Maxillary Bone Defect Reconstruction Using Porous Polyethylene Implants

Purpose: 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 max- illary 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 connec- tive tissue in 58.5% and 58.7% in the control group and the porous polyethylene group, respectively. In the contact surface with Med- por, 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.

Pâmela Letícia dos Santos
Joel Ferreira Santiago Jr
Daniela Ponzoni
Alessandra Marcondes Aranega
Thallita Pereira Queiroz
Osvaldo Magro Filho
Idelmo Rangel Garcia Jr

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