The effect of diameter of the screw-access hole on the implant prosthodontic system and surrounding cortical bone-A 3D finite element analysis / 实用口腔医学杂志
Journal of Practical Stomatology
; (6): 182-187, 2018.
Artigo
em Chinês
| WPRIM (Pacífico Ocidental)
| ID: wpr-697481
Biblioteca responsável:
WPRO
ABSTRACT
Objective:
To investigate the stress and stress distribution generated on each component of implant prosthodontic system and surrounding cortical bone when different diameters of screw-access hole (SAH) were prepared on molar crown.Methods:
A fimite element(FE) model of partial mandible without first molar was set up, and an Bego implant was insert into it. A total of 5 models of the crown were computer-simulated by varying the diameter (Φ = 0-4 mm) of the SAH. The loading forces were 200 N axially (0°) and 100 N obliquely (45°) respectively on occlusive surface. The FE analysis was performed by computer.Results:
Φ ≤3 mm stress on occlusal surface of crown was almost unchanged and mainly distributed in the loading area. Φ = 4 mm, stress appeared an obvious rise and reached the maximum, the stress concentration under vertical load was changed to the hole margin. In vertical loading, screw could remain at a relatively low stress level when diameter did not exceed 1 mm. No changes on other components was observed.Conclusion:
SAH diameter of 1 mm is recommended when a cement-and screw-retained crown is used in posterior region.
Texto completo:
Disponível
Base de dados:
WPRIM (Pacífico Ocidental)
Idioma:
Chinês
Revista:
Journal of Practical Stomatology
Ano de publicação:
2018
Tipo de documento:
Artigo