Your browser doesn't support javascript.
A Biblioteca Cochrane foi excluída da BVS por decisão da Wiley de não renovação da licença de uso com a BIREME. Saiba mais.

BVS Odontologia

Informação e Conhecimento para a Saúde

Home > Pesquisa > ()
Imprimir Exportar

Formato de exportação:

Exportar

Email
Adicionar mais destinatários
| |

[Influence of intra-pulpal temperature when using femtosecond laser in specific parameters to prepare cavities in tooth enamel: an in vitro study].

Sun, Yu-chun; Vorobyev, Anatoliy; Li, Hong; Guo, Chun-lei; Wang, Yong.
Beijing Da Xue Xue Bao Yi Xue Ban; 45(2): 286-90, 2013 Apr 18.
Artigo em Zh | MEDLINE | ID: mdl-23591353

OBJECTIVE:

To take the Real-time measurement of the intra-pulpal temperature (IPT) when using femtosecond laser in specific parameters to prepare cavities in tooth enamel in vitro, and to preliminarily evaluate the effect of air cooling.

METHODS:

All pulp champers of extracted human teeth (premolars and molars) were exposed by roots amputated and pulp scraped out. All chambers were tightly filled with copper powder, and thermocouple was inserted into the center of the powder stack. The bottom of the chamber was sealed with insulating tape. Thermocouple wire was fixed at the same time. The 2.25 mm×2.25 mm square cavities were prepared using femtosecond laser in the enamel with the average scan speed of 0.4 mm/s. The real-time IPT change was measured with thermocouple digital thermometer. Air cooling was added to the procedure once the temperature increased to reach a balance.

RESULTS:

The IPT rising was defined as ΔT . Before the usage of air cooling, the maximum of the ΔT value of the sample premolar was 12.3 °C. After using air cooling, the IPT decreased and ΔT value became 3.0 °C . The maximum of ΔT of the sample molar before using air cooling was 1.8 °C , and decreased to -0.1 °C after it.

CONCLUSION:

When preparing a cavity whose average depth is about 250 µm by femtosecond laser system in specific parameters, the IPT rises while the depth increass, but it could be controlled effectively by air cooling.