Stress distribution of an internal connection implant prostheses set: a 3D finite element analysis.
OBJECTIVE
This study evaluated the stress distribution by loads, under a internal connection implant system with two sort of abutment screws and prosthetic crown models at ten observation points.


METHODS
The analysis were made in two models with internal butt joint, and with gold and titanium screw, respectively. The load was 382N with 90 masculine to the occlusal surface and 15 masculine to the implant axis at 4 and 6 mm from the implant center.


RESULTS
In both models, a large amount of stress was located around the implant neck and little stress was concentrated along the abutment screw.


CONCLUSIONS
The simulations made suggest that the internal connection protects the abutment screw from the accumulated stresses; however, it exposes the implant walls to these stresses.
Segundo
Regenio Mahfuz Herbstrith
RM
Pontificia, Universidade Catolica do Rio Grande do Sul, Guadalupe 90/601, Jardim Lindoia, Porto Alegre, RS, Brazil. regesegundo@yahoo.com.br
Oshima
Hugo Mitsuo Silva
HM
da Silva
Isaac Newton Lima
IN
Burnett
Luis Henrique
LH
Mota
Eduardo Goncalves
EG
Silva
Liangrid Lutiani
LL
D000497:Alloys; D000538:Aluminum Silicates / Q000737:chemistry; D001696:Biomechanical Phenomena; D003198:Computer Simulation; D017076:Computer-Aided Design; D003442:Crowns; D000044:Dental Abutments; D003722:Dental Alloys / Q000737:chemistry; D015921:Dental Implants; D003764:Dental Materials / Q000737:chemistry; D003776:Dental Porcelain / Q000737:chemistry; D017267:Dental Prosthesis Design; D019094:Dental Prosthesis, Implant-Supported; D020342:Finite Element Analysis; D006047:Gold Alloys / Q000737:chemistry; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008422:Materials Testing; D008954:Models, Biological; D017680:Potassium Compounds / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
D000497:Alloys; D000538:Aluminum Silicates; D003722:Dental Alloys; D015921:Dental Implants; D003764:Dental Materials; D006047:Gold Alloys; D017680:Potassium Compounds; D003776:Dental Porcelain; C016447:feldspar; C031462:titanium alloy (TiAl6V4); D014025:Titanium