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The histologic evaluation of the implant interface with heterograft and allograft materials--an eight-month autopsy report, Part II.

This paper presents post mortem histologic specimens of the implant/osseous tissue interface from a patient who had had simultaneous bilateral maxillary sinus augmentation and root-form implant placement eight months prior. Two implants were observed: One implant was totally submerged in bone and graft material (2E), and other implant (3E) was devoid of bone at the apex. Microscopic examination revealed that a bony interface existed around implant 2E but that implant 3E had minimal bony interface. It is suggested that the minimal bony interface was the result of minor implant movement induced by variations in barometric pressure on the apex of implant 3E, and that eight months would not have been enough healing time prior to loading for this patient.