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We analysed the ability of osteointegration of Trabecular Metal TM* porous tantalum cylinders when placed in human jaw.(* Trabecular Metal Material TM is a trademark of Zimmer Holdings, Inc.).This clinical study was approved by the institutional review board of the University of Leon,Spain.23 healthy subjects were used.Each of them received one or two cylinders of porous tantalum, 3x5 mm, next to a conventional dental implant in the same surgical time.