scholarly journals Risk Factor Analysis of Facet Fusion Following Cervical Lateral Mass Screw Fixation with a Minimum 1-Year Follow-up: Assessment of Maximal Insertional Screw Torque and Incidence of Loosening

2020 ◽  
Author(s):  
Ryo KANEMATSU ◽  
Junya HANAKITA ◽  
Toshiyuki TAKAHASHI ◽  
Manabu MINAMI ◽  
Tomoo INOUE ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Risk Factor ◽  
Screw Fixation ◽  
Risk Factor Analysis ◽  
Lateral Mass ◽  
Lateral Mass Screw

scholarly journals Long-term implant success at the Academy for Oral Implantology: 8-year follow-up and risk factor analysis

2014 ◽  
Vol 44 (3) ◽  
pp. 102 ◽  
Author(s):  
Dieter Busenlechner ◽  
Rudolf Fürhauser ◽  
Robert Haas ◽  
Georg Watzek ◽  
Georg Mailath ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Risk Factor ◽  
Risk Factor Analysis ◽  
Oral Implantology

Risk Factor Analysis for PJK After Adult Spinal Deformity Surgery: A New Simple Scoring System Based on 417 Patients with Two-Year Follow-Up

2017 ◽  
Vol 17 (10) ◽  
pp. S187-S188
Author(s):  
Renaud Lafage ◽  
Frank J. Schwab ◽  
Eric O. Klineberg ◽  
Douglas C. Burton ◽  
Shay Bess ◽  
...  
Keyword(s):  
Factor Analysis ◽  
Risk Factor ◽  
Spinal Deformity ◽  
Scoring System ◽  
Adult Spinal Deformity ◽  
Risk Factor Analysis ◽  
Spinal Deformity Surgery

Influence of Follow-up Response on Risk-Factor Analysis

1999 ◽  
Vol 47 (01) ◽  
pp. 32-37 ◽  
Author(s):  
B. Osswald ◽  
U. Tochtermann ◽  
G. Thomas ◽  
C. Vahl ◽  
S. Hagl
Keyword(s):  
Factor Analysis ◽  
Risk Factor ◽  
Risk Factor Analysis

scholarly journals MINIMALLY INVASIVE SINGLE-DOOR PLATE LAMINOPLASTY WITH LATERAL MASS SCREW FIXATION FOR THE UNSTABLE SEGMENT. REPORT OF TWO CASES WITH LONG FOLLOW-UP

2017 ◽  
Vol 16 (3) ◽  
pp. 236-239 ◽  
Author(s):  
SERGIO SORIANO-SOLÍS ◽  
JAVIER QUILLO-OLVERA ◽  
MANUEL RODRÍGUEZ-GARCÍA ◽  
HÉCTOR ANTONIO SORIANO SOLÍS ◽  
JOSÉ-ANTONIO SORIANO-SÁNCHEZ
Keyword(s):  
Minimally Invasive ◽  
Cervical Spondylotic Myelopathy ◽  
Screw Fixation ◽  
Short Form ◽  
Lateral Mass ◽  
Lateral Mass Screw ◽  
Sf 36 ◽  
Flexion Extension ◽  
Multilevel Cervical Spondylotic Myelopathy

ABSTRACT Objective: To report two cases of multilevel cervical spondylotic myelopathy with monosegmental instability, in which we performed a minimally invasive microsurgical transmuscular approach with tubular retractors to create a single-door plate laminoplasty combined with fixation of the unstable segment with lateral mass screws. Methods: The surgical procedures were performed by the senior author. In both patients, the follow-up was performed using the Oswestry Disability Index (ODI), the Visual Analogue Scale for neck and radicular pain (radVAS, neckVAS), the Neck Disability Index (NDI) and the Short Form 36 (SF-36), in the preoperative (preop) and postoperative (postop) periods, and at 1, 3, 6, 12, 18 and 24 months. A radiological evaluation also was performed, which included AP, lateral and flexion-extension films at 6, 12 and 24 months and CT-scan at 12 months. Results: Case 1 - preop ODI: 40%, 24 months postop ODI: 4%; preop radVAS: 7, 24 months radVAS: 0; preop neckVAS: 8, postop 24 months neckVAS: 0; preopNDI: 43%, 24 months PostopNDI: 8%; SF-36 - preop Physical Functioning (PF): 40, preop Vitality (VT): 40, preop Emotional role functioning (RE): 33.3, Bodily pain (BP): 51, General Health (GH): 57, Social Functioning (SF): 75; postop PF: 95, VT: 95, RE: 100, BP: 74, GH: 87, SF: 100. Case 2 - preopODI: 46%, 24 months postopODI: 10%; preop radVAS: 7, 24m radVAS: 0; preop neckVAS: 9, postop 24 months neckVAS: 0; preopNDI: 56%, 24 months PostopNDI: 15%; SF-36 - preop PF: 39, VT: 45, RE: 33.3, BP: 50, GH: 49, SF: 70; postop PF: 90, VT: 100, RE: 100, BP: 82, GH: 87, SF: 100. No complications, cervical instability or signs of failed surgery were found trough and at final follow-up at 24 months. We found significant clinical improvement in both patients. Conclusions: Minimally invasive cervical laminoplasty combined with lateral mass screw fixation for the unstable segment is a useful technique in cases with multilevel cervical spondylotic myelopathy associated with monosegmental instability. Additional comparative studies are needed to establish its efficacy.

Surgical Treatment of Multilevel Degenerative Cervical Myelopathy: Open-Door Laminoplasty and Fixation via Unilateral Approach. A Feasibility Study

2021 ◽  
Author(s):  
Gregor Schmeiser ◽  
Janina Isabel Bergmann ◽  
Luca Papavero ◽  
Ralph Kothe
Keyword(s):  
Surgical Treatment ◽  
Cervical Myelopathy ◽  
Screw Fixation ◽  
Lateral Mass ◽  
Open Door ◽  
Lateral Mass Screw ◽  
Unilateral Approach ◽  
The Mean ◽  
Degenerative Cervical Myelopathy

Abstract Objective We compared open-door laminoplasty via a unilateral approach and additional unilateral lateral mass screw fixation (uLP) with laminectomy and bilateral lateral mass screw fixation (LC) in the surgical treatment of multilevel degenerative cervical myelopathy (mDCM). Methods A retrospective cohort analysis of 46 prospectively enrolled patients (23 uLP and 23 LC). The minimum follow-up was 1 year. Neck and arm pains were evaluated with visual analog scales and disability with the Neck Disability Index (NDI). Myelopathy was rated with the modified Japanese Orthopaedic Association (mJOA) score. Cervical sagittal parameters were measured on plain and functional X-ray films with a specific software. The statistical significance was set at p < 0.05. Fusion was defined as <2 degrees of intersegmental motion on flexion/extension radiographs. Results The two groups were similar in age and comorbidities. The mean operation time and the mean hospital stay were shorter in the uLP group (p = 0.015). The intraoperative blood loss did not exceed 200 mL in both groups. At follow-up, the groups showed comparable clinical outcome data. The sagittal profile did not deteriorate in either group. Fusion rates were 67% in the uLP group and 92% in the LC group. No infections occurred in either group. In the LC group, one patient developed a transient C5 palsy. Revision surgery was required for a malpositioned screw (LC) and for one implant failure (uLP). Conclusion Laminoplasty and unilateral fixation via a unilateral approach achieved comparable clinical and radiologic results with laminectomy and bilateral fixation, despite a lower fusion rate. However, the surgical traumatization was less.

Primary intracoronary stenting in acute myocardial infarction: Long-term clinical and angiographic follow-up and risk factor analysis

2000 ◽  
Vol 139 (2) ◽  
pp. 208-216 ◽  
Author(s):  
Adnan Kastrati ◽  
Jürgen Pache ◽  
Josef Dirschinger ◽  
Franz-Josef Neumann ◽  
Hanna Walter ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Factor Analysis ◽  
Risk Factor ◽  
Risk Factor Analysis ◽  
Intracoronary Stenting

Atlantoaxial stabilization with the use of C1–3 lateral mass screw fixation

2006 ◽  
Vol 5 (2) ◽  
pp. 172-177 ◽  
Author(s):  
Eric M. Horn ◽  
Jonathan S. Hott ◽  
Randall W. Porter ◽  
Nicholas Theodore ◽  
Stephen M. Papadopoulos ◽  
...  
Keyword(s):  
Screw Fixation ◽  
Intraoperative Complications ◽  
Atlantoaxial Instability ◽  
Lateral Mass ◽  
Lateral Mass Screw ◽  
Transarticular Screw ◽  
Transarticular Screw Fixation ◽  
Cervical Orthosis ◽  
Atlantoaxial Stabilization

✓ Atlantoaxial stabilization has evolved from simple posterior wiring to transarticular screw fixation. In some patients, however, the course of the vertebral artery (VA) through the axis varies, and therefore transarticular screw placement is not always feasible. For these patients, the authors have developed a novel method of atlantoaxial stabilization that does not require axial screws. In this paper, they describe the use of this technique in the first 10 cases. Ten consecutive patients underwent the combined C1–3 lateral mass–sublaminar axis cable fixation technique. The mean age of the patients was 62.6 years (range 23–84 years). There were six men and four women. Eight patients were treated after traumatic atlantoaxial instability developed (four had remote trauma and previous nonunion), whereas in the other two atlantoaxial instability was caused by arthritic degeneration. All had VA anatomy unsuitable to traditional transarticular screw fixation. There were no intraoperative complications in any of the patients. Postoperative computed tomography studies demonstrated excellent screw positioning in each patient. Nine patients were treated postoperatively with the aid of a rigid cervical orthosis. The remaining patient was treated using a halo fixation device. One patient died of respiratory failure 2 months after surgery. Follow-up data (mean follow-up duration 13.1 months) were available for seven of the remaining nine patients and demonstrated a stable construct with fusion in each patient. The authors present an effective alternative method in which C1–3 lateral mass screw fixation is used to treat patients with unfavorable anatomy for atlantoaxial transarticular screw fixation. In this series of 10 patients, the method was a safe and effective way to provide stabilization in these anatomically difficult patients.

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