Success of Zirconia and Composite Strip Crowns for Primary Incisors

  • End date
    Jan 1, 2025
  • participants needed
  • sponsor
    Hacettepe University
Updated on 12 September 2021


The purpose of this study is to evaluate and compare the clinical and radiographic performance of zirconia and composite strip crowns bonded on primary incisors


Zirconia and composite strip crowns will be placed on at least two primary incisor teeth, in a split mouth design. A caries-free primary incisor tooth will be used as control. 100 patients will be included in the study. The teeth will be randomized into two groups according to the crown type.

Group 1: Zirconia crown 2: Composite Strip Crown 3: Control tooth. Plaque index, gingival index, crown retention, presence of restoration failure, gingival margin extension, color match of the crowns and pulpal health of the teeth will be clinically evaluated at baseline and 1., 6., 12., 18., 24. months. The restorations will be evaluated radiographically at 6., 12. and 18. months. Intra-oral photos will be taken directly after treatment and at control appointments.

The data will be analysed statistically using Fisher's Exact Test and pearson's chi-square test; and Log-rank and the Kaplan-Meier will be used to estimate survival percentages.

Condition Dental Caries in Children
Treatment Zirconia crown, composite strip crown
Clinical Study IdentifierNCT05034003
SponsorHacettepe University
Last Modified on12 September 2021


Yes No Not Sure

Inclusion Criteria

Patients and parent of the patients who accept to participate and sign the informed consent
Patients who have at least two primary maxillary incisor with caries that require crown restoration
Teeth that have healthy lamina dura and periodontal ligament
Teeth with no mobility and enough root length
Patients that have good cooperation to the procedure

Exclusion Criteria

Patients and parent of the patients who don't accept to participate and sign the informed consent
Teeth that are previously restored
Patients who are uncooperative
Teeth that doesn't have opposing primary incisors
Patients who have bruxism or deep-bite
Teeth that are close to be erupted
Teeth that have vital or non-vital pulp therapy
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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