Sequential healing of the elevated sinus floor after applying autologous bone grafting: an experimental study in minipigs
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Data
2015-04-01
Autores
Scala, Alessandro
Lang, Niklaus P.
Cardoso, Leandro de Carvalho
Pantani, Fabio
Schweikert, Michael
Botticelli, Daniele [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Resumo
AimTo describe the sequential healing after elevation of the maxillary sinus mucosa applying the lateral access technique with the use of autogenous bone grafting without membrane to occlude the osteotomy access.Material and methodsImmediately after the elevation of the maxillary sinus Schneiderian membrane, applying the lateral access technique in 10 minipigs, autologous bone was harvested from the lateral aspect of the mandibular molar region and ground into particles with a bone mill. The space under the Schneiderian membrane was filled with this graft. No membranes were placed onto the access osteotomy. The healing was evaluated after 15, 30, 90 and 180days. Paraffin sections were prepared and analyzed histologically.ResultsAfter 15days of healing, the elevated area was mainly filled with provisional matrix, newly formed bone and some remnants of bone chips, and appeared reduced in volume compared with that at the time of surgery. After 30days of healing, further shrinkage of the height of the elevated space was found, with similar percentages of the different tissue components. After 90 and 180days, the area underneath the Schneiderian membrane appeared reduced in volume and condensed toward the base of the sinus. The bone tissues appeared to be more mature, both for the mineralized and the non-mineralized portions, while connective tissue occupied 20% of the space, most likely related to the lack of the use of a membrane occluding the access at the time of surgery.ConclusionsSuboptimal healing outcomes with respect to augmentation of the space under the sinus floor membrane were documented when autologous bone chips were used as a filler and no membrane was applied to cover the access.
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Palavras-chave
Animal study, utogenous bone, Autologous bone, Bone formation, Implant dentistry|Llateral approach, Schneiderian membrane, Sinus floor elevation
Como citar
Clinical Oral Implants Research. Hoboken: Wiley-blackwell, v. 26, n. 4, p. 419-425, 2015.