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

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.

[1]  L. A. Weinberg.  Esthetics and the gingivae in full coverage , 1960 .

[2]  F. Holstein,et al.  Scanning electron microscope study of the junction between restorations and gingival cavosurface margins. , 1976, The Journal of prosthetic dentistry.

[3]  R A Yuodelis,et al.  Facial and lingual contours of artificial complete crown restorations and their effects on the periodontium. , 1973, The Journal of prosthetic dentistry.

[4]  C. Janenko,et al.  Anterior crowns and gingival health. , 1979, Australian dental journal.

[5]  J S Marcum,et al.  The effect of crown marginal depth upon gingival tissue. , 1967, The Journal of prosthetic dentistry.

[6]  J M Birkeland,et al.  Periodontal conditions in patients 5 years following insertion of fixed prostheses. Pocket depth and loss of attachment. , 1976, Journal of oral rehabilitation.

[7]  F. M. Gardner,et al.  Margins of complete crowns--literature review. , 1982, The Journal of prosthetic dentistry.

[8]  H. G. Carter,et al.  The Gingival Bleeding Index. , 1974, Journal of periodontology.

[9]  H. Löe,et al.  EXPERIMENTAL GINGIVITIS IN MAN. , 1965, The Journal of periodontology.

[10]  J. Silness.  Periodontal conditions in patients treated with dental bridges. , 1970, Journal of periodontal research.

[11]  A. Leon.  The periodontium and restorative procedures. A critical review. , 1977, Journal of oral rehabilitation.

[12]  J. Stoner,et al.  Gingival recession in the lower incisor region of 15-year-old subjects. , 1980, Journal of periodontology.

[13]  G. D. Miller,et al.  Current controversies in axial contour design. , 1980, The Journal of prosthetic dentistry.

[14]  R. N. Powell,et al.  The effect of placement of cervical margins of class II amalgam restorations on plaque accumulation and gingival health. , 1979, Journal of oral rehabilitation.

[15]  Stanley Daniel Tylman,et al.  Theory and practice of crown and bridge prosthodontics , 1965 .

[16]  H. Löe,et al.  PERIODONTAL DISEASE IN PREGNANCY. II. CORRELATION BETWEEN ORAL HYGIENE AND PERIODONTAL CONDTION. , 1964, Acta odontologica Scandinavica.

[17]  I. F. Ross.  The relation between periodontal therapy and fixed restorative care. , 1971, Journal of periodontology.

[18]  E. Barrington.  An overview of periodontal surgical procedures. , 1981, Journal of periodontology.

[19]  D. Koth,et al.  Full crown restorations and gingival inflammation in a controlled population. , 1982, The Journal of prosthetic dentistry.

[20]  D. Behrend.  Ceramometal restorations with supragingival margins. , 1982, The Journal of prosthetic dentistry.

[21]  J. Watson,et al.  Margin placement of esthetic veneer crowns. Part II: Posterior tooth visibility. , 1981, The Journal of prosthetic dentistry.

[22]  R. Smales,et al.  Effects of subgingival restorations in beagle dogs. Part II: Gingivitis. , 1979, The Journal of prosthetic dentistry.

[23]  M. Listgarten,et al.  Relative distribution of bacteria at clinically healthy and periodontally diseased sites in humans. , 1978, Journal of clinical periodontology.

[24]  P. Axelsson,et al.  The effect of a preventive programme on dental plaque, gingivitis and caries in schoolchildren. Results after one and two years. , 1974, Journal of clinical periodontology.

[25]  M. Listgarten.  Structure of the microbial flora associated with periodontal health and disease in man. A light and electron microscopic study. , 1976, Journal of periodontology.

[26]  W B Kaldahl,et al.  Current theories of crown contour, margin placement, and pontic design. , 1981, The Journal of prosthetic dentistry.

[27]  D. Donaldson.  The Etiology of Gingival Recession Associated with Temporary Crowns. , 1974, Journal of periodontology.