The influence of different cement spaces on the marginal gap of lithium disilicate crowns constructed by two scanner and milling unit combinations.
Aust Dent J
; 69(3): 189-196, 2024 Sep.
Article
en En
| MEDLINE
| ID: mdl-38469907
ABSTRACT
BACKGROUND:
This study compared the marginal gaps of CAD/CAM lithium disilicate (LDS) crowns constructed using a contemporary and older scanner/milling unit combination at three different cement spaces.METHODS:
Twenty-four undergraduate students prepared a Columbia model lower left first molar for an LDS crown in a simulated environment. From each crown preparation, one LDS crown was constructed using an E4D scanner/E4D milling unit (E4DS/E4DM) and TRIOS 3 scanner/Sirona inLab MC X5 milling unit (TRIO/MCX5) at cement space settings of 50, 100 and 200 µm. Each LDS crown was positioned onto the original crown preparation, and then a stereomicroscope was used to make three vertical marginal gap measurements at four locations (mid-buccal, mid-lingual, mid-mesial and mid-distal). The mean marginal gap (MMG) was calculated for each crown and each individual tooth surface.RESULTS:
The MMGs of CAD/CAM LDS crowns constructed by TRIO/MCX5 were 72.31 at 50, 63.73 at 100 µm and 46.23 µm at 200 µm, which were smaller than E4DS/E4DM at each cement space.CONCLUSIONS:
Increasing the cement space decreased the MMG in both scanner/milling unit combinations. The smallest MMG was found using the newer scanner/milling unit at the 200 µm cement space. © 2024 Australian Dental Association.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Diseño de Prótesis Dental
/
Diseño Asistido por Computadora
/
Adaptación Marginal Dental
/
Coronas
/
Porcelana Dental
Límite:
Humans
Idioma:
En
Revista:
Aust Dent J
Año:
2024
Tipo del documento:
Article
País de afiliación:
Australia
Pais de publicación:
Australia