There is multiple reasons that a denture anchored on implant is the option other than financial. Mainly the lack of enough bone in the jaw requires an alternative treatment this kind of solution can be ideal especially for the lower jaw. The technicality of anchoring the denture to the implants has become so simple and predictable that financially and medically it is a sound treatment. For the lower jaw, the existing denture can be used to convert to the new placed implants via using the locators. For the maxilla or upper jaw, a new denture should be done to accommodate the minimum four implants needed to snap the denture on them.
In case of extreme bone loss cases were the bone grafting to increase the height especially is unrealistic, the dental implant in use makes a huge difference. I have been involved for the last two years in the launching by ZImmer dental a new generation of dental implants called Trabecular metal implants. These implants will work extremely well in cases like yours. Your treating surgeon should be looking into them.
Usually these fractures are due to a lot of stress on the crown itself. The best approach is to revisit your whole bit design and relieve the tension on the implant.
Lupus issuer tissue related condition as you are well aware of it. If you are on regular plaquinil, you should be fine, but since you c reactive is a bit high, it would be wiser to start me drool pack two days before and continue it after. the best is to ask your treating implant surgical dentist to consult with your physician. All the best
since your tooth have been lost, the teeth around and above have shifted, since the teeth need the opposing and adjacent teeth. in order to have an adequate bite for you and for the future implant, it will be wiser to straighten your teeth. the benefit for you is not only aesthetic but alos functional which it will help to relax the strain of your muscles due to a shifted bite. i recommend orthodontic first followed by dental implants.