Dentists use a standardized numbering system to identify each tooth in the mouth. This system ensures clear communication among dental professionals, accurate record-keeping, and efficient treatment planning. It helps avoid confusion and allows for precise diagnosis.
The Universal Numbering System and Tooth 17
The Universal Numbering System, also known as the “American System,” is widely used in the United States for permanent teeth. This system assigns numbers 1 through 32 to adult teeth. The numbering begins with tooth 1, which is the upper right third molar, and proceeds clockwise around the mouth.
The count continues along the upper teeth to the left side, with tooth 16 being the upper left third molar. From there, the numbering drops down to the lower jaw, starting with tooth 17. Therefore, tooth 17 is identified as the lower left third molar. The numbering then continues across the bottom teeth to the right side, ending with tooth 32, the lower right third molar.
The Nature of Tooth 17
Tooth 17 is commonly known as a “wisdom tooth” or “third molar.” These teeth are typically the last to emerge in the mouth, usually appearing during late adolescence or early adulthood. They are often the final teeth to erupt into the dental arch.
Molars are designed for crushing and grinding food. Historically, third molars were useful for processing coarse diets, but with changes in human diet, their necessity has decreased. Human jaws have also evolved to be smaller, which often leaves insufficient space for these teeth to emerge properly. This limited space contributes to challenges associated with tooth 17.
Common Issues and Management
Tooth 17, like other wisdom teeth, frequently presents problems due to its late eruption and limited jaw space. One common issue is impaction, where the tooth does not fully erupt and remains trapped within the gum tissue or jawbone. An impacted tooth can grow at an awkward angle, pushing against adjacent teeth or the back of the mouth.
This impaction can lead to complications, including pain, swelling, and infection. A common infection is pericoronitis, an inflammation of the gum tissue surrounding a partially erupted tooth, often caused by trapped food particles and bacteria. Impaction can also contribute to tooth decay in the wisdom tooth or the neighboring second molar, as these areas become difficult to clean. Cysts or tumors can form around an impacted tooth, potentially damaging the jawbone. Crowding of other teeth and jaw pain are also concerns.
Management strategies for tooth 17 depend on the specific issues. Initial approaches may include monitoring the tooth, especially if it is not causing symptoms, and managing pain with over-the-counter medications. However, if problems such as persistent pain, recurring infections, damage to adjacent teeth, or cysts develop, surgical extraction is frequently recommended. This procedure involves removing the tooth and any bone that blocks access to its root, and it is often performed as an outpatient procedure. Dental professionals often recommend removing problematic wisdom teeth to prevent future complications and maintain overall oral health.