To study the effectiveness of unilateral cochlear implantation (UCI), binaural-bimodal hearing (BIM), and bilateral cochlear implantation (BCI) children; and to explore the effect of inner ear malformation children. 261 patients who received the cochlear implantation (CI) were selected (UCI, BIM, and BCI). 24 months after surgery, we tested the aided sound-field thresholds. Besides, we conducted questionnaires including meaningful auditory integration scale (MAIS) and infant-toddler meaningful auditory integration scale (IT-MAIS), meaningful use of speech scale (MUSS), categories of auditory performance (CAP), and speech intelligibility rating (SIR). Then, they were sub-divided into inner ear malformation group and control group, respectively. The aided sound-field thresholds were better in BCI than in UCI and BIM, with a statistically significant difference. No significant difference was found in MAIS/ IT-MAIS, and CAP scores among three groups. BIM outperformed UCI on both MUSS scores and SIR scores. There was almost no statistical difference between the two subgroups. Children with BCI have the best performance of auditory awareness in quiet environment. Children with BIM have better control of their voices and better verbal skills in everyday life than children with UCI, and that people are more likely to understand what they are expressing. Children with inner ear malformations also benefit from CI. 

Hui Jia is from the Department of Otorhinolaryngology Head and Neck Surgery, the Second Hospital of Lanzhou University, Gansu Province. She is currently a doctoral candidate, and her supervisor is Professor Guo Yufen. Her research interests include basic and clinical otology. As the first author, he has published 2 SCI papers and 3 CSCD papers.