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The use of fibre-reinforced composite for the creation of anchor units in sectional orthodontic appliances Ian Hutchinson Aidan McKeever Dental Update 2024 7:1, 707-709.
Authors
IanHutchinson
BDS, FDS RCS(Ed), MOrth, MSc
Specialist Orthodontist, Whitetree Specialist Centre, 1–3 North View, Westbury Park, Bristol BS6 7PU, UK
The benefits of fibre-reinforced composite (FRC), such as strength, excellent bonding characteristics and aesthetics, are widely appreciated in restorative dentistry. These properties are well suited to the creation of orthodontic anchorage units in full-arch or sectional appliances. In this article, two clinical cases are presented where FRC has been used to create anchorage units in adult orthodontic patients with high aesthetic demands. Anchorage units created in this way are immediate, aesthetic, comfortable and require minimal unwanted tooth movement.
Clinical Relevance: The article describes techniques that may be of interest to clinical orthodontists by describing a novel use for a material not commonly used in orthodontics.
Article
Fibre-reinforced composites (FRC) have many applications in prosthetic dentistry and periodontology, where their use has been described in fixed partial dentures, endodontic posts, and periodontal/post-traumatic splinting.1,2,3 In all of these applications, FRC has been used as an alternative to traditional cast metal structures as a result of its several advantages:
The improved aesthetics and ‘bondability’ of FRC, compared with metal,4,5 means that it's a natural choice for use in permanent bonded lingual retainers in orthodontics. Further novel uses for FRC in orthodontics have been described,6 such as space maintenance and framework construction for temporary pontics in cases of hypodontia or avulsion.7 The bond strength of FRC used to splint teeth into groups has been demonstrated (in vitro) to be stronger than that of metal attachments,8 and the flexural strength of FRC used to link adjacent teeth has been shown to be of sufficient strength to withstand chewing forces over a long period.9,10,11 For these reasons, an ideal use for FRC is in the creation of orthodontic anchorage units, particularly in the event of:
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