Diagnosis: Clinical manifestation, X-ray, CTscans Treatment: Reduction after 7--10d post-wound Operation approach: via infraorbit, via maxillary sinus and external ethmoidectomyDiagnosis： Clinical manifestation, X-ray, CT scans Treatment： Reduction after 7—10d post-wound. Operation approach: via infraorbit, via maxillary sinus and external ethmoidectomy