PMID- 33465859 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210120 IS - 2373-9878 (Electronic) IS - 2373-9878 (Linking) VI - 2 IP - 4 DP - 2016 Apr 11 TI - Polymer-Based Local Antibiotic Delivery for Prevention of Polymicrobial Infection in Contaminated Mandibular Implants. PG - 558-566 LID - 10.1021/acsbiomaterials.5b00545 [doi] AB - Antibiotic-releasing porous poly(methyl methacrylate) (PMMA) space maintainers, comprising PMMA with an aqueous porogen and a poly(DL-lactic-co-glycolic acid) (PLGA) antibiotic carrier, have been developed to facilitate local delivery of antibiotics and tissue integration. In this study, clindamycin-loaded space maintainers were used to investigate the effects of antibiotic release kinetics and dose upon bacterial clearance and bone and soft tissue healing in a pathogen-contaminated rabbit mandibular defect. Three formulations were fabricated for either high dose burst release (7 days) or with PLGA microparticles for extended release (28 days) at high and low dose. Although inoculated bacteria were not recovered from any specimens, the burst release formulation showed less inflammation and fibrous capsule formation and more bone formation close to the implant than the low dose extended release formulation by histologic analysis. These results suggest that local antibiotic release kinetics and dose affect soft and hard tissue healing independent from its ability to clear bacteria. FAU - Shah, Sarita R AU - Shah SR AD - Department of Bioengineering, Rice University, Houston, Texas 77030, United States. FAU - Tatara, Alexander M AU - Tatara AM AD - Department of Bioengineering, Rice University, Houston, Texas 77030, United States. FAU - Lam, Johnny AU - Lam J AD - Department of Bioengineering, Rice University, Houston, Texas 77030, United States. FAU - Lu, Steven AU - Lu S AD - Department of Bioengineering, Rice University, Houston, Texas 77030, United States. FAU - Scott, David W AU - Scott DW AD - Department of Statistics, Rice University, Houston, Texas 77251, United States. FAU - Bennett, George N AU - Bennett GN AD - Department of BioSciences, Rice University, Houston, Texas 77005, United States. FAU - van den Beucken, Jeroen J J P AU - van den Beucken JJJP AD - Radboud University Medical Center, Nijmegen, The Netherlands. FAU - Jansen, John A AU - Jansen JA AD - Radboud University Medical Center, Nijmegen, The Netherlands. FAU - Wong, Mark E AU - Wong ME AD - University of Texas Health Science Center at Houston, Houston, Texas 77030, United States. FAU - Mikos, Antonios G AU - Mikos AG AD - Department of Bioengineering, Rice University, Houston, Texas 77030, United States. LA - eng PT - Journal Article DEP - 20160324 PL - United States TA - ACS Biomater Sci Eng JT - ACS biomaterials science & engineering JID - 101654670 SB - IM OTO - NOTNLM OT - PLGA OT - PMMA OT - controlled antibiotic release OT - odontogenic infection OT - osteomyelitis EDAT- 2016/04/11 00:00 MHDA- 2016/04/11 00:01 CRDT- 2021/01/20 01:00 PHST- 2021/01/20 01:00 [entrez] PHST- 2016/04/11 00:00 [pubmed] PHST- 2016/04/11 00:01 [medline] AID - 10.1021/acsbiomaterials.5b00545 [doi] PST - ppublish SO - ACS Biomater Sci Eng. 2016 Apr 11;2(4):558-566. doi: 10.1021/acsbiomaterials.5b00545. Epub 2016 Mar 24.