scholarly journals Attachment-Retained Unilateral Partial Denture versus Tooth Implant-Supported Prosthesis in Mandibular Distal Extension Cases: A Randomized Controlled Trial

2021 ◽  
Vol 15 (1) ◽  
pp. 626-635
Author(s):  
Mohamed Sharaf ◽  
Asharaf Eskander
Keyword(s):  
Bone Loss ◽  
Force Measurement ◽  
Controlled Trial ◽  
Conventional Group ◽  
Radiographic Evaluation ◽  
Partial Denture ◽  
Included Patient ◽  
Significant Difference ◽  
Abutment Teeth ◽  
Distal Extension

Objective: To evaluate patients’ satisfaction, biting force measurement, and radiographic evaluation of abutment teeth of tooth implant-supported fixed partial denture, unilateral attachment, and conventional partial denture in mandibular distal extension cases. Materials and Methods: Twenty-four participants were selected according to the following criteria: participants with unilateral mandibular distal extension with last standing second premolar abutment; participants having abutments with sufficient occluso-gingival height and good periodontal condition. Participants were divided into the following three equal groups: participants of the implant group received fixed tooth implant-supported fixed partial dentures, attachment group participants received unilateral attachment removable partial dentures, and conventional group participants received conventional removable partial dentures. The evaluation included patient satisfaction using “OHIP14” questionnaires, biting force measurement, and radiographic evaluation of terminal abutments using the ANOVA test. Results: Participants of the implant group were mainly satisfied with their prosthesis than the attachment group, which is higher than the conventional. Regarding biting force measurement, there is a statistically significant difference (p < 0.05) between all groups, including the implant group and attachment group, as well as between attachment and conventional group (p < 0.05). The conventional group showed statistically significant (p < 0.05) highest mean bone loss, while there was no statistically significant difference between implant and attachment groups; both showed statistically significantly lower mean amounts of bone loss. Conclusion: The tooth implant-supported fixed prosthesis could be considered a superior line of treatment for managing distal extension cases. Unilateral attachment, which is considered an excellent alternative in the case of implant placement, is not recommended.

scholarly journals RPI and RPL clasp masticatory load distribution in lower free end denture case with photoelastic methods

2007 ◽  
Vol 19 (1) ◽  
Author(s):  
Dahlia Sutanto ◽  
Muslich Mahmud ◽  
Poedji Rahajoeningsih
Keyword(s):  
Load Distribution ◽  
Denture Base ◽  
Partial Denture ◽  
Significant Difference ◽  
Direction Of Movement ◽  
Abutment Teeth ◽  
Functional Movements ◽  
Distal Extension ◽  
Supporting Structures ◽  
Occlusal Load

The extent and direction of movement of removable partial dentures during function are influenced by the nature of supporting structures and the design of the prosthesis since forces are transmitted to abutment teeth by rest, guide planes, and direct retainers during functional movements. Because of the lack of tooth support distally, the denture base will have tissueward underfunction proportionate to the quality (displaceability) of the supporting soft tissue, the accuracy of the denture base, and the total occlusal load applied. The movement of the base under function determines the occlusal efficiency of the partial denture and the degree to which the abutment teeth are subjected to torque and tipping stresses.The purpose of this study is to know the functional load exerts with RPI and RPL direct retainer in bilateral distal extension. This study is a laboratory experiment employing samples of 5 frames using RPI and 5 frames using RPL direct retainer design. Testing was conducted by Vishay Teaching Polariscope type 080. The result was noted and analyzed statistically using ANOVA.The result of this study indicates that F calculation value for frame with RPI and RPL direct retainer design is 5,35 and 6,11 Mpa; F calculation for the occlusal load distribution on first premolar and edentulous area is 276,90 Mpa and 171,53 Mpa; F calculation for occlusal load distribution on first premolar and edentulous area employing RPI and RPL direct retainer design is 9,17 and 11,96 Mpa. This statistical calculation shows that there is a significant difference between RPI and RPL direct retainer design, the occlusal load concentrated at edentulous area either RPI or RPL direct retainer, and the occlusal load distribution between the first premolar and edentulous area are more uniform on RPI direct retainer design.

scholarly journals Influence of rigidity of retainers on dynamic behavior of implant-supported removable partial dentures

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Toshifumi Nogawa ◽  
Masayasu Saito ◽  
Naomichi Murashima ◽  
Yoshiyuki Takayama ◽  
Atsuro Yokoyama
Keyword(s):  
Dynamic Behavior ◽  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Denture Base ◽  
Second Molar ◽  
Mechanical Simulation ◽  
Computed Tomography Images ◽  
Significant Difference ◽  
Abutment Teeth ◽  
Distal Extension

Abstract Background Implant-supported removable partial dentures (ISRPDs) are an effective treatment for partially edentulous patients. ISRPDs improve patients’ satisfaction and oral function to a greater extent than RPDs by improving denture stability and enhancing support. However, the effect of a type of direct retainer on displacement of the abutment teeth and dentures in ISRPDs remains unclear. Therefore, we made a resin mandibular model of unilateral mandibular distal-extension partial edentulism for mechanical simulation and compared the dynamic behavior of the abutment teeth and the denture base among different tooth-borne retainers with various rigidities for RPDs and ISRPDs. Methods A resin mandibular model for mechanical simulation that had unilateral mandibular distal-extension edentulism and was missing the first molar, second molar, first premolar, and second premolar, and a denture fabricated from the patient’s computed tomography images were used. Three types of direct retainers with different connecting rigidities were evaluated. The vertical displacement of the denture base and buccal and lingual sides and the mesial displacement of the abutment teeth were measured. Results Regardless of the rigidity of the direct retainers and loading positions, the displacement of the denture bases in the ISRPDs was significantly smaller than that in the RPDs (P < 0.001). There was no significant difference in vertical displacement of the denture bases among direct retainers with various connecting rigidities in the ISRPDs. Conversely, horizontal displacement of the abutment teeth in both the RPDs and ISRPDs tended to be larger with the cone crown telescope, which has high rigidity, than with the cast cingulum rest and wire clasp, which have much lower rigidities. Conclusion Our results suggested that cast cingulum rest and wire clasps as direct retainers are appropriate ISRPDs to minimize denture movement and suppress displacement of the remaining teeth in patients with unilateral mandibular distal-extension partial edentulism.

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 Evaluation of Biting Force of New Design of Extracoronal Castable Precision Attachment versus Conventional Partial Denture for Treatment of Unilateral Mandibular Distal Extension Area: A Randomized Controlled Trial

2020 ◽  
Vol 8 (D) ◽  
pp. 23-28
Author(s):  
Mohamed Afify ◽  
M. Helmy ◽  
N. Abbas
Keyword(s):  
Controlled Trial ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Masticatory Efficiency ◽  
Group I ◽  
Group Ii ◽  
Treatment Summary ◽  
Post Hoc ◽  
Distal Extension

PURPOSE: The aim of this study was to evaluate biting force of patients with unilateral mandibular distal extension area treated with two different designs of the removable partial denture (RPD), conventional RPD, and new design of extracoronal castable precision attachment (OT Unilateral attachment). MATERIALS AND METHODS: This study was conducted on 16 patients with unilateral mandibular distal extension area with the second premolar is the last abutment teeth. The patients were divided into two equal groups, Group I received conventional RPD, which provides cross arch stabilization and a double Aker clasp was fabricated. Group II received new design of extracoronal castable precision attachment (OT Unilateral attachment). Evaluation of biting force by loadstar sensor, patients of both groups were evaluated at the time of prosthesis insertion, 3, 6, and 1 year later. Statistical analysis performing one-way analysis of variance followed by Tukey’s post hoc test to compare between all follow-up periods within each group, comparison between two groups regarding each follow-up period was performed by independent t-test. RESULTS: Both treatments yielded better after-treatment summary when compared with the baseline; however, better results were obtained and showed a statistically significant increase in Group II (OT unilateral design), especially after 3, 6 months, and 1 year later. CONCLUSION: From the results of this study, it was concluded that: It is preferable to use the new design of extracoronal castable precision attachment (OT unilateral) being simpler, more comfortable to the patients and give high masticatory efficiency in the form of biting force than conventional RPD.  

scholarly journals Management of Kennedy Class I Partial Edentulism by Removable Cast Partial Denture: A Case Report

2013 ◽  
Vol 3 (2) ◽  
pp. 60
Author(s):  
NB Jamayet ◽  
U Habiba ◽  
SZE Zai ◽  
S Hossain
Keyword(s):  
Class I ◽  
Proper Function ◽  
Edentulous Patient ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Crown Root ◽  
Metal Framework ◽  
Abutment Teeth ◽  
Distal Extension ◽  
Lower Arch

Background: Distal extension edentulism can affect the patient’s ability to function as a dentate person. A well-made removable partial denture that has appropriate extensions, borders and ridge-to-dentition relationship will benefit the partially edentulous patient by providing increased comfort and improved dental function. This article described a patient who had a bilateral distal extension removable partial denture in both upper and lower arch. The prosthesis showed a successful rehabilitation with proper function and aesthetics. Methods: A Kennedy class I bilateral free end saddle edentulous arch in both upper and lower arch was rehabilitated with removable cast partial denture. The case had the reasonable amount of crown: root ratio for the remaining abutment teeth for placement of metal framework, occlusal rest and cast clasp. Results: The delivered denture showed proper sitting of occlusal rest and cast clasp. Retention and stability was acceptable. Occlusion had achieved its desired occlusion scheme. Conclusion: Removable cast partial denture is a suitable option for the rehabilitation of partially edentulous case if the case has such amount of abutment teeth remaining with healthy periodontal condition. DOI: http://dx.doi.org/10.3329/bjdre.v3i2.16616 Bangladesh Journal of Dental Research & Education Vol.3(2) 2013: 60

The effect of the resilient-layer distal-extension partial denture on movement of the abutment teeth: A new methodology

1988 ◽  
Vol 60 (5) ◽  
pp. 622-630 ◽  
Author(s):  
Hussein G. ElCharkawi ◽  
Richard J. Goodkind ◽  
Ralph DeLong ◽  
William H. Douglas
Keyword(s):  
Partial Denture ◽  
Abutment Teeth ◽  
Distal Extension

scholarly journals A Comparative Study of Impression Procedures for Distal Extension Removable Partial Dentures

2011 ◽  
Vol 12 (5) ◽  
pp. 333-338
Author(s):  
Pradeep N Tavane ◽  
Sathish Abraham ◽  
Anand U Madihalli ◽  
Naveen S Yadav ◽  
P Manoranjan Reddy ◽  
...  
Keyword(s):  
Comparative Study ◽  
Acrylic Resin ◽  
Middle Region ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Placement Method ◽  
Mucosal Tissues ◽  
Occlusal Surfaces ◽  
Significant Difference ◽  
Distal Extension

ABSTRACT Aim This study was carried out with the purpose of comparing three impression methods as to which of them placed tissues most favorably. Methods The methods used were Hindels method, selective tissue placement method and functional reline method. The measurements obtained were analyzed to determine which of the three impression methods placed the mucosal tissues maximally. To compare and measure tissue placements, autopolymerizing acrylic resin platforms were constructed to the height of the occlusal surfaces of the remaining teeth. 15 orthodontic buccal tubes were placed on each side of the platform. They were arranged in three sets of five and attached to the platform over selected reference regions by means of autopolymerizing resin. The selected reference areas were in anterior, middle and posterior areas of the ridge on either side. Results No significant difference was seen in tissue placement in the anterior middle and posterior regions in each of the three methods when each method was assessed separately. Selective tissue placement method placed the tissues maximally (7.547 mm) followed by Hindels method (7.2110 mm) and the least placement was by functional reline method (5.856 mm). Tissue placement was significantly higher in Hindels method as compared to functional reline method (p < 0.001). Conclusion Tissue placement was maximum in the posterior region, followed by the middle region and least in the anterior region of the mandibular ridge for all three methods. Selective tissue placement method showed the maximum overall tissue placement followed by the Hindels method and minimum placement was by functional reline method. Clinical significance Selective tissue placement method provided maximum overall tissue placement and can be a preferred technique for impression making for bilateral distal extension removable partial denture fabrication. How to cite this article Madihalli AU, Tavane PN, Yadav NS, Abraham S, Reddy PM, Baiju G. A Comparative Study of Impression Procedures for Distal Extension Removable Partial Dentures. J Contemp Dent Pract 2011;12(5):333-338.

scholarly journals Pulpal blood flow changes in abutment teeth of removable partial dentures

2009 ◽  
Vol 9 (4) ◽  
pp. 296-300 ◽  
Author(s):  
Göknil Ergün Kunt ◽  
Deniz Kökçü ◽  
Gözlem Ceylan ◽  
Nergiz Yılmaz ◽  
Ahmet Umut Güler
Keyword(s):  
Blood Flow ◽  
Removable Partial Denture ◽  
Partial Denture ◽  
Mean Values ◽  
Pulpal Blood Flow ◽  
Significant Difference ◽  
Negative Effect ◽  
Abutment Teeth ◽  
The Mean ◽  
Systemic Problems

The purpose of this study was to investigate the effect of tooth supported (TSD) and toothtissue supported (TTSD) removable partial denture wearing on pulpal blood flow (PBF) of the abutment teeth by using Laser Doppler Flowmeter (LDF).Measurements were carried out on 60 teeth of 28 patients (28 teeth and 12 patients of TTSD group, 32 teeth and 16 patients of TSD group) who had not worn any type of removable partial dentures before, had no systemic problems and were non smokers. PBF values were recorded by LDF before insertion (day 0) and after insertion of dentures at day 1, day 7 and day 30. Statistical analysis was performed by student t test and covariance analyses of repeated measurements.In the group TTSD, the mean values of PBF decreased statistically significantly at day 1 after insertion when compared with PBF values before insertion (p<0,01). There was no statistically significant difference among PBF mean values on 1st, 7th and 30th day. However, in the group TSD, there was no statistically significant difference among PBF mean values before insertion and on 1st, 7th and 30th day. In other words, PBF mean values in group TSD continued without changing statistically significant on 1st, 7th and 30th day.TTSD wearing may show negative effect on the abutment teeth due to decreasing basal PBF.

Effect of Direct Relining on Stresses at the Denture Base and the Metal Frame of Removable Partial Dentures

2005 ◽  
Vol 6 (1) ◽  
pp. 37-47 ◽  
Author(s):  
N.A. Al-Ghannam ◽  
F.M. Fahmi
Keyword(s):  
Soft Tissues ◽  
Class Iii ◽  
Removable Partial Denture ◽  
Denture Base ◽  
Partial Denture ◽  
Significant Difference ◽  
Metal Frame ◽  
Males And Females ◽  
Distal Extension ◽  
Harmful Effects

Abstract The Kennedy Class I removable partial denture (RPD) can cause stress to supporting hard and soft tissues and may lead to harmful effects. The purpose of this study is to investigate the pattern of these stresses in three different positions before and following a relining procedure. Ten patients, five males and five females, with a lower distal extension RPD and an opposing upper class III type RPD were selected for this study. Strain gauges together with a strain gauge indicator were used to study the pattern of stresses in three selected positions. Some changes were significantly different at the site of the denture base and at the metal frame near the direct retainer. After relining, the stresses were shared partially by the abutments and partially by the tissues. Maximum stresses were reported during swallowing. No significant difference was noticed between males and females. Citation Al-Ghannam NA, Fahmi FM. Effect of Direct Relining on Stresses at the Denture Base and the Metal Frame of Removable Partial Dentures. J Contemp Dent Pract 2005 February;(6)1:037-047.

Sign in / Sign up

Export Citation Format

Share Document