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.
Pontificia, Universidade Catolica do Rio Grande do Sul, Guadalupe 90/601, Jardim Lindoia, Porto Alegre, RS, Brazil. regesegundo@yahoo.com.br
Regenio Mahfuz Herbstrith
RM
Segundo
Hugo Mitsuo Silva
HM
Oshima
Isaac Newton Lima
IN
da Silva
Luis Henrique
LH
Burnett
Eduardo Goncalves
EG
Mota
Liangrid Lutiani
LL
Silva
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