Dental implant fracture is a rare biomechanical complication, however, one of the most serious and frustating ones as it is generally\r\nassociated with implant and prosthesis failure as well as the surgical hazards of explantation and reimplantation. To gain insights\r\ninto implant fracture rates and the impact of patient-, surgery-, and prosthetic-related factors, systematic review and meta-analysis\r\nof the English literature were performed. Electronic and hand searches yielded 69 relevant publications reporting on 827 fractures\r\nout of 44521 implants investigated. The overall incidence of implant fractures was 1.6%. Mean patient age at the time of implant\r\nfracture was 54 �± 11 years, and 70% occurred in males.Thevast majority (85%) occurred in posterior regions of themouth (premolar\r\nor molar positions). No tendency of increased fracture rates could be noted for short implant lengths or narrow implant diameters.\r\nImplant fractures occurred after 4.1 �± 3.5 years of loading, on average, in most cases (88%) supporting fixed restorations; however,\r\nonly 56% were preceded by screw loosening. Although further investigations are needed to fully explore the characteristics and\r\ncauses of this rare complication, it can be concluded that no more than 2.8% of implants fracture is within a mean loading period\r\nof 8.3 years.
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