الفهرس 
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Abstract
Abstract
Purpose: To evaluate short and long span polyether-ether-ketone removable partial denture
(PEEK RPD) fabricated by computer-aided design/computer-aided manufacturing
(CAD/CAM) technique.
Materials and Methods: Twenty maxillary (class II Kennedy) partially edentulous patients
opposing almost natural dentition were selected and divided according to length of the
edentulous span into two groups (A, B), ten patients each. group A, patients with canine as
the last abutment tooth. group B, patients with second premolar as the last abutment tooth.
All patients received maxillary PEEK RPD fabricated by CAD/CAM milling technique and
evaluated experimentally (dimensional deviation), clinically (denture base deformation,
plaque index, gingival index and periodontal pocket depth) and radiographically (bone loss
at abutment tooth and edentulous ridge) at time of denture insertion, 6, 12 and 18 follow up
periods.
Results: In this study, PEEK RPD undergone dimensional deviation with a significant
difference at each follow up period in case of short and long saddle cases, but with no
significant difference between both groups. The strain recorded during clenching was more
than during chewing for short and long saddle cases with a highly significant difference and
with higher value for the long saddle cases than short saddle cases with a significant
difference during clenching but with no significant difference during chewing. Still the
clinical parameter scores were within the acceptable limits as confirmed by results of plaque
index, gingival index, periodontal pocket depth, marginal bone loss around abutment tooth
and residual alveolar ridge of both groups, there were no significant differences between
both groups.
Conclusion: Modified PEEK based material can be considered a useful alternative
framework material for RPDs restoring Maxillary Kennedy Class II edentulous patients.
Wearing of digitally designed PEEK RPD which fabricated by milling technique created a
favourable oral environment with the marginal bone loss around abutment tooth and residual
alveolar ridge were within the clinically acceptable limit. PEEK RPDs undergo stresses and
dimensional deviation at each follow up period in case of short and long saddle maxillary
Kennedy class II cases but with a clinically acceptable limits as confirmed by results of this
study.
Keywords: Maxillary kennedy class II, Polyether-ether-ketone, CAD/CAM technique,
Digital dimensional deviation, Strain Gauge.