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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 21 (2006), No. 3     15. May 2006
Int J Oral Maxillofac Implants 21 (2006), No. 3  (15.05.2006)

Page 450-454, PubMed:16796290

Bone Height Measurements Around a Dental Implant After a 6-month Space Flight: A Case Report
Haigneré, Claire / Jonas, Pierre / Khayat, Philippe G. / Girot, Gérard
Purpose: In space, astronauts are subject to microgravity, which reduces skeletal loading and osteoblast function and can cause bone resorption and a decrease in bone density. No known research to date has studied the effect of microgravity on dental implants. This study evaluated peri-implant bone changes around a dental implant placed in a French astronaut who spent 6 months in Russia's Mir Space Station.
Materials and Methods: Measurements were performed by 2 examiners before the flight (baseline), after the flight (stage 1), and following a recovery period (stage 2). Standardized periapical radiographs were taken, and data were recorded using a photomicroscope and a measuring scale.
Results: Cumulatively, the implant sustained 0.43 mm of mesial bone gain and 0.31 mm of distal bone loss.
Discussion: The observed peri-implant bone height changes were within normal limits and the implant appeared very stable during the course of this study.
Conclusion: Peri-implant bone levels remained stable after 6 months in microgravity, and the implant continued to function without complications. (Case Report)

Keywords: dental implants, microgravity, peri-implant bone, space flight