STEEL SCALPEL VS OBSIDIAN SCALPEL TRIAL

La variation de la vitesse de tirage est en corrélation avec la distribution des bulles, la ségrégation du Ce et l’atténuation. Nous avons étudié tous ces phénomènes ainsi que les mécanismes mis en jeu. La ségrégation du Cérium et la propagation de la lumière ainsi que l’atténuation dans les fibres YAG-dopées Cérium (Ce3+) ont été étudiées en fonction des vitesses de tirage.

En fonction des conditions de tirage (gradient de température, orientations cristallographiques des germes, vitesses de tirage), nous nous sommes intéressés à l’étude des bulles et des contraintes résiduelles dans le saphir tiré par µ-PD. Elles sont susceptibles d’être utilisées dans un large domaine d’applications, d’où la nécessité de contrôler et de maitriser la technologie de fabrication.

Les fibres monocristallines de saphir et du YAG dopées Cérium (Ce3+) sont des formats à forte valeur ajoutée. La course à la croissance cristalline, la fabrication de fibres cristallines performantes et la maitrise des procédés sont des enjeux de recherche dans un nombre important de laboratoires à travers le monde. In the end, perspectives on the trends and future development of single crystal fibers are discussed.ĭans le domaine de la cristallisation des fibres monocristallines par la technique de la micro-pulling down (µ-PD), les résultats récents sur les performances des fibres monocristallines (optique, laser, scintillateur) ont montré l’étendue des champs d’applications ouverts aux fibres cristallines. In all cases, the application-oriented point of view provides the reader with an up-to-date panorama of the vast possibilities offered by SCF. This article introduces the development of SCF growth techniques, with particular emphasis on recent practical applications including temperature sensing, radiation environment sensing, fiber laser and power delivery, chemical and medical application, imaging application, and piezoelectric application. These optical fiber growth techniques are powerful material research tools employed globally for both scientific inquiry and practical applications. Solid state crystal growth and temperature gradient technology are also very active recently making small size SCF. Nowadays, edge-defined film-feed growth, micro-pulling down, and laser heated pedestal growth are three major techniques for the fabrication of SCF. The state of the art of single crystal fiber (SCF) fabrication has evolved and improved over the last five decades. The cosmetic outcomes of cutaneous excisions performed with the diamond laser scalpel are equivalent to excisions performed with steel scalpels with electrocoagulation for hemostasis. The diamond laser scalpel scored higher on intra-operative coagulation (P = 0.20) although these differences were not statistically significant. The mean residual thermal damage was 350.3 microm (95% CI +/- 37 microm, P < 0.001). Investigator assessment showed no statistically significant differences between the diamond laser scalpel side and the steel scalpel side with respect to bleeding, bruising, swelling, pain, dehiscence, or final scar appearance. Histologic evaluation was performed on all excisions for collateral thermal damage. The final scar was evaluated at 8-12 weeks for cosmetic outcome and three physicians blinded to the method of excision evaluated photographs of the wounds. Blinded assessment of adverse events and photographs were taken at 1 day, 7-10 days, 4 weeks, and 8-12 weeks. The Clinicon SureBlade diamond laser scalpel was used with the Luxar CO(2) attachment at the 6-8-W settings. Fusiform excisions were performed using the diamond laser scalpel on one half of each excision and a steel scalpel with electrocoagulation for hemostasis on the other half.

STEEL SCALPEL VS OBSIDIAN SCALPEL TRIAL

To compare the cutaneous wound healing using the diamond laser scalpel with wound healing using a steel scalpel and electrocoagulation for hemostasis.Ī prospective and randomized, comparative trial was conducted on eighteen patients.

Steel scalpel vs obsidian scalpel