Is eMax good for 4 unit bridge work for front teeth?

An eMax bridge is not without risk. There is a limit to the span of a bridge, and number of supporting teeth are a factor.  Absence of metal makes for a beautiful restoration, but it is not as strong so breakage/fracture can happen.  In the case of a bridge, the bridge can break or the stress on the supporting teeth can lead to breakage of the teeth and not the bridge.  Accurate impressions can help distribute load better as well, leading to longer lasting restorations (including bridges).eMax can be "monolithic" or a single material, but this is not as pretty compared to layering other shades of porcelain to match the colors of the adjacent teeth.  The beauty will depend on the artist, the ceramist in the lab creating the bridge.  Not all labs are the same, just as not all dentists are the same.So, the answer.  CAN eMax be used as a four unit bridge in the front?  Yes.  SHOULD you?  I have no idea.

There is more to this question than a simple yes or no answer. The span of the bridge and the bite of the patient all play a role in the material choice for bridges. Also, all porcelain bridges may require the patient to change personal habits. Ask your dentist which choice is the best for your situation.