Radiostereometry in lumbar spine research

References

• Albrektsson B E, Ryd L, Carlsson L V, Freeman M A, Herberts P, Regner L, Selvik G. The effect of a stem on the tibial component of knee arthroplasty. A roentgen stereophotogrammetric study of uncemented tibial components in the Freeman-Samuelson knee arthroplasty. J Bone Joint Surg (Br) 1990; 72: 252–8
   PubMedGoogle Scholar
• Axelsson P, Johnsson R, Strömqvist B. Effect of lumbar orthosis on intervertebral mobility. A roentgen stereophotogrammetric analysis. Spine 1992; 17: 678–81
   PubMed Web of Science ®Google Scholar
• Axelsson P, Johnsson R, Strömqvist B. Lumbar orthosis with unilateral hip immobilization. Effect on intervertebral mobility determined by roentgen stereophotogrammetric analysis. Spine 1993; 18: 876–9
   PubMed Web of Science ®Google Scholar
• Axelsson P, Johnsson R, Strömqvist B. Mechanics of the external fixation test in the lumbar spine. A roentgen stereophotogrammetric analysis. Spine 1996; 21: 330–3
   PubMed Web of Science ®Google Scholar
• Axelsson P, Johnsson R, Strömqvist B. The spondylolytic vertebra and its adjacent segment. Mobility measured before and after posterolateral fusion. Spine 1997; 22: 414–7
   PubMed Web of Science ®Google Scholar
• Axelsson P, Johnsson R, Strömqvist B. Is there increased intervertebral mobility in isthmic adult spondylolisthesis? A matched comparative study using roentgen stereophotogrammetry. Spine 2000; 25: 1701–3
   PubMed Web of Science ®Google Scholar
• Axelsson P, Johnsson R, Strömqvist B, Andréasson H. Temporary external pedicular fixation versus definitive bony fusion: a prospective comparative study on pain relief and function. Eur Spine J 2003; 12: 41–7
   PubMed Web of Science ®Google Scholar
• Axelsson P, Johnsson R, Strömqvist B, Arvidsson M, Herrlin K. Posterolateral lumbar fusion. Outcome of 71 consecutive operations after 4 (2–7) years. Acta Orthop Scand 1994; 65: 309–14
   PubMed Web of Science ®Google Scholar
• Axelsson P, Karlsson B S. Intervertebral mobility in the progressive degenerative process. A radiostereometric analysis. Eur Spine J 2004; 13: 567–72
   PubMed Web of Science ®Google Scholar
• Axelsson P, Karlsson B S. Standardized provocation of lumbar spine mobility. Three methods compared by radiostereometric analysis. Spine 2005; 30: 792–7
   PubMed Web of Science ®Google Scholar
• Baldursson H, Hansson L I, Olsson T H, Selvik G. Migration of the acetabular socket after total hip replacement determined by roentgen-stereophotogrammetry. Acta Orthop Scand 1980; 51: 535–40
   PubMed Web of Science ®Google Scholar
• Barnes B, Boden S D, Louis-Ugbo J, Tomak P R, Park J S, Park M S, Minamide A. Lower dose of rhBMP-2 achieves spine fusion when combined with an osteoconductive bulking agent in non-human primates. Spine 2005; 30: 1127–33
   PubMed Web of Science ®Google Scholar
• Bednar D A, Raducan V. External spinal skeletal fixation in the management of back pain. Clin Orthop. 1996; 322: 131–9
   Google Scholar
• Boden S D, Schimandle J H, Hutton W C. Lumbar intertrans-verse-process spinal arthrodesis with use of a bovine bone-derivated osteoinductive protein. A preliminary report. J Bone Joint Surg (Am) 1995; 77A: 1404–17
   Google Scholar
• Boden S D, Kang J, Sandhu H, Heller J G. Use of recombinant human bone morphogenetic protein-2 to achieve posterolateral lumbar spine fusion in humans: a prospective, randomized clinical pilot trial: 2002 Volvo Award in clinical studies. Spine 2002; 27: 2662–73
   PubMed Web of Science ®Google Scholar
• Brox J I, Sorensen R, Friis A, Nygaard O, Indahl A, Keller A, Ingebrigtsen T, Eriksen H R, Holm I, Koller A K, Riise R, Reikeras O. Randomized clinical trial of lumbar instrumented fusion and cognitive intervention and exercises in patients with chronic low back pain and disc degeneration. Spine 2003; 28: 1913–21
   PubMed Web of Science ®Google Scholar
• Bylander B, Hansson L I, Selvik G. Pattern of growth retardation after Blount stapling: a roentgen stereophotogrammetric analysis. J Pediatr Orthop. 1983; 3: 63–72
   Google Scholar
• Connolly P J, Grob D. Controversy. Bracing of patients after fusion for degenerative problems of the lumbar spine – yes or no?. Spine 1998; 23: 1426–8
   PubMed Web of Science ®Google Scholar
• Cook S D, Baffes G C, Wolfe M W, Sampath T K, Rueger D C, Whitecloud TS III. The effect of recombinant human osteogenic protein-1 on healing of large segmental bone defects. J Bone Joint Surg (Am) 1994; 76A: 827–38
   Web of Science ®Google Scholar
• Danielsson B, Frennered K, Irstam L. Roentgenologic assessment of spondylolisthesis. I. A study of measurement variations. Acta Radiol 1988; 29: 345–51
   PubMed Web of Science ®Google Scholar
• Debrunner H U. Das Kyphometer. Z Orthop 1972; 110: 389–92
   PubMed Web of Science ®Google Scholar
• Dekutoski M B, Schemdel M J, Ogilvie J W, Olsewski J M, Wallace L J, Lewis J L. Comparison of in vivo and in vitro adjacent segment motion after lumbar fusion. Spine 1994; 19: 1745–51
   PubMed Web of Science ®Google Scholar
• Egund N, Olsson T H, Scmid H, Selvik G. Movements in the sacroiliac joints demonstrated with roentgen-stereo-photogrammetry. Acta Radiol (Diagn) (Stockh) 1978; 19: 833–46
   PubMedGoogle Scholar
• Ekman P, Möller H, Hedlund R. The long-term effect of posterolateral fusion in adult isthmic spondylolisthesis: a randomized controlled study. Spine J 2005; 5: 36–44
   PubMedGoogle Scholar
• Esses S I, Botsford D J, Kostuik J P. The role of external spinal skeletal fixation in the assessment of low-back disorders. Spine 1989; 14: 594–601
   PubMed Web of Science ®Google Scholar
• Fairbank J, Frost H, Wilson-MacDonald J, Yu L M, Barker K, Collins R;. Spine Stabilisation Trial Group. Randomised controlled trial to compare surgical stabilisation of the lumbar spine with an intensive rehabilitation programme for patients with chronic low back pain: the MRC spine stabilisation trial. BMJ 2005; 330: 1233, Epub May 23
   PubMed Web of Science ®Google Scholar
• Fischgrund J S, Mackay M, Herkowitz H N, Brower R, Montgomery D M, Kurz L T. 1997 Volvo Award winner in clinical studies. Degenerative lumbar spondylolisthesis with spinal stenosis: a prospective, randomized study comparing decompressive laminectomy and arthrodesis with and without spinal instrumentation. Spine 1997; 22: 2807–12
   PubMed Web of Science ®Google Scholar
• Frennered A K, Danielson B I, Nachemson A L, Nordwall A B. Midterm follow-up of young patients fused in situ for spondylolisthesis. Spine 1991; 16: 409–16
   PubMed Web of Science ®Google Scholar
• Friberg O. Lumbar instability: A dynamic approach by traction-compression radiography. Spine 1987; 12: 119–29
   PubMed Web of Science ®Google Scholar
• Fritzell P, Hägg O, Nordwall A. Complications in lumbar fusion surgery for chronic low back pain: comparison of three surgical techniques used in a prospective randomized study. A report from the Swedish Lumbar Spine Study Group. Eur Spine J 2003; 12: 178–89
   PubMed Web of Science ®Google Scholar
• Fritzell P, Hägg O, Wessberg P, Nordwall A. Chronic low back pain and fusion: a comparison of three surgical techniques: a prospective multicenter randomized study from the Swedish Lumbar Spine Study Group. Spine 2002; 27: 1131–41
   PubMed Web of Science ®Google Scholar
• Fritzell P, Hägg O, Wessberg P, Nordwall A. 2001 Volvo Award winner in clinical studies. Lumbar fusion versus nonsurgical treatment for chronic low back pain: a multicenter randomized controlled trial from the Swedish Lumbar Spine Study Group. Spine 2001; 26: 2521–32
   PubMed Web of Science ®Google Scholar
• Frobin W, Brinckmann P, Biggemann M, Tillotson M, Burton K. Precision measurement of disc height, vertebral height and sagittal plane displacement from lateral radiographic views of the lumbar spine. Clin Biomech 1997; 12(Suppl)S1–63
   PubMedGoogle Scholar
• Frobin W, Brinckmann P, Leivseth G, Biggemann M, Reikerås O. Precision measurement of segmental motion from flexion-extension radiographs of the lumbar spine. Clin Biomech 1996; 11: 457–65
   PubMed Web of Science ®Google Scholar
• Frymoyer J W, Selby D K. Segmental instability. Rationale for treatment. Spine 1985; 10: 280–6
   PubMed Web of Science ®Google Scholar
• Gunnarsson G, Axelsson P, Johnsson R, Strömqvist B. A method to evaluate the in vivo behaviour of lumbar spine implants. Eur Spine J 2000; 9: 230–4
   PubMed Web of Science ®Google Scholar
• Halldin K, Zoega B, Nyberg P, Kärrholm J, Lind BI. The effect of standard lumbar discectomy on segmental motion: 5-year follow-up using radiostereometry. Int Orthop 2005; 29: 83–7
   PubMed Web of Science ®Google Scholar
• Hambly M F, Wiltse L L, Raghavan N, Schneiderman G, Koenig C. The transition zone above a lumbosacral fusion. Spine 1998; 23: 1785–92
   PubMed Web of Science ®Google Scholar
• Hanley E N, Matteri R E, Frymoyer J W. Accurate roentgenographic determination of lumbar flexion-extension. Clin Orthop Relat Res 1976, 115: 145–56
   PubMed Web of Science ®Google Scholar
• Harris R I, Wiley J J. Acquired spondylolysis as a sequel to spine fusion. J Bone Joint Surg (Am) 1963; 45: 1159–70
   PubMed Web of Science ®Google Scholar
• Hunter L Y, Braunstein E M, Bailey R W. Radiographic changes following anterior cervical fusion. Spine 1980; 5: 399–401
   PubMed Web of Science ®Google Scholar
• Hägg O, Fritzell P. Nordwall A and the Swedish Lumbar Spine Study Group. Sexual function after surgery for chronic low back pain. Eur Spine J 2003; 12(Suppl 1)S17–S18
   Web of Science ®Google Scholar
• Hägglund G, Bylander B, Hansson L I, Kärrholm J, Selvik G, Svensson K. Longitudinal growth of the distal fibula in children with slipped capital femoral epiphysis. J Pediatr Orthop 1986; 6: 274–7
   PubMed Web of Science ®Google Scholar
• Jackson R K, Boston D A, Edge A J. Lateral mass fusion: A prospective study of a consecutive series with long-term follow-up. Spine 1985; 10: 828–32
   PubMed Web of Science ®Google Scholar
• Jeanneret B, Jovanovic M, Magerl F. Percutaneous diagnostic stabilization for low back pain. Correlation with results after fusion operations. Clin Orthop. 1994; 304: 130–8
   Google Scholar
• Johnsson R, Axelsson P, Branth B, Jönsson B, Strömqvist B, Tullberg T. Interbody stability following anterior lumbar fusion with BAK cages evaluated by RSA. Read at the 26th Annual Meeting of the International Society for the Study of the Lumbar Spine, Kona, Hawaii, 1999a
   Google Scholar
• Johnsson R, Axelsson P, Gunnarsson G, Strömqvist B. Stability of lumbar fusion with transpedicular fixation determined by roentgen stereophotogrammetric analysis. Spine 1999b; 24: 687–90
   PubMed Web of Science ®Google Scholar
• Johnsson R, Axelsson P, Strömqvist B. Posterolateral lumbar fusion using facet joint fixation with biodegradable rods: a pilot study. Eur Spine J 1997; 6: 144–8
   PubMedGoogle Scholar
• Johnsson R, Selvik G, Strömqvist B, Sundén G. Mobility of the lower lumbar spine after posterolateral fusion determined by roentgen stereophotogrammetric analysis. Spine 1990; 15: 347–50
   PubMed Web of Science ®Google Scholar
• Johnsson R, Strömqvist B, Aspenberg P. Randomized radiostereometric study comparing osteogenic protein-1 (BMP-7) and autograft bone in human noninstrumented posterolateral lumbar fusion. Spine 2002; 27: 2654–61
   PubMed Web of Science ®Google Scholar
• Johnsson R, Strömqvist B, Axelsson P, Selvik G. Influence of spinal immobilization on consolidation of posterolateral lumbosacral fusion. A roentgen stereophotogrammetric and radiographic analysis. Spine 1992; 17: 16–21
   PubMed Web of Science ®Google Scholar
• Kirkaldy-Willis W H, Farfan H F. Instability of the lumbar spine. Clin Orthop 1982; 165: 110–23
   PubMed Web of Science ®Google Scholar
• Knutsson F. The instability associated with disk degeneration in the lumbar spine. Acta Radiol 1944; 25: 593–609
   Google Scholar
• Kärrholm J. Roentgen stereophotogrammetry. Review of orthopaedic applications. Acta Orthop Scand 1989; 60: 491–503
   PubMed Web of Science ®Google Scholar
• Kärrholm J, Hansson L I, Selvik G. Roentgen stereophotogrammetric analysis of growth pattern after supinationadduction ankle injuries in children. J Pediatr Orthop 1982; 2: 271–9
   PubMed Web of Science ®Google Scholar
• Lantz S A, Schultz A B. Lumbar spine orthosis wearing. 1. Restriction of gross body motions. Spine 1986; 11: 834–7
   PubMed Web of Science ®Google Scholar
• Lee C K. Accelerated degeneration of the segment adjacent to a lumbar fusion. Spine 1988; 13: 375–7
   PubMed Web of Science ®Google Scholar
• Lee C K, Langrana N A. Lumbosacral spinal fusion. A biomechanical study. Spine 1984; 9: 574–81
   PubMed Web of Science ®Google Scholar
• Leivseth G, Brinckmann P, Frobin W, Johnsson R, Strömqvist B. Assessment of sagittal plane segmental motion in the lumbar spine. A comparison between distortion-com-pensated and stereophotogrammetric Roentgen analysis. Spine 1998; 23: 2648–55
   PubMed Web of Science ®Google Scholar
• Lumsden R M, Morris J M. An in vivo study of axial rotation and immobilization at the lumbosacral joint. J Bone Joint Surg 1968; 50A: 1591–1602
   Google Scholar
• Lund T, Nydegger Schlenzka D, Oxland T R. Three-dimensional motion patterns during active bending in patients with chronic low back pain. Spine 2002; 27: 1865–74
   PubMed Web of Science ®Google Scholar
• Lund T, Rathonyi G, Schlenzka D, Oxland T R. The external spinal fixator does not reduce anterior column motion under axial compressive loads. A mechanical in vitro study. Acta Orthop Scand 1999; 70: 37–41
   PubMed Web of Science ®Google Scholar
• Magerl F P. Stabilization of the lower thoracic and lumbar spine with external skeletal fixation. Clin Orthop 1984; 189: 125–41
   Google Scholar
• Magyar G, Toksvig-Larsen S, Lindstrand A. Changes in osseous correction after proximal tibial osteotomy: radiostereometry of closed- and open-wedge osteotomy in 33 patients. Acta Orthop Scand 1999; 70: 473–7
   PubMed Web of Science ®Google Scholar
• Mjöberg B, Brismar J, Hansson L I, Pettersson H, Selvik G, Önnerfält R. Definition of endoprosthetic loosening. Comparison of arthrography, scintigraphy and roentgenstereophotogrammetry in prosthetic hips. Acta Orthop Scand 1985; 56: 469–73
   PubMed Web of Science ®Google Scholar
• Mjöberg B, Hansson L I, Selvik G. Instability, migration and laxity of total hip prostheses. A roentgen stereophotogrammetric study. Acta Orthop Scand 1984; 55: 141–5
   PubMed Web of Science ®Google Scholar
• Möller H, Hedlund R. Instrumented and noninstrumented posterolateral fusion in adult spondylolisthesis. A prospective randomized study: part 2. Spine 2000; 25: 1716–21
   PubMed Web of Science ®Google Scholar
• Nachemson A L. Orthotic treatment for injuries and diseases of the spinal column. Physical Medicine and Rehabilitation 1987; 1: 11–24
   Google Scholar
• Nilsson K G, Kärrholm J, Ekelund L. Knee motion in total knee arthroplasty. A roentgen stereophotogrammetric analysis of the kinematics of the Tricon-M knee prosthesis. Clin Orthop Rel Res 1990, 256: 147–61
   PubMed Web of Science ®Google Scholar
• Nilsson L T, Geijer M, Neumann P, Lind B. The Brantigan anterior lumbar I/F cage. Two years radiological results. Eur Spine J 2001; 10(Suppl 1)S26
   Google Scholar
• Norton P L, Brown T. The immobilizing efficiency of back braces. Their effect on the posture and motion of the lumbosacral spine. J Bone Joint Surg (Am) 1957; 39: 111–39
   PubMed Web of Science ®Google Scholar
• Olerud S, Sjöström L, Karlström G, Hamberg M. Spontaneous effect of increased stability of the lower lumbar spine in cases of severe chronic back pain. The answer of an external transpeduncular fixation test. Clin Orthop 1986; 203: 67–74
   Google Scholar
• Olsson T H, Selvik G, Willner S. Kinematic analysis of posterolateral fusion in the lumbosacral spine. Acta Radiol (Diagn) (Stockh) 1976a; 17: 519–30
   PubMedGoogle Scholar
• Olsson T H, Selvik G, Willner S. Vertebral motion in spondylolisthesis. Acta Radiol (Diagn) (Stockh) 1976b; 17: 861–8
   PubMedGoogle Scholar
• Olsson T H, Selvik G, Willner S. Postoperative kinematics in structural scoliosis. Acta Radiol (Diagn) (Stockh) 1977; 18: 75–86
   PubMedGoogle Scholar
• Oxland T R, Lund T. Biomechanics of stand-alone cages and cages in combination with posterior fixation: a literature review. Eur Spine J 2000; 9(Suppl 1)S95–S101
   Google Scholar
• Pearcy M J. Stereo radiography of lumbar spine motion. Acta Orthop Scand 1985; 56(Suppl 212)1–45
   PubMedGoogle Scholar
• Peng B, Hao J, Hou S, Wu W, Jiang D, Fu X, Yang Y. Possible pathogenesis of painful intervertebral disc degeneration. Spine 2006; 31: 560–6
   PubMed Web of Science ®Google Scholar
• Pope M H, Hanley E N, Matteri R E, Wilder D G, Frymoyer J W. Measurement of intervertebral disc space height. Spine 1977; 2: 282–6
   Google Scholar
• Rune B, Sarnäs KV, Selvik G, Jacobsson S. Movement of the cleft maxilla in infants relative to the frontal bone. A roentgen-stereophotogrammetric study with the aid of metallic implants. Cleft Palate J 1980; 17: 155–74
   PubMedGoogle Scholar
• Rune B, Sarnäs KV, Selvik G, Jacobsson S. Roentgen-ste-reometry in the study of craniofacial anomalies –the state of the art in Sweden. Br J Orthod 1986; 13: 151–7
   PubMedGoogle Scholar
• Ryd L, Albrektsson B E, Carlsson L, Dansgård F, Herberts P, Lindstrand A, Regner L, Toksvig-Larsen S. Roentgen stereophotogrammetric analysis as a predictor of mechanical loosening of knee prostheses. J Bone Joint Surg (Br) 1995; 77: 377–83
   PubMed Web of Science ®Google Scholar
• Saraste H, Broström LA, Aparisi T, Axdorph G. Radiographic measurement of the lumbar spine. A clinical and experimental study in man. Spine 1985; 10: 236–41
   PubMed Web of Science ®Google Scholar
• Schlegel J D, Smith J A, Schleusener R L. Lumbar motion segment pathology adjacent to thoracolumbar, lumbar, and lumbosacral fusions. Spine 1996; 21: 970–81
   PubMed Web of Science ®Google Scholar
• Schläpfer F, Wörsdörfer O, Magerl F, Perren S M. Stabilization of the lower thoracic and lumbar spine: Comparative in vitro investigation of an external skeletal and various internal fixation devices. Uhthoff HK. Springer Verlag, Berlin 1982; 367–80, Current concepts of external fixation of fractures
   Google Scholar
• Schober P. Lendenwirbelsäule und Kreuzschmerzen. Münch Med Wschr 1937; 84: 336–8
   Google Scholar
• Schwarzer A C, Aprill C N, Derby R, Fortin J, Kine G, Bogduk N. The prevalence and clinical features of internal disc disruption in patients with chronic low back pain. Spine 1995; 20: 1878–83
   PubMed Web of Science ®Google Scholar
• Seitsalo S. Operative and conservative treatment of moderate spondylolisthesis in young patients. J Bone Joint Surg (Br) 1990; 72B: 908–13
   Google Scholar
• Selvik G. Roentgen stereophotogrammetry. A method for the study of the kinematics of the skeletal system. Acta Orthop Scand 1989; 60(Suppl 232)1–51
   PubMedGoogle Scholar
• Selvik G. Roentgen stereophotogrammetry. A method for the study of the kinematics of the skeletal system. University of Lund. 1976, Thesis
   Google Scholar
• Snorrason F, Kärrholm J. Primary migration of fully-threaded acetabular prostheses. A roentgen stereophotogrammetric analysis. J Bone Joint Surg (Br) 1990; 72: 647–52
   PubMedGoogle Scholar
• Soini J, Slätis P, Kannisto M, Sandelin J. External transpedicular fixation test of the lumbar spine correlates with the outcome of subsequent lumbar fusion. Clin Orthop 1993; 293: 89–96
   Google Scholar
• Stauffer R N, Coventry M B. Posterolateral lumbar-spine fusion: Analysis of Mayo clinic series. J Bone Joint Surg 1972; 54A: 1195–1204
   Google Scholar
• Strömqvist B. Posterolateral uninstrumented fusion. Acta Orthop Scand 1993; 64(Suppl 251)97–9
   Google Scholar
• Strömqvist B, Fritzell P, Hägg O. One-year report from the Swedish National Spine Register. Swedish Society of Spinal Surgeons. Acta Orthop 2005; 76(Suppl 319)1–24
   Google Scholar
• Sturesson B, Udén A, Vleeming A. A radiostereometric analysis of movements of the sacroiliac joints during the standing hip flexion test. Spine 2000; 25: 364–8
   PubMed Web of Science ®Google Scholar
• Summers B N, Eisenstein S M. Donor site pain from the ilium. A complication of lumbar spine fusion. J Bone Joint Surg (Br) 1989; 71B: 677
   Google Scholar
• Szypryt E P, Twining P, Mulholland R C, Worthington B S. The prevalence of disc degeneration associated with neural arch defects of the lumbar spine assessed by magnetic resonance imaging. Spine 1989; 14: 977–81
   PubMed Web of Science ®Google Scholar
• Thomsen K, Christensen F B, Eiskjaer S P, Hansen E S, Fruensgaard S, Bunger C E. 1997 Volvo Award winner in clinical studies. The effect of pedicle screw instrumentation on functional outcome and fusion rates in posterolateral lumbar spinal fusion: a prospective, randomized clinical study. Spine 1997; 22: 2813–22
   PubMed Web of Science ®Google Scholar
• Tjörnstrand B, Selvik G, Egund N. Lindstrand A. Roentgenstereophotogrammetry in high tibial osteotomy for gonarthrosis. Arch Orthop Trauma Surg 1981; 99: 73–81
   PubMed Web of Science ®Google Scholar
• Vaccaro A R, Anderson D G, Patel T, Fischgrund J, Truumees E, Herkowitz H N, Phillips F, Hilibrand A, Albert T J, Wetzel T, McCulloch JA. Comparison of OP-1 Putty (rhBMP-7) to iliac crest autograft for posterolateral lumbar arthrodesis: a minimum 2-year follow-up pilot study. Spine 2005a; 30: 2709–16
   PubMed Web of Science ®Google Scholar
• Vaccaro A R, Patel T, Fischgrund J, Anderson D G, Truumees E, Herkowitz H, Phillips F, Hilibrand A, Albert T J. A 2-year follow-up pilot study evaluating the safety and efficacy of OP-1 Putty (rhBMP-7) as an adjunct to iliac crest autograft in posterolateral lumbar fusions. Eur Spine J 2005b; 14: 623–9
   PubMed Web of Science ®Google Scholar
• Vainionpää S, Kilpikari J, Laiho J, Helevirta P, Rokkanen P, Törmälä P. Strength and strength retention in vitro, of absorbable, selfreinforced polyglycolide (PGA) rods for fracture fixation. Biomaterials 1987; 8: 46–8
   PubMed Web of Science ®Google Scholar
• Vishteh A G, Crawford N R, Chamberlain R H, Thramann J J, Park S C, Craigo J B, Sonntag V K.H, Dickman C A. Biomechanical comparison of anterior versus posterior lumbar threaded interbody fusion cages. Spine 2005; 30: 302–10
   PubMed Web of Science ®Google Scholar
• Walheim G G, Selvik G. Mobility of the pubic symphysis. In vivo measurements with an electro-mechanic method and a roentgen-stereophotogrammetric method. Clin Orthop 1984, 191: 129–35
   PubMed Web of Science ®Google Scholar
• Weinhoffer S L, Guyer R D, Herbert M, Griffith S L. Intradiscal pressure measurements above an instrumented fusion. A cadaveric study. Spine 1995; 20: 526–31
   PubMed Web of Science ®Google Scholar
• Whitecloud III TS, Davis J M, Olive P M. Operative treatment of the degenerated segment adjacent to a lumbar fusion. Spine 1994; 19: 531–6
   PubMed Web of Science ®Google Scholar
• Zdeblick T A. A prospective, randomized study of lumbar fusion. Preliminary results. Spine 1993; 18: 983–91
   PubMed Web of Science ®Google Scholar
• Zoega B, Kärrholm J, Lind B. Mobility provocation radiostereometry in anterior cervical spine fusions. Eur Spine J 2003; 12: 631–6
   PubMed Web of Science ®Google Scholar
• Öhlén G. Spinal sagittal configuration and mobility. A kyphometer study. 1989, Thesis, Department of Orthopaedic Surgery, Karolinska Institute, Stockholm
   Google Scholar
• Öhlén G, Spangfort E, Tingvall C. Measurement of spinal sagittal configuration and mobility with Debrunner’s kyphometer. Spine 1989; 14: 580–3
   PubMed Web of Science ®Google Scholar