Posterior lumbar interbody fusion using cages, titaniumrods, and pedicle screws is considered today as the gold standard of surgical\ntreatment of lumbar degenerative disease and has produced satisfying long-term fusion rates. However this rigid material could\nchange the physiological distribution of load at the instrumental and adjacent segments, a main cause of implant failure and adjacent\nsegment disease, responsible for a high rate of further surgery in the following years. More recently, semirigid instrumentation\nsystems using rods made of polyetheretherketone (PEEK) have been introduced. This clinical study of 21 patients focuses on\nthe clinical and radiological outcomes of patients with lumbar degenerative disease treated with Initial VEOS PEEKÃ?Â-Optima\nsystem (Innovââ?¬â?¢Spine, France) composed of rods made from PEEK-OPTIMAÃ? polymer (Invibio Biomaterial Solutions,UK) without\narthrodesis.With an average follow-up of 2 years and half, the chances of reoperation were significantly reduced (4.8%), quality of\nlife was improved (ODI = 16%), and the adjacent disc was preserved in more than 70% of cases. Based on these results, combined\nwith the biomechanical and clinical data already published, PEEK rods systems can be considered as a safe and effective alternative\nsolution to rigid ones.
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