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Volume 21 , Issue 3
May/June 2006

Pages 450–454

Bone Height Measurements Around a Dental Implant After a 6-month Space Flight: A Case Report

Claire Haigneré, DDS / Pierre Jonas, DDS, DSO / Philippe Khayat, DDS, MSD / Gérard Girot, DDS, DSO

PMID: 16796290

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) Int J Oral Maxillofac Implants 2006;21:450–454

Key words: dental implants, microgravity, peri-implant bone, space flight

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