Locked vs. unlocked plate osteosynthesis of the proximal humerus – A biomechanical study

Locking Buttons Increase Fatigue Life of Locking Plates in a Segmental Bone Defect Model

“…However, the comparable fatigue life of locked and nonlocked constructs suggests working length (the distance between the innermost screws) and plate cross-sectional geometry are more important. In contrast to previous studies [13,14,22,25,31,41], we found no difference between the fatigue life of locked and nonlocked constructs in cyclic axial loading. Previous biomechanical studies generally show locked plates have a greater fatigue life than nonlocked constructs.…”

“…Previous in vitro biomechanical studies have compared locking plates and nonlocking plates in fracture models [13,14,22,25,31,41]. In most of these studies the effect of locked plating on rigidity or strength was assessed, but the comparisons involved plates and/or screws of different designs, since the shapes of the locking and compression plates and screws are different in most systems.…”

Study of operative management of proximal humerus fracture treated with locking plates

“…[8][9][10][11] All these techniques have been associated with a varying rate of complications such as Locking periarticular plate fixation offers more advantages compared to many implants and have been shown to be superior to non-locking plates. [19][20][21] Meticulous care must be taken to preserve the overlying soft tissues during open reduction and internal fixation since damage to these soft tissues may disturb the vascularity of fracture fragments. [22][23][24] In our study, we used the standard deltoid split approach in most of the patients.…”

Three-dimensional Finite Element Analysis of Bone Fixation in Bilateral Sagittal Split Ramus Osteotomy Using Individual Models

“…6). The 3D FEA loading conditions adopted were very simple and based on those used in previous studies [16][17][18] .…”

“…Recently, BSSRO has been further modified to include locking mini-plate/screw systems, as this provides similar fixation to that achieved with bicortical fixation systems 6) . Many orthopedic studies have investigated the strength and stability of locking miniplate/screw systems from a bioengineering perspective 17) . Few studies, however, have investigated these factors in orthognathic surgery 13) .…”