Serial Magnetic Resonance Imaging Evaluation of a Bioabsorbable Interference Screw and the Adjacent Bone

RETRACTED ARTICLE: Graft fixation alternatives in anterior cruciate ligament reconstruction

“…Although lower fixation strengths have been reported with bioabsorbable interference screws [33], most studies indicate comparable strength and stiffness in sideby-side comparisons of metal and bioabsorbable interference screws [11,29,[33][34][35][36][37][38][39][40][41][42]. Clinically, bioabsorbable screws have provided good results [14][15][16]43]. …”

“…Lajtai et al [43] reported complete absorption and replacement with new bone by MRI at 5 years in 28 patients, Fink reported complete screw degradation by CT scan at 12 months [14], and Lajtai et al [16,44] noted complete absorption by MRI in 6 months. However, some bioabsorbable screws remain evident on scans up to 24 months [45].…”

“…Three potential disadvantages are screw breakage during insertion [16,38,39], an inflammatory response described with bioabsorbable implants [46] and inadequate fixation after partial degradation prior to biologic incorporation. However, more bone plug fractures have been seen with metal interference screws [41], and similar cysts have been seen with metallic fixation as those reported with bioabsorbable screws [47].…”

“…Many such methods and implants are available to optimize graft fixation. Although some laboratory studies demonstrate significant differences between various methods, excellent clinical results may be demonstrated with a wide range of options [3,[9][10][11][12][13][14][15][16]. Therefore, the techniques that are employed depend greatly on surgeon ability, knowledge, and graft selection.…”

Estudo prospectivo randomizado entre as fixações transversas e extracorticais nas reconstruções do ligamento cruzado anterior

“…The data obtained were subjected to statistical stability after the knee operation, thereby avoiding loosening or micromovement of the grafts, which could promote laxity prior to attainment of biological integration (2,5,6,9,10) . Among the graft fixation methods, there are some that use interference screws made of metal or bioabsorbable materials (poly-L-lactate acid), which are generally used in an intra-articular manner in the femur (10) . There are other methods in which use of screws, transverse pins or extracortical anchorage devices like EZLoc™ (11) and Endobutton TM are recommended.…”