Pulpal blood flow changes in abutment teeth of removable partial dentures

Göknil Ergün Kunt,Gözlem Ceylan,Deniz Kökçü ,Nergiz Yılmaz ,Ahmet Umut Güler

doi:10.17305/bjbms.2009.2782

Göknil Ergün Kunt, Gözlem Ceylan + Show 3 more

Open Access

https://doi.org/10.17305/bjbms.2009.2782

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Abstract

The purpose of this study was to investigate the effect of tooth supported (TSD) and tooth-tissue 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.

Highlights

There are two basic types of partial dentures for partially edentulous arch; a) tooth supported removable partial dentures (TSD) and b) tooth tissue supported removable partial dentures (TTSD)
The rotation can cause torquing forces to act on the clasped abutment teeth
It was seen that the statistical significant difference between pulpal blood flow (PBF) mean values of the two groups began at day and reached to maximum at day and continued at about this level until day (Table, Figure )

Summary

Introduction

There are two basic types of partial dentures for partially edentulous arch; a) tooth supported removable partial dentures (TSD) and b) tooth tissue supported removable partial dentures (TTSD). Cast circumferential clasps are ideally suited for TSD because of the potential for excellent retention and reciprocation. Circumferential clasps are not usually indicated for TTSD because the retentive tip lies forward of the axis of rotation and has the potential for applying torquing forces to the abutment. In TTSD functional forces applied to the denture base causes its movement towards the tissue. This movement is the result of a rotation movement of the RPD bases around an axis connecting the most distal abutment teeth ( - ). The rotation can cause torquing forces to act on the clasped abutment teeth. The major attributes of infrabulge retainers are their potential for disengaging during functional movements of TTSD

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