scholarly journals On the ferrule effect and the biomechanical stability of teeth restored with cores, posts, and crowns

2014 ◽  
Vol 08 (02) ◽  
pp. 281-286 ◽  
Author(s):  
John S. Mamoun
Keyword(s):  
Dental Prosthesis ◽  
High Magnification ◽  
Operating Microscope ◽  
Biomechanical Stability ◽  
Partial Denture ◽  
Tooth Structure ◽  
Fixed Partial Denture

ABSTRACTAn abutment for a fixed partial denture may not contain enough tooth structure, such that the abutment does not provide an adequate ‘ferrule effect’. A crown or bridge dental prosthesis that is cemented onto such an abutment/s may undergo biomechanical failure. Here, the tooth, core, and post complex, on which the crown is cemented, may fracture off from the abutment, causing the crown to separate from the abutment, while the cement that bonds the crown to the tooth, core, and post complex remains intact, such that the tooth, core, and post complex remains inside the crown when the crown separates from the abutment. This article reviews the dentistry literature on the ferrule effect, and presents alternative definitions for terms such as ferrule, the ferrule effect, and the ferrule tooth structure. The article also explains how the use of a surgical operating microscope, or high magnification binocular surgical loupes of ×6-8, or greater magnification improve the ability of a dentist to assess how much ferrule tooth structure an abutment contains, compared to the use of unaided vision.

scholarly journals Sobrevida de prótese parcial fixa posterior em zircônia: revisão sistemática de estudos clínicos com até 7 anos de acompanhamento

Cerâmica ◽  
2016 ◽  
Vol 62 (361) ◽  
pp. 71-76
Author(s):  
P. L. P. da Silva ◽  
G. A. Lemos ◽  
R. F. Bonan ◽  
J. R. C. Queiroz ◽  
A. U. D. Batista
Keyword(s):  
Dental Prosthesis ◽  
Partial Denture ◽  
Dental Porcelain ◽  
Fixed Partial Denture

Resumo A cerâmica odontológica tem sofrido modificações na composição visando melhorar sua resistência em resistir às forças mastigatórias fisiológicas na região posterior da boca. O objetivo deste trabalho foi avaliar o comportamento clínico de próteses parciais fixas posteriores (PPFs) em zircônia a partir de estudos clínicos prospectivos de 3 anos ou mais. Realizou-se revisão sistemática da literatura por meio de pesquisa na base de dados PubMed em busca de publicações em inglês entre os anos de 2004 e 2014 com os seguintes descritores e suas combinações: 'fixed partial denture' OR 'dental prosthesis' OR 'dental porcelain' OR 'FPD' AND 'zirconia'. A busca resultou em 282 artigos, 20 foram lidos na íntegra e então oito selecionados. Os sistemas de zircônia utilizados foram Lava (3M ESPE), Cercon (DeguDent) e Denzir (Cad.esthetics) com cimentação variando entre resinosa, com ionômero de vidro e fosfato de zinco. A quantidade total de pacientes examinados foi de 199, com 241 próteses instaladas, avaliados em um período de 3 a 7 anos. Destas, oito apresentaram fratura da infraestrutura em zircônia, 41 sofreram fratura apenas da cerâmica de recobrimento e 17 tiveram perda de retenção sem fratura; 17 dentes pilares sofreram cárie secundária, três fraturaram e nove necessitaram de tratamento endodôntico. A taxa de sobrevida das PPFs variou de 73,9% a 100%. Concluiu-se que a zircônia está apta a ser utilizada na região posterior, porém estudos são necessários para averiguar as causas das lascas do revestimento. Mediante as falhas na cimentação, recomenda-se seguir rigorosamente as instruções do fabricante e atentar para um preparo dental adequado.

scholarly journals The total occlusal convergence of the abutment of a partial fixed dental prosthesis: A definition and a clinical technique for its assessment

2013 ◽  
Vol 07 (04) ◽  
pp. 509-513 ◽  
Author(s):  
John S. Mamoun
Keyword(s):  
Dental Prosthesis ◽  
Experimental Results ◽  
High Magnification ◽  
Operating Microscope ◽  
Alternative Definition ◽  
Fixed Dental Prosthesis ◽  
Definition Of ◽  
The Ideal

ABSTRACTThe abutment(s) of a partial fixed dental prosthesis (PFDP) should have a minimal total occlusal convergence (TOC), also called a taper, in order to ensure adequate retention of a PFDP that will be made for the abutment(s), given the height of the abutment(s). This article reviews the concept of PFDP abutment TOC and presents an alternative definition of what TOC is, defining it as the extent to which the shape of an abutment differs from an ideal cylinder shape of an abutment. This article also reviews experimental results concerning what is the ideal TOC in degrees and explores clinical techniques of estimating the TOC of a crown abutment. The author suggests that Dentists use high magnification loupes (×6-8 magnification or greater) or a surgical operating microscope when preparing crown abutments, to facilitate creating a minimum abutment TOC.

Metal-Ceramic Screw-Retained Implant Fixed Partial Denture With Intraoral Luted Framework to Improve Passive Fit

2012 ◽  
Vol 38 (2) ◽  
pp. 149-153 ◽  
Author(s):  
Mirza Rustum Baig ◽  
Rajan Gunaseelan
Keyword(s):  
Dental Prosthesis ◽  
Partial Denture ◽  
Long Span ◽  
Fixed Partial Denture ◽  
Fixed Dental Prosthesis ◽  
Metal Ceramic ◽  
Passive Fit ◽  
Implant Prosthesis

Passive fit of a long-span screw-retained implant prosthesis is an important criteria for the success of the restoration. This article describes a technique for fabricating a ceramometal implant fixed dental prosthesis (FDP) for a long-span partially edentulous situation by altering the conventional screw-retained design. The possibility of a passive fit is maximized by intraoral luting of the cast frame to milled abutments, and the potential framework distortion during fabrication is compensated to a major extent. Retrievability is ensured by screw retention of the prosthesis to the implants. Compared with conventional porcelain fused to metal screw-retained FDP, this prosthesis is relatively inexpensive to fabricate.

scholarly journals Oral Hygiene and Gingival Health in Patients with Fixed Prosthodontic Appliances - A Six Month Follow-up

2017 ◽  
Vol 13 (4) ◽  
pp. 328-332 ◽  
Author(s):  
Basnyat S KC ◽  
B. Sapkota ◽  
S. Shrestha
Keyword(s):  
Oral Hygiene ◽  
Dental Prosthesis ◽  
Plaque Index ◽  
Diagnostic Tools ◽  
Gingival Index ◽  
Partial Denture ◽  
Fixed Partial Denture ◽  
Fixed Dental Prosthesis ◽  
Single Crown ◽  
Significant Difference

Background Gingival inflammation and periodontal disease are the common complications of fixed dental prosthesis. They can be overcome by good oral hygiene maintenance.Objective The objective of this study was to assess the oral hygiene and gingival condition in patients after placement of fixed dental prosthesis for a period of six months. It was also analyzed how factors like type of fixed dental prosthesis (Single crown, fixed partial denture) and material (Metal, Porcelain fused to metal) are statistically associated with oral hygiene and gingival health.Method The sample consisted of 50 patients visiting the Dental Outpatient Department of Dhulikhel Hospital. The oral examinations were conducted using basic diagnostic tools (Mouth mirror, periodontal probe and explorer). Teeth and gingiva were examined using the Plaque and Gingiva Index by Silness and Löe. The examinations were conducted after 14 days and six months after placement of fixed dental prosthesis along with the oral hygiene instructions. Paired sample t-test were done to find statistical association using SPSS 16.0.Result Our results revealed no significant difference in plaque index among patients with single crown whereas fixed partial denture showed statistical significance. No significant differences were found for type of material. The statistical analysis showed similar results for gingival index.Conclusion Our research showed that single crown had no significant difference on Plaque index and Gingival index of the patient after 14 days and six months, whereas, Fixed partial denture showed significant difference. Both metal and porcelain fused to metal crown revealed no statistically significant difference on Plaque index and Gingival index.

scholarly journals The Use of Newer High Translucency Zirconia in Aesthetic Zone

2014 ◽  
Vol 2014 ◽  
pp. 1-3
Author(s):  
Zishan Dangra ◽  
Mahesh Gandhewar
Keyword(s):  
Tooth Enamel ◽  
Clinical Report ◽  
Basic Principles ◽  
Mandibular Incisor ◽  
Partial Denture ◽  
Tooth Color ◽  
Tooth Structure ◽  
Fixed Partial Denture ◽  
Increased Risk ◽  
Enamel Glass

Loss of anterior tooth causes aesthetic and functional disharmony. Although no restorative material can approach the appearance of intact tooth enamel, glass ceramic, at the increased risk of brittle fracture, can mimic original tooth color better than the other restorative options. The newest zirconia material comes with unparalleled individualization in aesthetics and optimal physical properties. One of the basic principles of tooth preparation is conservation of tooth structure. This clinical report describes the replacement of maxillary and mandibular incisor with latest generation zirconia adhesive fixed partial denture. The authors have achieved unmatched aesthetics with newer high translucency zirconia.

scholarly journals Pink Tooth of Mummery in the Maxillary Left Canine after Fixed Partial Denture (FPD) Preparation

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Eger V. Korolevsky ◽  
Takashi Komabayashi ◽  
Denise Foran
Keyword(s):  
Case Report ◽  
Heat Generation ◽  
Dental Prosthesis ◽  
Partial Denture ◽  
Caucasian Male ◽  
Fixed Partial Denture ◽  
Unusual Occurrence ◽  
Tooth Preparation

Pink tooth of Mummery is typically found after trauma. However, this case report describes an unusual occurrence of pink tooth in a 67-year-old Caucasian male after fixed partial denture (FPD) tooth preparation. Pink tooth in this case may be due to one or more factors: tooth reduction and heat generation during tooth preparation; heat generation during polymerization of provisional material; and hyperocclusion of a provisional FPD. This case highlights the importance of choosing the appropriate materials and techniques to avoid pulpal complications after dental prosthesis work.

CLINCIAL EVALUATION OF COMPLICATIONS ASSOCIATED WITH TOOTH SUPPORTED FIXED PARTIAL DENTURE AMONGST PATIENT VISITING DENTAL COLLEGE IN GHARWA.

2021 ◽  
pp. 65-70
Author(s):  
Bineet Kumar ◽  
Rakesh Ranjan ◽  
Akash Raj Sharma ◽  
Md Kashif Noorani ◽  
Neeraj Neeraj ◽  
...  
Keyword(s):  
Periodontal Disease ◽  
Dental Prosthesis ◽  
Clinical Failure ◽  
Treatment Procedure ◽  
Partial Denture ◽  
Fixed Partial Denture ◽  
Tooth Roots ◽  
Natural Teeth ◽  
Primary Support ◽  
Detailed Questionnaire

Introduction: Any dental prosthesis that is luted, screwed, or mechanically attached or otherwise securely retained to natural teeth, tooth roots, and/or dental implants/abutments that furnish the primary support for the dental prosthesis and restoring teeth in a partially edentulous arch; the patient cannot remove it. There are three main types of failures Biologic failure, mechanical failure and aesthetic failure. Clinical failure may occur during or after xed prosthodontic treatment procedure. Failure and complications associated with xed prostheses include, but not limited to the loss of retention, caries, endodontic complications, periodontal disease, tooth fracture or porcelain fracture, and unsatisfactory esthetics of the prosthesis. When a crown or Fixed Partial Introduction Dentures (FPD) fails, the primary question is whether the problem can be easily resolved, or requires extensive rehabilitation and reconstruction. A mild failure may be considered one that is generally correctable without having to remake the restoration. Aim: To evaluate the post-operative complaints of patients having crowns & xed partial dentures by means of a simple questionnaire & clinical examination. Material & Methods: A total of 190 patients satisfying the criteria for inclusion in this study were identied. Forty seven of these patients could not be reached, Out of 143 patients who were contacted & 110 responded positively, the rest were not able to avail themselves for review due to various reasons. 100 subjects wearing xed partial denture either anterior or posterior three Unit Bridge or crowns were selected randomly out of 110 patients. The Study was conducted with detailed questionnaire and was planned to get patients response. The questionnaire was divided into 4 parts which included. Results: There was a statistically signicant / highly signicant difference seen for the frequencies between the groups (p<0.01, 0.05) For frequent Dislodgement with higher frequency for yes with position 2 (maxillary posterior) and 4 (mandibular posterior) There was a statistically nonsignicant difference seen for the frequencies between the groups (p>0.05) for all other questions

scholarly journals Hemisection- A Saviour for Periodontally & Cariously Involved Permanent Mandibular Molar

2021 ◽  
pp. 1-3
Author(s):  
Manisha Yadav ◽  
◽  
Shilpi K Pandey ◽  
Poonam Agrawa ◽  
Devikarani S Khurpade ◽  
...  
Keyword(s):  
Treatment Options ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Tooth Structure ◽  
Form And Function ◽  
Proper Form ◽  
Fixed Partial Denture ◽  
Fixed Dental Prosthesis ◽  
Mandibular Molar ◽  
And Function

Progressive carious and inflammatory involvement of teeth if left untreated will ultimately lead the loss of tooth structure in the oral cavity. Earlier clinician was left with no option but extraction of such hopeless teeth followed by replacement with fixed partial denture, removable partial denture or implants. Hemisection is a removal of compromised root and the associated crown portion. It is one of the treatment options for preserving remaining part of molar having sound periodontium. This case report presents a patient in which distal half of the teeth was carious but with sound periodontium and the periodontally compromised mesial root was resected, and after healing, fixed dental prosthesis was delivered to restore proper form and function

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