scholarly journals Finite Element Evaluation of the Effect of Adhesive Creams on the Stress State of Dentures and Oral Mucosa

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Anantha Narayanan Ramakrishnan ◽  
Oliver Röhrle ◽  
Christopher Ludtka ◽  
Roshan Varghese ◽  
Josephine Koehler ◽  
...  
Keyword(s):  
Finite Element ◽  
Soft Tissue ◽  
Oral Mucosa ◽  
Adhesive Layer ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Denture Adhesive ◽  
Denture Adhesives ◽  
Abutment Teeth

The base fit between a removable partial denture (RPD) and the underlying soft tissue plays a significant role in its performance. The application of a denture adhesive is hypothesized to result in better retention of RPDs and, as a result, contribute to lower stress on the oral mucosa. The objectives of this study were to observe and compare the distribution of simulated bite forces applied to the RPD through the abutments and soft tissue for models with and without the use of a denture adhesive. Furthermore, we evaluated the possible benefit of using a denture adhesive in lowering stresses on the oral mucosa. The RPD, mandible, oral mucosa, abutment teeth supporting the RPD, and the corresponding abutment periodontal ligaments (PDLs) were modelled as 3D volumes based on computer tomography (CT) datasets. A viscoelastic adhesive layer between the RPD and oral mucosa was incorporated into this base model using Prony series approximation. The layer was developed as a volume extract using the denture surface. Finite element (FE) simulations were performed for the bite force on one of the RPD segments, with the resulting force and moments experienced by the dental structures and oral mucosa compared between the model with the adhesive layer and the base model without. As a result, the contact pressure on the oral mucosa for the model with the denture adhesive decreased to 0.15 MPa as compared to 0.25 MPa for the model without the adhesive. The potential role of denture adhesives in leading to a better fit between the RPD and oral mucosa as well as lowering contact pressures could be used to improve comfort in patients wearing RPDs.

scholarly journals Stress and strain analyses of removable partial denture abutment tooth in relation to the position of the minor connector

2017 ◽  
Vol 145 (9-10) ◽  
pp. 452-456
Author(s):  
Aleksandra Milic-Lemic ◽  
Jelena Eric ◽  
Katarina Radovic ◽  
Saso Elencevski ◽  
Rade Zivkovic ◽  
...  
Keyword(s):  
Finite Element ◽  
Obtuse Angle ◽  
The Finite Element Method ◽  
Removable Partial Denture ◽  
Element Analysis ◽  
Partial Denture ◽  
Optimum Angle ◽  
Biomechanical Behavior ◽  
Study Results ◽  
Abutment Teeth

Introduction/Objective For optimum loading distribution, the angle formed by the occlusal rest and the vertical minor connector from which it originates should be less than 90?. The objective of the article was to visualize the optimum angle between the occlusal rest and the minor connector in terms of intensity and distribution of occlusal loads using finite element analysis. It was the intention, concerning biomechanical behavior, to document that the optimum angle between the occlusal rest and the minor connector should be less than 90?. Methods Three different virtual models of partial edentulous Kennedy III class were created using the CATIA design computer program with different angles between the occlusal rest and the minor connector. Stress distribution after simulated occlusal loading was analyzed using the finite element method. Results Comparing the results obtained for three models, the highest stress values were seen in model 3 (the angle between the occlusal rest and the small connector is greater than 90?) whether the load is applied in the middle or at the end of the saddle. Conclusion Within limitations and on the basis of the study results, the minimum compressive stress was seen in model 1, where the angle between the occlusal rest and the minor connector was less than 90? whether the load is applied in the middle or at the end of the saddle. It is recommended that obtuse angle between the rest and the minor connector should be avoided due to potential hazardous stress concentration on abutment teeth.

scholarly journals Kombinasi hybrid prosthesis dengan precision attachment pada kasus mahkota klinis pendek Hybrid prosthesis combined with precision attachment to overcome clinically short crown

2013 ◽  
Vol 12 (2) ◽  
pp. 118
Author(s):  
Irene Melina ◽  
Soekobagiono Soekobagiono ◽  
Harry Laksono
Keyword(s):  
Clinical Success ◽  
Crown Height ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Hybrid Prosthesis ◽  
Abutment Teeth ◽  
Metal Frame

In the case of losing many teeth and the residual teeth have short clinical crown, design of the denture may hybriddenture. Hybrid denture is a removable partial denture with metal frame which have retention in the form ofprecision attachment. In short clinical crown, placement of crowns and the use of traction can be a problem,because there is no or lack of retention. In the manufacture of hybrid denture with precision attachment retention,using abutment with short clinical crowns is contraindicated. But in some literatures mentioned that the rest of theclinical crown height of not less than 2 mm can still be used as an abutment, but the abutments must be modified,such as making a longer preparation towards cervical edge. In several studies and literature, it is mentioned that toimprove the retention of the crown, the axial wall of abutment must be 4-6°. This article is aimed to report the clinical success of using the hybrid denture on abutment teeth which have short clinical crowns in a patient woman

scholarly journals Evaluation of the behavior system locator associated with a removable partial denture, finite element analysis

2018 ◽  
Vol 25 (2) ◽  
pp. 10
Author(s):  
Medardo Alexander Arenas-Chavarria ◽  
Samuel David Giraldo-Gómez ◽  
Federico Latorre-Correa ◽  
Junes Abdul Villarraga-Ossa
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Permanent Deformation ◽  
Vertical Direction ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Element Analysis ◽  
Partial Denture ◽  
Solid Works ◽  
Von Mises

Aim: The purpose of this research was to evaluate the behavior of the system locator settings associated with distal extension removable partial denture lower (PPR) by finite element analysis (FEA). Materials and Methods: A Class II Kennedy 3D model using a CAD software Solid Works 2010 (SolidWorks Corp., Concord, MA, USA), and subsequently processed and analyzed by ANSYS Software version Model 14. One (1) was designed implant Tapered Screw -Vent® (ref TSVB10 Zimmer Dental-Carlsbad,CA,USA.) length x 10mm diameter 3.7mm with a 3.5mm platform, internal hexagon with its respective screw fixation; this was located at the tooth 37 as a rear pillar of a PPR, whose major connector was a lingual bar casting (alloy cobalt chromium), based combined (metal/ acrylic) with teeth to replace (37, 36 and 35). Efforts were evaluated von Mises in a 400N load. This analysis allowed assessing the performance of various prosthetic structures modeled and generated effects on bone-implant interface. Results: Differences between the values von Mises in all structures and loads were observed before there was no permanent deformation in any of them. Structures such as bone showed in normal values microstrain. Conclusions: The behavior of the PPRimplant connection, showed a favorable distribution efforts by using a PPR, subjecting it to load in the vertical direction.

scholarly journals Clinical Evaluation of the Effect of Implant-Supported and Implant Retained Distal Extension Removable Partial Dentures on the Supporting Structures

2021 ◽  
Vol 9 (D) ◽  
pp. 170-178
Author(s):  
Ragia Saad Mohamed Kotb ◽  
Ahmed Gamal Ahmed Hassan ◽  
Emad Mohamed Tolba M. Agamy ◽  
Gehan Fekry Mohamed
Keyword(s):  
Class I ◽  
Gingival Index ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Second Molar ◽  
Group I ◽  
Probing Depth ◽  
Significant Difference ◽  
Abutment Teeth ◽  
Supporting Structures

Objective: To evaluate and compare the effect of implant supported versus implant retained removable partial denture restoring Kennedy's class I cases on the supporting structures by measuring modified gingival index and probing depth for abutment teeth and implants. Subjects and Methods: Twelve patients; who had Kennedy class I mandibular partially edentulous ridge extending distal to the first or second premolar,   were selected from the outpatient clinic, Prosthodontics Department, Faculty of Dentistry, Minia University. The patients were classified into two equal groups; according to the implant superstructures either dome shaped abutment or ball and socket attachment.  Each Patient of both groups had two implants in second molar position (one in each side) and received removable partial denture of the same design. Patients were followed up for one year clinically. Group I: Six patients received RPD supported by dome shaped short abutments.  Group II six patients received RPD retained by ball and socket attachments. Results: Results revealed that, there was no statistically significant difference between the two groups regarding modified gingival index and probing depth around the abutment teeth and implant abutment. Conclusion:  The use of dome shaped abutment or ball and O-ring attachment have the same effect on gingival index and probing depth around natural abutments and implants in Kennedy class I mandibular situations.

scholarly journals Maxillary removable partial denture combined with O’ring attachment implant: a case report

2018 ◽  
Author(s):  
Tiago Rebelo Costa ◽  
Cláudio Akira Yamaguchi ◽  
Alessandra Pucci Mantelli Galhardo ◽  
Roberto Chaib Stegun ◽  
Bruno Costa ◽  
...  
Keyword(s):  
Case Report ◽  
Oral Rehabilitation ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Aesthetic Result ◽  
First Choice ◽  
Abutment Teeth ◽  
Fixed Prosthesis ◽  
The Aesthetic ◽  
Systemic Health

Oral rehabilitation with free-end removable partial denture (RPD) is one of the major challenges in prosthodontic dentistry. The absence of a distal abutment produces undesirable RPD movement during masticatory function due to the high resilience of the residual ridge, which limits the denture efficiency and may damage the abutment teeth and bone over time. The advent of dental implants made possible to substitute the missing teeth with fixed implant-supported dentures as the first choice treatment to overcome such inconveniences. However, this indication may not be suitable for all patients due to financial, anatomical or systemic health conditions. Nevertheless it is possible to improve free extension RPD by using implants in the posterior edentulous ridge to achieve biological, biomechanical, physiological and social benefits. This article aims to present a case report on oral rehabilitation in which a RPD was made combined with an implant for posterior support in a sizeable edentulous ridge. The patient appreciated the retention improvement and the aesthetic result. The combination of a RPD with a posterior implant is an alternative treatment for cases in which implant-supported fixed prosthesis is not indicated, reducing the displacement and minimizing the limitations of the free-end devices.

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