Abstract: Disclosed is a subperiosteal tissue expander for reconstruction of the edentulous atrophied alveolar ridge of the mandible or maxilla. The expander includes an inflatable tube curved into a "C" shape to match the curvature of the human alveolar ridge, having a layer of reinforcement material on one side of the inflatable tube and tabs for attachment of lines at either end of the inflatable tube. Also disclosed is a method for reconstructing the edentulous atrophied alveolar ridge of the maxilla or the mandible by placing a tissue expander subperiosteally along the alveolar ridge of the maxilla or mandible, inflating the expander to create a subperiosteal channel, removing the expander, and filling the subperiosteal channel with a hard material such as hydroxylapatite.

Abstract: Disclosed is a subperiosteal tissue expander for reconstruction of the edentulous atrophied alveolar ridge of the mandible or maxilla. The expander includes an inflatable tube curved into a "C" shape to match the curvature of the human alveolar ridge, having a layer of reinforcement material on one side of the inflatable tube and tabs for attachment of lines at either end of the inflatable tube. Also disclosed is a method for reconstructing the edentulous atrophied alveolar ridge of the maxilla or the mandible by placing a tissue expander subperiosteally along the alveolar ridge of the maxilla or mandible, inflating the expander to create a subperiosteal channel, removing the expander, and filling the subperiosteal channel with a hard material such as hydroxylapatite.

Abstract: A modified coin track assembly for known slot machines of the type which is generally operated by a person first inserting a coin of a certain value into the machine which causes the machine to be conditioned for a gaming operation, and by the person then initiating a gaming operation. The modified coin track assembly receives the inserted coin and checks the coin for certain predetermined parameters such as thickness, surface light reflectivity and an attached string, and prevents condition of the machine for a gaming operation if the coin does not have those predetermined parameters or has a string attached.

Abstract: An improved swabbing cup construction for use on the mandrel of a swabbing tool for clearing liquids and particulate matter, and initiating the flow of oil, from an oil well pipe. The improved cup construction is manually adjustable on the mandrel to compensate for wear of the cup to greatly increase the life of the cup and to substantially facilitate the swabbing procedure for an oil well pipe. The method comprises the steps of observing the wear of the swabbing cup and of manually increasing the outer diameter of the swabbing cup while it is on the mandrel and during swabbing operations of said oil well pipe.