抄録
Bone grafting often is necessary to reconstruct maxillary and mandibular bone defects.Although fresh autogenous bone is the standard by which other materials are judged,the surgical procedure for obtaining autogenous bone requires operative time.Moreover,the quantity of autogenous bone available may be inadequate.To avoid these problems,hydroxyapatite has been popular as an artificial bone due to its excellent biocompatability.We applied multiporous hydroxyapatite block to maxillary and mandibular defects.
Hydroxyapatite blocks were placed within 55 defect sites:30 jaw cysts,12 alveolar cleft or deficient maxilla,and 13 sockets after dental extraction.The patient's ages ranged from 14 to 74 years.
Healing was evaluated by inspection and radiographs.In 28 of the 30 jaw cyst and 9 of the 12 cleft palates cases,the grafted hydroxyapatites were stable one to six months postoperatively.However,complications such as infection or exposure of implant occurred in 9 of the 13 dental extraction cases.The causes of these failures were considered to be mucosal coverage insufficiency and periodontal infection prior to exodontia.
Osseous repair by multiporous hydroxyapatite block showed the usefulness for the treatment of jaw cysts and cleft palate maxillary hypoplasia.
