Unserviceable Crowns and Fixed Partial Dentures: Life-Span and Causes for Loss of Serviceability

Schwartz, Norman L.; Whitsett, Lowell; Berry, T. G.; Stewart, Jack L.

doi:10.14219/jada.archive.1970.0398

Cited by 217 publications

(130 citation statements)

References 2 publications

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“…Several clinical studies [1][2][3] reported that fixed partial dentures on natural teeth had a mean life span of 5 to 13 years, while implant-supported fixed prostheses demonstrated a survival rate greater than 90% 4,5) at 10 to 15 years. These findings suggest that prosthetic treatments using dental implants are comparable to traditional prosthetic procedures in carefully selected clinical cases.…”

Section: Introductionmentioning

confidence: 99%

Retention of crowns cemented on implant abutments with temporary cements

2014

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This study was to examine the retentive force of crowns to implant abutments with commercial temporary cements. Six different temporary cements were investigated. Cast crowns were cemented to the abutments using each cement and their retentive forces to abutments were determined 7 or 28 days after cementing (n=10). The retentive force of the cements to abutments varied widely among the products [27-109 N (7-day), 18-80 N (28-days)]. The retentive force of all the cements was not reduced as the time elapsed, except for two products tested. The polycarboxylate cements and paste-mixing type eugenol-free cements revealed comparable retentive force after 28 days of storage. The powder-liquid type cements showed a positive correlation (p<0.05) between the retentive force and the shear strength, while a negative correlation (p<0.05) was obtained for paste-mixing type cement between the retentive force and compressive strength. Mechanical strength of temporary cements could not be a prominent predicting factor for retention of the crowns on the abutments.

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Section: Introductionmentioning

confidence: 99%

Retention of crowns cemented on implant abutments with temporary cements

2014

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“…Walton et al 11 and Schwartz et al 12 found caries to be the most common reason for crown failure accounting for 22% and 37% of cases seen respectively. Loss of retention was also reported as the commonest reason for crown and fixed partial denture failure accounting for 28% 15 and 45% 14 in studies in Cameroun 15 and India 14 respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Studies 11,12 conducted among Americans revealed that secondary caries account for 22% and 37% of failure of crown and fixed partial denture and the mean service life of single crown was 8-9.4 years 11,12 . Technical failure was reported to be the most prevalent (8%) cause of failure of crowns in a study by Cheung 13 in HongKong.…”

Section: Introductionmentioning

confidence: 99%

Audit of Crown and Fixed Partial Denture in a Nigerian Teaching Hospital

2017

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Aim: The purpose of this investigation was to document the reasons for placement, and replacement of crowns and fixed partial denture in a Nigerian Teaching Hospital. Methods: a retrospective review of patients that had advanced conservative procedures. A data collection form was used to gather the relevant information from the patients' case notes. Section A sought information on age , gender, educational level, patients' occupation etc. Section B recorded information on tooth/teeth involved, reason for fabrication of prosthesis and material used. Results: Three hundred and twenty six had 398 crowns while 23 patients received bridges. Patients' ages ranged from 16-85 years with a mean of 47.7 ± 17.2 years and a male to female ratio of 1:1.3. Thirty five percent of the crowned teeth were in the upper right quadrant, followed by the upper left quadrant with 29.4%. Upper right central incisors were the most frequently (15.6%) crowned teeth. Endodontics and esthetics were the most common reasons for initial crown placement and replacement respectively. About 60% of bridges fabricated were new, while 22.2% of replaced bridges were due to fracture of porcelain and unacceptable marginal adaptation. Conclusion: Endodontics and esthetics were the most common reasons for initial crown placement and replacement

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“…Improving the retention of zirconia-based ceramics is desirable in order to avoid the decementation phenomena [11,12]. Loss of crown retention was found to be the second leading cause of failure of crowns and fixed partial dentures [13]. Uncemented restorations have been listed as the third leading cause of prosthetic replacement with failures occurring in varying periods of 1 to 38 month [11,12] and 5.8 y of service [14].…”

Section: Discussionmentioning

confidence: 99%