Comparison of strength and failure mode of seven implant systems: an in vitro test.
BACKGROUND
The mechanical weakness of implant systems is a problem in the clinical situation.


OBJECTIVE
This study experimentally evaluated how joint design influences the strength and failure mode of dental implant systems.


METHODS
The strength tests focused on the systems as a whole. Seven implant systems with different joint design were evaluated.


RESULTS
Strength and failure mode varied significantly between the implant systems and deep joints, in contrast to shallow joints, favored resistance to bending moments. The mean failure force ranged between 138 to 693 Newtons for the various implant systems.


CONCLUSIONS
In construction of implant systems, joint depth should be taken into consideration.
Möllersten
L
L
School of Dentistry, Karolinska Institutet, Huddinge, Sweden.
Lockowandt
P
P
Lindén
L A
LA
D000704:Analysis of Variance; D003442:Crowns; D000044:Dental Abutments; D015921:Dental Implants; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000295:instrumentation; D005069:Evaluation Studies as Topic; D006047:Gold Alloys / Q000737:chemistry; D008422:Materials Testing; D018583:Pliability; D013314:Stress, Mechanical; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry; D019415:Torque
D015921:Dental Implants; D006047:Gold Alloys; D014025:Titanium