Premature Loss of Primary MolarsSpace MaintenanceDental Arch DevelopmentPediatric Tooth Extraction
Study summary
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.
Eligibility
Sex
ALL
Min age
3 Years
Max age
66 Months
Healthy volunteers
Accepted
Inclusion Criteria:
* 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
* Presence of primary canines and second primary molars
* No space maintainers placed
* Parents/caregivers unable or unwilling to fabricate a space maintainer
Exclusion Criteria:
* 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
* Children who already have space maintainers
* Uncooperative behavior preventing study participation
Primary outcome measure(s)
Change in D Space (Mandibular Arch) — Baseline (Day of Extraction) and 6 Months Post-Extraction The change in D space (distance between the mesial midpoint of the second primary molar and the distal midpoint of the primary canine) on the extraction side of the mandibular arch. Measured in millimeters using 3D digital models.
This page summarises publicly available registry data for informational purposes — not medical advice. Eligibility is determined by each study team; patients should discuss participation with their clinician.
We use cookies to analyse site traffic and improve your experience. With your consent, we may also use cookies for advertising. You can change your choice at any time.