Risks & complications of wearing a dental bridge
Placement of bridges, whether permanent or removable, has permanent consequences
In addition to the numerous risks and side effects applying to most or all conventional (invasive) dental treatment addressed at Drilling & filling teeth: an unwise choice? On risks, damages and dangers, this page lists specific problems relating to the placement and wearing of a dental bridge in your mouth.
One of the most invasive and serious-in-consequences dental treatments in my eyes since in order to bridge a missing tooth, the adjacent possibly perfectly healthy teeth must be reduced (filed down) to mere stubs. So in case you ever wanted to forego the bridge and "go in the buff", you are left not only with one (or more) missing tooth/teeth (your previous gap) but with a gap plus two or more tiny stubs (and which are likely to not survive in the long term due to pulp and other damage they have sustained).
So here is a concise (not necessarily exhaustive) list of "risks and side effects" associated with dental bridge placement.
1 Destruction of large amounts of sound tooth structure
Placing a bridge depends on sacrificing large amounts of sound tooth structure in the teeth serving as the abutments.
2 Damage to the pulp of the abutment teeth
During the preparatory filing down of the abutments, the pulp (nerve) is traumatized/damaged and possibly killed. If the dentist won't take enough time (time is money!) in the process of preparing the bridge's abutments (files them down too fast), the excess heat generated will damage or kill the pulp of the formerly healthy tooth (more details at Drilling & filling teeth: an unwise choice?). A dead pulp of course means a dead tooth (until the day that humankind will have discovered ways of revitalizing defunct tooth pulp). In my personal experience, bridge pillars are literally condemned to death, but according to dentist Dr. Graeme Munro-Hall, "the greater the amount of enamel left behind after a tooth is prepared for a crown or bridge, the greater the chance of survival for that tooth."
3 Insufficient fit and structural issues
A smaller or larger gap between the gums and the artificial tooth (the pontic or "dummy tooth") allows food rests and bacteria to infiltrate. These will settle inside the bridge and cause inflammation as well as secondary caries (unless perhaps the mouth is constantly rinsed with antibacterial solutions). Such a gap can exist from the moment the bridge is placed (due to faulty craftsmanship) or develop gradually (personally I developed a large gap in a bridge placed in my upper jaw, probably due to the gum above the dummy tooth starting to recede).
Incorrectly adjusted masticatory surfaces (fitting surfaces) of the teeth lead to structural stress (malocclusion).
4 Cracks, breaks, chips or warping
The bridge can become unstable, making chewing difficult.
The bridge can warp leading to problems with chewing and talking as well as great pain.
Ceramic bridges can crack or break. A porcelain fracture (a crack developing in the false tooth) will open the gum line leading to pain and infection. Breaking and cracking is particularly likely when chewing hard food items (such as nuts, ice, etc.). In fact, I have seen an express warning to not chew hard food at all when carrying a bridge in one's mouth.
Porcelain or plastic veneers fused to metal bridges can chip off or gradually abrade (wear away), making the tooth look unattractive.
5 Tooth grinding and clenching
are likely to create complications incl. breaking and cracking of the bridge (compare Bruxism and Healing bruxism).
6 Other potential problems with dental bridges
The gums can be injured.
The gums can become diseased, as can the periodontium (tissues surrounding and supporting the teeth which maintain them in the jaw) which can lead to tooth loss.
If a bridge is placed with existing gingivitis, the gingivitis will be exacerbated and abutment teeth will loosen.
7 Bridges in the upper jaw vs. bridges in the lower jaw
Strictly speaking from personal experience, bridges placed in the upper jaw will much more quickly develop "issues" such as slightly receding gums leading to bacterial infiltration and tooth decay on the abutments.
8 Advice for those who wear a bridge and who develop pain
If you develop the slightest (or even more so, a stubborn type of) pain under a bridge (such as after drinking something sweet etc.), rush to the dentist to have the bridge removed. Everything else, i.e. waiting just gives the bacteria time to eat up and into your hapless teeth trapped under the bridge. Whenever I waited to have this done, all that happened was that the respective infected pillar “rotted away” under cover while giving me great pain until it was finally released from its prison (which I had long hesitated to do since I resented paying another small fortune for the work of a few minutes to a dentist). Incidentally, the concomitant root infection in one case was healed by a homeopathic remedy that a spiritual naturopath correctly determined as being right for me by using a biotensor (a “high-tech” pendulum).