5 disasters of fixed prosthesis
1. Hygiene - Unable to keep cervical line and neighboring gum line clean.
Similar to our natural teeth, fixed conventional prosthesis cannot be removed for brushing. This makes it difficult to keep the cervical line (the dividing line between the crown and the root portion) and surrounding area hygienic. Years of food residue accumulation destroy the remaining tooth, as well as affecting neighboring teeth and bone structure. Often times when dentists think they have done routine hygienic care to their best, their work is actually incomplete due to unseen residue stuck in a narrow deep gap. This is one of a major reason why teeth with fixed prostheses continue to deteriorate resulting in excessive teeth extractions and implants worldwide.
2. Ulcerous deep pocket affecting base of root trunk
Due to the difficulty in cleaning cervical line and adjacent gum line area, years worth of bacteria and toxic residue sink deep into the gums slowly eroding away base of root trunk developing furcation defect. Bacteria and toxins in this enclosed pocket cause a stench and erode away base bone structure rapidly. Soon, these bacteria penetrate blood vessels traveling throughout the entire body causing infections such as meningitis, endocarditis, etc in major organs. At this point, there is very little a periodontal specialists or dentists can do besides cleaning the teeth as best as they can. When facing a problem like this, tooth extraction is only a matter of time. Since too much bone loss compounds the difficulty in bone grafting when implants are considered, most dentists would recommend immediate extraction to avoid further loss of bone and infections of major organs.
3. Fracture - Dental bridge acts like a lever that loosens the crown and breaks the tooth stump
Conventional fixed dental bridge and crown behave similar to prying bottle caps off with a can opener. Biting pressure landing on the fragile tooth simulates bottle cap prying force. Without any means of disseminating biting pressure, a fragile tooth stump succumbs to breakage after a prolonged period.
If a large bottle represents a stable fixed crown, a small bottle represents a loosened fixed crown. The two bottles are connected with a lever representing a fixed cemented dental bridge. When chewing food, with stable fixed crown standing still, the loosened crown is pushed downward with every bite. The lever (dental bridge) transfers the force and pries the other end loose (where the stable fixed crown is). Loose crowns allow food debris to get in and cause destruction of the remaining tooth stump and periodontal disease in the long run.
4. Crown loosens - Dental crown loosens causing food debris to penetrate
Conventional fixed dental bridge and crown behave similar to prying bottle caps off with a can opener. The crown loosens due to torque force of a lever. Loosened crown allows food debris to penetrate through destroying tooth stump inside causing inevitable extractions. Neighboring teeth may be affected requiring another restoration. And the cycle repeats for every new affected tooth.
5. Food debris pack in gaps around gum line - Ulcerous pocket
It is very easy for gums of adjacent conventional fixed crown to become inflamed and develop ulcers especially between the first and second mandibular molars. This is due to food debris along with bacteria seeping into the gum line forming an ulcerous sore. Destruction of bone structure is an inevitable result.