Abstract
Background: The esthetic lag in the full coverage restoration of preformed stainless steel crowns led to the
development and use of open-face techniques, pre veneered crowns, and zirconia crowns. Fibreglass crowns (Figaro Crowns,
Inc.; USA) were recently introduced which required lesser crown reduction when compared to Zirconia crowns and also
satisfied the esthetic needs. The periodontal health at the vicinity is still unaddressed. Aim: To evaluate the periodontal
health status of primary molars restored with PSSCs and Figaro crowns. Materials and Methods: This split mouth
randomised clinical trial involved 25 children requiring bilateral pulp therapy in primary mandibular second molars between
6-9 years of age. Following pulp therapy, the teeth were randomly allocated into either NuSmile ZR or Figaro crown group.
A single operator performed the treatment procedures for all the children to avoid operator variability. The children were
recalled at 3, 6, 9 and 12 month intervals for assessment of periodontium. A research scholar who was not involved in the
treatment procedure performed the periodontal assessments in the followup visits. Plaque accumulation was recorded using
the Loe and Sillness Index. The collected data were subjected to statistical analysis. Results: At 3 months, 6 months, 9
months and 12 months follow ups, the mean PI scores and mean GI scores of the participants for Zirconia crowns were
slightly lower than Figaro crowns but had statistically significance. (p>0.05). Conclusion: Within the limitations of the
present study, both Zirconia crowns and Figaro crowns had reasonable amounts of plaque accumulation scores during the 12
month periodical follow ups