Vestibular incisional subperiosteal tunnel access versus coronally advanced flap with connective tissue graft for root coverage of Miller's class I and II gingival recession: A randomized clinical trial.

Background: This study aimed to compare the clinical efficacy of vestibular incisional subperiosteal tunnel access (VISTA) with subepithelial connective tissue graft versus a coronally advanced flap (CAF) with subepithelial connective tissue graft for the treatment of gingival recession defects.

Materials And Methods: This randomized clinical trial was performed on 24 recession defects that were bilaterally Miller's class I or II in the maxillary canine and premolar area. One quadrant in each patient was selected randomly to receive VISTA (test group) or CAF (control group) with connective tissue graft.

A comprehensive multimodality heart motion prediction algorithm for robotic-assisted beating heart surgery.

Background: An essential requirement for performing robotic-assisted surgery on a freely beating heart is a prediction algorithm that can estimate the future heart trajectory.

Method: Heart motion, respiratory volume (RV) and electrocardiogram (ECG) signal were measured from two dogs during thoracotomy surgery. A comprehensive multimodality prediction algorithm was developed based on the multivariate autoregressive model to incorporate the heart trajectory and cardiorespiratory data with multiple inherent measurement rates explicitly.

A Hybrid Algorithm for Prediction of Varying Heart Rate Motion in Computer-Assisted Beating Heart Surgery.

An essential requirement for performing robotic assisted surgery on a freely beating heart is a prediction algorithm which can estimate the future trajectory of the heart in the varying heart rate (HR) conditions of real surgery with a high accuracy. In this study, a hybrid amplitude modulation- (AM) and autoregressive- (AR) based algorithm was developed to enable estimating the global and local oscillations of the beating heart, raised from its major and minor physiological activities. The AM model was equipped with an estimator of the heartbeat frequency to compensate for the HR variations.

Feasibility of infrared tracking of beating heart motion for robotic assisted beating heart surgery.

Background: Accurate tracking of the heart surface motion is a major requirement for robot assisted beating heart surgery.

Method: The feasibility of a stereo infrared tracking system for measuring the free beating heart motion was investigated by experiments on a heart motion simulator, as well as model surgery on a dog.

Results: Simulator experiments revealed a high tracking accuracy (81 μm root mean square error) when the capturing times were synchronized and the tracker pointed at the target from a 100 cm distance.

Relationship between ankle-brachial index and left ventricle ejection fraction in patients on hemodialysis.

Introduction: Ankle-brachial index (ABI) is a noninvasive test which employs as a diagnostic marker of atherosclerotic peripheral vascular disease in hemodialysis patients. This study aimed to investigate the association between ABI and left ventricular ejection fraction (LVEF) in patients on hemodialysis.

Materials And Methods: Eighty-six patients with end-stage renal disease undergoing hemodialysis and 100 patients referred for echocardiography without apparent kidney disease were included.