International Journal of Prosthodontics and Restorative Dentistry

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2012 | April-June | Volume 2 | Issue 2

EDITORIAL

Editorial

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:1] [Pages No:0 - 0]

PDF  |  DOI: 10.5005/ijoprd-2-2-v  |  Open Access |  How to cite  | 

RESEARCH ARTICLE

Satyabodh S Guttal, Sagar Abhichandani

Effect of Insertion and Removal of Tooth Supported Overdentures on Retention Strength and Fatigue Resistance of Two Commercially Available Attachment Systems

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:5] [Pages No:47 - 51]

PDF  |  DOI: 10.5005/jp-journals-10019-1047  |  Open Access |  How to cite  | 

Abstract

Purpose

The main problem with semiprecision attachment retained prosthesis is that they need frequent servicing in terms of replacing the female component. There is a need for a study to assess the life span and frequency of replacement of elastic components in the attachment systems.

Aim

The aim of the study was to test the retention strength and fatigue resistance of Rhein OT cap and Ceka sagix attachment systems fabricated on the models.

Materials and methods

Rhein OT cap (micro) and Ceka sagix attachments were procured. Acrylic resin mandibular models fabricated with teeth embedded at overdenture positions. Bar framework with attachments were cast and cemented on the model. Denture fabricated on this model was subjected to universal testing machine (UTM Instron 5900 series) for retention and fatigue test. The retention strength was measured at various cycles namely 1,440, 2,880, 4,320 and 5,760 cycles to check for the loss of retention and development of fatigue on the basis of average number of removals and placements per day for 1,2,3 and 4 years, respectively. The values of both the attachment systems were recorded at the respective cycles and a graphical analysis was carried out representing the retention loss and development of fatigue.

Results

One-way ANOVA was used as part of the statistical analysis to compare the retention strength and fatigue resistance of both the attachment systems used. The results obtained proved that the retention values of both the attachment systems on tooth supported overdentures had a significant variation as they were subjected to increased number of cycles.

Conclusion

Sagix and Rhein attachment systems showed adequate retention values up to the first 2 to 3 years (2,880- 4,320 cycles). Fatigue test simulating 4 years of denture insertion and removal did cause subsequent reduction in the retention values but no component fracture of attachment systems.

How to cite this article

Guttal SS, Nadiger RK, Abhichandani S. Effect of Insertion and Removal of Tooth Supported Overdentures on Retention Strength and Fatigue Resistance of Two Commercially Available Attachment Systems. Int J Prosthodont Restor Dent 2012;2(2):47-51.

RESEARCH ARTICLE

Farhan Raza Khan, Muhammad Hasan, Syed Iqbal Azam

The Effect of Different Shades, Voltages and Increment Thickness on the Polymerization Depth of a Microhybrid Composite

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:5] [Pages No:52 - 56]

PDF  |  DOI: 10.5005/jp-journals-10019-1048  |  Open Access |  How to cite  | 

Abstract

Aim

Electric fluctuations in the developing world are common and may affect dental composite curing. We determined the effect of variable voltage and increasing thickness of different shades of composite on its depth-of-cure.

Materials and methods

ISO scrapping method was used on 14 commonly used shades of Esthet-X HD composites. Student's t-test and ANOVA were applied to compare the mean depth-of-cure and a linear regression model was developed using variables voltage (180 V and 220 V), material thickness (2, 4 and 6 mm) and shades (n = 14).

Results

The mean curing depth of samples was significantly reduced at 180 volts compared to 220 volts (p-value <0.002). At thickness of 2 mm, all samples were fully cured but when it was raised to 4 mm, the depth-of-cure reduced to 1.86 mm ± 0.06; while at 6 mm thickness, it reached to 1.96 mm ± 0.06 (p-value < 0.001).

Conclusion

Around 82% variation in the depth-of-cure is explained by voltage, thickness and shade of composite material (p-value <0.001).

Clinical significance

Electric fluctuations are prevalent in the developing world and thus poor voltage flow is responsible for dental composite's inadequate polymerization.

How to cite this article

Khan FR, Hasan M, Azam SI. The Effect of Different Shades, Voltages and Increment Thickness on the Polymerization Depth of a Microhybrid Composite. Int J Prosthodont Restor Dent 2012;2(2):52-56.

RESEARCH ARTICLE

Imran Farooq, Umair Hassan, Sarosh Mahdi, Rizwan Ullah, Hajra Rana

Newer Glass Ionomer Cements having Strontium Ions and the Effect of their Release on Acidic Medium

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:4] [Pages No:57 - 60]

PDF  |  DOI: 10.5005/jp-journals-10019-1049  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Hassan U, Farooq I, Mahdi S, Ullah R, Rana H. Newer Glass Ionomer Cements having Strontium Ions and the Effect of their Release on Acidic Medium. Int J Prosthodont Restor Dent 2012;2(2):57-60.

CASE REPORT

Anil Chandra, Ramesh Bharti, Aseem Prakash Tikku, Deeksha Arya

Palatogingival Groove: A Cause for Periapical Infection

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:5] [Pages No:61 - 65]

PDF  |  DOI: 10.5005/jp-journals-10019-1050  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Bharti R, Chandra A, Tikku AP, Arya D. Palatogingival Groove: A Cause for Periapical Infection. Int J Prosthodont Restor Dent 2012;2(2):61-65.

CASE REPORT

Akinori Tasaka, Takayuki Ueda, Kaoru Sakurai

Infraocclusion Treated with Removable Prosthesis on Occlusal Surface of Severely Attritioned Teeth

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:6] [Pages No:66 - 71]

PDF  |  DOI: 10.5005/jp-journals-10019-1051  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Tasaka A, Ueda T, Sakurai K. Infraocclusion Treated with Removable Prosthesis on Occlusal Surface of Severely Attritioned Teeth. Int J Prosthodont Restor Dent 2012;2(2):66-71.

CASE REPORT

Bipin Yeshwantrao Muley, Arun N Khalikar, Sameera Rafique Shaikh, Mohana M Tagore, Sattyam V Wankhade

Full Mouth Rehabilitation of a Patient with Severely Worn Dentition and Reduced Occlusal Vertical Dimension: A Clinical Report

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:5] [Pages No:72 - 76]

PDF  |  DOI: 10.5005/jp-journals-10019-1052  |  Open Access |  How to cite  | 

Abstract

How to cite this article

Muley BY, Khalikar AN, Shaikh SR, Tagore MM, Patil PG, Wankhade SV. Full Mouth Rehabilitation of a Patient with Severely Worn Dentition and Reduced Occlusal Vertical Dimension: A Clinical Report. Int J Prosthodont Restor Dent 2012;2(2):72-76.

REVIEW ARTICLE

Raina D'Souza, Omkar Shetty, Padmapriya Puppala, Nitin Shetty

A Better Bond: Luting Simplified

[Year:2012] [Month:April-June] [Volume:2] [Number:2] [Pages:5] [Pages No:77 - 81]

PDF  |  DOI: 10.5005/jp-journals-10019-1053  |  Open Access |  How to cite  | 

Abstract

How to cite this article

D'Souza R, Shetty O, Puppala P, Shetty N. A Better Bond: Luting Simplified. Int J Prosthodont Restor Dent 2012;2(2):77-81.

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