Assertion: clasp's clasp | /r/MadeOf | a loop of wire
Facets:
Source sentences:
text: The first orthodontic clasp consisted of a loop of wire that fitted to the buccal gingival margin but the lack of buccal undercuts in teeth that are not sufficiently erupted led to attempts to design a clasp that would use the mesiobuccal and distobuccal undercuts, which are accessible when a tooth is less well erupted.