caa a22 4500 445831766 CHVBK 20180317145317.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s00586-011-1724-7 doi (NATIONALLICENCE)springer-10.1007/s00586-011-1724-7 Long-term results of double-door laminoplasty using hydroxyapatite spacers in patients with compressive cervical myelopathy [Elektronische Daten] [Atsushi Kimura, Atsushi Seichi, Hirokazu Inoue, Yuichi Hoshino] No previous studies have reported 10-year follow-up results for double-door laminoplasty using hydroxyapatite (HA) spacers. The purpose of this study was therefore to explore the long-term results of double-door laminoplasty using HA spacers and to determine if non-union or breakage of HA spacers is related to restenosis of the enlarged cervical canal. The study group consisted of 68 patients with a minimum of 10years of follow-up after double-door laminoplasty using HA spacers. The average postoperative Japanese Orthopaedic Association score improved significantly after surgery and was maintained until the final follow-up. The average range of motion decreased by 42.6% in patients with cervical spondylotic myelopathy (CSM) and 65.8% in patients with ossification of the posterior longitudinal ligament (OPLL). The enlarged cervical canal area was preserved almost until the final follow-up. The average non-union rates of HA spacers were 21% in CSM and 17% in OPLL, and the average breakage rates were 24 in CSM and 21% in OPLL at the final follow-up. Although non-union and breakage of HA spacers were common, neither of these factors were correlated with restenosis of the enlarged cervical canal. Springer-Verlag, 2011 Cervical myelopathy nationallicence Double-door laminoplasty nationallicence Hydroxyapatite spacer nationallicence Long-term outcome nationallicence Kimura Atsushi Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut Seichi Atsushi Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut Inoue Hirokazu Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut Hoshino Yuichi Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut European Spine Journal Springer-Verlag 20/9(2011-09-01), 1560-1566 0940-6719 20:9<1560 2011 20 586 https://doi.org/10.1007/s00586-011-1724-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00586-011-1724-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kimura Atsushi Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut NATIONALLICENCE 700 1- Seichi Atsushi Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut NATIONALLICENCE 700 1- Inoue Hirokazu Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut NATIONALLICENCE 700 1- Hoshino Yuichi Department of Orthopaedics, Jichi Medical University, 3311-1 Yakushiji, 329-0498, Shimotsuke, Tochigi, Japan aut NATIONALLICENCE 773 0- European Spine Journal Springer-Verlag 20/9(2011-09-01), 1560-1566 0940-6719 20:9<1560 2011 20 586 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer