Effects of copper vapor laser irradiation (λ = 510.6 nm) on the enamel and dentine of human teeth: An ultra-structural morphologic study

Objective: A morphological and ultra-structural study of copper vapor laser (λ = 510.6 nm) effects on enamel and dentine was performed to show the effects of this radiation. Methods: A total of 15 human molars were cut in half; 15 pieces were separated for irradiation on enamel and 15 for dentine. These two groups were further divided into five experimental groups, including a control group, comprised of three half-sections each, irradiated by a CVL laser with a power of 7 W, a repetition rate of 15,000 pulses/sec and exposed at 500, 600, and 800 msec and 1 sec irradiation times with a 5-sec interval between irradiations. Results: In an ultra-structural SEM exam, we observed that on the enamel surfaces irradiated for 1 sec there was morphological alteration that consisted of catering, flaking, and melting on the surfaces. There was no alteration for the other exposure times. On the dentine teeth irradiated for 1 sec, we observed an evident ultra-structural alteration of melted tissue and loss of morphological characteristics. In the dentine group irradiated by 800 msec, we observed ablation and a partial loss of morphological characteristics. In the dentine groups irradiated by 500 and 600 msec, no alteration was observed. Conclusions: The results showed that irradiation with CVL promoted morphologic changes in the enamel as well as in the dentine and demonstrated a need for future studies in order to establish a safe protocol for further use in the odontological practice.

Na 50 Nachlass Arthur Schopenhauer - 'Schopenhauer-Archiv', 510 - Konzeptschreiben und Abschrift des Briefes an Abraham Ludwig Muhl wegen der Zurückweisung der vorgeschlagenen finanziellen Entschädigung

u.a.: Hinrich Burghart Abegg;

Na 1 Nachlass Max Horkheimer, 510 - Korrespondenzen mit Theodor W. Adono (p. VI 2, 1 - 212)

Briefwechsel zwischen Theodor W. Adono, Gretel Adorno und Max Horkheimer, 1955-1957; 1 Brief der Gesellschaft für soziale Betriebspraxis an Theodor W. Adorno und Max Horkheimer, 30.08.1955; 1 Brief der Gesellschaft für soziale Betriebspraxis mbH in Düsseldorf an das Rationalisierungs-Kuratorium der Deutschen Wirtschaft RG Mensch und Arbeit in Frankfurt; 1 Brief von Theodor W. Adorno an Elisabeth Calvelli-Adorno, 19.08.1955; 5 Briefe zwischen Alice Maier und Theodor W. Adorno, 1955-1956; 2 Briefe von Theodor W. Adorno an Frederick Polock, 1955; 1 Brief von Theodor W. Adorno an Herrn Ritter, Dekan der Philosphischen Fakultät der Johann Wolfgang Goethe-Universität Frankfurt am Main, 24.05.1955; 1 Brief von Marianne Regensburger an Theodor W. Adorno, 1955; 1 Brief von Marianne Regensburger an Walter Abendroth, Berlin-Schöneberg, 11.05.1955; 1 Brief von Theodor W. Adorno an Herrn von Staa, 24.03.1955; 1 Brief von Theodor W. Adorno an Herrn Kux, 08.03.1955; 1 Briefentwurf von Theodor W. Adorno an Gottfried Weber, Dekan der Philosophischen Fakultät der Johann Wolfgang Goethe-Universität Frankfurt am Main, 1956; 1 Brief von Theodor W. Adorno an Renato Solmi, 04.09.1956; 1 Brief von Theodor W. Adorno an das Kuratorium der Johann Wolfgang Goethe-Universität in Frankfurt am Main, 27.03.1956;

Ms.Ff.F.Stoltze 3. 510 - Brief von Friedrich Stoltze an Marie Stoltze

Friedrich Stoltze II, Finanzen, Nachrichten aus Frankfurt, Wahlen, Hermann Stoltze, Marie Geisselbrecht