Tìm thấy 14+ kết quả cho từ khóa "Sagittal alignment"
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Reliabilities of and correlations among five standard methods of assessing the sagittal alignment of the cervical spine. Association of complete uncinate process removal on 2- year assessment of radiologic outcomes: subsidence and sagittal balance in patients receiving one-level anterior cervical discectomy and fusion. Anatomy and clinical significance of the uncinate process and uncovertebral joint: a comprehensive review. The results of anterior interbody fusion of the cervical spine.
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Does spinal fusion to T2, T3, or T4 affects sagittal alignment of the cervical spine in Lenke 1 AIS patients:. Cervical sagittal alignment in adolescent idiopathic scolio- sis patients (Lenke type 1-6). Relationship between cervical sagittal alignment and health-related quality of life in adolescent idiopathic scoliosis. The sagittal alignment of the cervical spine in adolescent idiopathic scoliosis.. Cervical sagittal alignment in idiopathic scoliosis treated by posterior instrumentation.
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Therefore, to clarify the effect of DISH on radiologic parameters related to sagittal alignment, we retrospectively investigated the prevalence of DISH in patients with cervical myelopathy caused by cervical OPLL or cervical spondylosis and compared the sagittal alignment of the spine between those with and without DISH, using propensity score matching.. Patients with a history of spine surgery or injury were excluded.
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Bernhardt M, Bridwell KH ( 1989 ) Segmental analysis of the sagittal plane alignment of the normal thoracic and lumbar spines and thoracolumbar junction. Spine This is a review of the normal sagittal alignment of the spine segment by segment in 102 healthy individuals, indicating that there is a wide range of normal sagittal alignment of the thoracic and lumbar spines.
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First, the relatively small sample size and retrospective nature of the analysis Table 4 Correlation between the sagittal alignment parameters. pre-NT/T1s pre-C2-7 Cobb pre-C2-7 SVA Δ C2-7 Cobb Δ C2-7 SVA. pre-NT/T1s r 1 − 0.515. T1s T1 slope, NT neck tilt, SVA sagittal vertical axis Δ value = follow-up value minus postoperative value. 3 Correlations between pre-NT/T1s and Δ C2-7 Cobb.
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Congenital dysplasia and dislocation of the hip in children and adults. graphic analysis of the sagittal alignment and balance of the spine in asymptomatic subjects. Relationship between spinal sagittal alignment and acetabular coverage: a patient‑matched control study. Sagittal plane considerations and the pelvis in the adult patient. copy in borderline hip dysplasia: beware of the Tonnis angle. The relationship between acetabular retroversion and osteoarthritis of the hip.
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The procedure is usually carried out at the L3 or L2 level depending on the sagittal alignment.. Corrections of more than 40 degrees at one level should be avoided. The closing wedge technique consists of removal of the posterior elements including the pedicles (pedicle subtraction osteotomy. This technique is often combined with a so-called eggshell procedure (i.e., decancellation of the vertebral body .
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Comparative study of spinopelvic sagittal alignment between patients with and without degenerative spondylolisthesis. dylolisthesis in the Fifth Lumbar Vertebra and Radiographic Parameters: A Correlation Analysis
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In addition, the sagittal alignment of the syndesmosis was independent of plantar or dorsiflexion [34]. The rate of syndesmotic malreduction independent of the surgical procedure was comparable to other studies . Based on intra-operative CT findings, the alignment of the fibula in the tibio-fibular incisura could be improved by immediate readjustment in 25.5% [38].
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Fusing too short or excessive kyphotic correction leads to junctional kyphosis as patients with neuromuscular kyphoscoliosis want to drift back to their initial sagittal alignment, placing tremendous forces at the distal end of fixation.. Fixation to the sacrum is a major challenge. More often than not, if the distal level of the fusion exceeds the Cobb angle, it is to address the associated pelvic obliquity.
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It is preferable to achieve sagittal balance with nor- malization of the sagittal alignment but moderating the urge to overcorrect the kyphosis.. Single anterior only spine surgery can be done for specific curve patterns and patients with specific contraindications to posterior surgery, i.e., chronic infected wounds. If combined anterior and posterior surgery is required, the ideal timing of the anterior surgery is still controversial [10].
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The choice of the technique depends on age, cardinal symptoms, coronal balance, sagittal alignment, curve rigidity,. and rigidity of the adjacent spine. Fusion to the sacrum should be avoided whenever possible in young individuals. However, if fusion to the sacrum can- not be avoided, an interbody fusion is mandatory to reduce the risk of non-union.. Aebi M ( 2005 ) The adult scoliosis. Bridwell KH ( 1996 ) Where to stop the fusion distally in adult scoliosis: L 4 , L 5 , or the sacrum?
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A low thoracic kyphosis with an apex close to the thoracolumbar junction has a more significant effect on the sagittal alignment of the spine than a deformity with the apex in the midthoracic area.. In addition, it has not been possible to establish a correlation so far between the amount of postoperative kyphosis correction and the patient’s clinical outcome [31, 56]..
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It is evident that, although posterior reduction and stabilization provides effec- tive restoration of the sagittal alignment, the reduction capability of the intraca- nal bone fragments is distinctly limited . The anterior reconstruc- tion method permits effective decompression of the spinal canal and offers supe- rior mechanical stability compared with the indirect decompression and stabili- zation of posterior instrumentation..
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Sagittal alignment of the spine and pelvis during growth. Boulay C, Tardieu C, Hecquet J, et al. Legaye J, Duval‑Beaupere G, Hecquet J, et al. Vaz G, Roussouly P, Berthonnaud E, et al. Diebo BG, Varghese JJ, Lafage R, et al. Sagittal alignment of the spine:. Frank, Schwab, Ashish, et al. Sudo H, Oda I, Abumi K, et al. Wegmann K, Gundermann S, Siewe J, et al. Karami KJ, Buckenmeyer LE, Kiapour AM, et al.
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However, the influence of global alignment was not investigated, and this study evaluated the effect of global balance (sagittal vertical axis [SVA]) on spinopelvic motion..
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Alignment of the sagittal plane was restored in 17 patients. 10 adult high grade. 14 adult high grade. Particularly the latter aspect is an advantage of the method, as larger structural grafts can be placed without the danger of dural sheath damage or nerve root injury.
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Shaft Alignment Handbook. Shaft Alignment Handbook, John Piotrowski. Shaft Alignment Handbook: Second Edition, Revised and Expanded, John Piotrowski 99. Shaft Alignment Handbook, Third Edition, John Piotrowski. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_000 Final Proof page ii am. CRC Press is an imprint of the. Shaft alignment handbook / John Piotrowski. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_000 Final Proof page v am.
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Shaft Alignment Measuring Tools. 6.15 Dial Indicator Shaft Alignment System Manufacturers. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_000 Final Proof page xviii am. 9.1 What Exactly Is Shaft Alignment. Piotrowski / Shaft Alignment Handbook, Third Edition DK4322_000 Final Proof page xix am. Chapter 15 Electronic and Electro-Optical Shaft Alignment Systems.
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Since there are a wide variety of different alignment techniques taught in this book, one field alignment job is not going to be sufficient to learn every method. On the average, it usually takes 2–5 y for someone to become proficient at machinery alignment assuming they encounter alignment tasks about once a month.. Tasks: Obtain relevant information on the equipment being aligned. Are there any special tools needed to measure the alignment or reposition the machines?