title: Clinician- and patient-reported long-term evaluation of screw- and cement-retained implant restorations: a 5-year prospective study.
abstract: The purpose of this study was to evaluate the survival and success of screw- versus cement-retained implant crowns over a 5-year period. This was a multi-center prospective cohort study, consisting of patients who had ≥1 dental implant placed and restored in the anterior maxilla over a 5-year period. The primary predictor variable was the type of restoration (screw- versus cement-retained). The outcome variables were clinician- or patient-reported measures related to soft tissue and restoration quality. Descriptive and bivariate statistics were computed to compare the screw- versus cement-retained groups. Kaplan-Meier statistics were computed for implant survival. Information was collected for 102 patients who had 214 implants placed during the study period. Complete data, amenable to analysis, were available for 99 (97.1%) patients and 193 (90.2%) implants. The restorations were approximately evenly divided between screw- (53.4%) and cement-retained (46.6%). Approximately 49% of patients in the sample were female; the sample's mean age was 47.3 ± 13.9 years; each patient had an average of 2.0 ± 1.0 implants placed and restored. The mean time from prosthesis placement (definitive) to study endpoint was 61.9 ± 10.6 months. The overall implant survival rate was 96.4%, with no statistically significant difference in survival between the screw- and cement-retained groups (p = 0.45). The majority of clinician- and patient-assessed outcomes were similar. The results of this study indicate that for the majority of clinician- and patient-assessed success parameters screw- and cement-retained restorations are equivalent in the anterior maxilla.
authors.affiliation: Department of Restorative Dentistry and Biomaterials Sciences, Harvard School of Dental Medicine, Boston, MA, USA.
authors.forename: Sami
authors.initials: S
authors.lastname: Sherif
authors.forename: Srinivas M
authors.initials: SM
authors.lastname: Susarla
authors.forename: Jae-Woong
authors.initials: JW
authors.lastname: Hwang
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Weber
authors.forename: Robert F
authors.initials: RF
authors.lastname: Wright
mesh_terms: D002484:Cementation / Q000379:methods*; D015331:Cohort Studies; D003442:Crowns; D059605:Dental Implant-Abutment Design / Q000592:standards; D015921:Dental Implants / Q000592:standards; D018772:Dental Marginal Adaptation; D003774:Dental Plaque Index; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design / Q000592:standards; D017268:Dental Prosthesis Retention / Q000295:instrumentation* / Q000592:standards; D019094:Dental Prosthesis, Implant-Supported; D004955:Esthetics, Dental; D005260:Female; D005500:Follow-Up Studies; D005881:Gingiva / Q000473:pathology; D005884:Gingival Hemorrhage / Q000145:classification; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008409:Mastication / Q000502:physiology; D008437:Maxilla / Q000601:surgery; D016876:Metal Ceramic Alloys / Q000737:chemistry; D008875:Middle Aged; D017060:Patient Satisfaction; D010512:Periodontal Index; D011446:Prospective Studies; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D015921:Dental Implants; D016876:Metal Ceramic Alloys; D003776:Dental Porcelain
references.citation: Clin Oral Implants Res. 2006 Aug;17(4):375-9
references.pmid: 16907767
references.citation: Int J Prosthodont. 1996 Jan-Feb;9(1):87-94
references.pmid: 8630181
references.citation: J Prosthodont. 1995 Sep;4(3):173-7
references.pmid: 8603207
references.citation: Clin Oral Implants Res. 2003 Feb;14(1):119-24
references.pmid: 12562374
references.citation: Int J Oral Maxillofac Implants. 2000 Nov-Dec;15(6):831-6
references.pmid: 11151582
references.citation: J Clin Periodontol. 1983 Nov;10(6):563-78
references.pmid: 6581173
references.citation: Clin Oral Implants Res. 2005 Apr;16(2):185-93
references.pmid: 15777328
references.citation: J Periodontol. 2003 Apr;74(4):446-50
references.pmid: 12747448
references.citation: J Clin Periodontol. 1990 Mar;17(3):145-52
references.pmid: 2319001
references.citation: Clin Oral Implants Res. 1996 Mar;7(1):11-9
references.pmid: 9002818
references.citation: Int J Oral Maxillofac Implants. 1997 Jan-Feb;12(1):106-12
references.pmid: 9048462
references.citation: J Periodontal Res. 1974;9(1):50-5
references.pmid: 4277603
references.citation: Anat Rec. 1996 Jun;245(2):410-25
references.pmid: 8769676
references.citation: Oral Microbiol Immunol. 1987 Dec;2(4):145-51
references.pmid: 3507627
references.citation: J Periodontol. 2003 May;74(5):571-8
references.pmid: 12816287
references.citation: J Prosthet Dent. 2004 Jun;91(6):532-7
references.pmid: 15211294
references.citation: J Periodontol. 1998 Aug;69(8):857-64
references.pmid: 9736367
references.citation: Scand J Plast Reconstr Surg Suppl. 1977;16:1-132
references.pmid: 356184
references.citation: Int J Oral Maxillofac Implants. 1997 Sep-Oct;12(5):660-5
references.pmid: 9337028
references.citation: Int J Oral Maxillofac Implants. 1989 Fall;4(3):211-7
references.pmid: 2700745
references.citation: Int J Oral Maxillofac Implants. 1997 Jan-Feb;12(1):32-42
references.pmid: 9048452
references.citation: Clin Oral Implants Res. 2002 Aug;13(4):343-8
references.pmid: 12175370
references.citation: J Prosthet Dent. 1991 May;65(5):650-7
references.pmid: 2051387
references.citation: J Prosthet Dent. 1996 May;75(5):540-4
references.pmid: 8709021
references.citation: Acta Odontol Scand. 1970 Dec;28(6):895-904
references.pmid: 5277414
references.citation: J Dent Res. 1956 Apr;35(2):323-5
references.pmid: 13319560
references.citation: J Prosthet Dent. 2001 May;85(5):461-5
references.pmid: 11357072
references.citation: Clin Oral Implants Res. 1998 Aug;9(4):209-17
references.pmid: 9760895
references.citation: J Prosthet Dent. 1980 Feb;43(2):168-73
references.pmid: 6928028
references.citation: Clin Oral Implants Res. 1997 Jun;8(3):161-72
references.pmid: 9586460
references.citation: J Clin Periodontol. 2004 Mar;31(3):200-7
references.pmid: 15016024
references.citation: Int J Oral Maxillofac Implants. 1999 May-Jun;14(3):369-78
references.pmid: 10379110
references.citation: Int J Oral Surg. 1981 Dec;10(6):387-416
references.pmid: 6809663
references.citation: J Periodontol. 2009 Aug;80(8):1220-30
references.pmid: 19656021
references.citation: J Prosthet Dent. 1989 Sep;62(3):264-9
references.pmid: 2681694
references.citation: Clin Oral Implants Res. 2009 Jan;20(1):79-86
references.pmid: 19126111
references.citation: Clin Oral Implants Res. 1990 Dec;1(1):33-40
references.pmid: 2099210