Effect of Using (PEKK) Framework Versus (Co- Cr) Framework on The Bone of Mandibular Implant Supported Hybrid Prostheses
Condition: Alveolar Bone Loss
MeSH terms: Alveolar Bone Loss
Study type: Interventional

Summary: 
      the purposse of the study To evaluate the effect of implant supported hybrid prostheses on
      the bone of the supporting structure of edentulous mandible using Polyetherketoneketone
      (PEKK) framework versus cobalt chromium framework. fourteen female patients with lower single
      edentulous ridges are chosen with adequate dental hygiene, enough interarch space and free of
      systemic diseases and parafunctional habits. Patients who received new single dentures are
      randomly allocated into each group using computer software program and five intraforaminal
      implants were inserted parallel using surgical guide.
    

Detailed description: 
      Patient's approval:

        -  All patients will be informed in details about the nature of the investigation and the
           aim of the study. They will agree to take part in the study and will sign on an informed
           consent form.

        -  All participants will be given notice about their privacy practices, their legal duties
           and their rights.

        -  In case of implant treatment failure, the patients will receive a new well-fitting
           denture.

      Patient's grouping:

      In this study there will be two equal groups, grouping will be based on the material that
      will be used for framework construction:

      Group I: framework will be fabricated using PEKK. Group II: frame work will be fabricated
      using cobalt chromium alloy.

      Clinical steps:

      Pre-prosthetic phase:-

        -  Conventional single lower denture will be made for all patients.

        -  Occlusal adjustment of upper teeth will be done for all patients.

        -  The single lower denture will be duplicated with radiographic markers and CBCT will be
           used to determine exact position of implants.

      Surgical phase:-

        -  Five conventional implants in intraforaminal area will be placed according to the
           planned cone beam CT using surgical guide to accurately place the implants.

        -  Postoperative analgesics and anti-inflammatory medications will be described.

        -  After osseointegration, second surgery will be carried out and healing abutment will be
           screwed for each implant.

      Prosthetic phase:-

        -  After healing period open top tray impression will be made.

        -  Jaw relation record will be taken using record bases and wax rims.

        -  Group I: The PEKK framework will be milled using milling machine.

        -  Group II: cobalt chromium framework will be made with wax pattern milling then casted by
           conventional method.

        -  The PEKK framework will be veneered with zirconia and the cobalt chromium will be
           veneered with porcelain.

        -  Implant supported fixed detachable prostheses using PEKK framework or cobalt-chromium
           framework will be screw retained to conventional implants.
    

Intervention name(s): implant placement
Intervention type(s): Procedure
Intervention description(s): 5 implant were placed in intraforaminal area using surgical guide
Other intervention name(s): final prostheses was made on 5 implants
Allocation: Randomized
Intervention model: Parallel Assignment
Intervention model description: to compare PEKK framework for hybrid prostheses ( fixed detachable ) versus PFM framework
Masking: Single (Investigator)
Primary purpose: Other
Keywords: hybrid prosthesis; PEKK framework; PFM framework