OBJECTIVE: The prosthetic nucleus (PDN-SOLO) reconstruct the anatomy and preserve the biomechanics of intervertebral disc with a migration rate of 10% and sinking rate of 19%. Therefore, a fixing system to avoid these complications was proposed. METHODS: A total of 20 patients were followed-up for at least three years. The assessment of pain with VAS, Oswestry Scale function (OS) and disk by radiological studies and magnetic resonance imaging were applied. Statistical analysis was made by Student's t-test. RESULTS: The subjects were 12 men and 8 women with a mean age of 37.6 years. VAS preoperative values were 7.6 points and OS 67%, the height of intervertebral space was 7.67 mm. For three years, the VAS pain score was 0.7 and OS less than 6% (p<0.000). There was an increase of average disc height of 2 mm. Prosthesis showed mobility in rotation during the initial placement in 12 patients. In 2 cases the implant migrated and it was necessary to remove it. The VAS evaluation and OS were 0.7 points and 1.4%. The height greed of intersomatic space improved in 2.5 mm. A migration in 23 months by non-indicated physical exertion represented 5%. There was no sinking. CONCLUSION: We can be concluded that there was a reduction of pain and degree of disability associated with less edema platforms and increase the intervertebral space.
Intervertebral disk displacement; Intervertebral disk displacement; Biomechanics; Joint prosthesis
