An overdenture is similar to a conventional denture except it has precision dental attachments underneath that give it much better retention. Overdentures can be made to fit over implants or in some cases over natural teeth. It is a way of providing extra stability for dentures so that they behave much in the same way as natural teeth, and patients can be confident that they won’t move around or fall out, alleviating the need to use messy adhesives. It’s an ideal solution for anyone who has a lot of trouble keeping dentures in place due to lack of retention, and the overdentures can be removed for easy cleaning. The most secure way of supporting an overdenture is using implants, and a full denture can be made to have separate attachments or a bar attachment underneath which will lock onto implants attachments in the jaw and feel completely secure. A full denture will need to have several implants to lock onto, with more implants being required in the upper jaw as the bone is softer. Having an overdenture made to fit over implants may seem quite expensive but the results are extremely good. It is considerably less expensive than having a bridge made to fit over implants to replace a full arch of missing teeth. The life of an overdenture and the implants can depend on several factors, but implants can last a lifetime with current studies showing them lasting 20 years or more. Factors which may affect the life of implants include general oral hygiene habits, overall health and other habits such as teeth grinding and smoking. It’s possible that parts of the implant may have to be replaced periodically due to wear and tear or deterioration. It also depends as to whether the overdenture is for the upper or lower jaw, and how many implants it is supported by.