The most prevalent cause of toothaches is tooth decay, also known as cavities. Poor oral hygiene can lead to the accumulation of plaque, a sticky film of bacteria, on the teeth. Over time, the bacteria produce acids that erode the enamel, causing cavities. As the decay progresses, it reaches the inner layers of the tooth, resulting in pain and sensitivity.Dental bridges presuppose shaving down at least two neighboring teeth even if they're healthy to use as bridge abutments. Sometimes it leads to teeth oversensitivity and might even cause the need for root canal treatments. To sum up, shaving the neighboring teeth shortens their lifetime dramatically.