introduction: the purpose of this study was to evaluate the morphologic surface of gutta­percha cones after cutting with different methods. materials and methods: the apical 3 millimeters of forty standardized, gutta-percha cones size 40 were cut off using scissors or a scalpel against a glass slab. the samples were then examined under scanning electron microscopy (sem) for topographic deformit...

BACKGROUND The aim of the study was the evaluation of the feasibility of glossectomy using an ultrasonic-activated surgical instrument. METHODS This was a prospective study of 13 consecutive patients who underwent glossectomy (12 partial and one total) for carcinoma of tongue with the use of ultrasonic scissors. RESULTS All 13 patients had glossectomy, with median blood loss of 0 mL. The gl...

BACKGROUND The aim of this study was to compare reliability in handling and function of resterilised and single-use disposable ultrasonic scissors. METHODS In a prospective randomized study, the surgeon blindly tested new and resterilised ultrasonic scissors. The parameters were force of activation, cutting effect, coagulation effect, error messages and disturbing generator noise. RESULTS 5...

Tracking plays an important role in Augmented Reality (AR) applications. One possibility to find and track an object is to attach a fixed arrangement of balls to it and use them to determine its three-dimensional position. Medical instruments like scissors could also be tracked that way but the ball arrangement can be disturbing while working with the instrument. For medical scissors another ap...

All the orbital M1 excitations, at both low and high energies, obtained from a rotationally invariant QRPA, represent the fragmented scissors mode. The high-energy M1 strength is almost purely orbital and resides in the region of the isovector giant quadrupole resonance. In heavy deformed nuclei the highenergy scissors mode is strongly fragmented between 17 and 25 MeV (with uncertainties arisin...

The purpose of this report is to discuss on a possible approach towards flexible object recognition. The rationale for this approach may be best shown by an example. Suppose that we want to recognize a pair of scissors. There should be hundreds of different shapes of a pair of scissors, so we can not do it just using a template matching. We have to describe the given figure as, for instance, “t...

The virtual scissors using virtual hands we propose enable users can cut virtual paper with their own hands. One purpose of our proposal is to facilitate implementing different tools simply by changing software parameters. Another is to make a general-purpose system with small-scale input and output devices for general applications, e.g., only using thin haptic information and force feedback. W...

We present an approach to support human skills of using common stationeries through computer augmentation. We focused on the features of materials being used in each stationery such as the conductivity of the scissors metal blades and clay erasers capability of mixing with carbon fiber and being molded into desired shapes. Our first system, enchanted scissors, is a digitally controlled pair of ...

Current simulations of surgical procedures do not provide haptic feedback of cutting forces felt while using surgical scissors. We have designed and tested “haptic scissors,” an interface that can display forces to a user grasping Metzenbaum scissor handles. By filtering and scaling cutting data obtained in previous work, we have created haptic virtual environments that can simulate the cutting...

The scissors congruence conjecture for the unimodular group is an analogue of Hilbert’s third problem, for the equidecomposability of polytopes. Liu and Osserman studied the Ehrhart quasi-polynomials of polytopes naturally associated to graphs whose vertices have degree one or three. In this paper, we prove the scissors congruence conjecture, posed by Haase and McAllister, for this class of pol...