Prospective randomized clinical trial of primary molar crowns: 24-month results

Kevin J Donly, Issa Sasa, Claudia I Contreras, Maria-jose Cervantes

Research output: Contribution to journalArticle

2 Scopus citations


Purpose: The purpose of this study was to evaluate the clinical success of a new primary zirconia molar crown compared with stainless steel crowns (SSCs). Methods: This randomized, controlled clinical trial was designed as a split-mouth study. Fifty three- to seven-year-old children were recruited to provide a total of 50 pairs of teeth requiring primary molar crowns, with each participant receiving a SSC and zirconia crown. Restorations were evaluated at six-month, 12-month, and 24-month recall appointments examining the following criteria: gingival health; estimate of extent the crown was high in occlusion; surface roughness; staining on crown surface; wear of opposing arch tooth; color match; anatomic form; marginal integrity; marginal discoloration; proximal contact area; secondary caries at crown margin; and parent/guardian satisfaction with crown appearance. Results: The 24-month follow-up included 39 patients (78 percent). Seventy crowns (70 percent) were evaluated; of the 36 zirconia crowns and 34 SSCs, there were no failures at the 24-month evaluation. The only significant difference in the parameters evaluated was in parental satisfaction with the zirconia crown preference (P<0.05). Conclusion: Current 24-month results indicate that zirconia primary molar crowns perform similarly to an established stainless steel crown for restoration of primary molar teeth.

Original languageEnglish (US)
Pages (from-to)253-258
Number of pages6
JournalPediatric Dentistry
Issue number4
StatePublished - Jul 1 2018


  • Crowns
  • Stainless steel
  • Zirconia

ASJC Scopus subject areas

  • Dentistry(all)

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    Donly, K. J., Sasa, I., Contreras, C. I., & Cervantes, M. (2018). Prospective randomized clinical trial of primary molar crowns: 24-month results. Pediatric Dentistry, 40(4), 253-258.