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Fracture load of nano-ceramic composite material for anterior endocrown restorations / Carga de fratura de material compósito nano-cerâmico para restaurações endocrown anteriores
Alghalayini, Salma; Ebeid, Kamal; Aldahrab, Ayman; Wahsh, Marwa.
Affiliation
  • Alghalayini, Salma; Ain Shams University. Faculty of Dentistry. Department of Fixed Prosthodontics. EG
  • Ebeid, Kamal; Ain Shams University. Faculty of Dentistry. Department of Fixed Prosthodontics. EG
  • Aldahrab, Ayman; King Abdulaziz Universit. Department of Prosthodontics. Jeddah. SA
  • Wahsh, Marwa; Ain Shams University. Faculty of Dentistry. Department of Fixed Prosthodontics. EG
Braz. dent. sci ; 23(1): 1-9, 2020. ilus, graf
Article in En | LILACS, BBO | ID: biblio-1049285
Responsible library: BR243.1
ABSTRACT

Objective:

to evaluate ability of Nano Ceramic Composite endocrown to withstand occlusal forces when used in the anterior region. Material and

Methods:

eighty endodontically treated maxillary central incisors teeth were randomly divided into two main groups according to the restoration type. Forty of these teeth were post, core and crown restorations and 40 were endocrown restorations. Then they were divided by halves into two subgroups according to the material used 20 were made with Lava Ultimate and the other 20 with IPS e.max. Each subgroup was then further subdivided into two divisions according to the remaining tooth structure above the CEJ (n = 10) 2 mm and 0.5 mm above the CEJ. After teeth preparation, the restorations were all made by CAD/CAM system (Cerec MCXL). All samples had undergone cyclic fatigue testing, and then loaded to fracture using a universal testing machine. The specimens were measured and statistically analyzed using Mann-Whitney test for comparing the mean changes between the groups.

Results:

Lava Ultimate showed higher mean fracture load values than IPS e.max specimens.

Conclusions:

endocrowns were found to be more favorable when used on endodontically treated teeth than the conventional post, core and crown restorations.(AU)
RESUMO

Objetivo:

Avaliar a capacidade do compósito nanocerâmico endocrown para suportar forças oclusais quando usado na região anterior. Material e

Métodos:

Oitenta incisivos centrais superiores tratados endodonticamente foram divididos aleatoriamente em dois grupos principais, de acordo com o tipo de restauração. Quarenta desses dentes receberam restaurações com retentor intrarradicular, núcleo e coroa e 40 receberam restaurações endocrown. Em seguida, foram divididos pela metade em dois subgrupos, de acordo com o material utilizado, sendo 20 confeccionados com Lava Ultimate e os demais 20 com IPS e.max. Cada subgrupo foi posteriormente subdividido em dois, de acordo com a estrutura dentária remanescente acima da JEC (n = 10) 2 mm e 0,5 mm acima do JEC. Após o preparo dos dentes, todas as restaurações foram realizadas pelo sistema CAD/ CAM (Cerec MCXL). Todas as amostras foram submetidas a testes de fadiga cíclica e submetidas ao esforço até a fratura em uma máquina universal de testes. As amostras foram medidas e analisadas estatisticamente pelo teste de MannWhitney para comparação das alterações médias entre os grupos.

Resultados:

lava Ultimate apresentaram valores médios mais altos de carga até a fratura do que as amostras IPS e.max.

Conclusões:

as endocrowns mostraram-se mais favoráveis quando utilizadas em dentes tratados endodonticamente do que as restaurações convencionais com retentor intrarradicular, núcleo e coroa.(AU)
Subject(s)
Key words

Full text: 1 Index: LILACS Main subject: Bite Force / Ceramics / Composite Resins / Fractures, Bone Type of study: Clinical_trials Language: En Journal: Braz. dent. sci Journal subject: ODONTOLOGIA / Sa£de Bucal Year: 2020 Type: Article

Full text: 1 Index: LILACS Main subject: Bite Force / Ceramics / Composite Resins / Fractures, Bone Type of study: Clinical_trials Language: En Journal: Braz. dent. sci Journal subject: ODONTOLOGIA / Sa£de Bucal Year: 2020 Type: Article