Maha Maged Abo Shady, Faten Ahmed Aboutaleb And Eman Abd El-Salam Shakal,

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 Unilateral Distal Extension Partially Edentulous Patients (class II Kennedy Classification)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 The Abutment Tooth Near The Edentulous Area Was Then Evaluated Clinically Using Periodontal Pocket Depth Score (PPD) And Radiographically Using Digital Cone Beam Computed Tomography (CBCT) Radiograph To Evaluate Alveolar Bone Loss Of The Abutment Tooth At Time Of Denture Insertion, 6, 12 And 18 Follow Up Periods.

Results: In This Study, The PPD Score For Group A And B Showed No Increase From Initial Assessment To The 18 Follow Up Period With No Significantdifference (P-value> 0.05) And With No Significantdifference When Group A Was Compared With Group B At Different Follow Up Periods. The Mean Of The Abutment Alveolar Bone Loss For Each Group Was Increased From Time Of Denture Insertion To The 18 Months Follow Up Period With A Highly Significantdifference (P=0.000, P-value< 0.001) But With No Significantdifference When Comparing Group A And B At The Different Follow Up Period (P-value> 0.05). Conclusion: Wearing Of PEEK RPD, Digitally Designed And Fabricated By Milling Technique, Creates A Favourable Oral Environment With No Periodontal Tissue Damage And The Marginal Bone Loss Around Abutment Teeth Of Both Groups Were Within The Clinically Acceptable Limit.