Pulpotomies with CO2 laser in dogs

Jose Antonio Po Figueiredo; Maria Cristina Chavantes M.D.; Marco Antonio Gioso; Hildeberto Francisco Pesce; Adib D. Jatene

doi:10.1117/12.207447

1 May 1995 Pulpotomies with CO₂ laser in dogs

Jose Antonio Po Figueiredo, Maria Cristina Chavantes M.D., Marco Antonio Gioso, Hildeberto Francisco Pesce, Adib D. Jatene

Author Affiliations +

Proceedings Volume 2394, Lasers in Dentistry; (1995) https://doi.org/10.1117/12.207447
Event: Photonics West '95, 1995, San Jose, CA, United States

Abstract

The aim of this study was to evaluate the clinical aspects of dental pulps submitted to shallow pulpotomy followed by CO₂ laser radiation at five different procedures. For this purpose, initially 66 dogs' teeth were opened and about 2 or 3 mm of coronal dental pulp was removed. Continuous irrigation with saline solution was implemented. The teeth were randomly divided into 6 groups of 11 each. After cessation of bleeding, in group I, CO₂ laser (Xanar-20, USA) was irradiated for 1 second at a power of 5 watts; in group II, 2 seconds at 3 watts; in Group III, 2 seconds at 5 watts; in Group IV, 1 second at 3 watts; in Group V, a continuous mode at 3 watts; Group VI served as a control, with no laser irradiation. The results showed no clinical differences between the 3 W and 5 W powers. Time period of irradiation exposition influenced definitively the clinical appearance of the dental pulps. Groups I and IV (1 second) were unable to stop the bleeding, which persisted over 15 minutes for all teeth. This may be due to the intense heat generated by CO₂ laser, causing vasodilatation. Groups II and III displayed a similar appearance, but bleeding stopped in about 10 minutes. Group V (continuous mode) had no bleeding after irradiation, but a plasma-like liquid would come out for almost 2 minutes. When comparing to the control (Group VI), all the pulps would assume a jelly-like aspect, with black granulated tissue on the surface, covering totally the pulps of Group V and partially the other groups. The histological results will be discussed in a further study. From the data obtained, it seems that CO₂ laser irradiation for pulpotomies should be done in a continuous mode, for clinical convenience in terms of time taken and effective irradiation.

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Jose Antonio Po Figueiredo, Maria Cristina Chavantes M.D., Marco Antonio Gioso, Hildeberto Francisco Pesce, and Adib D. Jatene "Pulpotomies with CO₂ laser in dogs", Proc. SPIE 2394, Lasers in Dentistry, (1 May 1995); https://doi.org/10.1117/12.207447

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KEYWORDS

Carbon dioxide lasers

Teeth

Laser irradiation

Tissues

Beam controllers

Carbon monoxide

Gas lasers

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