Pulpal blood flow recorded from exposed dentine with a laser Doppler flow meter using red or infrared light.
Arch Oral Biol
; 87: 163-167, 2018 Mar.
Article
en En
| MEDLINE
| ID: mdl-29304423
ABSTRACT
OBJECTIVE:
To determine the percentage of the blood flow signal that is derived from dental pulp when recording from exposed dentine in a human premolar.DESIGN:
Recordings were made from 7 healthy teeth in 5 subjects (aged 22-33 yr.) with a laser Doppler flow meter (Periflux 4001) using either a red (635â¯nm) or an infrared (780â¯nm) laser. After exposing dentine above the buccal pulpal horn (cavity diam. 1.6â¯mm, depth 3â¯mm) and isolating the crown with opaque rubber dam, blood flow was recorded alternately with infrared or red light from the exposed dentine under four conditions before and after injecting local anaesthetic (3% Mepivacaine without vasoconstrictor) (LA) over the apex of the root of the tooth; after exposing the pulp by cutting a buccal, class V cavity in the tooth; and after sectioning the coronal pulp transversely through the exposure.RESULTS:
There was no significant change in mean blood flow recorded with either light source when the tooth was anaesthetized or when the pulp was exposed. After the pulp had been sectioned, the blood flow recorded with infrared light fell by 67.8% and with red light, by 68.4%. The difference between these effects was not significant.CONCLUSIONS:
When recording blood flow from exposed coronal dentine with either infrared or red light in a tooth isolated with opaque rubber dam, about 68% to the signal was contributed by the pulp. The signalnoise ratio was better with infrared than red light, and when recording from dentine than enamel.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Diente Premolar
/
Flujometría por Láser-Doppler
/
Pulpa Dental
Límite:
Adult
/
Humans
Idioma:
En
Revista:
Arch Oral Biol
Año:
2018
Tipo del documento:
Article
País de afiliación:
Tailandia