Biomaterial Database

The relationship of the position of crown margins to gingival health. 1987

D A Orkin, and J Reddy, and D Bradshaw

A survey was conducted of 423 crown margins that were divided into 355 subgingival margins and 68 supragingival margins. The plaque index, gingival bleeding, and recession surrounding the artificial crown were recorded and compared to the unprepared contralateral tooth. Gingival tissues tended to bleed 2.42 times more frequently with subgingival margins and have a 2.65 times higher chance of gingival recession. Crowns with supragingival margins did not differ significantly compared with the contralateral tooth, but crowns with subgingival margins had greater bleeding and recession compared with the contralateral tooth. It is recommended that supragingival margins become standard clinical procedures when feasible. A further analysis will be instituted to determine whether different crown materials affect the gingivae.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008875	Middle Aged	An adult aged 45 - 64 years.	Middle Age
D003442	Crowns	A prosthetic restoration that reproduces the entire surface anatomy of the visible natural crown of a tooth. It may be partial (covering three or more surfaces of a tooth) or complete (covering all surfaces). It is made of gold or other metal, porcelain, or resin.	Dental Crowns,Crown, Dental,Crowns, Dental,Dental Crown,Crown
D003774	Dental Plaque Index	An index which scores the degree of dental plaque accumulation.	Dental Plaque Indexes,Dental Plaque Indices,Index, Dental Plaque,Indexes, Dental Plaque,Indices, Dental Plaque
D003779	Denture Design	The plan, delineation, and location of actual structural elements of dentures. The design can relate to retainers, stress-breakers, occlusal rests, flanges, framework, lingual or palatal bars, reciprocal arms, etc.	Denture Designs,Design, Denture,Designs, Denture
D005260	Female		Females
D005881	Gingiva	Oral tissue surrounding and attached to TEETH.	Gums,Interdental Papilla,Papilla, Interdental,Gum
D005884	Gingival Hemorrhage	The flowing of blood from the marginal gingival area, particularly the sulcus, seen in such conditions as GINGIVITIS, marginal PERIODONTITIS, injury, and ASCORBIC ACID DEFICIENCY.	Hemorrhage, Gingival,Gingival Hemorrhages
D005889	Gingival Recession	Exposure of the root surface when the edge of the gum (GINGIVA) moves apically away from the crown of the tooth. This is common with advancing age, vigorous tooth brushing, diseases, or tissue loss of the gingiva, the PERIODONTAL LIGAMENT and the supporting bone (ALVEOLAR PROCESS).	Gingival Atrophy,Atrophy of Gingiva,Gingiva Atrophies,Gingiva Atrophy,Gingival Atrophies,Gingival Recessions,Recession, Gingival,Recessions, Gingival
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man