Polished trays reduce backside wear independent of post location in posterior-stabilized TKAs.

Background: Backside damage of the polyethylene in TKA is a potential source of debris. The location of the tibial post in posterior-stabilized implants may influence micromotion, and thus affect backside damage, as may surface roughness.

Questions: We used implant retrieval analysis to (1) examine if there were differences in backside damage among three modern posterior-stabilized implants attributable to variable surface roughness; (2) determine if the location of damage on the tibial post affected the pattern of backside damage; and (3) determine if demographics influenced backside damage.

Predictors of newly diagnosed cancer patients' understanding of the goals of their care at initiation of chemotherapy.

Background: The American Society of Clinical Oncology Quality Oncology Practice Initiative endorses in their core measures that providers should discuss the goals of care (GOC) at the time of chemotherapy consent. GOC refers to chemotherapy treatment intent: cure versus noncure. In this study, the authors sought to determine whether attributes of patients and initial patient-physician encounters were associated with patients' understanding of their GOC.

An investigation of auditory dimensional interaction in a bivariate bilateral conditioning paradigm in the rabbit.

The current study adapted the Garner paradigm for diagnosing separable versus integral perceptual dimensions to the eye-blink classical conditioning paradigm using rabbits. Specifically, this study examined the ability of rabbits to categorize stimuli based on one auditory dimension while ignoring a second, irrelevant dimension by displaying an appropriate eye-blink for bilaterally conditioned discriminative responses. Tones used in training varied along two dimensions, starting frequency and magnitude of frequency sweep upwards from the start.