Should I Have Large Gaps Between my 4 in 1 Dental Implants and the Gum Line?

Depending on your bone/tissue level, the abutments that hold the prostheses in your mouth will be noticeable if you pull your lip up. The purpose of having visible abutments is for optimal hygiene purposes. You MUST be able to pass the bridge floss underneath the prosthetic in order to keep plaque and tartar from building up around your abutments and on the underside of the bridge. 

Large Gaps Between All On 4 Dental Implant Prosthesis and the Gum Line?If the spacing has been present since time of initial placement, then you should point this out to your dentist so that they can correct it.If, however, you've noticed that the space has been getting larger, then it is important that you return to your dentist so that the cause can be determined.I hope you found this info to be helpful,Dr Champagne

Some gaps are okay as they help you to clean the area with floss or WaterPik. How long have you had your dental implants? If you are still wearing a temporary set of teeth the gaps may be larger until your permanent set is fitted and placed. Otherwise, if it has been some time you may have experienced some shrinkage in the bone and/or surrounding tissue. If it is bothering you, discuss this with your surgeon. They can usually help make the fit a little more snug and comfortable for you. 

The old method of making these appliances was to leave a gap in between the gums and the appliance for the lower jaw. This allows the patient to keep it very clean. There is really nothing wrong with this design unless the patient does not like it for some reason. 
For the upper jaw, there should not be any gap because this will lead to a "lisp" when speaking. 

If you've recently had extractions and your All-on-Four prostheses delivered, it is not surprising to have a gap between the gums and the acrylic. As healing takes place, the bone and gums will shrink and stabilize and often create a gap that is usually closed at the time of making the final restoration.If the hybrids are recent, it is fairly common to have a "high water" design on the lower prosthesis to aid in keeping it clean. We try to have a fairly intimate fit to the gums on the top to prevent saliva, food, and water from passing over the top during speech and eating. If you've had the restorations for a while, then you may have had further bone loss and recession that has caused the gap to widen. This is worth discussing with your dentist. Depending on the material, you can likely have that area relined to fit more perfectly. If you feel the implant, it may actually be a component of the restoration (called a multi-unit abutment) that sticks out of the implant and the denture rests on. If it's the implant itself, the dentist should closely monitor it to make sure that implant stays healthy.