Effect of Block-out Spacer to Pick up Locator Attachments to Retain Overdenture: Peri-implant and Alveolar Bone Changes
Condition: Bone Loss
Study type: Interventional

Summary: 
      This study was conducted to radiographically evaluate peri-implant and alveolar bone height
      changes of locator attachments used for three implant assisted mandibular complete
      overdenture using two different pick up protocols.
    

Detailed description: 
      This clinical trial was done to evaluate the effect of using block-out spacer during picking
      up of locator attachments used for retaining 3 implant mandibular complete overdenture
      regarding peri-implant and alveolar bone height changes.

      Eighteen egyptian completely edentulous male patients were chosen from the Outpatient Clinic
      of the Prosthodontics Department, Faculty of Dentistry, Mansoura University, Egypt.

      Patients received three implants one anterior in midline area and two posterior at first
      molar area .

      Patients free from any systemic diseases relating to the bone resorption, not taking any
      drugs that interfere with bone quality .Patients with absolute contraindication for surgical
      implantation, general contraindication , relative contraindication ,local contraindication
      for surgical implantation , allergic reactions to titanium or to local anesthesia were
      excluded.

      The main question it aims to answer is whether to use block-out spacer during picking up of
      locator attachments used for retaining 3 implant mandibular complete overdenture or not.

        -  Participants were given antibiotic prophylaxis (clavulanic acid with amoxicillin 1 gm
           twice/day) one hour prior to surgery and continued for 6-7 days postoperative .Also, 50
           mg of non-steroid anti-inflammatory tablets and analgesic (Declophenac tab) were given
           twice daily for one week after surgery. In addition to, Antiseptic mouth wash (0.2%
           chlorohexidine) was started ten minutes before surgery and continued one week after
           surgery twice daily.

        -  Patients were asked for radiographic evaluation immediately (T0) and 6 (T6) then 12
           months (T12) after picking up of locator attachments.

      Researcher compared between Block out spacer group (BOS-G) and Without block out spacer group
      (WBOS-G)which were randomly assigned into two equal groups to see if using block out spacer
      during picking up of locator attachments used for retaining 3 implant mandibular complete
      overdenture is more beneficial regarding peri-implant and alveolar bone height changes or
      not.
    

Intervention name(s): Surgical placement of dental implants; Overdenture supported by locator attachment system
Intervention type(s): Procedure; Device
Intervention description(s): Three dental implants were placed (one anterior in midline area and two posterior at first molar area).; Implants were loaded after three months by using locator attachments.
Control group:Iocator attachments picked up using block out spacer.
Study group:Iocator attachments picked up without using block out spacer
Allocation: Randomized
Intervention model: Parallel Assignment
Intervention model description: Patients were randomly assigned into two equal groups . (BOS-G) Block out spacer group : patients who would be delivered mandibular implant overdenture retained by three locator attachments using block out spacer during pick up .(WBOS-G) Without block out spacer group : patients who would be delivered mandibular implant overdenture retained by three locator attachments without using block out spacer during pick up
Masking: Double (Participant, Outcomes Assessor)
Primary purpose: Treatment
Keywords: Peri-implant; Alveolar bone