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Updated: Jun 3, 2026

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Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
Published on: August 22, 2022
Rootless eruption of a mandibular permanent canine
Yehoshua Shapira1, Mladen M Kuftinec
1Department of Orthodontics, Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel. yehoshua.shapira@gmail.com
Summary
A fractured mandible arrested root formation in a 10-year-old boy, causing abnormal, rootless eruption of a permanent canine. This case highlights the dental follicle's crucial role in tooth eruption processes.
Area of Science:
- Dentistry
- Oral Surgery
- Developmental Biology
Background:
- Tooth eruption is a complex biological process critical for oral function.
- The dental follicle plays a vital role in guiding tooth movement and eruption.
- Mandibular fractures can disrupt normal dental development and eruption patterns.
Observation:
- A 10-year-old boy presented with a unique case of rootless eruption of a mandibular permanent canine.
- The eruption anomaly was directly linked to a previous mandibular fracture sustained in a car accident.
- The fracture occurred in the region of the developing canine, impacting root development.
Findings:
- Arrested root formation was observed in the affected mandibular canine due to the traumatic injury.
- The canine exhibited abnormal, rootless eruption, deviating from typical physiological processes.
- This case provides clinical evidence of the dental follicle's essential function in root development and eruption.
Implications:
- Understanding the impact of trauma on tooth development is crucial for pediatric dentistry.
- This case underscores the importance of the dental follicle in preventing eruption disturbances.
- Findings contribute to the knowledge base regarding dental anomalies secondary to maxillofacial trauma.
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In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin and...
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The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or grinding food.
