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3. The long-term efficacy of currently used dental implants: a review and proposed criteria of success;Albrektsson;International Journal of Oral and Maxillofacial Implants,1986
4. Single-tooth restorations supported by osseointegrated implants: results and experiences from a prospective study after 2-3 years;Andersson;International Journal of Oral and Maxillofacial Implants,1995
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