Development of the mandibular reconstruction titanium nitride plate and screw system (OHARA^®) and aclinical evaluation

Abstract

In the past 7 years from September 1984 to September 1991, reconstruction using OHARA® titanium plate system for mandibular defects, was carried out on 15 patients. Patients, 8 male and 7 female, ranged between 10 to 73 years of age.
They were histopathologically classified as 5 malignant tumor, 4 benign tumor, 3 osteomyelitis and 3 others cases.
Operations were performed in 8 cases of segmental resection of the mandible, 7 cases of hemimandibulectomy of the mandible, which were performed in 14 cases of immediate reconstruction for defects and 1 case of secondary reconstruction for defects.Kinds of used titanium-nitride plate were 7 cases of condyle type, 2 cases of angle type, 4 cases of body type, and 2 cases of straight type, which were used only titanium-nitride reconstruction plate in 10 patients, titanium-nitride plate with bone graft in 5 patients and titanium-nitride plate with the subcutaneous flap in 2 patients.
In the clinical course after reconstruction, there were 7 years as the longest and 2 years as the shortest.Recently, it has not been noticed that it is necessary to eliminate the titanium-nitride plate in 13 patients except for 2 patients who died due to another disease.
On the other hand, patients are wearing partial dentures in 8 cases and full dentures in 7 cases by prosthetic treatment.