Whether visible or hidden, a hinge should be not only strong but also adjustable so that doors can align with the surrounding face-frame. The frames around panels on the cabinet doors and on the exposed side of the cabinet have deep grooves. Panels aren't glued or fastened into the grooves, which allows them to expand and contract with changes in temperature and humidity without cracking or pushing the frame apart.
Tiny pads keep the panels centered.
The quietest slides run on nylon bearings. A good slide can carry loads of at least 75 pounds and will allow a drawer to open fully. Biscuits glued into these grooves join the rail to the cabinet floor. To keep the shelf from wandering, a locking device such as a plastic retainer plugs into an adjustment hole above. This Old House and the This Old House window and This Old House Online are trademarks of WGBH Educational Foundation.