title: Effect of misfit of cement-retained implant single crowns on crestal bone changes.
abstract: The purpose of this clinical study was to compare peri-implant crestal bone levels between misfitting (overhanging/open margin) cement-retained implant single crowns (SCs) vs accurately fitted implant SCs. Seventeen subjects were divided into two groups: test group (misfitting crowns, n = 10) and control group (accurately fitted crowns, n = 7). Crestal bone level changes were assessed using digital software. The average differences in mean bone loss within and between the two groups were statistically significant. Cement-retained implant SCs with marginal misfit resulted in more crestal bone loss than accurately fitted crowns after a mean of 3 years in function.
authors.affiliation: Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston, Massachusetts 02115, USA.
authors.forename: Chun-Jung
authors.initials: CJ
authors.lastname: Chen
authors.forename: Panos
authors.initials: P
authors.lastname: Papaspyridakos
authors.forename: Kevin
authors.initials: K
authors.lastname: Guze
authors.forename: Medha
authors.initials: M
authors.lastname: Singh
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Weber
authors.forename: German O
authors.initials: GO
authors.lastname: Gallucci
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000209:etiology; D000539:Alveolar Process / Q000000981:diagnostic imaging / Q000473:pathology*; D003442:Crowns; D003738:Dental Cements / Q000737:chemistry*; D015921:Dental Implants; D018772:Dental Marginal Adaptation; D017267:Dental Prosthesis Design; D017268:Dental Prosthesis Retention / Q000379:methods*; D019094:Dental Prosthesis, Implant-Supported; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012189:Retrospective Studies; D012984:Software; D013499:Surface Properties
chemical_list: D003738:Dental Cements; D015921:Dental Implants