Reconstruction with sliding vertical ramus osteotomy following condylectomy for temporomandibular joint osteochondroma under an intraoperative navigation system: A case report

Osteochondroma of the condyle often causes facial asymmetry, jaw-movement disorders, and malocclusion. We present the case of a 28-year-old man with a 5-year history of gradually increasing facial asymmetry. Clinical examinations and imaging revealed left condylar tumor diagnosed as osteochondroma. Following condylectomy, vertical ramus osteotomy using surgical intraoperative navigation was performed and the condyle was recon-structed by sliding the posterior border of the mandibular ramus into the mandibular fossa. As a result, no gap between proximal and distal bone fragments in the mandibular ramus was achieved. No abnormalities such as malocclusion or deviation during mouth opening were observed in 18 months of postoperative follow-up. Finally, maximum mouth opening without pain was 53 mm. Preoperative simulation is necessary for complex surgeries such as resection and reconstruction of the condyle. Moreover, intraoperative navigation systems can greatly help by reflecting the preoperative simulation of the actual surgery.

Automated summary

Osteochondroma of the condyle can result in facial asymmetry, jaw-movement disorders, and malocclusion. This case report presents a 28-year-old man with gradually increasing facial asymmetry for 5 years. Surgical intraoperative navigation was used to perform condylectomy and vertical ramus osteotomy, achieving satisfactory results.