Tooth Wear: Structural Inadequacies
Upper jaw and lower jaw malalignment where all teeth do not interdigitate evenly will most likely result in worn teeth.
- Temporomandibular joint (TMJ) internal derangements frequently result in an inadequate function of the lower jaw and envelope of motion. This creates uneven and excessive localized or sectional wear.
- cranio-occlusal discrepancies and/or craniofacial issues may cause incorrect rotation of upper jaw which is part of the base of the skull. This results in unevenness and lack of balance of the occlusal-cranial relationship. This will throw off the bite resulting in excessive and unequal wear.
- Postural issues such as rolled shoulder, scoliotic spine, unequal leg length, may result in a skeletal imbalance that may affect the bite negatively, resulting in premature wear.
- lack of posterior support. Missing posterior teeth will result in unbalanced and excessive forces on the rest of the dentition. This results in premature and advances wear of anterior teeth.
- If the bite that has been corrected orthodontically is not in balance with the position of the condyles in the TMJ, shifts in the bite may occur with time. This result in tooth to tooth prematurities and uneven tooth wear.
- Sometimes if the arches are too constricted. (bicuspid extraction cases), they will result in lack of tongue space and/or limited envelope of motion. This may cause one to artificially position the jaw differently to bypass the issues mentioned. Often this results in improper wear and bite.
May result in extrusion or intrusion of teeth, or sectional fracture of mandible or maxilla, or damage to condyles or the ramus, all can affect the interacting relationship of teeth. If a body does not heal correctly or surgical fixation and/or repositioning does not result in proper healing it results in the discrepancies of the bite which lead to unequal wear.
a) there are several habits that can cause uneven wear or premature wear of teeth.
- Biting on a pen or pencil
- pipe smoking
- nail or cuticle biting
- pressing gums with fingernails and
- opening bottle caps with teeth
There are also cultural factors involved that can cause excessive wear of the front teeth such as seed cracking.
b) toothbrush abrasion results from overzealous tooth brushing pressure or by using a hard bristle toothbrush. The frequency of tooth brushing, the abrasiveness of toothpaste used and chemical ingredient of some toothpaste may affect tooth wear directly or indirectly. Nowadays with toothpaste that is aimed to lighten teeth, it’s been noticed that tooth wear rates have increased.
c) chewing Aspirin or chewable vitamin (‘C’) candy various, iron preparations may cause worn teeth also.