Influence of thread design on implant positioning in immediate implant placement.
BACKGROUND
It is generally believed that implants placed in extraction sockets have a tendency to shift in the facial direction during insertion. The purpose of this study is to investigate the effect of different thread designs on the final implant position in immediate implant placement.


METHODS
In a split-mouth design involving 11 cadaver heads, each specimen received two implants, one with a square and one with a V-shaped thread design, in maxillary incisor extraction sockets. The facio-lingual locations of the drills and the implant were tracked, and the displacements were compared between the two groups.


RESULTS
No statistically significant differences were observed between the square and V-shaped thread design groups. The mean displacements of the different groups showed a general tendency of the implants to be positioned facially compared with the initial drill trajectory. This tendency was greater for implants with square thread design.


CONCLUSIONS
There was no significant effect of implant thread design on the positioning of implants in extraction sockets.
Department of Periodontics and Oral Medicine, School of Dentistry, University of Michigan, Ann Arbor, MI, USA.
Tapan
T
Koticha
Jia-Hui
JH
Fu
Hsun-Liang
HL
Chan
Hom-Lay
HL
Wang
D000704:Analysis of Variance; D002102:Cadaver; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D017267:Dental Prosthesis Design; D006801:Humans; D010865:Pilot Projects; D013997:Time Factors; D020390:Tooth Socket / Q000601:surgery
D015921:Dental Implants