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. 2013 Oct;4(2):105–115. doi: 10.1055/s-0033-1357361

Table 1. Studies comparing open door with French door cervical laminoplasty: characteristics of included studies.

Investigator
Study design
CoE		 Demographicsa Diagnosis Open door laminoplastyb French door laminoplasty Follow-up
(% followed up)		 Reported outcomes Post-op care (collar, orthosis, mobilization)
Okada et al6
RCT
CoE: II

  • N = 40

  • Age (mean): 61 y (31–79)

  • Male: 66%

  • CSM (n = 21), OPLL (n = 13), or CDH (n = 1)

  • Symptom duration (mean): NR

  • Expansive open door (n = 20)

  • Treated levels: various, between C2 dome–C7

  • French door (n = 20)

  • Treated levels: various, between C1–Th1

  • Spinous process and extensor muscles reattached

 26.9 months (87.5)

  • Perioperative complications

  • JOA score

  • JOA recovery rate

  • Axial pain (VAS)

  • SF-36

  • C2–C7 angle

 NR
Yue et al7
Retrospective cohort
CoE: III

  • N = 43

  • Age (mean): 57.1 y (29–77)

  • Male: 89%

  • Cervical spondylosis (n = 27), OPLL (n = 4), cervical prolapsed intervetebral discs (n = 4), posttraumatic (n = 1), or spinal stenosis post Cloward procedure (n = 1)

  • Symptom duration (mean): 5 mo (1–120)

  • Open door (n = 12)

  • Most common treated levels: C3–C7

  • French door (n = 25)

  • Most common treated levels: C3–C7

 32.1 mo (12–60) (86)

  • JOA

  • JOA recovery rate

  • Complications

 NR
Naito et al8
Retrospective cohort
CoE: III

  • N = 86

  • Age (mean): 62 y (41–77)

  • Male: 77%

  • CSM (n = 48), OPLL (n = 26), traumatic lesions (n = 5), tumor/miscellaneous lesions (n = 4)

  • Symptom duration (mean): NR

  • Open door (n = 35)

  • Additional simultaneous staged anterior cervical fusion due to preexisting subluxation or instability (n = 11 for open door and Z-plasty groups)

  • Treated levels: various, between C1–T1, most common levels C3–C6/7; ≥ 3 levels in each patient

  • French door with iliac bone graft spacer (n = 29)

  • Additional simultaneous posterior fusion due to preexisting subluxation or instability (n = 13)

  • Treated levels: various, between C1–T1, most common levels C3–C6/7; ≥ 3 levels in each patient

 60.1 months (29–88) (97)

  • JOA recovery rate

  • Complications

 Bed rest for 1 wk, then patient allowed to stand and walk wearing Philadelphia color or Somi brace for 12–16 weeks

Abbreviations: CDH, cervical disc herniation; CoE, class of evidence; CSM, cervical spondylotic myelopathy; JOA, Japanese Orthopedic Association score; NR, not reported; OPLL, ossification of posterior longitudinal ligament; RCT, randomized controlled trial.

a

Demographics reflect the number of patients after loss to follow-up (n = 35)6 and (n = 37),7 or included in analysis (n = 83).8

b

Study also included a third intervention group, Z-plasty (n = 35).8