Reconstrução imediata de diferentes defeitos peri-implantares em implantes pós-exodônticos: análise histomorfométrica em cães

• Autor(a) principal: Pereira, Flávia Priscila [UNESP]
• Data de Publicação: 2013
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/108881
• topic: Ossos - Regeneração; Osseointegração; Implantes dentários; Substitutos ósseos; Dental implants

Objective: The purpose of these studies were to evaluate bone regeneration at natural or surgically-created buccal defects at implants placed immediately into extraction sockets (IPIES). Material and methods: Eight Labrador dogswere used and implants were placed immediately into the extraction sockets of P2 (second premolar ) and M1 (first molar), bilaterally. At P2, the buccal wall of the extraction sockets was removed bilaterally to create a standardized defect, 4 mm wide coronally, 2 mm wide apically, and 6 mm height. At P2 sites, Bio-Oss at the test (OB) or autogenous bone at the control (OA) sites were used to fill the defects. At M1 sites, Bone Ceramic ® at the test (BC) or the clot alone (COA) were used to fill the defects. All surgical sites were subsequently covered by a resorbable collagen membraneand a non-submerged healing was allowed . After 4 months the animals were euthanized, bone blocks harvested and processed for histomorphometric analysis . Results: at P2 sites, IS- C values were slightly higher (2.3±0.8mm) in the OA compared to the OB (1.7±0.7 mm). IS- B were 2.7 ± 0.7mm and 2.2 ± 1.0mm on the buccal side and 1.6 ± 0.8mm and 0.8 ± 0.5mm on the lingual side at OA and OB groups, respectively. The average values of PM- C , B - PM and PM -IS in OA and OB groups were 4.3 ± 0.9mm , 4.7 ± 0.9mm , 2.0 ± 1.6mm and 4.3 ± 0.6mm , 4.8 ± 0.6mm , 2.5 ± 0.8mm, respectively. A statistically significant difference was only observed in the thickness of the buccal bony crest at 2-5 mm apically to IS (the implant neck) when the biomaterial (S -OCbt )...