About this trial
Compare two band and loop space maintainers made from two tooth colored materials; Polyetherethherketone (PEEK) and monolithic Zirconia (BruxZir) as regards to:
* Clinical performance of space maintainers in terms of frequency of debonding or fracture of the appliance and health of adjacent gingiva during a one-year follow up. * Wear of the opposing teeth.
Eligibility criteria
Qualifiers
Children requiring bilateral extraction of mandibular first primary molars or those with previously extracted molars no more than 6 months prior to intervention (11) .
Existence of teeth on the mesial and distal side of edentulous area.
Angle's Class I molar relationship and/or flush terminal/mesial step primary molar occlusion
No periapical and/ or furcural pathological condition related to abutment teeth.
Disqualifiers
Carious abutment teeth requiring pulp therapy.
Carious abutment primary teeth requiring a full coverage restoration.
Patients with history of bruxism or/and clenching.
Patients with medical, intellectual or physical disabilities.
Trial design
Treatments tested in this trial
- aesthetic functional space maintainers