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Related Experiment Video

Updated: Dec 23, 2025

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The Application of "Bone Window" Technique in Endodontic Microsurgery.

Su-Min Lee1, Ya-Hsin Yu1, Yu Wang2

  • 1Department of Endodontics, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania.

Journal of Endodontics
|April 22, 2020
PubMed
Summary

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The bone window technique in endodontic microsurgery preserves bone and aids healing for large periapical lesions. This method minimizes bone loss and acts as an autologous graft, showing successful outcomes in reported cases.

Area of Science:

  • Endodontics
  • Oral Surgery
  • Regenerative Medicine

Background:

  • Large periapical lesions in endodontic microsurgery can require significant bone removal, potentially hindering healing.
  • Preserving cortical bone is crucial for favorable outcomes in root-end surgery.

Purpose of the Study:

  • To evaluate the efficacy of the "bone window" technique in endodontic microsurgery for teeth with large periapical lesions.
  • To assess the bone preservation and healing potential of the bone window method.

Main Methods:

  • The bone window technique was employed in endodontic microsurgery on maxillary and mandibular molars with large periapical lesions.
  • Thin osteotomy instruments were used to fashion a bone window, which was repositioned after surgery.
  • Cone-beam computed tomography (CBCT) was utilized for presurgical assessment and treatment planning.
Keywords:
Bony windowcone beam computed tomographyendodontic microsurgerygraftoutcome assessmentpiezoelectric surgery

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Main Results:

  • The bone window technique provided excellent surgical field exposure while preserving cortical bone.
  • Repositioned bone windows minimized bone loss and served as autologous grafts.
  • Clinical and CBCT follow-ups at 12 and 16 months demonstrated lesion healing without complications.

Conclusions:

  • The bone window technique is a reliable and effective method for endodontic microsurgery involving large periapical lesions.
  • This technique is particularly recommended when lesions are positioned between intact buccal and lingual cortices.
  • It offers a way to minimize bone loss and promote healing without additional grafting materials.