It was concluded that (i) in all groups the investigations failed to predictably obtain complete defect resolution, (ii) the surgical procedure was associated with high exposure rates, and (iii) RBL was closely correlated with HBL.

Extracted tooth roots revealed a structural and biological potential to serve as an alternative autograft to autogenous bone. A higher exposure rate may be expected when using endodontically treated teeth.

The progression of experimental mucositis was comparable at all implant surfaces investigated.

Herten M., Jung, R.E., Ferrari D., Molenberg A., Hämmerle C.H., Becker J., Schwarz F.Biodegradation of different synthetic hydrogels made of polyethylene glycol (PEG). An immunohistochemical study in rats. Clin Oral Impl Res. Aim:The aim of the present study was to investigate the pattern of biodegradation of different polyethylene glycol (PEG) hydrogel/ RGD-peptide modifications in rats. Conclusion:Within the limits of the present study, it was concluded that (i) all membranes investigated revealed a high biocompatibility and tissue integration, and (ii) hydrogel biodegradation was dependent on PEG composition.3