Lasers are used to modify the surfaces of dental implants or to decontaminate exposed implant surfaces. However, research is lacking on whether the laser causes any change on the surfaces of titanium implants. We aimed to determine the effects of laser treatment on the surface characteristics of titanium discs. Nine discs were fabricated using grade-V titanium with resorbable blast texturing surface characteristics. The discs were irradiated with an erbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) laser under different experimental conditions (R1-9). Scanning electron microscopy was used to evaluate implant surface topography qualitatively, and a mechanical contact profilometer was used to evaluate surface roughness. The R3 and R5 parameters caused no measurable change. Minor cracks and grooves were observed in discs treated with the R1, R2, R4, R7 and R9 parameters. Major changes, such as melting, flattening and deep crack formation, were observed in discs subjected to R6 (2 W, 30 Hz, 2 mm. distance, 30 s) and R8 (3 W, 25 Hz, 2 mm. distance, 45 s) parameters. The lowest surface roughness value was obtained with the R8 parameter. Irradiation distance, duration, frequency and power were the most significant factors affecting surface roughness. Parameters such as wavelength, output power, energy, dose and duration should be considered during irradiation. The results of this study indicate that the distance between the laser tip and the irradiated surface should also be considered.
Both mechanical and chemical methods can be used to clean and decontaminate implant surfaces. Incomplete debridement of infected tissue and failure to clear endotoxins can result in graft failure and a return of the defect. Recently, lasers have gained popularity for sterilizing and cleaning implant surfaces. We determined the effects of laser treatment on the surface characteristics of titanium discs with a Laser-Lok surface. The discs were irradiated with an erbium, chromium: yttrium, scandium, gallium, garnet (Er,Cr:YSGG) laser under various conditions (R1-9). Scanning electron microscopy was used to evaluate the surface. Considerable surface alterations such as melting and flattening were seen at R6 (2 W, 20 Hz, 4 mm, 45 s) and R8 (3 W, 25 Hz, 2 mm, 45 s). In addition, cracking was seen at R8. The laser parameters should be optimized to conserve surface characteristics during the irradiation of implant surfaces.
Background Tunneled catheters can be used as an alternative vascular access in patients with limited health expectancy,vascular access problems and several comorbidities. We aimed to present a patient with venous stenosis related- reversible acute Budd-Chiari syndrome after catheter malposition. Case presentation After changing of tunneled catheter insertion, 36-year old man was admitted to our hospital with sudden onset of nausea, fever, chills and worsening general condition In computed tomography (CT) imaging, a hypodense thrombus was observed in which the distal end of the catheter is at the level of drainage of the hepatic veins in the inferior vena cava and that blocked hepatic vein drainage around the catheter. The catheter was removed and a new catheter was inserted in the same session. Because patient’s general condition was good and without fever, he was discharged with advices on the 9th day of hospitalization. Conclusion Although catheter malposition and thrombosis are not a common complication, clinicians should be alert of these complications.
Dişeti çekilmelerinin tedavisinde pek çok yöntem vardır. Ancak Miller III ve Miller IV tip dişeti çekilmeleri zayıf prognoza sahiptir. Bukkal Yağ Dokusu (BYD), kemik, kıkırdak, yağ veya kasa dönüşebilen özel bir yağ dokusudur. Bu vaka raporunda şiddetli dişeti çekilmesi olan 2 hastanın saplı BYD kullanılarak tedavisi anlatılmıştır. Uygulama esnasında cerrahi aşamada alıcı alanda tam kalınlık flep kaldırılmıştır. Saplı BYD uygun cerrahi teknikle açığa çıkarılmıştır. BYD'nin gövdesi hareketlendirilerek mukozaya yakın şekilde dikilmiştir. Küçük bir parça yağ dokusu histolojik inceleme için ayrılmıştır. Damarlı flep üst 1. büyük azı dişinin bukkal yüzeyine sıkıca yerleştirilerek dikilmiştir. Bukkal flep de koronal şekilde pozisyonlandırılarak dikilmiştir. On iki hafta sonunda her iki vakada da dişeti çekilmesi azalmıştır. Klinik periodontal parametrelerde ve mobilitede iyileşme görülmüş; her iki vakada da keratinize dişeti dokusu belirgin şekilde izlenmiştir. Üç ay sonraki gingivoplasti aşamasında elde edilen küçük bir parça dişeti, histolojik inceleme için ayrılmış ve ilk histolojik örnekte damarlı yağ dokusu izlenmiştir. Elde edilen 2. örnekte ise Tip I kollajen lifler ve fibroblastlarla birlikte epitelizasyon ve epitel içinde papilla oluşumu izlenmiştir. BYD kullanımı, üst çene azı ve küçük azı dişlerinde, dişeti sağlığına olumlu etki ederek, kök yüzeyi örtülmesini sağlayabilir. Bu konuda ileri dönük, kontrollü, klinik çalışmalara ihtiyaç vardır. Anahtar kelimeler: Bukkal yağ dokusu, dişeti çekilmesi, kök yüzeyi örtülmesi
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.