This prospective split-mouth clinical study aims to evaluate space changes in the mandibular dental arch following premature extraction of the lower first primary molar in children aged 3 to 5.5 years. Using digital 3D models, changes in the D space and mandibular arch perimeter will be measured at baseline and 6 months post-extraction. The goal is to determine whether space maintainers are necessary in the primary dentition stage.
Children aged 3 to 5.5 years
Mandibular first primary molar indicated for extraction due to extensive decay or hopeless prognosis
Contralateral mandibular first primary molar must be intact and free of proximal caries
No eruption of mandibular permanent first molar at the time of enrollment
Bilateral premature loss of mandibular first primary molars
Contralateral mandibular molar has proximal caries or poor prognosis
Children with good prognosis first primary molars (i.e., not needing extraction)
Eruption of the mandibular permanent first molar