الفهرس 
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Abstract
This study was carried out to evaluate and compare the effect of soft acrylic resin lined obturators versus sectional obturators on the abutment teeth by measuring periodontal pocket depth, crevicular fluid flow, bone height changes around the abutment teeth.
Twelve patients exhibiting large lateral palatal defects shared in this study. The selected patients were divided into two equal groups, group І patients were rehabilitated with definitive hollow obturators lined with soft acrylic resin. While, group II patients were rehabilitated with sectional obturator prostheses, where the two sections were assembled together by ball and socket attachment.
For all patients, partial denture metal frameworks were constructed following the same basic principles. The hollow obturator portion for both groups was constructed using heat-cured acrylic resin.
Change in bone height around the abutment teeth, periodontal pocket depth, and creviclar fluid flow were measured to assess and compare the effect of the two appliances.
The data was collected at time of denture insertion, three and six months after insertion.
The results of this study revealed significant bone loss of all abutments bearing sectional prostheses compared to soft resin lined prostheses.
Statistical non significant increase in the crevicular fluid flow was evident with all abutments supporting both the soft resin lined and sectional obturators.
Sectional obturator caused more significant changes in pocket depth compared to soft resin lined obturators especially at the premolar area