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  • Title: Os odontoideum: etiology, diagnosis, and management.
    Author: Dai L, Yuan W, Ni B, Jia L.
    Journal: Surg Neurol; 2000 Feb; 53(2):106-8; discussion 108-9. PubMed ID: 10713186.
    Abstract:
    BACKGROUND: There have been few reports of os odontoideum since the initial description. METHODS: Forty-four patients with os odontoideum treated during the period 1980 through 1996 were reviewed. There were 33 males and 11 females. Their ages ranged from 7 to 56 years, with an average of 24.6 years. Five patients with no symptoms were treated conservatively. Thirty-nine patients underwent operative treatment including nine posterior atlantoaxial fusions and 33 occipitocervical fusions. RESULTS: The patients were followed up for one to 16 years, with an average of 6.5 years. Five patients treated conservatively have remained stable. All 39 treated patients achieved solid arthrodesis. The results were satisfactory. CONCLUSIONS: We conclude that fusion is indicated if atlantoaxial instability or clinical symptoms are significant, and that occipitocervical fusion should be considered in the operative management of os odontoideum if atlantoaxial arthrodesis is impossible.
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