Longevity of resin-bonded fixed partial dental prostheses made with metal alloys

Abstract

ObjectivesThe purpose of this study was to evaluate the clinical performance of resin-bonded fixed partial dental prostheses (RBFPDPs) made with metal alloys.Materials and methodsThe retention of 311 RBFPDPs from 226 patients fabricated from 1983 to 2013 using an adhesive resin was clinically evaluated. Partial or complete debonding of the RBFPDP or framework fracture was considered a treatment failure. All data were obtained from clinical examinations, and missing data were censored at the date of the last available information. The effect of the following factors on survival rate were investigated: patient gender, location (maxilla/mandible and anterior/posterior), number of missing teeth, number of abutment teeth, framework structure, type of metal alloy, patient age at the point of cementation, cement type, and distinction of the treating dentist. Data were analyzed with the Kaplan–Meier survival tests, log-rank tests, and Cox regression analyses (α = 0.05).ResultsThe Kaplan–Meier survival rate was 41.2 % ± 6.5 % (standard error) at 28.8 years (last outcome event). Significant differences were found for patient age and treating dentist (p < 0.05). The risk of failure in younger patients was 1.7 times greater than that in older patients and that of inexperienced dentists was 2.0 times greater than that of dentist experienced and specialized in adhesive dentistry.ConclusionsWhen fabricating RBFPDPs for younger patients, mechanical preparation for bonding may be necessary in consideration of the risk for debonding. Experienced dentists may achieve better results.Clinical relevanceMastery of skills is necessary to ensure excellent prognoses for RBFPDPs.

An up to 43-year longitudinal study of fixed prosthetic restorations retained with 4-META/MMA-TBB resin cement or zinc phosphate cement

“…The long-term prognosis of restorations retained with composite luting cement and SB have been reported, with a survival rate of SB estimated to be 84.6% at 5 years, 68.5% at 10 years, 58.8% at 15 years, and 35.2% at 20 to 25 years. 23 The results from the present study showed a cumulative survival rate of 94.9% at 5 years, 91.8% at 10 years, and 78.4% at 15 years. The improvement may have been that the patient's age and the operating dentist influenced the prognosis of the restorations.…”

“…The improvement may have been that the patient's age and the operating dentist influenced the prognosis of the restorations. 23,24 Accordingly, the favorable results obtained in the present study may have been because most of the treatment was provided by a dentist with over 15 years of clinical experience. However, considering that the results of the examination of the long-term prognosis for ZPC did not vary much from those of existing reports, it seems more likely that the influence of the adhesive resin cement used was greater than that of the years of experience of the dentist.…”

“…As the application of resin cement requires several steps of adhesive surface conditioning, a relatively high risk of procedural errors has been reported. 23,24 The durability of resin cement has been reported, [25][26][27][28] and the composition of many adhesive resin cements has been changed, even under the same brand name, to improve the physical properties and ease of use. 18 However, the basic composition of SB has not been changed in the 36 years since its release.…”

Critical review about two myths in fixed dental prostheses: Full-Coverage vs. Resin-Bonded, non-Cantilever vs. Cantilever

“…A total of 780 papers were identified, 753 of which were excluded after a review. Two papers were also included based on a non-electronic search, leaving a total of 29 articles for inclusion in this review [ [14] , [15] , [16] , [17] , [18] , [19] , [20] , [21] , [22] , [23] , [24] , [25] , [26] , [27] , [28] , [29] , [30] , [31] , [32] , [33] , [34] , [35] , [36] , [37] , [38] , [39] , [40] , [41] , [42] ] ( Fig. 1 ).…”

“…As a result, the 15-year cumulative success/survival rates were 53.4/66.5% for the RBFDP group and 59.2/61.6% for the FDP group, indicating no significant difference. Curiously, Tanoue [ 36 ] evaluated the long-term clinical performance of several types of RBFDPs composed of metal alloys; the maximum observation period was 28.8 years, and the mean observation time was 13.9 years. In that study, 311 RBFDPs—both surface-retained (i.e., two-retainer) and combination type (i.e., retainer/full coverage crown)—from 226 patients were evaluated.…”