Search Results

You are looking at 1 - 10 of 129 items for :

  • "heterotopic ossification" x
Clear All
Free access

Nai-Feng Tian, Ai-Min Wu, Li-Jun Wu, Xin-Lei Wu, Yao-Sen Wu, Xiao-Lei Zhang, Hua-Zi Xu and Yong-Long Chi

Because ISP devices provide motion-preserving stabilization, they can decrease the risk for adjacent-segment disease. Heterotopic ossification is the presence of bone in soft tissue where bone normally does not exist. 16 It frequently occurs in patients with CNS disorders, multiple injuries, joint arthroplasty, and/or burns. 2 , 7 , 16 Recently, a high prevalence of heterotopic bone formation has also been reported for patients who have undergone spinal total disc arthroplasty. 5 , 10 , 12 , 15 , 17 , 20 Heterotopic ossification can negatively affect patients

Restricted access

İsmail Safaz, Rıdvan Alaca, Serkan Bilgiç and Kamil Yazıcıoğlu

%. 4 The hip joint and the elbow are the most common locations for this condition. Heterotopic ossification commonly occurs at 3 sites around the hip. Anterior HO courses in a plane from the anterior superior iliac spine to the greater trochanter. Inferomedial HO is positioned distally to the hip joint and medially to the femoral shaft. Posterior HO occurs immediately posterior to the femoral head and neck. Occasionally, combined patterns or even localization in the abductor muscle may occur. 4 , 5 In our case, the HO was present posteromedially to the left

Restricted access

Soo Eon Lee, Chun Kee Chung and Tae Ahn Jahng

C ervical total disc replacement is becoming a popular alternative to ACDF in the surgical treatment of degenerative disc disease. 18 The purpose of cervical TDR is to decrease the incidence of adjacent segment disease through motion preservation. 4 Heterotopic ossification is a well-known complication following hip and knee arthroplasties. 10 McAfee et al. 13 have reported that HO occurs during lumbar disc replacement, and they proposed an HO classification system in 2003. There are few reports about HO in patients undergoing cervical TDR, 12 , 14

Restricted access

Jau-Ching Wu, Wen-Cheng Huang, Hsiao-Wen Tsai, Chin-Chu Ko, Li-Yu Fay, Tsung-Hsi Tu, Ching-Lan Wu and Henrich Cheng

Bone Joint Surg Am 81 : 519 – 528 , 1999 12 Leung C , Casey AT , Goffin J , Kehr P , Liebig K , Lind B , : Clinical significance of heterotopic ossification in cervical disc replacement: a prospective multicenter clinical trial . Neurosurgery 57 : 759 – 763 , 2005 13 Matz PG , Pritchard PR , Hadley MN : Anterior cervical approach for the treatment of cervical myelopathy . Neurosurgery 60 : 1 Supp1 1 S64 – S70 , 2007 14 McAfee PC , Cunningham BW , Devine J , Williams E , Yu-Yahiro J : Classification of

Restricted access

Christopher E. Louie, Jennifer Hong and David F. Bauer

tissue characteristics, ability to achieve a watertight closure, and risk of infection are considered when choosing a dural graft. Long-term performance data and comparative studies of the different types of dural grafts are limited. A rare but significant long-term complication of duraplasty is heterotopic ossification (HO) of the dural graft. HO is a process that is thought to arise from the dura and lead to osteoid formation, calcification, and ultimately trabecular bone development in connective tissue and muscle. It is frequently associated with trauma (including

Restricted access

Tsung-Hsi Tu, Jau-Ching Wu, Wen-Cheng Huang, Wan-Yuo Guo, Ching-Lan Wu, Yang-Hsin Shih and Henrich Cheng

arthroplasty was first reported by Parkinson and Sekhon in 2005. 25 Several month later, Bartels and Donk 2 reported 2 other cases of bony fusion after cervical arthroplasty with the Bryan disc. These were the earliest reports that referred to “heterotopic ossification” (HO) after cervical TDR. Still later in 2005, the first prospective, multicenter clinical trial specifically aimed at determining the clinical significance of HO following cervical TDR was reported by Leung and colleagues. 15 The data came from the original Bryan Disc Study by the European Consortium, a

Restricted access

Heterotopic ossification and radiographic adjacent-segment disease after cervical disc arthroplasty

Presented at the 2019 AANS/CNS Joint Section on Disorders of the Spine and Peripheral Nerves

Michael M. H. Yang, Won Hyung A. Ryu, Steven Casha, Stephan DuPlessis, W. Bradley Jacobs and R. John Hurlbert

C ervical disc arthroplasty (CDA) is an accepted alternative to discectomy and fusion in select patients. 12 , 25 , 26 However, progressive postoperative bone formation across the disc space (heterotopic ossification; HO) can occur as an unintended outcome following CDA. 29 High-grade HO reduces movement through the artificial disc and can progress to fuse the segment completely. 13 , 29 McAfee and colleagues classified high-grade HO as grade 3 (reduced segmental range of motion; ROM) and 4 (complete fusion). 13 In a recent meta-analysis by Chen et al., 2

Full access

William Omar Contreras Lopez, Emiliano Neves Vialle, Danilo Costa Barbosa and Luiz Roberto Gomes Vialle

and extraction of the bone mass, which measured 6.5 cm in length ( Fig. 2 right). Histopathological examination reported mature bone tissue, compatible with heterotopic ossification. The patient had fully recovered clinically 2 months after surgery, and follow-up imaging at 1 and 2 years showed no recurrence. In cases of sciatica, without clear clinical and radiological correlation, extraspinal causes should be investigated. 1–4 Author Contributions Conception and design: Lopez, EN Vialle. Acquisition of data: Lopez, EN Vialle. Analysis and interpretation of

Restricted access

Christopher Brenke, Johann Scharf, Kirsten Schmieder and Martin Barth

was 10.4° ± 6.7°, and 2 patients showed signs of fusion (ROM < 2°). Based on lateral radiographs, HO was not present in 56.6% of the patients (Grade 0). Heterotopic ossification Grades 1–3 were present in approximately 13% each, and fusion (Grade 4 HO) was detectable in 4.3%. F ig . 2. Graph showing the motion index for 2 different segments at 3 time points (3 months postop, 12 months postop, and prior to revision). The motion index is calculated by dividing the preoperative with the postoperative ROM (preoperative ROM/postoperative ROM) for the

Restricted access

Tsung-Hsi Tu, Jau-Ching Wu, Wen-Cheng Huang, Ching-Lan Wu, Chin-Chu Ko and Henrich Cheng

arthroplasty remains unclear. As longer follow-up periods are anticipated, there are ensuing concerns about failure to maintain motion of the artificial disc. Heterotopic ossification, ectopic bone formation that might cause osseous fusion, was first reported by Parkinson and Sekhon in 2005. 21 Subsequently, a number of reports have demonstrated the existence of HO and its potential to compromise the functional mobility of cervical arthroplasty. 1 , 15 , 17 , 29 Heterotopic ossification has been identified as one of the major causes of a limited ROM in the index level of