title: Maxillary bone defect reconstruction using porous polyethylene implants.
abstract: OBJECTIVE
  The aim of this study was to evaluate the bone repair process in the maxillary sinus in monkeys treated with high-density porous polyethylene (Medpor)
  
  
  METHODS
  Four capuchin monkeys (Cebus apella) were submitted to bilateral horizontal osteotomies in the anterior wall of the maxillary sinus and divided into 2 groups: control group, left side with no implants, and porous polyethylene group, right side with Medpor. After a period of 145 days after implant placement, the maxillae were removed for histologic and histometric analyses.
  
  
  RESULTS
  Bone repair in osteotomized areas took place by connective tissue in 58.5% and 58.7% in the control group and the porous polyethylene group, respectively. In the contact surface with Medpor, bone repair occurred in 41.3%.
  
  
  CONCLUSIONS
  Medpor was not reabsorbed within the period of this study and allowed bone repair surrounding it. The porous polyethylene constitutes a feasible alternative for bone defect reconstruction.
authors: Department of Surgery and Integrated Clinics, School of Dentistry, Univiversidade Estadual Paulista, Araçatuba, Araraquara, São Paulo, Brazil. pamelalsantos@hotmail.com
authors: Pâmela Letícia
authors: PL
authors: Dos Santos
authors: Joel Ferreira
authors: JF
authors: Santiago
authors: Daniela
authors: D
authors: Ponzoni
authors: Alessandra Marcondes
authors: AM
authors: Aranega
authors: Thallita Pereira
authors: TP
authors: Queiroz
authors: Osvaldo Magro
authors: OM
authors: Filho
authors: Idelmo Rangel
authors: IR
authors: Garcia
mesh_terms: D000818:Animals; D001672:Biocompatible Materials; D002428:Cebus; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D008443:Maxillary Sinus / Q000601:surgery*; D016348:Osseointegration; D010027:Osteotomy; D011095:Polyethylenes; D016062:Porosity
chemical_list: D001672:Biocompatible Materials; D015921:Dental Implants; C084562:Medpor; D011095:Polyethylenes