Table 1 APD increments and expansion ratio after laminoplasty in the literature
Technique | Radiography | Increments or expansion ratio at final follow-up | |
|---|---|---|---|
Hirabayashi [1] 1983 | EL | PLR | Mean increase 3–4 mm |
Hirabayashi [23]1999 | EL | PLR | 4.4 mm |
Chiba [6] 2006 | EL | PLR | 4.4–5.9 mm |
Satomi [2]1994 | EL | PLR | 3.0 mm |
Yang [16] 2007 | Suture anchor fixation | CT | 38.4–54.3% |
Baba [18] 1997 | En bloc | 3D CT | Mean increase 42% |
Baba [23] 1995 | Tomita | CT | 6.8 mm 40% |
O’Brien [8] 1996 | Titanium | ||
Miniplate | CT | 8.4 mm 105% | |
Wang [10] 1998 | Anchor system | PLR | 6.3 mm 64% |
Itoh [19] 1985 | Bone blocks with wire ligatures | PLR | 4.1 mm |
This study | Simple sutures | PLR | 8.01 mm 136.23% |