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[Treated case with horizontally impacted mandibular first molar caused by submerged primary molar]
K Miyajima1, K Shirakawa, K Tanida
1Department of Orthodontics, School of Dentistry, Aichi-Gakuin University, Nagoya, Japan.
Aichi Gakuin Daigaku Shigakkai Shi
|March 1, 1990
Summary
Early observation of dental arches is crucial. This case highlights how a submerged primary molar can cause horizontal impaction of a mandibular first molar, necessitating orthodontic intervention.
Area of Science:
- Dentistry
- Orthodontics
- Pediatric Dentistry
Background:
- A horizontally impacted mandibular first molar in an 8-year-old boy presented a clinical challenge.
- The impaction occurred beneath a submerged primary molar, suggesting potential ankylosis.
- The patient exhibited an Angle Class II Division 2 malocclusion.
Observation:
- The submerged primary molar was extracted.
- A lingual arch and utility arch were used to upright the impacted mandibular first molar.
- The submerged primary molar was likely ankylosed, leading to the impaction and rotation of the permanent molar.
Findings:
- Successful uprighting of the horizontally impacted mandibular first molar was achieved using orthodontic appliances.
- Ankylosis of the primary molar was identified as the probable cause of the impaction and subsequent root twisting.
- The twisted roots pose a future risk for endodontic complications.
Implications:
- Careful monitoring of dental arches, even during the deciduous dentition stage, is essential for early detection of potential impactions.
- Prompt diagnosis and intervention can prevent complications associated with impacted teeth.
- Understanding the etiology of impactions, such as primary tooth ankylosis, aids in treatment planning.