Incidence of lower second permanent molar impaction

Area of Science:

• Dentistry
• Orthodontics
• Dental Public Health

Background:

• Lower second molar impaction is a common orthodontic concern.
• Understanding etiological factors is crucial for effective treatment.
• Changes in incidence may reflect evolving dental development or treatment trends.

Purpose of the Study:

• To investigate the incidence of lower second molar impaction over a decade.
• To examine potential causes of impaction, focusing on the role of premature deciduous tooth loss.
• To compare impacted cases with a non-impacted control group.

Main Methods:

• Comparative analysis of orthodontic patient records from 1976 and 1986 (200 patients per sample).
• Case-control study comparing 50 impacted lower second molar cases (bilateral and unilateral) with a non-impacted control group.
• Evaluation of the association between premature deciduous tooth loss and the distribution of dental crowding.

Main Results:

• The study compared the incidence of lower second molar impaction between two distinct patient cohorts.
• Analysis revealed a potential link between premature loss of deciduous teeth and the development of crowding.
• Differences in impaction patterns were observed between cases and controls.

Conclusions:

• The incidence of lower second molar impaction may have specific etiological factors.
• Premature loss of deciduous teeth appears to be a significant factor influencing lower arch crowding and impaction.
• Further research into early dental development and its impact on permanent tooth eruption is warranted.