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Tissue response to poly-L-lactide acid-polyglycolic acid absorbable screws in autogenous bone grafts: a histologic
Mariza Akemi Matsumoto1, Hugo Nary Filho, Luís Eduardo Marques Padovan
1Department of Oral and Maxillofacial Surgery, Universidade do Sagrado Coração, Rua Rio Branco 19-79, Altos da Cidade, 17014-480 Bauru/São Paulo, Brazil.
Objectives:
To evaluate the local bone condition of autogenous chin grafts in contact with resorbable polymers fixation devices.
Material And Methods:
Seven patients presenting severe maxillary and mandibular atrophy underwent alveolar ridge reconstruction with autogenous chin grafts fixed with conventional metallic screws, who received poly L-lactide acid-polyglycolic acid and titanium test screws for histological evaluation after 4 months of implantation.
Results:
Viable bone tissue could be seen in the specimens related to titanium test screws, with no signs of bone resorption or inflammation. A thick layer of fibrous connective tissue was observed between the resorbable test screws and bone tissue, which presented a few areas of resorption.
Conclusion:
There are no contraindications of both materials for use as fixation devices in autogenous bone grafts. However, care must be taken when using absorbable screws in a period of 4 months, which can interfere with the sequence of the treatment with endosseous dental implants.
