Comparison of color changes, fracture strengths, and failure modes of conventional endocrowns and endocrowns with different design modifications.
Technol Health Care
; 32(4): 2395-2408, 2024.
Article
en En
| MEDLINE
| ID: mdl-38427513
ABSTRACT
BACKGROUND:
Endocrowns (ECs) are alternatives for rebuilding severely damaged teeth and show superior efficacy in molars over premolars.OBJECTIVE:
The objective of this in vitro study is to evaluate the effects of different preparation designs with short pulp chambers on the mean color change (Δâ¢E), fracture resistance, and failure types of mandibular molar ECs.METHOD:
A total of 40 extracted mandibular molars were treated endodontically and divided into four groups. Samples in groups 1, 2, 3, and 4 had occlusal preparation depths of 5 mm, 3 mm, 3 mm with ferrule, and 3 mm with boxes, respectively. The samples were immersed in coffee and their Δâ¢E values were measured by using the Commission Internationale de l'Eclairage color system. They were also subjected to a fracture test. Next, all specimens were examined visually under a stereomicroscope to evaluate their failure modes and identify their fracture origins. Data were entered and analyzed by using Statistical Package for Social Sciences.RESULTS:
Among all groups, group 4 (3 mm + boxes) presented the highest Δâ¢E (4.15) after immersion in coffee. Moreover, ANOVA revealed that the Δâ¢E of group 4 (occlusal preparation depth of 3 mm with boxes) was significantly different (p< 0.05) from that of group 2 (3 mm + ferrule, 3.07). The EC with a 3 mm chamfer and ferrule showed the highest maximum load of 2847.68 ± 693.27 N, whereas that with a 5 mm chamfer finish line had a marginally reduced load at fracture of 2831.52 ± 881.83 N. The EC with a 3 mm chamber and boxes had a slightly increased maximum load of 2700.75 ± 436.40 N, whereas that with the 3 mm chamber had the lowest maximum load at fracture of 2385.97 ± 465.61 N. One-way ANOVA showed that different EC preparation designs had no effect on maximum fracture load (F [3,16] = 0.550, p= 0.6).CONCLUSION:
The recorded Δâ¢E values of ECs in all groups were equal or marginally higher than the acceptable values. The EC with a 3 mm chamfer and ferrule displayed the highest mean maximum load. The EC with a 5 mm chamfer finish line had a marginally lower maximum load at fracture than other ECs. Failures, such as ceramic fracture, split fracture, and ceramic and tooth splitting above the cemento-enamel junction (CEJ) or vertically were predominant in samples with occlusal preparation depths of 3 mm with ferrule and 5 mm.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Diente Molar
Límite:
Humans
Idioma:
En
Revista:
Technol Health Care
Asunto de la revista:
ENGENHARIA BIOMEDICA
/
SERVICOS DE SAUDE
Año:
2024
Tipo del documento:
Article
País de afiliación:
Arabia Saudita
Pais de publicación:
Países Bajos