[Clinical lack of first permanent molars]

Area of Science:

• Dentistry
• Oral and Maxillofacial Surgery
• Pediatric Dentistry

Context:

• Dental impactions are a common clinical concern.
• Understanding classifications aids diagnosis and treatment planning.
• Delayed eruption of permanent teeth requires careful management.

Purpose:

• To present Gysel's 1969 classification of dental inclusions.
• To report three clinical cases of delayed eruption of upper first molars.
• To correlate clinical findings with Gysel's classification.

Summary:

• The study reviews Gysel's 1969 classification system for dental inclusions.
• Three cases involving delayed eruption of permanent upper first molars are presented.
• The cases illustrate the practical application and challenges of classifying these impactions.

Impact:

• Provides a historical perspective on dental impaction classification.
• Offers insights into the management of delayed molar eruption.
• Contributes to the understanding of tooth development anomalies.