Abstract: Disclosed herein is a hand tool comprising a first hand tool member comprising a pin, a hole, a bearing surface, and at least one groove, and a second hand tool member comprising a hole, a bearing surface, and at least one groove. The groove of the first hand tool member engages the groove of the second hand tool member when the hand tool is in a closed position. Further, the groove of the first hand tool member disengages from the groove of the second hand tool member when the hand tool is in a fully open position.

Abstract: An apparatus for receiving a model of a dental arch of a patient is provided. The apparatus comprises a generally U-shaped base portion and at least three spaced-apart radio-opaque members secured to the base. An extension may project from the base portion and may include a fourth radio-opaque member secured to the extension. The apparatus also includes means for securing the apparatus to a mounting surface. Also provided is a positioning apparatus and method for enabling use of the model-receiving apparatus to position the dental arch model within a dental articulator to simulate the position of the dental arch in a skull. The positioning apparatus includes a first member, a second slidable with respect to the first member and a third member slidable with respect to the second member.

Abstract: A apparatus is described for positioning the head of a patient for taking various x-ray images of the head. The head-positioning apparatus contemplates an arm member rotatably mounted to a pivot member for rotating the arm about an axis of rotation and at least one ear locating member coupled to the arm member in which the ear locating member rotates with the arm member and in alignment with the axis of rotation. The apparatus also contemplates an x-ray emitting source and an indicator coupled to the x-ray emitting source to provide the indicator and x-ray emitting source to rotate in conjunction and same direction with each other, in which the indicator locates a plane alignable with an ear of the patient.

Abstract: A apparatus is described for positioning the head of a patient for taking various x-ray images of the head. The head-positioning apparatus contemplates an arm member rotatably mounted to a pivot member for rotating the arm about an axis of rotation and at least one ear locating member coupled to the arm member in which the ear locating member rotates with the arm member and in alignment with the axis of rotation. The apparatus also contemplates an x-ray emitting source and an indicator coupled to the x-ray emitting source to provide the indicator and x-ray emitting source to rotate in conjunction and same direction with each other, in which the indicator locates a plane alignable with an ear of the patient.