The Application of "Bone Window" Technique in Endodontic Microsurgery

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.

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.