Successful reconstruction of defective jaw after cancer surgery for cancer patients must be a formidable challenge for a oral and maxillofacial surgeon.

Previous treatment for mandibular cancer mainly focused on a wide surgical excision followed by reconstruction using free flap without functional and facial appearance recovery.

Recently, however, as oral cancers occur not only in older people but also occur in young people from age of 20–30, reconstruction surgery to rebuild surgically removed mandible to previous condition has become very important. Particularly, as dental implant has become popular, increased number of prosthodontic treatment via dental implant are provided to mandibular cancer patients.

However, insufficient height and width of removed mandibles cause many problems in functional recovery by prosthesis with or after implant installation.

Therefore in order to recover the height and width of the mandible, several bone grafts such as iliac graft were performed, but due to the limitation of bone mass sampling, we could not obtain the desired results. On the contrary, DO recovered the height and width of the mandible similar to the previous appearance, and it satisfied the conditions for implant installation.

In our cases, oral reconstruction using free fibular flap reconstruction and DO after surgical excision of mandibular cancer showed a promising result. Especially, prosthetic treatment by PFM after implant installation has recovered previous appearance and function of patients, and patients’ satisfaction was improved. Therefore, we would like to report the case, and speculate on the surgical methods and their results.

Conflict of interest: None declared.