The question "What has the longest crown?" is a bit broad, so let's refine it to "Which human tooth has the longest crown?"
Based on the provided reference, unworn central incisors have the longest crown.
Understanding Tooth Crown Length
The crown of a tooth is the visible part above the gum line. The length of a tooth crown can vary due to several factors, including:
- Tooth Type: Different types of teeth (incisors, canines, premolars, molars) have different average crown lengths.
- Wear: Over time, the crown of a tooth can wear down, reducing its length.
- Individual Variation: There can be slight variations in tooth crown length from person to person.
Crown Length Ranking
Here's a table summarizing the crown lengths of different teeth as per the reference:
| Tooth Type | Condition | Average Crown Length (mm) |
|---|---|---|
| Central Incisors | Unworn | 11.69 |
| Canines | Unworn | 10.83 |
| Central Incisors | Worn | 10.67 |
| Canines | Worn | 9.90 |
| Lateral Incisors | Worn/Unworn | 9.34-9.55 |
| Premolars | Worn/Unworn | 9.33 |
- Key Insight: Unworn teeth consistently have longer crowns than their worn counterparts. Central incisors, when unworn, boast the longest crown.
Conclusion
In summary, among human teeth, unworn central incisors possess the longest crown. This is followed by unworn canines, worn central incisors, and other types of teeth.
