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https://www.readbyqxmd.com/read/29156321/postural-changes-in-orthodontic-patients-treated-with-clear-aligners-a-rasterstereographic-study
#1
Simone Parrini, Benedetta Comba, Gabriele Rossini, Serena Ravera, Giovanni Cugliari, Ilaria De Giorgi, Andrea Deregibus, Tommaso Castroflorio
BACKGROUND: Correlation between malocclusions and body posture has been discussed in the last decades, but there is still a lack of consensus in existing literature. Rasterstereography allows tridimensional reconstruction of the spine, starting from the back surface analysis. So far studies which tested modifications of rasterstereographic parameters during orthodontic treatment, comparing with those obtained from untreated control group, are not available. Clear aligner treatment produces alteration of vertical height due to the occlusal coverage and, subsequently, a stimulation of periodontal receptors which causes an inhibition of the jaw closing muscles and, hypothetically, changes in mandibular posture...
November 14, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/29145042/relationship-of-t1-slope-with-loss-of-lordosis-and-surgical-outcomes-after-laminoplasty-for-cervical-ossification-of-the-posterior-longitudinal-ligament
#2
Masashi Miyazaki, Toshinobu Ishihara, Naoki Notani, Shozo Kanezaki, Hiroshi Tsumura
OBJECTIVE: T1 slope (T1S) has emerged as a predictor of kyphotic alignment change after laminoplasty. Although it was reported that patients with cervical ossification of the posterior longitudinal ligament (OPLL) and higher T1S had more pronounced lordotic curvature before surgery and higher loss of cervical lordosis after surgery, few studies have attempted to correlate these findings with clinical outcomes. We aimed to investigate the relationship of T1S with loss of cervical lordosis and surgical outcomes after laminoplasty for cervical OPLL...
November 13, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29137014/radiological-manifestations-and-surgical-outcome-of-combined-upper-cervical-cord-compression-and-cervical-ossification-of-the-posterior-longitudinal-ligament-with-a-minimum-2-year-follow-up
#3
Hao Li, Xiaopeng Zhou, Gang Chen, Fangcai Li, Junfeng Zhu, Qixin Chen
Combined upper cervical cord compression associated with cervical ossification of the posterior longitudinal ligament (OPLL) is a rare and under-recognized disorder. The aim of this study was to investigate the radiological manifestations and surgical outcome of this combined disease.Between May 2011 and July 2015, patients who underwent surgery for combined upper cervical cord compression and cervical OPLL in our institution were included in this study. After a minimum 2-year follow-up, radiological and clinical data were collected...
November 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29112006/modified-lumbosacral-angle-and-modified-pelvic-incidence-as-new-parameters-for-management-of-pediatric-high-grade-spondylolisthesis
#4
Zhenjiang Ma, Changqing Zhao, Kai Zhang, Lin Du, Jianping Tian, Xiaojiang Sun, Jie Zhao
STUDY DESIGN: Retrospective clinical study. OBJECTIVE: We aimed to introduce new parameters that can better describe the pelvic morphology and lumbosacral segmental deformity in children with high-grade spondylolisthesis of the L5 vertebra: modified pelvic incidence (mPI) and modified lumbosacral angle (mLSA). Also, we aimed to establish the mLSA as a convenient, reliable measurement method and criteria to evaluate the reduction of L5 vertebral slippage. SUMMARY OF BACKGROUND DATA: Numerous parameters and methods exist to evaluate segmental deformity and reduction of L5 vertebral slippage, but no definitive standard for accurately and conveniently describing lumbosacral kyphosis and degree of reduction exists...
November 3, 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/29095412/cervical-sagittal-range-of-motion-as-a-predictor-of-symptom-severity-in-cervical-spondylotic-myelopathy
#5
Kristen J Nicholson, Paul W Millhouse, Emily Pflug, Barrett Woods, Gregory D Schroeder, D Greg Anderson, Alan S Hilibrand, Christopher K Kepler, Mark F Kurd, Jeffrey A Rihn, Alexander Vaccaro, Kris E Radcliff
STUDY DESIGN: Retrospective review of radiographic data and functional outcomes. OBJECTIVE: Evaluate whether myelopathy symptom severity upon presentation corresponds to sagittal plane alignment or non-myelopathy symptoms, such as pain, in patients with cervical spondylotic myelopathy (CSM). SUMMARY OF BACKGROUND DATA: Cervical sagittal balance is an important parameter in the outcome of surgical reconstruction. However, the effect of sagittal alignment on symptom severity in patients who have not undergone spine surgery is not well defined...
October 31, 2017: Spine
https://www.readbyqxmd.com/read/29089564/prognostic-value-of-lordosis-decrease-in-radiographic-adjacent-segment-pathology-after-anterior-cervical-corpectomy-and-fusion
#6
Yin Liu, Na Li, Wei Wei, Jing Deng, Yuequn Hu, Bin Ye, Wei Wang
While cervical lordosis alteration is not uncommon after anterior cervical arthrodesis, its influence on radiological adjacent segment pathology (RASP) is still unclear. Biomechanical changes induced by arthrodesis may contribute to ASP onset. To investigate the correlation between cervical lordosis decrease and RASP onset after anterior cervical corpectomy and fusion (ACCF) and to determine its biomechanical effect on adjacent segments after surgery, 80 CSM patients treated with ACCF were retrospectively studied, and a baseline finite element model of the cervical spine as well as post-operation models with normal and decreased lordosis were established and validated...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29055221/cage-with-anterior-plating-is-advantageous-over-the-stand-alone-cage-for-segmental-lordosis-in-the-treatment-of-two-level-cervical-degenerative-spondylopathy-a-retrospective-study
#7
Paolo Perrini, Federico Cagnazzo, Nicola Benedetto, Riccardo Morganti, Carlo Gambacciani
OBJECTIVES: To compare retrospectively the clinical and radiological outcomes in cervical spinal alignment after two consecutive levels PEEK cage-assisted ACDF when performed with or without plate fixation PATIENTS AND METHODS: Seventy-eight patients underwent two consecutive levels PEEK cage-assisted ACDF without plating (56 patients) or supplemented with plating (22 patients). The average clinical follow-up was 31.40±12.98months. The authors compared clinical parameters (Neck disability index and Robinson criteria), perioperative parameters (hospital stays, complications), and radiological parameters (global lordotic curvature, segmental lordosis, segmental height)...
October 16, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/29054553/long-term-results-of-a-prospective-study-of-anterior-decompression-with-fusion-and-posterior-decompression-with-laminoplasty-for-treatment-of-cervical-spondylotic-myelopathy
#8
Takashi Hirai, Toshitaka Yoshii, Kenichiro Sakai, Hiroyuki Inose, Tsuyoshi Yamada, Tsuyoshi Kato, Shigenori Kawabata, Yoshiyasu Arai, Kenichi Shinomiya, Atsushi Okawa
BACKGROUND: There have been no prospective studies comparing anterior surgery and posterior method in terms of long-term outcomes. The purposes of this study is to clarify whether there is any difference in long-term clinical and radiologic outcomes of anterior decompression with fusion (ADF) and laminoplasty (LAMP) for the treatment of cervical spondylotic myelopathy (CSM). METHODS: Ninety-five patients were prospectively treated with ADF or LAMP for CSM in our hospital from 1996 through 2003...
October 17, 2017: Journal of Orthopaedic Science: Official Journal of the Japanese Orthopaedic Association
https://www.readbyqxmd.com/read/29021674/the-efficacy-of-sagittal-cervical-spine-subtyping-investigating-radiological-classification-methods-within-150-asymptomatic-participants
#9
Lee Daffin, Max C Stuelcken, Mark G L Sayers
AIMS: The aim of this study is to (1) compare and contrast cervical subtype classification methods within an asymptomatic population, and (2) identify inter-methodological consistencies and describe examples of inconsistencies that have the potential to affect subtype classification and clinical decision-making. METHODS: A total of 150 asymptomatic 18-30-year-old participants met the strict inclusion criteria. An erect neutral lateral radiograph was obtained using standard procedures...
July 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29017106/surgical-outcomes-after-laminoplasty-for-cervical-spondylotic-myelopathy-a-focus-on-the-dynamic-factors-and-signal-intensity-changes-in-the-intramedullary-spinal-cord-on-mri
#10
Masashi Miyazaki, Naoki Notani, Toshinobu Ishihara, Shozo Kanezaki, Hiroshi Tsumura
OBJECTIVE: We aimed to analyze the relationship between the dynamic factors and signal intensity changes in the intramedullary spinal cord on MRI, and surgical outcomes, following double-door laminoplasty for cervical spondylotic myelopathy (CSM). PATIENTS AND METHODS: This retrospective study included 100 consecutive patients who underwent double-door laminoplasty for CSM. The following factors were analyzed: JOA score recovery rate, age, duration from onset to surgery, intraoperative bleeding, signal intensity changes in the intramedullary spinal cord on MRI, pre and postoperative C2-7 lordotic angle (LA), changes in C2-7 LA, pre and postoperative C2-7 range of motion (ROM), and pre and postoperative segmental ROM...
November 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28960160/overpowering-posterior-lumbar-instrumentation-and-fusion-with-hyperlordotic-anterior-lumbar-interbody-cages-followed-by-posterior-revision-a-preliminary-feasibility-study
#11
Abhijeet Kadam, Nathan Wigner, Philip Saville, Vincent Arlet
OBJECTIVE The authors' aim in this study was to evaluate whether sagittal plane correction can be obtained from the front by overpowering previous posterior instrumentation and/or fusion with hyperlordotic anterior lumbar interbody fusion (ALIF) cages in patients undergoing revision surgery for degenerative spinal conditions and/or spinal deformities. METHODS The authors report their experience with the application of hyperlordotic cages at 36 lumbar levels for ALIFs in a series of 20 patients who underwent revision spinal surgery at a single institution...
September 29, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28885125/risk-factor-analysis-of-kyphotic-malalignment-after-cervical-intramedullary-tumor-resection-in-adults
#12
Satoshi Nori, Akio Iwanami, Akimasa Yasuda, Narihito Nagoshi, Nobuyuki Fujita, Tomohiro Hikata, Mitsuru Yagi, Takashi Tsuji, Kota Watanabe, Suketaka Momoshima, Morio Matsumoto, Masaya Nakamura, Ken Ishii
OBJECTIVE A number of studies have reported that surgery for cervical intramedullary tumors via the posterior approach can result in postoperative sagittal malalignment of the cervical spine; however, the risk factors remain unclear. The purpose of this study was to investigate the changes in cervical spinal alignment after surgery for cervical intramedullary tumors in adults and to elucidate the risk factors for cervical spinal sagittal misalignment. METHODS Data for the period from April 2001 to December 2011 for all adults who had undergone surgery for cervical intramedullary spinal cord tumors at a single institution were retrospectively analyzed to determine the postoperative changes in cervical spine alignment...
November 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/28881121/the-predictable-factors-of-the-postoperative-kyphotic-change-of-sagittal-alignment-of-the-cervical-spine-after-the-laminoplasty
#13
Jun Seok Lee, Dong Wuk Son, Su Hun Lee, Dong Ha Kim, Sang Weon Lee, Geun Sung Song
OBJECTIVE: Laminoplasty is an effective surgical method for treating cervical degenerative disease. However, postoperative complications such as kyphosis, restriction of neck motion, and instability are often reported. Despite sufficient preoperative lordosis, this procedure often aggravates the lordotic curve of the cervical spine and straightens cervical alignment. Hence, it is important to examine preoperative risk factors associated with postoperative kyphotic alignment changes. Our study aimed to investigate preoperative radiologic parameters associated with kyphotic deformity post laminoplasty...
September 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28840349/sagittal-spino-pelvic-alignment-in-rapidly-destructive-coxarthrosis
#14
Tadatsugu Morimoto, Masaru Kitajima, Masatsugu Tsukamoto, Tomohito Yoshihara, Motoki Sonohata, Masaaki Mawatari
PURPOSE: To investigate the sagittal spino-pelvic alignment (SSPA) in patients with rapidly destructive coxarthrosis (RDC). METHODS: SSPA was investigated in 44 patients with RDC and 70 patients with hip osteoarthritis (HOA). The study included only female patients over the age of 70 years because epidemiological reports indicate that RDC most commonly occurs in this group of patients. The SSPA parameters that were analyzed included lumbar lordosis (LL), lumbar range of motion (ΔLL), sacral slope (SS), pelvic incidence (PI), and pelvic tilt (PT)...
August 24, 2017: European Spine Journal
https://www.readbyqxmd.com/read/28830044/postural-orientation-and-standing-postural-alignment-in-ambulant-children-with-bilateral-cerebral-palsy
#15
Małgorzata Domagalska-Szopa, Andrzej Szopa
BACKGROUND: Standing postural alignment in children with cerebral palsy is usually altered by central postural control disorders. The primary aim of this study is to describe body alignment in a quiet standing position in ambulatory children with bilateral cerebral palsy compared with children with typical development. METHODS: Fifty-eight children with bilateral cerebral palsy (aged 7-13years) and 45 age-matched children with typical development underwent a surface topography examination based on Moiré topography and were classified according to their sagittal postural profiles...
August 16, 2017: Clinical Biomechanics
https://www.readbyqxmd.com/read/28808601/high-posterior-cervical-fusion-rates-with-iliac-autograft-and-nanoss-bone-marrow-aspirate
#16
Nancy E Epstein
BACKGROUND: Patients with severe cervical multilevel stenosis and an adequate lordotic curvature often undergo multilevel laminectomies with posterior instrumented fusions. Although the "gold standard" for the fusion mass remains iliac crest autograft, many require additional volume provided by bone graft expanders. Here, we studied the fusion rates for 32 patients undergoing multilevel cervical laminectomy and vertex/rod/eyelet/titanium cable fusions utilizing lamina/iliac autograft and the bone graft expander Nanoss (RTI Surgical, Alachua, FL, USA) with autogenous bone marrow aspirate (BMA)...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28796062/usefulness-of-anterior-cervical-fusion-using-titanium-interbody-cage-for-treatment-of-cervical-degenerative-disease-with-preoperative-segmental-kyphosis
#17
Kunihiko Hosoi, Hitoshi Tonomura, Ryota Takatori, Masateru Nagae, Yasuo Mikami, Toru Osawa, Yuji Arai, Hiroyoshi Fujiwara, Toshikazu Kubo
Favorable bone fusion and clinical results have been reported for anterior cervical fusion (ACF) using titanium interbody cage (TIC). This method might induce postoperative subsidence and local kyphosis, but the relationship between radiological changes and preoperative local alignment is not known. The purpose of the present study is to investigate the impact of preoperative local alignment on the clinical and radiological outcomes of ACF using TIC.The study enrolled 36 patients (mean age 49.8 years) who underwent single-level ACF using TIC for cervical degenerative diseases...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28767627/muscle-preserving-selective-laminectomy-maintained-the-compensatory-mechanism-of-cervical-lordosis-after-surgery
#18
Satoshi Nori, Tateru Shiraishi, Ryoma Aoyama, Ken Ninomiya, Junichi Yamane, Kazuya Kitamura, Seiji Ueda
STUDY DESIGN: A retrospective single-center study. OBJECTIVE: To evaluate the compensatory mechanism of cervical lordosis (CL), the changes in cervical sagittal alignment and range of motion (ROM) after muscle-preserving selective laminectomy (SL). SUMMARY OF BACKGROUND DATA: CL increases as a compensatory mechanism for the adjustment of cervical sagittal balance or horizontal gaze. However, laminoplasty invades this mechanism and causes kyphosis in higher T1 (C7) slope patients...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28767624/can-c7-slope-substitute-the-t1-slope-an-analysis-using-cervical-radiographs-and-kinematic-mris
#19
Koji Tamai, Zorica Buser, Permsak Paholpak, Kittipong Seesumpun, Hiroaki Nakamura, Jeffrey C Wang
STUDY DESIGN: Retrospective analysis of consecutive 45 radiographs and 120 kinematic magnetic resonance images (kMRI) OBJECTIVE.: The aim was to assess the visibility of C7 and T1 endplates on radiographs, and to verify the correlation between C7 or T1 slope and cervical balance parameters using kMRI. SUMMARY OF BACKGROUND DATA: Because the T1 slope is not always visible due to the anatomical interference, several studies have used C7 slope instead of T1. However, it is still unclear whether the C7 endplate is more visible on radiographs than T1, and if C7 slope has similarity with T1 slope...
August 1, 2017: Spine
https://www.readbyqxmd.com/read/28766019/a-retrospective-imaging-study-of-surgical-outcomes-and-range-of-motion-in-patients-with-cervical-ossification-of-the-posterior-longitudinal-ligament
#20
Shunsuke Kanbara, Shiro Imagama, Keigo Ito, Kenyu Ito, Naoki Ishiguro, Fumihiko Kato
PURPOSE: The K line was introduced in a previous study, but did not include the cervical range of motion (ROM) as a parameter for evaluating surgical outcomes for patients with cervical ossification of the posterior longitudinal ligament (OPLL), and few reports have used both the K line and X-ray evaluations of the cervical ROM to describe the surgical outcomes in such patients. METHODS: Double-door C2-C7 or C3-C7 laminoplasty was performed in 100 patients with cervical OPLL who were classified according to the K line [86 patients, K line (+) and 14 patients, K line (-)]...
August 1, 2017: European Spine Journal
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