scholarly journals Comparison between Acetal Resin and Cobalt-chromium Removable Partial Denture Clasps: Effect on Abutment Teeth Supporting Structures

2011 ◽  
Vol 1 (3) ◽  
pp. 147-154 ◽  
Author(s):  
Tarek Mohamed ◽  
Osama Abdulmoneam Baraka ◽  
Magdy Mostafa Badawy
Keyword(s):  
Bone Density ◽  
T Test ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Attachment Loss ◽  
Abutment Teeth ◽  
Crevicular Fluid ◽  
Bone Height ◽  
Supporting Structures

ABSTRACT Statement of problem Acetal resin has been introduced as an esthetic partial denture clasp material. However, the effects of these clasps on the abutment teeth supporting structures were not clear. Purpose To evaluate the effects of acetal resin clasps on the abutment teeth supporting structures as compared to cobalt-chromium clasps. Materials and methods Twenty patients, 12 males and 8 females, with Kennedy class III modification I partially edentulous maxilla and dentulous mandibles were selected for this study. Patients were divided into two equal groups; group 1 received maxillary cobalt-chromium partial denture frameworks with acetal resin Akers clasps. Group 2 received maxillary partial denture with cobalt-chromium frameworks and Akers cobalt-chromium clasps. Crevicular fluid, epithelial attachment loss, and bone height and density of the abutment teeth were evaluated at partial denture insertion and after 6 and 12 months. Paired t-test was used at p ≤ 0.05 to assess the changes in the above parameters in each group. Student t-test was used to compare between the two groups. Results Crevicular fluid measurements were significantly higher in the first group than that in the second group. There were no differences in epithelial attachment loss between the two groups. There were significantly higher reductions in the bone height and in the bone density in the second group than that in the first group. Conclusion Acetal resin clasps were superior to cobalt-chromium clasps as produced fewer reductions in bone height and in bone density around the abutment teeth inspite of produced increase in the crevicular fluid. Clinical implications Since there were lesser reductions in bone height and in bone density around acetal resin clasp abutments, it could be used successfully to retain partial dentures. However, meticulous oral hygiene and proper insertion and removal of partial denture with acetal resin clasps were required to decrease gingival inflammation and crevicular fluid amount.

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 Different Materials Used as Denture Retainers and Their Colour Stability

2018 ◽  
Vol 6 (11) ◽  
pp. 2173-2179
Author(s):  
Sherif A. Sadek ◽  
Wessam M. Dehis ◽  
Hala Hassan
Keyword(s):  
Digital Camera ◽  
Acrylic Resin ◽  
Point Of View ◽  
Colour Stability ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Abutment Teeth ◽  
Materials Used ◽  
The Aesthetic

BACKGROUND: Retainers are of great importance for the longevity of the prosthetic removable partial denture during various functions especially the esthetic one. The key of successful clasp selection is to select a direct retainer that will control tipping and torquing forces on the abutment teeth, provide retention against reasonable dislodging forces and are compatible with both tooth and tissue contour together with the aesthetic desire of the patient. AIM: This study aims to compare different clasp material to enhance the choice of the clasp based on the aesthetic point of view. METHODS: The colour evaluation of the tested materials had been evaluated by computer aided technique with digital camera with 3 Mega Pixels of resolution. RESULTS: In the current research, the technique of colour evaluation was carried out to compare different clasp materials to enhance the choice of the clasp based on the aesthetic point of view. Most commonly, Removable Partial Denture (RPD) retainers are fabricated identically from the metal framework’s alloy as Cobalt Chromium (CoCr) alloy although it is unaesthetic. This esthetic problem has been overcome by other methods and by utilising different materials, these included covering the retainers with tooth-coloured acrylic resin, as well as the introduction of esthetic materials as; Thermoplastic Acetal, Versacryl, and Thermopress. CONCLUSION: It has been concluded that the non-metallic Acetal resin clasp shows superior physical properties regarding colour stability.

scholarly journals Comparison in Bone Density Changes for Two Different Designs in Treatment of Mandibular Bilateral Free End Saddle with Osseointegrated Implants

2020 ◽  
Vol 8 (D) ◽  
pp. 229-234
Author(s):  
Seham Ali El-Sayed Sabra ◽  
Gehan Fekry ◽  
Emad Agamy
Keyword(s):  
Bone Density ◽  
Radiographic Evaluation ◽  
Time Intervals ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Second Molar ◽  
Osseointegrated Implants ◽  
Group I ◽  
Abutment Teeth

AIM: The aim of this study is to evaluate two different designs in mandibular bilateral free end saddle cases with the use of osseointegrated implants. The designs evaluated were OT-strategy extracoronal attachment and bar attachment. Radiographic evaluation was carried out for implants and natural abutment in terms of bone density. MATERIALS AND METHODS: This study was conducted on 10 patients with bilateral distal extension area with missing molars bilaterally; the patients were divided into two groups after implant insertion on the second molar area. Group I: Patients received extracoronal attachment distal to the last natural abutment teeth with the construction of metallic removable partial denture (RPD). Group II: Patients received bar attachment with the construction of metallic RPD. Both groups have the maxillary arch edentulous with the construction of complete maxillary dentures within our study. Radiographic evaluation for bone density was done for both groups at the time of prosthesis insertion, 3, 6, and 9 months later. A comparison between the two groups regarding each follow-up period was performed by an independent t-test. RESULTS: Although there were some differences between both designs in the 1st-time intervals, generally, there were no significant differences between the two designs all over the 3-time intervals. CONCLUSION: From the results of this study, it was concluded that: Although there were no significant differences between both designs, bar-attachment showed better results which should be confirmed with more future researches.

Retentive Forces of Removable Partial Denture Clasp Assemblies Made From Polyaryletherketone and Cobalt‐Chromium: A Comparative Study

2021 ◽  
Author(s):  
Frank I. Gentz ◽  
Daniel I. Brooks ◽  
Peter C. Liacouras ◽  
Anton Petrich ◽  
Christopher M. Hamlin ◽  
...  
Keyword(s):  
Comparative Study ◽  
Cobalt Chromium ◽  
Removable Partial Denture ◽  
Partial Denture

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 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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