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Updated: Oct 24, 2026
Biological Compatibility Profile on Biomaterials for Bone Regeneration
Published on: November 16, 2018
Clinical and microbiological observations of early polytetrafluoroethylene membrane exposure in guided bone
M E Fritz1, P I Eke, J Malmquist
1Department of Surgery, Emory University School of Medicine, Atlanta, GA, USA.
Abstract:
Premature membrane exposure at one week is described in 3 Macaca mulatta monkeys as part of a sequence of experiments on guided bone regeneration. Clinical sequelae include redness, edema, and tissue slough. Bacteroides fragilis, Streptococcus pneumoniae, Prevotella intermedia, and Staphylococcus intermedius were detected at all prematurely exposed sites. Pseudomonas maltophilia, Strept, pneumoniae, and P. intermedia were the predominant organisms detected and consisted of more than 10% of the total anaerobic count.
Insights
Premature membrane exposure in Macaca mulatta monkeys led to clinical issues like redness and tissue slough. Bacterial analysis revealed specific organisms, including Prevotella intermedia and Streptococcus pneumoniae, at exposed sites.
Area of Science:
- Veterinary Medicine
- Primate Research
- Oral Surgery
Background:
- Guided bone regeneration (GBR) is a critical surgical technique.
- Membrane exposure can compromise GBR outcomes.
- Understanding the microbial environment post-exposure is vital.
Purpose of the Study:
- To document clinical sequelae of premature membrane exposure in a primate model.
- To identify the microbial flora present at prematurely exposed GBR sites.
Main Methods:
- Three Macaca mulatta monkeys underwent GBR procedures.
- Membranes were prematurely exposed at one week post-surgery.
- Clinical observations and microbial sampling were performed.
Main Results:
- Clinical signs included redness, edema, and tissue sloughing.
- Bacteroides fragilis, Streptococcus pneumoniae, Prevotella intermedia, and Staphylococcus intermedius were consistently detected.
- Pseudomonas maltophilia, S. pneumoniae, and P. intermedia were predominant anaerobes.
Conclusions:
- Premature membrane exposure in GBR procedures can lead to significant clinical complications.
- A polymicrobial flora, including specific anaerobic and aerobic bacteria, colonizes exposed sites.
- These findings highlight the importance of membrane integrity in GBR success.
