Stress Study of Removable Partial Denture with Attachments Using Finite Element Analysis

2014 ◽  
Vol 658 ◽  
pp. 389-394
Author(s):  
Oana Cella Andrei ◽  
Livia Alice Tanasescu ◽  
Ruxandra Margarit ◽  
Mircea Horia Tierean
Keyword(s):  
3D Model ◽  
Sagittal Plane ◽  
Simulation Software ◽  
Von Mises Stress ◽  
Removable Partial Denture ◽  
Maximum Displacement ◽  
Partial Denture ◽  
Rotational Movement ◽  
Anterior Teeth ◽  
First Case

The paper presents the study of the stresses and the displacements that appear in different areas of the removable partial denture (RPD) with extracoronal attachments under occlusal loading, using FEA. The first step was to create the 3D model of a RPD with ball attachments in case of a class I Kennedy edentulous patient with all six anterior teeth as abutments. All materials were considered homogeneous, isotropic and having linear elasticity. There were assumed two types of constraints: in the first one the model is fixed under the action of the mastication forces; in the second one the rotational movement of the denture’s saddles in the sagittal plane was simulated, towards the edentulous ridge. In the first case, the 3D model and FEA were developed using Autodesk Inventor 2013 software. In the second case, the FEA was done using Autodesk Algor Simulation software. The loading of the model was symmetrically applied, considering the magnitude of the tangential and normal oral forces determined by Las Casas et al. These forces were applied to all the PM1, PM2, M1 and M2 pairs. Each loading case was analysed separately. The results of the two constrain situations are presented graphically, comparatively and show that the amount of the saddle displacement depends on the application area of the mastication force. Maximum displacement was computed at the application of the mastication forces on the M2 and decreases as the force is applied more mesial. The amount of the major connector’s deformation is very little influenced by the site of the force. The largest displacement of the denture was recorded at the distal end of the saddle, with values ​​that depend on the site of the forces. The existence of the rotational movement of the denture’s free end saddles in the sagittal plane, towards the edentulous ridge, changes the values ​​of accumulated stresses in denture during mastication and its Von Mises stress peaks. This analysis can be use to establish the principles of planning and designing the RPD with ball attachments having in mind to minimize the number of repairs caused by fractures of the components.

scholarly journals Esthetic Rehabilitation with a Cast Partial Denture

2017 ◽  
Vol 12 (4) ◽  
pp. 189-192
Author(s):  
Suraksha Shrestha ◽  
Sanjay Sah
Keyword(s):  
Treatment Option ◽  
Anterior Region ◽  
Missing Teeth ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Anterior Teeth ◽  
Fixed Prosthesis

Removable partial denture is a treatment option where fixed prosthesis is not indicated. Due to its esthetic problems in the anterior region various modifications have been designed for its fabrication. This article describes an esthetic alternative using a round rest distal depression clasp for maxillary anterior teeth abutment while restoring the missing teeth with a cast partial denture.

scholarly journals Smile regeneration by prosthodontic way- a case report

1970 ◽  
Vol 11 (1) ◽  
pp. 57-60
Author(s):  
D Sunil ◽  
P Rajesh ◽  
D Neha
Keyword(s):  
Patient Treatment ◽  
Clinical Report ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Fixed Partial Denture ◽  
Anterior Teeth ◽  
Form Function ◽  
Dentofacial Deformity ◽  
Metal Ceramic ◽  
Clinical Problems

The realization of esthetic objectives and functional demands in the reconstruction of severely compromised dentition represents considerable clinical problems. This clinical report represents the prosthetic management of a severe dentofacial deformity with compromised periodontal status. Treatment objectives were based on Aesthetics enhancement, sociopsychological support of the patient, restoration of form function, phonetics and comfort. Following which extraction of upper incisors and alveoloplasty done. An immediate removable partial denture was fabricated, considering aesthetics, phonetics and comfort of the patient followed by replacement of incisors by metal- ceramic fixed partial denture done. Clinical relevance: prosthetic management of severlymalaligned natural maxillary anterior teeth by fixed partial denture, considering aesthetics and phonetics of the patient. Treatment objectives: Aesthetics enhancement, sociopsychological support of the patient, restoration of form function, phonetics and comfort. DOI: http://dx.doi.org/10.3329/bjms.v11i1.9825 BJMS 2012; 11(1): 57-60

scholarly journals Prosthodontic Rehabilitation of Patients with Double Crown and Locator Attachment - Retained Overdentures Supported by a Combination of Natural Tooth and Strategic Implants: Case Series

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Marko Milosavljevic ◽  
Milica Jovanovic ◽  
Dejan Zdravković ◽  
Jelena Todic ◽  
Jelena Eric
Keyword(s):  
Dental Implants ◽  
Case Series ◽  
Treatment Modalities ◽  
Prosthetic Rehabilitation ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
First Case ◽  
Dental Office ◽  
Food And Drink ◽  
Edentulous Patients

Abstract Prosthetic rehabilitation of edentulous patients and patients with one or two own teeth can be established by different treatment modalities. The most commonly used in the treatment of these patients is conventional complete denture or removable partial denture. However, due to increasing problems with this type of therapy, such as insufficient retention, stability, comfort and pain during mastication, it is suggested an overdenture supported by two natural teeth or implants. We will present series of clinical reports. In two clinical cases patients came to the dental office because of the impossibility of wearing lower partial denture, and in one case patient had problems with the upper partial denture. After clinical examination and radigraphic analysis, in all patients, dental implants were implanted. In first case there were implanted two dental implants in the region 41 and 43, in second case it was region 33, and in third case implanatiton is performed in the region of 14, 11, 21. Prosthetic rehabilitation was done after 3-months bone oseointegration period. The treatment consisted in the production of double crowns and overdentures that are retained with locator attachment. This design of the denture significantly improves the quality of patient’s life (the dentures are stable, chewing is improved, the feeling of thermal sensations of food and drink is present, the feeling of taste is complete, and the psychological patient becomes safer).

scholarly journals SOLUÇÕES ESTÉTICAS PARA PRÓTESES PARCIAIS REMOVÍVEIS RETIDAS POR GRAMPOS METÁLICOS

2013 ◽  
Vol 4 (2) ◽  
Author(s):  
Guilherme Andrade Meyer ◽  
Francisco Oliveira Júnior ◽  
Luciana Valadares Oliveira ◽  
Bruno Peixoto de Souza ◽  
Felipe Vilasboas Rodrigues ◽  
...  
Keyword(s):  
Treatment Options ◽  
Metal Structure ◽  
Anterior Region ◽  
Class Iii ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Stomatognathic System ◽  
Anterior Teeth ◽  
Edentulous Patients ◽  
Clinical Cases

The construction of a removable partial denture (RPD) aims the replacement of lost dental units, incorporating them into the stomatognathic system, without harming the biomechanical balance. Besides, there is a great challenge today, of combining function and esthetics. The difficulty in achieving esthetic harmony by the presence of metal clasps on labial surfaces of anterior teeth justify studies aimed at solving this problem in the RPDs. There is still the fact that this procedure is simpler and less costly for the patient compared to other treatment options. Therefore, this study presents esthetic solutions for RPD and suggests the comparison among conventional metal clasps on buccal retainers with clips in the palatal area, through three clinical cases of patients with partial absence of anterior dental units. Two prosthetic pieces for each patient were made: 1) prioritizing only the biomechanical principles and 2) considering both the biomechanical and cosmetic principles. It was observed that MDL and Quereilhac clasps are viable alternatives to get esthetics in RPDs of anterior edentulous patients with Class III and IV of Kennedy. Therefore, it can be concluded that there was an improvement in smile of individuals partially edentulous in the anterior region, by not viewing the metal structure on the buccal area of the teeth.

scholarly journals Fractographic analysis of two fractured removable partial denture metal frameworks

2021 ◽  
Vol 10 (10) ◽  
pp. e08101018370
Author(s):  
Jussara da Silva Barbosa ◽  
Elisa Diniz de Lima ◽  
João Baptista Costa Agra de Melo ◽  
André Ulisses Dantas Batista ◽  
João Paulo Silva Neto ◽  
...  
Keyword(s):  
Casting Process ◽  
Energy Dispersive ◽  
Chemical Mapping ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
X Ray ◽  
Material Fatigue ◽  
First Case ◽  
Metal Framework ◽  
Possible Cause

This study aimed to analyze two cases of fracture of the metal framework of Co-Cr-based removable partial dentures, using fractography to identify a true cause of these failures. The first case concerned the coupling between the smaller and larger connectors; the patient brought his fractured removable partial dentures to the clinic. The second case referred to a larger connector; structure of the patient fractured during the test.  For failure analysis, images of two fractured metal frameworks were taken by scanning electron microscopy to identify the origin of the fracture and to determine the mechanisms involved in the process. Subsequently, energy dispersive X-ray spectroscopy was used for elemental chemical mapping of the fracture interface. The fractography indicated material fatigue as a possible cause in the first case and an error in the casting process in the second. The energy dispersive X-ray spectroscopy test, performed in the specimen of case B, showed predominant and characteristic peaks for Co and Cr, with a higher concentration of chromium. The fractures identified were associated with inclusions and with material fatigue and a number important characteristics were evidenced by the technique.

Rotational Path of Insertion for Removable Partial Dentures with an Anterior Saddle

2003 ◽  
Vol os10 (1) ◽  
pp. 13-16 ◽  
Author(s):  
Kevin H-K Yip ◽  
Daniel T-S Fang ◽  
Roger J Smales ◽  
Philip RH Newsome ◽  
Tak W Chow
Keyword(s):  
Treatment Modality ◽  
Case Reports ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Anterior Teeth ◽  
Partially Dentate ◽  
Viable Treatment

The provision of removable partial dentures remains a viable treatment modality for many partially dentate patients. Replacing missing anterior teeth with a removable partial denture using a rotational path of insertion provides improved retention and appearance. The use of a rotational path of insertion also provides additional retention for a removable partial denture restoring combined anterior and posterior bounded saddles. Two case reports demonstrate the use of the rotational path of insertion for partial denture design.

scholarly journals Signs of Combination Syndrome and removable partial denture wearing

2014 ◽  
Vol 43 (6) ◽  
pp. 390-395 ◽  
Author(s):  
Camila Maria Bastos Machado de Resende ◽  
Jaiane Augusta Medeiros Ribeiro ◽  
Kássia de Carvalho Dias ◽  
Adriana da Fonte Porto Carreiro ◽  
Michel Platini Pereira do Rego ◽  
...  
Keyword(s):  
Bone Resorption ◽  
Pathological Condition ◽  
Clinical Signs ◽  
Chi Square ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Anterior Teeth ◽  
Significant Difference ◽  
Chi Square Test ◽  
Papillary Hyperplasia

Introduction: Combination Syndrome (CS) is a pathological condition observed in maxillary complete denture (CD) and mandibular removable partial denture (RPD) wearers. Purpose: The aim of this study was to observe and measure the prevalence of CS signs in treatment-seeking wearers of maxillary CD associated or not with RPD (mandibular Kennedy Class I). The association between RPD wearing and the number of CS clinical signs was also evaluated. Material and method: The sample included 62 patients seen at the Department of Dentistry, Federal University of Rio Grande do Norte (UFRN). A clinical oral examination was conducted to assess the presence of specific clinical signs of CS as described by Kelly (1972): bone resorption in the maxillary anterior region, tuberosity overgrowth, palatal papillary hyperplasia, extrusion of mandibular anterior teeth and bone resorption in the mandibular posterior region. The chi-square test at the 95% level of significance was used to test the association between dependent and independent variables. Result: Mandibular resorption was the most frequent complication (93.5%). There was a statistically significant difference between RPD wearers and non-wearers with regard to extrusion of mandibular anterior teeth (p = 0.045). Conclusion: Within the limitations of the present study, a high prevalence of CS clinical signs was observed, but no association between RPD wearing and syndrome characteristics was found.

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