Purpose: Evaluation of survival rate for three space maintainers (SMs) of different designs versus standard one. Methods: 52 extraction sites in children of age group of 4-7 years with prematurely-lost 1st primary molar were selected for this study. The whole sample was divided into four groups (13 each). In Group I, Band and loop (B\&L), Group II: Single-sided band and loop (Ss B\&L), Group III: Direct bonded wire (DBW), Group IV: Tube and loop (T\&L). children were recalled at 3, 6, 9, 12,15-month.
Purpose: Evaluation of survival rate for three space maintainers (SMs) of different designs versus standard one. Methods: 52 extraction sites in children of age group of 4-7 years with prematurely-lost 1st primary molar were selected for this study. The whole sample was divided into four groups (13 each). In Group I, Band and loop (B\&L), Group II: Single-sided band and loop (Ss B\&L), Group III: Direct bonded wire (DBW), Group IV: Tube and loop (T\&L). children were recalled at 3, 6, 9, 12,15-month. Cumulative survival rates of SMs were estimated by means of Kaplan-Meier method with log rank test. Cumulative survival rates of SMs were estimated by means of Kaplan-Meier method with log rank test. Sample size: The total sample size was calculated using Sampsize application with anticipated success on treatment with conventional band and loop 86% , anticipated response on treatment with direct bonded wire 33% 12, at 80% power, and significant level 0.05.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
52
Appliance bonded with composite resin or/banded and cemented with glass ionomer cement
Department of Pediatric Dentistry, Mansoura University
Al Mansurah, Dakahleya Governorate, Egypt
Median survival rate
Cumulative survival rates of space maintainers were estimated by means of Kaplan-Meier method with log rank test
Time frame: 15 months
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