One implant on lower jaw has no healing cap as well, are the healing caps critical for the healing?

healing caps are usually placed if the implants are exposed and not burried under the gumIf you had healing caps placed and they fell out, see your surgeon. They could be put back on before the gum covers the implant Some of your implants could have been left covered under your gum, for better healing , if bone grafted at the same time. If this is the case , they will be exposed 4-6 months post healing, healing caps will be put on at that timeHave the sites evaluated by your surgeon. To make sure....

Obviously if the healing caps were initially placed, they do serve a purpose. Without the healing cpas inplace, the implant is exposed to the environment, thereby running the risk of conamination or damage fro food stuffs during chewing.During the healing process the tissue will grow over the exposed implant if a healing cap isd not in place. Many times we place a specific healing cap in order to achieve an ideal tissue contour when the time arrives to take an impression to place a tooth (crwon restoration).
If the tissue has grown over the site we most likey will need to use a laser to access the implant for our impressions. This may necessiate a waiting period and delay your receiving a tooth in this area. It is imperative that you contact the Dr that placed the implant and seek their help with this issue.

Having 8 extractions, and 9 implants, I don't understand why you are not asking your Oral Surgeon this question!!!