20.500.12556/RUL-144444 The evolution of cavitation in narrow soft-solid wedge geometry mimicking periodontal and peri-implant pockets In periodontology and implantology, laser-induced cavitation has not yet been used to treat biofilm-related problems. In this study we have checked how soft tissue affects the evolution of cavitation in a wedge model representing periodontal and peri-implant pocket geometry. One side of the wedge model was composed of PDMS mimicking soft periodontal or peri-implant biological tissue, the other side was composed of glass mimicking hard tooth root or implant surface, which allowed observations of the cavitation dynamics with an ultrafast camera. Different laser pulse modalities, PDMS stiffness, and irrigants were tested for their effect on the evolution of cavitation in the narrow wedge geometry. The PDMS stiffness varied in a range that corresponds to severely inflamed, moderately inflamed, or healthy gingival tissue as determined by a panel of dentists. The results imply that deformation of the soft boundary has a major effect on the Er:YAG laser-induced cavitation. The softer the boundary, the less effective the cavitation. We show that in a stiffer gingival tissues model, photoacoustic energy can be guided and focused at the tip of the wedge model, where it enables generation of secondary cavitation and more effective microstreaming. The secondary cavitation was absent in severely inflamed gingival model tissue, but could be induced with a dual-pulse AutoSWEEPS laser modality. This should in principle increase cleaning efficiency in the narrow geometries such as those found in the periodontal and peri-implant pockets and may lead to more predictable treatment outcomes. cavitation soft-solid interface periodontal and peri-implant pockets secondary cavitation kavitacija Escherichia coli zobni vsadki obzobni žepek biofilm lasersko čiščenje true false true Angleški jezik Slovenski jezik Članek v reviji 2023-02-22 09:21:19 2023-02-22 09:21:20 2023-09-02 03:46:32 0000-00-00 00:00:00 2023 0 0 12 str. Vol. 94, art. 106329 Mar. 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 579.61:544.537 1350-4177 10.1016/j.ultsonch.2023.106329 141487619 1-s2.0-S135041772300041X-main_(1).pdf 1-s2.0-S135041772300041X-main_(1).pdf 1 973F9E23E89108C009E5F81C1A58B337 1beef6d4e78f41a992496c3a42864e684cbf665c7ef6d85eb1bc158b0dea2605 b27b5f5b-48cb-11ee-af86-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=173331 https://www.sciencedirect.com/science/article/pii/S135041772300041X 1 8976be5b-b289-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166753 Fakulteta za strojništvo Biotehniška fakulteta Medicinska fakulteta 0 0 0