The impact of different surface treatments on repair bond strength of conventionally, subtractive-, and additive-manufactured denture bases.
J Esthet Restor Dent
; 36(9): 1337-1347, 2024 Sep.
Article
em En
| MEDLINE
| ID: mdl-38747067
ABSTRACT
OBJECTIVE:
This study aimed to examine the shear bond strength (SBS) of repair material to conventionally, subtractive-, and additive-manufactured denture bases after different surface treatments. MATERIALS ANDMETHODS:
Disk-shaped test specimens (N = 300) were prepared from denture base materials produced by one conventional (Procryla), one subtractive (Yamahachi), and one additive (Curo Denture) method. The test specimens were randomly divided into five groups (n = 10) and exposed to a variety of surface treatments-Group A no surface treatment; Group B grinding with silicon carbide paper; Group C sandblasting; Group D erbium yttrium-aluminum-garnet laser; and Group E plasma. Repair was performed with autopolymerizing acrylic resin (Meliodent). Surface roughness analyses were performed with a profilometer. Scanning electron microscopy was used to examine one specimen from each subgroup. SBS was evaluated on a universal testing machine. Failure types were observed under a stereomicroscope.RESULTS:
Surface roughness values were significantly higher in all test materials in Group D than in the other groups (p < 0.001). For conventional resin, the SBS values were higher in Group C than in Groups A, D, and E (p < 0.001). For CAD/CAM material, Groups B and C had significantly greater SBS increases compared with Group E (p < 0.001). For 3D material, Group D showed higher SBS than all groups except Group C (p < 0.001).CONCLUSIONS:
For SBS, sandblasting was most effective in the conventional group, whereas laser treatment was the most effective in the additive-manufactured group. For the subtractive group, surface treatments other than plasma exhibited similar SBS. CLINICALSIGNIFICANCE:
In repairing fractured prostheses, any degree of roughening suitable for the material content may provide an SBS benefit.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Propriedades de Superfície
/
Bases de Dentadura
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article