As someone who has been engaged in dental care in Xiamen for many years, I have a certain understanding of Xiamen’s orthodontic technology and services. Below I will answer your questions in the first person voice for your reference.

As for the question of which is the best place for orthodontic treatment in Xiamen, I think there are many aspects that need to be considered when choosing a good orthodontic medical institution. You need to choose a formal and professional dental medical institution with corresponding medical qualifications and experience. You need to choose an experienced doctor with professional skills and a good reputation. In the Xiamen area, there are several dental medical institutions and private dental clinics that provide orthodontic services. The more well-known ones include large medical institutions such as the Stomatological Hospital Affiliated to Xiamen University School of Medicine and Xiamen Stomatological Hospital, as well as some private dental clinics. These institutions and doctors usually have rich clinical experience and professional skills, and can provide personalized orthodontic solutions and considerate services.

As for whether additional charges are required for later retainers, it depends on different medical institutions and doctors. Generally speaking, the cost of retainers is not included in the cost of braces and requires the patient to pay additionally. However, some medical institutions and doctors may offer free or discounted retainer services to attract more patients. Therefore, when choosing a medical institution and doctor, it is recommended to ask in advance whether you need to pay extra for retainers so that you can prepare your budget.

In short, choosing a good orthodontic medical institution requires considering many aspects, including the qualifications of the medical institution, the doctor's experience, equipment and technology, service quality, etc. At the same time, you need to understand the cost of retainers so that you can prepare your budget. Hope the above information can be helpful to you. If you have any other questions or need to know more about Xiamen’s orthodontic treatment, please feel free to consult me.