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[Reduction laryngoplasty by external approach for glottic incompetence. Current role, demonstration of its efficacy by objective analysis of parameters of vocal quality].

Authors talk about the place of surgical treatments with cervicotomy in abducted vocal cord, about the statistics of the department of Phoniatrics of the Hospital Edouard Herriot in Lyon. These techniques have actually a marginal place. But the analysis of a recent case shows us that endoscopic treatment for vocal fold augmentation with biomaterials such as collagen or teflon can fail. So ENT surgeons have to absolutely know the Guerrier's technique to improve the quality of the voice when injectable biomaterials fail. With the description of this case, we will describe the objective analysis methods of the voice parameters that we use in the department.