Tibial anatomical landmarks for transverse plane rotation of the tibial tray have not been validated. The current authors propose aligning the tibial tray with both the anterior tibial center point of rotation (ATCPR) and the femoral trochlear groove (FTG) to establish the ideal tibial tray rotation in total knee arthroplasty (TKA). When the tibial tray centerline was aligned with ATCPR and FTG...

The keel design of the tibial tray is essential for the transmission of the majority of the forces to the peripheral bone structures, which have better mechanical proprieties, thus reducing the risk of loosening. The aim of the present study was to compare the behaviour of different tibial tray designs submitted to torsional forces. Four different tibial components were modelled. The 3-D recons...

Aseptic loosening of the tibial component is the major complication of total knee arthroplasty. There is an association between early excessive shear micromotion between the bone and the tray of the tibial component and late aseptic loosening. Using non-linear finite element analysis, whether a tibial tray with a circumferentially flanged rim and a mating cut in the proximal tibia could minimiz...

Hydroponic green forage (HGF) is a high-quality ecological product containing full range of required nutrients and vitamins. A two-tier hydroponic installation with rigid load-bearing elements has been developed at Kuban State Agrarian University named after I. T. Trubilin. The purpose the research to determine strength mass complex ratios that ensure stable dynamics movement all system during ...

This article presents computationally efficient algorithms for modeling two special cases of rigid contact— contact with only viscous friction and contact without slip—that have particularly useful applications in robotic locomotion and grasping. Modeling rigid contact with Coulomb friction generally exhibits O(n) expected time complexity in the number of contact points and 2 worst-case complex...

BACKGROUND Accurate impression making is an essential prerequisite for achieving a passive fit between the implant and the superstructure. The aim of this in vitro study was to compare the three-dimensional accuracy of open-tray and three closed-tray impression techniques. MATERIALS AND METHODS Three acrylic resin mandibular master models with four parallel implants were used: Biohorizons (BI...

Using sie®e-tray air stripping as a means of remo®ing contaminants from surfactant solutions was studied to determine if tray air stripping can be applied successfully to treating surfactant-containing wastewaters and, if so, to de®elop a quantitati®e approach for designing tray air-stripping systems for treating surfactant-containing wastewaters. High-concentration surfactant solutions were pr...

aClinical Lecturer, Biologic and Materials Sciences, Division of Prosthodontics. bProfessor, Biologic and Materials Sciences, Division of Prosthodontics. (J Prosthet Dent 2007;98:68-69) 1 A, Three-mm-high healing abutments in place. B, Close tray impression copings. In patients for whom a fixed complete denture is required, different techniques are described to determine the occlusal vertical d...