title: Bone Height Changes of the Mandibular Edentulous Ridge in Screw Retained Versus Telescopic Restorations for Completely Edentulous Patients.
abstract: OBJECTIVE
  This study was established to evaluate the amount of bone height changes in the posterior mandibular area of edentulous patients receiving screw-retained prostheses versus removable telescopic implant overdentures.
  
  
  METHODS
  Every patient received four inter-foraminal implants regarding the mandibular arch and four anterior implants for the maxillary arch, computer guided surgical guides were planned for the insertion of the implants accurately with a flapless technique. Panoramic radiographs were made immediately, six months and twelve months after the prostheses` use proportional area and vertical measurements were applied to determine changes in the bone height of the posterior mandibular edentulous area.
  
  
  RESULTS
  After twelve months, a statistically non-significant amount of bone resorption was reported for both groups.
  
  
  CONCLUSIONS
  Up to the limitations of this study both treatment options the screw retained and telescopic overdenture can be used for rehabilitation of completely edentulous patients. These cases must be followed for a longer period to have a definite answer regarding their efficiency in the long run.
authors.affiliation: National Research Center, Fixed and Removable Prosthodontics, Cairo, Egypt.
authors.forename: Eman
authors.initials: E
authors.lastname: Helal
authors.affiliation: National Research Center, Fixed and Removable Prosthodontics, Cairo, Egypt.
authors.forename: Mohamed
authors.initials: M
authors.lastname: El-Zawahry
authors.affiliation: Faculty of Oral and Dental Medicine, Oral and Maxillofacial Surgery, Cairo University, Cairo, Egypt.
authors.forename: Ayman
authors.initials: A
authors.lastname: Gouda
authors.affiliation: Egypt Faculty of Oral and Dental Medicine, Prosthodontics, Cairo University, Cairo, Egypt.
authors.forename: Amr Hosny
authors.initials: AH
authors.lastname: Elkhadem
authors.affiliation: Egypt Faculty of Oral and Dental Medicine, Prosthodontics, Cairo University, Cairo, Egypt.
authors.forename: Samira Ibrahim
authors.initials: SI
authors.lastname: Ibrahim
keywords: Dental implants; bone height; index area; mandible; screw retained; telescopic overdenture