Abstract: A device for weight training is attached to a weight lifting apparatus, such as a barbell or a selectorized weight machine, to provide a continuously variable resistance force to the lifting bar of the apparatus. As the power demands of the particular exercise decrease and then increase over an exercise cycle due to the musculoskeletal characteristics of the body, this device provides increasing and then decreasing resistance force to dampen out the variations in the power demands over the exercise cycle. A length of latex tubing intended for a specific exercise can be used to provide the variable resistance force. The latex tubing is connected at one end to the weight lifting apparatus and at the other end to an anchor, such as a platform loaded with weights.

Abstract: A method for reattaching to a first abutment tooth a detached crown of a dental bridge having at least one other crown fixed onto a second abutment tooth includes the steps of forming a vent hole through the detached crown, inserting the open tip of a syringe needle into the vent hole, preliminarily securing and sealing the needle in the vent hole and thereafter applying a flowable dental adhesive material such as an acrylic resin to securely reinforce the connection between the needle and crown and seal any gap therebetween. The void under the detached crown is then washed by ejecting fluids through the needle with a syringe barrel. A flowable dental cement is then ejected through the needle to fill the void between the crown and abutment tooth. Upon curing of the cement, the acrylic resin is dislodged from the surface of the crown enabling withdrawal of the needle from the vent hole which is then plugged.