Kinematic Analysis of Posterolateral Fusion in the Lumbosacral Spine

Olsson, Tord; Selvik, Göran; Willner, Stig

doi:10.1177/028418517601700416

Cited by 12 publications

(8 citation statements)

References 3 publications

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“…Consequently one method of treating these patients has been stabilization, i.e. fusion of the engaged levels of the lumbosacral region (65,66). Thus two cases with a clinical suspicion of incompletely healed anterior fusion between L5 and SI were revealed (65).…”

Section: Applicationsmentioning

confidence: 99%

Roentgen Stereophotogrammetric Analysis

Selvik¹

1990

Acta Radiol

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126

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Soon after Roentgen's discovery, the 'new' rays were used to produce stereoscopic images or used for spatial reconstruction of positions of foreign bodies. However, no systematic use of roentgen stereo measurements seems to have occurred until the 1970's, although many attempts have been made before. Since 1972, a system for roentgen stereophotogrammetry has been in use at the University Hospital in Lund. The system has been named RSA, roentgen stereophotogrammetric analysis. It is a complete system, including instrumentation for implanting tantalum landmarks, devices for calibration of the stereo roentgen set-up, and comprehensive software. Using different calibration set-ups, any part of the body can be investigated under different conditions using standard roentgen equipment. The computer programs make it possible to calculate spatial landmark coordinates from measured film coordinates, and further to calculate growth, and volume changes or kinematic variables in well-defined and generally used terms. After the basic principles have been established, a survey of applications grouped according to anatomic regions follows. Special emphasis is laid on total hip and knee replacement, which besides complex craniofacial and spinal disorders, are the most rewarding fields of study.

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Section: Applicationsmentioning

confidence: 99%

Roentgen Stereophotogrammetric Analysis

Selvik¹

1990

Acta Radiol

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126

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“…In posterolateral fusions (38), it was observed that vertebral motions did not decrease until 5-6 months after successful operations. This suggested that solid fusion is not necessary for pain relief (37)(38)(39)(40). Johnsson and co-workers used RSA to compare osteogenic protein-1 (BMP-7) and autogenous bone graft in lumbar fusion (41).…”

Section: Tibial Plateau Fracturesmentioning

confidence: 99%

“…VERTEBRAL FUSION RSA has been used to study the loss of correction after Harrington fusion of structural scoliosis (37). In posterolateral fusions (38), it was observed that vertebral motions did not decrease until 5-6 months after successful operations. This suggested that solid fusion is not necessary for pain relief (37)(38)(39)(40).…”

Section: Tibial Plateau Fracturesmentioning

confidence: 99%

RSA Applications in Monitoring of Fracture Healing in Clinical Trials

et al. 2006

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Radiostereometric analysis (RSA) was originally developed as a method for performing highly accurate three-dimensional measurements in vivo over time from sequential radiographs. Since its introduction over twenty years ago, the RSA method has proven itself as a powerful tool with numerous orthopaedic applications. RSA has been used extensively in studies of prosthetic fixation and has been shown to be the method of choice for these studies. RSA has, however, also been successfully applied to a limited number of studies examining fracture healing, namely in fractures of the radius, ankle, tibial plateau, trochanter and femoral neck, as well as studies of bone healing following spinal fusion and tibial osteotomies. RSA follow-up of a fracture will provide definitive demonstration of the exact time of union, i.e. the achievement of fracture stability. This information can be invaluable in randomized clinical trials of fracture treatment. Phantom model studies have proven useful for effective preoperative planning and interpretation of RSA results. The RSA method is a highly accurate, precise and safe objective method for studying fracture healing in clinical trials. The RSA method may serve as a scientific tool to accurately evaluate the significance of supporting novel biomaterials for the early stability and the rate of healing in fractures.

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“…New technologies and improved treatment created an urge for more precise mobility measurement. This development may be exemplified by determining the movement between bone, cement and prosthesis in joint arthroplasty (Mjöberg et al 1984, Snorrason and, growth disturbances in childhood (Kärrholm et al 1982, Bylander et al 1983) and, subsequently, healing determination after spinal fusion (Olsson et al 1976a, Johnsson et al 1990). Roentgen stereophotogrammetric analysis (RSA), or radiostereometry which will be the nomenclature used onwards, was primarily introduced by Göran Selvik (1976) and proved to be a new technique for studying the musculoskeletal system with an increased precision.…”

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confidence: 99%

“…In our laboratory we started applying radiostereometry to the lower lumbar spine in the mid 1980s, inspired by the early work by Olsson et al (1976aOlsson et al ( , b, 1977. Through more than 15 years it has been our aim to study lumbosacral kinematics in various lumbar spine disorders, and in relation to surgical procedures and external fixation.…”

mentioning

confidence: 99%