The biomechanical effect and clinical application of a Ni-Ti shape memory expansion clamp.
Study Design: The study involves three phases: a clinical study of 30 patients, a biomechanical study to assess the expansion force of a recovering-shape memory expansion clamp, and a biomechanical study using cadaveric specimens to assess the pullout strength of the shape memory expansion clamp as...
| Published in: | Spine (03622436) Vol. 22; no. 18; pp. 2083 - 2089 |
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| Main Authors: | , , |
| Format: | case study clinical trial research Journal Article |
| Published: |
Lippincott Williams & Wilkins
1997 Sep 15
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| Online Access: | View this record in EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=138084603&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 138084603 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 03622436 1Y6 jtl: Spine (03622436) issn: 03622436 maglogo: N pubinfo: dt: 1997 Sep 15 vid: 22 iid: 18 pid: 433 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 138084603 138084603 NLM9322318 138084603 NLM9322318 138084603 ppf: 2083 ppct: 6 formats: tig: atl: The biomechanical effect and clinical application of a Ni-Ti shape memory expansion clamp. aug: au: Mei, F Ren, X Wang, W affil: Department of Orthopedics, Xinqiao Hospital, Third Military Medical University, Chongqing, China sug: subj: Spinal Fractures Surgery Internal Fixators Cervical Vertebrae Injuries Fracture Fixation Spinal Fractures Human Kinematics Cervical Vertebrae Physiopathology Treatment Outcomes Evaluation Research Female Tomography, X-Ray Computed Adult Cervical Vertebrae Spinal Fractures Physiopathology Middle Age Male Clinical Trials Validation Studies Comparative Studies Multicenter Studies Scales Adult: 19-44 years Middle Aged: 45-64 years Female Male ab: Study Design: The study involves three phases: a clinical study of 30 patients, a biomechanical study to assess the expansion force of a recovering-shape memory expansion clamp, and a biomechanical study using cadaveric specimens to assess the pullout strength of the shape memory expansion clamp as a function of the shape of the clamp.Objective: To evaluate the biomechanical effect and clinical application of the shape memory expansion clamp.Summary Of Background Data: The major complication of anterior cervical decompression and fusion was graft dislodgement and pseudarthrosis. Improvement of the shape of bone graft and fusion technique could not eliminate the problem completely. The authors designed the shape memory expansion clamp by using the characteristic of Ni-Ti shape memory alloy and first applied it in an anterior cervical operation.Methods: The expansion force of recovering of the shape memory expansion clamp was measured in a biomechanical study. Eight fresh human cadaver cervical spine specimens were used to assess the pullout strength of the shape memory expansion clamp as a function of the shape of the clamp. The shape memory expansion clamp had been used to fix rotated circular grafts in 30 cases with cervical spine injuries or cervical spondylosis after anterior decompression.Results: The expansion force of the shape memory expansion clamp in recovery was 4.65-27.96 N, and the pullout strength was 8.82-20.58 N. Bone fusion was achieved in all 30 cases. Dislocation of bone graft, loosening of clamp, or kyphotic deformity had not occurred.Conclusion: The expansion force and the pullout strength of the partially recovered shape memory expansion clamp were determined biomechanically. The clinical study demonstrated that the shape memory expansion clamp is safe and effective. pubtype: Academic Journal doctype: case study clinical trial research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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