Pendulum Appliance
A fixed intraoral device that uses nickel-titanium coil springs anchored to the palate to distalize (move posteriorly) the upper molars, creating space in the dental arch.
Full Definition
The Pendulum appliance, introduced by James Hilgers, consists of a palatal acrylic button (the 'Nance button') providing anchorage and finger springs that rotate posteriorly to push the maxillary first molars distally. It is used primarily as an alternative to headgear for Class II correction or for relief of arch length discrepancy. The appliance delivers continuous force without relying on patient compliance. Editors should note the capital 'P' when referring to the named appliance type, and be aware of variant spellings such as 'Pendulum appliance' versus 'pendulum appliance' in different style guides.
Usage
Usage note: Capitalise when referring specifically to the Hilgers design. Use lowercase 'pendulum appliance' only when describing the mechanism generically. 'Distalisation' (UK) and 'distalization' (US) are both acceptable; apply consistently.
In Context
- "The Pendulum appliance achieved 4 mm of molar distalisation over six months without requiring patient cooperation." — Clinical trial results section
- "Some authors hyphenate the device as 'Pendulum-type appliance' when describing the mechanism generically." — Systematic review methods