Clinical Research, Department of Oral Medicine, Infection and Immunity, Harvard School of Dental Medicine, Boston, MA, USA.
Received: April 21, 2021; Published: May 25, 2021


Introduction: The objective of this study was to describe the Kubokura Single Root Canal Therapy (K.SRCT) method which is simplified method of Schilder’s root canal technique and determine the predictability of root canal therapy done using this method.

Methods: The K.SRCT method utilizes a standard canal preparation using simple and inexpensive instruments, a two-step filling process creating an apical pad to ensure a complete seal and entombment of the canal space and a thermoplasticized method of warm vertical compaction. Three cases are presented, showing healing of the periapical bone following non-surgical root canal therapy (NSRCT) of #7 and #10 using the K.SRCT method and healing of the periapical bone and regeneration of the sinus floor following NSRCT of #14 using the K.SRCT method.

The prognosis of 418 cases (167 retreatment cases and 251 initial RCT cases) was analyzed prospectively.

Results: Using the K.SRCT method, 94.4% of retreatment cases demonstrated an improvement in outcome with an average follow-up of 3 years. 95.6% of initial root canal therapy cases done using the K.SRCT method demonstrated an improvement in outcome with an average follow-up of 3 years.

Conclusion: This method allows for predictable root canal outcomes following a streamlined treatment protocol, a necessity under the current Japanese universal healthcare system that requires short chair time and use of inexpensive materials and equipment in order to attain adequate reimbursement.


Keywords: Endodontics; Root Canal Therapy; Retreatment; Japanese Universal Healthcare System


  1. Trope M., et al. “Endodontic treatment of teeth with apical periodontitis: Single vs. Multivisit treatment”. Journal of Endodontics5 (1999): 345-350.
  2. Peters LB and Wesselink PR. “Periapical healing of endodontically treated teeth in one and two visits obturated in the presence or absence of detectable microorganisms”. International Endodontic Journal8 (2002): 660-667.
  3. Sathorn C., et al. “The prevalence of postoperative pain and flare‐up in single‐ and multiple‐visit endodontic treatment: a systematic review”. International Endodontic Journal2 (2008): 91-99.
  5. “AAE Position Statement: Dental Dams”. Journal of Endodontics4 (2011): 570-570.
  6. Torabinejad M. “Passive step-back technique”. Oral Surgery, Oral Medicine, Oral Pathology4 (1994): 402-405.
  7. Yousuf W., et al. “Endodontic Procedural Errors: Frequency, Type of Error and the Most Frequently Treated Tooth”. International Journal of Dentistry (2015): 673914.
  8. Yee FS., et al. “Three-dimensional obturation of the root canal using injection-molded, thermoplasticized dental gutta-percha”. Journal of Endodontics5 (1977): 168-174.
  9. Erdem Hepsenoglu Y., et al. “Postoperative Pain Intensity after Single- versus Two-visit Nonsurgical Endodontic Retreatment: A Randomized Clinical Trial”. Journal of Endodontics9 (2018): 1339-1346.
  10. Law A and Messer H. “An Evidence-Based Analysis of the Antibacterial Effectiveness of Intracanal Medicaments”. Journal of Endodontics10 (2004): 689-694.
  11. Çalt S and Serper A. “Dentinal tubule penetration of root canal sealers after root canal dressing with calcium hydroxide”. Journal of Endodontics6 (1999): 431-433.
  12. Kim SK and Kim YO. “Influence of calcium hydroxide intracanal medication on apical seal”. International Endodontic Journal7 (2002): 623-628.
  13. Kojima K., et al. “Success rate of endodontic treatment of teeth with vital and nonvital pulps. A meta-analysis”. Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology 1 (2004): 95-99.
Citation: Shigemi Ishikawa-Nagai., et al. “Simplified Method of Schilder’s Root Canal Technique: A Case Series”. EC Dental Science 20.6 (2021): 21-29.

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