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Full-Text Articles in Orthodontics and Orthodontology
Effects Of The Orthodontic Miniscrew Geometric Design On The Bone Microdamage And Primary Stability, Panida Methawit
Effects Of The Orthodontic Miniscrew Geometric Design On The Bone Microdamage And Primary Stability, Panida Methawit
Chulalongkorn University Theses and Dissertations (Chula ETD)
This study investigated the effects of the pitch (P) and thread shape on orthodontic miniscrew cortical bone microdamage. The relationship between microdamage and primary stability was examined. Ti6Al4V orthodontic miniscrews had custom-made thread heights (H) and pitch sizes and were classified into the following groups: HCPC (control); HCPN (with a narrower pitch); and HTPC (with a taller thread height) (HC = 0.12 mm; HT = 0.36 mm; PC = 0.60 mm; PN = 0.30 mm). The orthodontic miniscrews were inserted in the pilot hole of prepared 1.0-mm-thick tibia cortical bone, and the maximum insertion torque (MIT) and Periotest value (PTV) …
Expression Of Superoxide Dismutase 3 (Sod3) During Orthodontic Tooth Movement In Rats, Phanchanit Jindarojanakul
Expression Of Superoxide Dismutase 3 (Sod3) During Orthodontic Tooth Movement In Rats, Phanchanit Jindarojanakul
Chulalongkorn University Theses and Dissertations (Chula ETD)
Hypoxia induces reactive oxygen species (ROS) production in periodontal tissues. Superoxide dismutase 3 (SOD3) is an enzyme protecting cells from ROS. This study investigated SOD3 expression and function during rat orthodontic tooth movement (OTM) and in hypoxia-exposed rat PDL cells. OTM of right maxillary first molars were performed in Sprague-Dawley rats for 1 and 14 days (n = 6 per group). SOD3 and HIF-1α expression were evaluated by immunohistochemistry. SOD3 effects on cell viability and proliferation, ROS production, and mRNA expression of Hif-1α, Rankl, and Opg in PDL cells and osteoclast differentiation were investigated under normoxia and hypoxia. SOD3 expression …