Marginal integrity of metal copings of various porcelain fused to metal alloys using different ring casting techniques: A systematic literature review

Singh, Devvrat; Nishad, Sumita Giri; Sharma, Mohit; Sareen, Anurag

doi:10.4103/2347-4610.122988

Cited by 4 publications

(3 citation statements)

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“…5 Technicianrelated errors are improper pattern making, suboptimal casting of metal core leading to marginal gaps, improper layering of porcelain, inappropriate firing of porcelain or incorrect surface finish leading to excessive plaque retention. 6 Multiple studies have reported about the survival of PFM crowns, [5][6][7] such as 94% after 10 years. 5 95.5% over three years, 8 and 85% after five years.…”

Section: Introductionmentioning

confidence: 99%

Five year evaluation of the complications observed in porcelain fused to metal (PFM) crowns placed at a university hospital

Jamal¹,

Ghafoor²,

Khan³

et al. 2020

J Pak Med Assoc

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Various complications are observed in the PFM crowns. These include chipped-off ceramic, recurrent caries and / or loss of retention. 4,5 Multiple factors are responsible for or are associated with these complications. These are broadly categorised as patient-related, operator-related and technician-related factors. Patient-related factors are para-function (clenching and bruxism), traumatic biting habits (biting on ice cubes, betel nuts etc.) and heavy occlusal forces. Operator-related problems include poor treatment planning, inadequate preparation of

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Section: Introductionmentioning

confidence: 99%

Five year evaluation of the complications observed in porcelain fused to metal (PFM) crowns placed at a university hospital

Jamal¹,

Ghafoor²,

Khan³

et al. 2020

J Pak Med Assoc

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“…The dentist should always be aware in order to minimize the errors during the complicated prosthetic procedures and to the his responsibilities inherent to each one involved in the treatment (8) . It is imperative to understand that a successful fixed prosthodontic practice requires knowledge of sound biological and mechanical principles involved in abutment selection and subsequent preparation techniques.…”

Section: Discussionmentioning

confidence: 99%

The Preparation Faults Manifesting As Finish Line Defects

A. H. Mohamed

2017

Libyan J Dent

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This study was done to evaluate different finish line defects due to fault preparation, In addition to that to determination of their locations (upper, lower, anterior, posterior). Methods: 175 working casts with different finish line defects (common errors and mistakes happens in the finish line) were collected from various dental laboratories in Benghazi. The working casts were classifiedto five groups according to the type of the finish line defect. group (1): Unidentifiable or light finish line,group (2): The finish line Not continuous, group (3): Double or several finish lines, group (4): Rough finish line and group( 5): Nodules on finish line. The collected data have analyzed statically. Each group subdivided into two divisions (upper, lower) then each division divided into three subgroups (Anterior, premolar, Molar) according to position of tooth in the arch.Results: The percentage for incidence of each group were as follow Group (1) = 30% mostly in lower molars and upper premolars (40.4%, 32.7%) respectively. Group (2) =24% the highest percentage in lower molar (33.3%). Group (3) =16% the highest was 39.3% of them occur in lower molars also. Group (4) = 22% with (35.9%, 23.1%) in lower molars and upper molars respectively. Group (5) = 8% mostly in lower molars (35.7%). independent-samples t-test was conducted which revealed lower molars are the most significant for all the subdivisions (M13, SD5.8) t(4)=5, p=0.07Conclusion: The careful inspection of the finish line on the working cast is an essential critical step for obtaining a restoration with an accurate marginal integrity .

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“…Many studies have shown the survival rate of PFM crowns to be 94% after ten years. 5 Such studies have not been done in our setup to find out the complications post-PFM cementation. This study aimed to find out the common complications seen in PFM cases done at the College of Dental Surgery, Gandaki Medical College.…”

Section: Introductionmentioning

confidence: 99%

Complications of porcelain fused to metal crowns after five years of cementation at a tertiary care center in Kaski

Tuladhar,

Manandhar,

Thapa

et al. 2024

JGMC-Nepal

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Introduction: Porcelain fused to metal (PFM) crowns are given to restore badly broken down teeth, to reinforce root canal treated teeth. The common complications are chipped-off porcelain, open contact, dental caries of an abutment, dental caries of adjacent teeth, fracture of an abutment, dislodged crowns, and periodontal problems. Methods: This was a hospital-based cross-sectional study conducted at the outpatient department of Prosthodontics, College of Dental Surgery, Gandaki Medical College. The patients of age group 25 to 50 years who had undergone PFM crowns minimum of five years back in the Department of Prosthodontics were examined for complications of chipped-off porcelain, open contact, periodontal pocket, dislodged crowns, fracture of abutment tooth, caries in abutment and caries in adjacent teeth. Results: The average age was 40.85 ± 8.74 years. The average duration post-cementation of porcelain fused to metal crowns was 6.15±1.52 years. The complications were open contacts 23(28.8%), chipped off porcelain crowns 10(12.5%), periodontitis 4(5.0%), dislodged crown 7(8.8%), fractured abutment 2(2.5%), dental caries in abutment teeth 2(2.5%) and dental caries in adjacent teeth 3(3.8%). Conclusions: The most common complication in porcelain fused to metal crowns post five years of cementation was open contact followed by chipped-off crowns and periodontitis.

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Marginal integrity of metal copings of various porcelain fused to metal alloys using different ring casting techniques: A systematic literature review

Cited by 4 publications

References 0 publications

Five year evaluation of the complications observed in porcelain fused to metal (PFM) crowns placed at a university hospital

Five year evaluation of the complications observed in porcelain fused to metal (PFM) crowns placed at a university hospital

The Preparation Faults Manifesting As Finish Line Defects

Complications of porcelain fused to metal crowns after five years of cementation at a tertiary care center in Kaski

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