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Objectives
To test that the speed of tooth translation is not affected by stress magnitude and growth status.
Setting and Sample Population
Advanced Education Orthodontic clinics at the Universities of Nebraska Medical Center and Missouri‐Kansas City. Forty‐six consenting subjects with orthodontic treatment plans involving maxillary first premolar extractions.
Materials and Methods
This randomized...
In this study, we design an electrically activated sucker that can handle workpieces with rough and uneven surface. The new sucker uses a motor to drive blades to form rotation flow in a shell, and the rotation flow generates cupped negative pressure distribution and resulting suction force. Different from the existing suckers, in the new sucker, the rotation flow is formed closely to the upper surface...
This paper explores a novel stiffness sensor which is mounted on the tip of a laparoscopic camera. The proposed device is able to compute stiffness when interacting with soft surfaces. The sensor can be used in Minimally Invasive Surgery, for instance, to localise tumor tissue which commonly has a higher stiffness when compared to healthy tissue. The purely mechanical sensor structure utilizes the...
This paper presents an innovative approach of utilising visual feedback to determine physical interaction forces with soft tissue during Minimally Invasive Surgery (MIS). This novel force sensing device is composed of a linear retractable mechanism and a spherical visual feature. The sensor mechanism can be adapted to endoscopic cameras used in MIS. As the distance between the camera and feature varies...
CFD methods have been used to simulate the operating conditions of two hydraulic couplings with different vane angles. By analyzing the numerical results of the two couplings, it is concluded that in traction and reversing damped conditions, the hydraulic coupling with angled vanes has a much higher capability of torque transmission than hydraulic coupling with radial vanes. However in backward condition,...
This paper introduces the design of a 6-DOF force and torque sensor that uses fiber optic guided light and linear polarizer materials to measure the applied force and torque on a grasped object. The sensor is also capable of measuring the contact direction between the sensor and the object. The developed sensor has a diameter of 16 mm, height of 15.75 mm and weight of 1 gram. The sensor's parallel...
Durability and reliability assessment is a key aspect of new product development. The focus of this paper is to assess the durability of the electrical joint of a PV product by examining its fatigue life under cyclic temperature excursions experienced throughout the product life cycle. An in progress method is presented for product life prediction as function of its deployment location. The life prediction...
This study evaluated the long-term effects of deep brain stimulation of the subthalamic nucleus (DBS-STN) on gait initiation. Six Parkinson's disease (PD) patients who had undergone DBS-STN and 31 control subjects were evaluated. PD subjects were assessed at two different time periods: 11.3 ± 10.3 (P1) and 78.9 ± 10.6 (P2) months after surgery. Subjects under stimulation were tested in two conditions:...
A novel force/position sensor based on FPSR?? (Force Position Sensing Resistor) has been developed which can measure the normal force to the sensor surface and the position where the force is applied. The compact SMD circuitry was located in the back of the sensor to process the initial signals and send it to the other interface circuits. The sensing area is 0.5 in ?? 4.0 in. The minimum detecting...
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