title: Spinous process-splitting laminoplasty using hydroxyapatite spinous process spacer.
abstract: Between February 1986 and August 1989, 45 patients with cervical myelopathy were treated by spinous process-splitting laminoplasty. Hydroxyapatite intraspinous spacers were used to maintain the enlargement of the cervical spinal canal. The shape of this spacer is trapezoidal. After sagittal splitting of the spinous process, the spacer was inserted between the two halves and affixed with the wire. Histologic study showed there was good fusion between the spacer and bone. In all cases, good enlargement of the cervical spinal canal was achieved. Spacer displacement, wire breakage, and postoperative infection were not seen. There was no postoperative neurologic deterioration. Computed tomography showed that the width of the cervical spinal canal was maintained.
authors.affiliation: Department of Orthopaedic Surgery, Hirosaki University Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Nakano
authors.forename: S
authors.initials: S
authors.lastname: Harata
authors.forename: F
authors.initials: F
authors.lastname: Suetsuna
authors.forename: T
authors.initials: T
authors.lastname: Araki
authors.forename: J
authors.initials: J
authors.lastname: Itoh
mesh_terms: D000818:Animals; D002516:Ceramics; D002574:Cervical Vertebrae / Q000601:surgery*; D004285:Dogs; D017886:Durapatite; D005260:Female; D006801:Humans; D006882:Hydroxyapatites; D008022:Ligaments / Q000473:pathology; D008297:Male; D008875:Middle Aged; D009999:Ossification, Heterotopic / Q000150:complications / Q000601:surgery; D019736:Prostheses and Implants; D013117:Spinal Cord Compression / Q000209:etiology; D013123:Spinal Fusion / Q000295:instrumentation*; D013130:Spinal Stenosis / Q000150:complications / Q000601:surgery
chemical_list: D006882:Hydroxyapatites; D017886:Durapatite