Original scientific paper
The Effects of C 02 and Nd:YAG Lasers on Periodontal Tissue in the Furcations of Molars
Silvana Jukić
; Zavod za bolesti zubi, Stomatološki fakultet Sveučilišta u Zagrebu, Gundulićeva 5, Zagreb, Hrvatska
Ivica Anić
; Zavod za bolesti zubi, Stomatološki fakultet Sveučilišta u Zagrebu, Gundulićeva 5, Zagreb, Hrvatska
Jasna TALAN HRANILOVIĆ
; Klinički zavod za patologiju “Ljudevit Jurak” Kliničke bolnice “Sestre Milosrdnice”, Vinogradska c. 29, Zagreb, Hrvatska
Dora Najžar-Fleger
; Zavod za bolesti zubi, Stomatološki fakultet Sveučilišta u Zagrebu, Gundulićeva 5, Zagreb, Hrvatska
Abstract
CO2 and Nd. YAG lasers are the most commonly used in medicine and dentistry. Due to atraumatic and efficient cutting of the soft tissue
they can be used for pulpotomy o f deciduous and young permanent teeth. The aim of this study was to evaluate the effect of these two lasers with energy parameters used for abblation o f soft tissues on the incidently irradiated periodontal tissue during pulpotomy.Mixed breed dogs weighing 25 kg were used for experiments. The animals were anesthetized with pentobarbital. Pulp chambers of molars were opened and pulp tissues removed with a sharp spoon. The floor of the pulp chamber was penetrated intentionally with a water cooling low speed steel bur. Periodontal tissue of the furcation region was irradiated with C 02 (2 W / 1 0 ms / 5x/s) i Nd. YAG (2W/ 20 pps) lasers for 3 s. Histological analysis made 30 and 45 days after treatment revealed superficial necrosis of bone, inflammatory infiltration and fragmentation of bone trabeculae. The first signs of bone healing appeared 45 days after treatment with the C 02 laser as formation of new bone matrix, osteoid. Nd. YAG laser penetrates deeper into bone tissue and causes more severe changes. Thus 45 days after lasing the bone with it there were no signs of healing.
Keywords
periodontal tissue, C 02 laser, Nd:YAG laser; histological analysis
Hrčak ID:
98249
URI
Publication date:
15.12.1998.
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