Single Sided Deafness

The goal of this clinical trial is to investigate the safety and effectiveness of cochlear implantation in infants and toddlers with single-sided deafness. The main questions it aims to answer are: * Are cochlear implants an effective treatment of single-sided deafness in infants and toddlers? * Are cochlear implants a safe treatment for single-sided deafness in infants and toddlers? Participants will receive a cochlear implant and be followed until they are five years old. During those five years, the investigators will program the device and monitor auditory development. Children will be asked to: * Undergo cochlear implantation * Wear their cochlear implant processor whenever they are awake. * Participate in traditional hearing tests * Participate in traditional hearing testing * Participate in localization testing * Participate in hearing in noise testing * Participate in word recognition testing * Participate in speech, language, and educational evaluations The researchers will compare results to children with typical hearing in both ears and children with single-sided deafness who have not received an implant to observe any differences between the groups.

This study is performed to collect safety and performance data supporting the use of the Sentio system in children below 12 years of age. The system is currently available on the market for patients 12 years and above. It is a prospective study conducted at eight European hospitals, aiming to treat 50 patients with a hearing loss than would benefit from treatment with a bone-anchored hearing system (BAHS). The primary objective of the study is to demonstrate that the Sentio system improves the hearing on the implanted ear, compared with the unaided situation.

The study is designed as an international, multi-center, single-armed, non-interventional/observational study including subjects who has received or are planned to receive the Sentio system as part of normal clinical practice.