Posts for: October, 2018
About one-quarter of people have teeth that never developed. While most of these congenitally missing teeth are wisdom teeth, they can also include premolars or lateral incisors (the teeth right next to the two front teeth, the central incisors).
Missing teeth can have an adverse effect on smile appearance. But that’s not all: because each type of tooth performs a specific function, one or more missing teeth can lead to bite problems and disruption of dental function. In the case of missing lateral incisors, the canines (eye teeth) normally positioned beside and toward the back of the mouth from them may begin to drift into the empty space and grow next to the central incisors. This can result in greater difficulty chewing and a smile that “doesn’t look right.”
To correct this situation, we must often first attempt to orthodontically move any out of place teeth to their normal positions. This re-establishes the space needed for the missing teeth to be replaced, which we can then restore with prosthetic (artificial) teeth. If the permanent restoration of choice involves dental implants, we’ll usually need to wait until the completion of jaw development around early adulthood. In the mean time, we can use a retainer appliance to hold the teeth in their new positions with prosthetic teeth attached to fill the empty space for a better smile appearance in the interim.
The real issue is timing—beginning orthodontic treatment when appropriate to a person’s oral development, as well as completing the implant restoration when the mouth has matured sufficiently. There are other considerations such as bone volume, which may have diminished due to the missing teeth. At some point we may need to consider grafting to build up the bone sufficiently to support dental implants.
This all may entail a team approach by various specialties like orthodontics, periodontics and implantology. Working together and coordinating within a timely schedule, a mouth and smile marred by undeveloped teeth can be transformed.
If you would like more information on treating smiles with underdeveloped permanent teeth, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “When Permanent Teeth Don’t Grow.”
Braces can be a long, involved process, but gaining a more attractive smile and better oral health is worth it. Sometimes, though, braces can produce unintended short-term consequences.
Brace brackets and wires do the work of moving teeth to better positions. They can, however, hinder the wearer's hygiene efforts to remove plaque, a thin film of bacteria and food particles, from tooth surfaces. Plaque buildup increases the risk of dental disease and other ill effects.
One such effect while you're wearing braces is the formation of tiny spots that look pale and chalky on otherwise smooth and polished enamel. These are white spot lesions (WSLs), where acid has remained for too long on the tooth enamel. They occur because acid-producing bacteria escape removal during brushing and flossing due to the braces hardware.
We want to try to prevent WSLs while wearing braces, and not just because they're unattractive. You're actually looking at enamel erosion, which could lead to cavity development at those weakened spots.
Although difficult for you as a braces wearer, daily brushing and flossing is crucial to WSL prevention. You'll need to take more time to be sure you're reaching all around the wires and brackets. You can improve your effectiveness with special brushes for braces and floss threaders or water irrigators. You can also help keep acid levels low by cutting back on acidic foods and beverages, especially sodas, coffee or spicy foods.
Even if you develop WSLs we can treat them effectively, especially if caught early. One way is by aiding enamel re-mineralization through saliva stimulation (the mouth's acid neutralizer) or applying fluoride to the teeth to strengthen enamel. We can also use caries infiltration, a technique that injects tooth-colored resin below the surface of the lesion. This strengthens the weakened enamel and gives the area the appearance of translucence like normal enamel.
While you're wearing braces, focus diligently on keeping your teeth clean of plaque and keep up your regular cleaning visits with us. If you notice any unusual discolorations or abnormalities, see us as soon as possible. Stopping WSLs from developing will help ensure your teeth are healthy and attractive after the braces come off.
If you would like more information on dental care with braces, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “White Spots on Teeth during Orthodontic Treatment.”
Orthodontics can produce an amazing smile transformation. With today’s advanced appliances and techniques even the most difficult malocclusions (bad bites) can be overcome. All of this innovation, however, depends on one basic anatomical fact: though firmly set in the mouth, our teeth can still move.
Teeth are actually held in place by the periodontal ligament, a strong, elastic tissue that attaches to them through tiny collagen fibers on one side of the ligament and to the jawbone with similar fibers on the other side. When pressure is placed against a tooth, the bone on the opposite side of the force begins to dissolve (resorb), allowing the tooth to move. As it moves, new bone is built up behind the tooth, to stabilize it. Orthodontists take advantage of this natural mechanism through orthodontic hardware like braces that applies pressure in the desired direction of movement, while the ligament and bone do the rest.
There is, though, a downside to this process. The teeth, bone and gum tissues can contain a kind of “memory” for the former natural position of the teeth. Over time, the lower front teeth tend to take a gradual migratory movement back towards their original position. Also, as we age the lower front teeth may crowd each other as there is a genetic influence for teeth to move to the midline of the face, causing a pressure that allows the skinny lower front teeth to slip behind each other. As a result of both of these tendencies, corrected teeth may retreat from their new positions.
To stop these tendencies, we use an appliance known as a retainer after braces or other hardware is removed. As the name implies, this appliance “retains” the teeth in their new position. For structural “memory,” the retainer will keep the teeth in their new position until the impulse to return to the old one has faded, about eighteen months. Retainers can also slow or stop the natural genetic influence of movement, but it may mean wearing a retainer for an indefinite period, especially individuals who’ve undergone orthodontic treatment later in life.
The length of time you’ll need to wear a retainer after braces — and what type, whether a removable appliance or one permanently attached — will depend on a number of factors including the type of malocclusion, your individual mouth structure and age. We’ll recommend the best option that ensures the best chance of keeping your teeth in their new position.
If you would like more information on retainers after orthodontic treatment, please contact us or schedule an appointment for a consultation. You can also learn more about this topic by reading the Dear Doctor magazine article “Why Orthodontic Retainers?”