A positive positioning device comprises a plurality of stacked plates, a body, a spring-biased piston and a piston release device. The plurality of stacked plates have a central opening defined to receive a pivot shaft. The body houses the plurality of stacked plates and has an internal bore within which a cylinder is defined. The spring-biased piston is shaped to slide within the bore to apply a force to the stacked plates to resist rotation of a pivot shaft inserted through the central opening in the stacked plates. The piston release device is actuatable by a user to release the piston to decrease force applied to the stacked plates and allow free rotation of the pivot shaft.

A non-invasive dental or surgical monitoring system is disclosed. The monitoring system is comprised generally of dental or surgical equipment to be monitored, a main sensor unit, a set of sensors. The main sensor unit is in communication with various sensors removably attached to the equipment. The sensors monitor environment conditions related to the equipment rather than directly monitoring the equipment. The collected data is sent to the main sensor unit and can be accessed, or wirelessly transmitted by signal to a device or devices at another location. As collected data aggregates, a data profile can be created, machine learning can be used to discover patterns, and predictive analysis can be incorporated to help software make predictions of, or spot in real time, equipment problems based on deviations from the profile.

A chair for supporting a body of a user in a substantially upright position relative to a vertical-axis; the chair includes a frame, a chest-support, a seat and at least one knee-support. In a preferred embodiment, the chair includes a tray configured to hold items/tools such as dentist equipment. The chair is useful for supporting the body of the user who needs to be seated for a prolonged period of time, to prevent un-comfort associated with the same.

A chair for supporting a body of a user in a substantially upright position relative to a vertical-axis; the chair includes a frame, a chest-support, a seat and at least one knee-support. In a preferred embodiment, the chair includes a tray configured to hold items/tools such as dentist equipment. The chair is useful for supporting the body of the user who needs to be seated for a prolonged period of time, to prevent un-comfort associated with the same.

Positioning a cord of a corded instrument is accomplished by securing a wearable cord positioner around a wrist or arm of a technician, and then attaching a cord positioner attachment to the cord positioner for cords that are larger or smaller than the cord positioner is designed to accommodate. Multiple cord positioner attachments may be used with the same cord positioner, and the cord positioner attachments may be left attached to a cord permanently. Once a technician is done performing a task, the cord positioner attachment can simply be slipped off of the cord positioner attached to the technician and left with the cord so that it is never misplaced.

The invention is an assortment of apparatuses to magnetically tether a dental hygienist's hand to the utility tubes and hoses commonly found in a dental office. In a preferred embodiment, this is a ring containing a magnet which is worn by the hygienist. This tethers him or her finger to a utility hose or tube, which has a clasp that contains a reciprocal magnet. In another embodiment, the invention is a finger hold which contains a magnet that tether to the utility hose or tube via the magnetized clasp.

The invention is an assortment of apparatuses to magnetically tether a dental hygienist's hand to the utility tubes and hoses commonly found in a dental office. In a preferred embodiment, this is a ring containing a magnet which is worn by the hygienist. This tethers him or her finger to a utility hose or tube, which has a clasp that contains a reciprocal magnet. In another embodiment, the invention is a finger hold which contains a magnet that tether to the utility hose or tube via the magnetized clasp.

A system is disclosed for processing a plurality of customized dental restorations in an automated process that comprises a milling center, a carrier for holding a plurality of customized dental restorations, and a transfer system for transferring the customized restorations between processing units. Processing units may comprise one or more of a separating unit, a scrap disposal unit, a heating unit and a cooling unit. A multi-compartment tray and a material block are disclosed for use in the system.

Chest of drawers includes a fixed structure which defines at least one housing configured to house at least one moveable drawer configured to have a closed position with respect to the fixed structure in which the drawer is completely contained inside the housing and an open position in which at least part of the drawer protrudes outside the housing. The chest of drawers includes a first identification element visible from the outside of the fixed structure configured to provide information regarding the contents of the drawer.

Chest of drawers includes a fixed structure which defines at least one housing configured to house at least one moveable drawer configured to have a closed position with respect to the fixed structure in which the drawer is completely contained inside the housing and an open position in which at least part of the drawer protrudes outside the housing. The chest of drawers includes a first identification element visible from the outside of the fixed structure configured to provide information regarding the contents of the drawer.