title: [Transpedicular dynamics stabilization in the treatment of lumbar stenosis. Fourth years follow-up].
abstract: BACKGROUND
  We need to evaluate the efficacy and safety of the use of dynamic fixation in patients with narrow lumbar through comparing the assessment of two years with 4 years of follow-up.
  
  
  METHODS
  Prospective, longitudinal, autocontrol deliberately and sequential intervention, in lumbar stenosis patients who made treatment with dynamic stabilization posterior type Acuflex. An evaluation of four of final follow-up.
  
  
  RESULTS
  18 patients who completed follow-up two years results as a basis for comparison: 18 patients, 14 female and 4 male, average age 44.05 years. Pain evaluated with numerical visual scale was found in the lower back at 24 months in an average of 2.84 and 48 months in 3.26. We measured the functional level of Oswestry at two years to be 24% and at four years 22.44%, with a p = 0.373. In the magnetic resonance for classification of patients 15 Pfirrmann without changes and three with increase of a degree. According to patients 2 Modic changes one of type 0 to type III and another to type I. We have observed that five patients have required second surgery for removal of material findings.
  
  
  CONCLUSIONS
  There is no change between 2 and 4 years in the scale of Oswestry and pain with visual numerical scale functionality. The average height in discs had change with statistical significance, in the comparative period. The intervertebral discs had changes in 3 patients with direct relationship between scale of Pfirrmann and Modic. The rest of patients keep rehydration and normal disc height.
authors: División de Cirugía Especial, Instituto Nacional de Rehabilitación, Magdalena Contreras, D.F. México. alereyes@vertebrae.com.mx
authors: Alejandro
authors: A
authors: Reyes-Sánchez
authors: Guadalupe
authors: G
authors: Sánchez-Bringas
authors: Barón
authors: B
authors: Zarate-Kalfopulos
authors: Armando
authors: A
authors: Alpizar-Aguirre
authors: Eleazar
authors: E
authors: Lara-Padilla
authors: Luis Miguel
authors: LM
authors: Rosales-Olivares
mesh_terms: D000328:Adult; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D019637:Orthopedic Procedures / Q000379:methods; D011446:Prospective Studies; D013130:Spinal Stenosis / Q000601:surgery*; D013997:Time Factors; D055815:Young Adult
keywords: Dynamic spine stabilization; disk herniation; disk regeneration; dynamic rods; spinal stenosis