European Archives of Paediatric Dentistry

, Volume 16, Issue 5, pp 391–396 | Cite as

Clinical success and longevity of band and loop compared to crown and loop space maintainers

  • M. A. QudeimatEmail author
  • I. S. Sasa
Original Scientific Article



To prospectively evaluate the success and survival rates of band and loop (B&L) compared to crown and loop (C&L) space maintainers.


Thirty-six children were divided into two groups (18 B&Ls and 18 C&Ls) matched for gender, age and the extracted tooth. For the study group, all clinical procedures were performed by the same paediatric dentist. Regular follow-up appointments were scheduled at 4–6 months. Comparisons in survival time and variables which might have affected the mean survival time were tested using Log rank and Chi-square tests.


A total of 16 girls and 20 boys (3.4–6.3 years old) were included. The overall failure rate was 53 %. For B&Ls, the failure rate was 83 % compared to 22 % for C&Ls. The main reason for failure of B&Ls was decementation (87 %), while for C&Ls, it was solder breakage (75 %). The mean survival time for B&Ls was 18.8 months, and for C&L, it was 40.4 months (p < 0.001).


The failure rate and mean survival time for C&Ls were clinically and statistically significantly better than those for B&Ls. Depending on the clinical presentation of the abutment tooth and the intended life expectancy of the space maintainer among other factors, it is recommended that, where a space maintainer is indicated in the primary dentition, preference is given to C&L over B&L space maintainers.


Space maintainer Crown and loop Band and loop Longevity 


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Copyright information

© European Academy of Paediatric Dentistry 2015

Authors and Affiliations

  1. 1.Department of Developmental and Preventive Sciences, Faculty of DentistryKuwait UniversityKuwaitKuwait
  2. 2.Department of Developmental DentistryUniversity of Texas Health Science CentreSan AntonioUSA

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