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Randomized Controlled Trial
. 2020 Nov 10;20(1):313.
doi: 10.1186/s12903-020-01305-1.

Comparing zirconia to anterior strip crowns in primary anterior teeth in children: a randomized clinical trial

Sumer M Alaki  1 , Bashaer S Abdulhadi  2 , Medhat A AbdElBaki  1 , Najlaa M Alamoudi  1
Affiliations
Randomized Controlled Trial

Comparing zirconia to anterior strip crowns in primary anterior teeth in children: a randomized clinical trial

Sumer M Alaki et al. BMC Oral Health. .

Abstract

Background: Providing restorations to anterior teeth in children is a challenging task due to the need for high esthetics, strength, and durability. This study was done to compare prefabricated primary zirconia with resin composite strip crowns on primary maxillary central and lateral incisors with regards to gingival health, plaque accumulation, recurrent caries, restoration failure, and opposing teeth wear over a period of 3, 6 and 12 months.

Methods: Children attending the King Abdulaziz University, Faculty of Dentistry (KAUFD) clinics who needed restorations were screened for inclusion criteria. A total of 120 teeth were treated; 60 with zirconia and 60 with strip crowns. Randomization was done by simple random allocation using SPSS software version 20.0 (Armonk, NY; IBM Corp.). A simple descriptive statistic was used for analysis by Wilcoxon Signed-Rank test and Chi-square test. Level of significance was set at (α = 0.05) and level of confidence at (95%). The presented research was registered retrospectively at ClinicalTrials.gov in 6th of August 2017, under registration number NCT03184012.

Results: Zirconia crowns showed significantly less gingival bleeding at the 3- and 6-months follow up periods (p < 0.006, p < 0.001; respectively), less plaque accumulation at all follow up visits (p < 0.001), no restoration failure (p < 0.001), but more wear to opposing teeth (p < 0.02). No significant difference was found between the two crowns with regards to recurrent caries (p < 0.135).

Conclusion: Based on our data we conclude that overtime teeth covered with zirconia crowns show better gingival health and less bleeding, plaque accumulation as well as less loss of material. On the other hand, zirconia can cause more loss of opposing tooth structure.

Keywords: Anterior restorations; Full coverage; Multi-surface dental caries; Primary anterior teeth; Strip crowns; Zirconia crowns.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Anterior zirconia crown’s application technique. a Pre-operative teeth’s picture, b Facial reduction, c Interproximal reduction, d Incisal reduction and completion of caries removal, e Pink-crown try in, f After Cementation
Fig. 2
Fig. 2
Anterior strip crown’s application technique. a Pre-operative teeth’s picture, b Shade selection, c Crown selection prior to tooth preparation, d rubber dam application, e Incisal, facial and lingual tooth reduction using football diamond bur, f Proximal tooth reduction using fine tapered diamond bur. g Cutting the strip crown using Curved Crown Scissor. h Strip crown after cutting. i Hole piercing in the lingual side of the crown using dental probe. j Applying resin composite material (Z100) into the strip crown using composite spatula. k Adaptation of composite material to the sides of the strip crown. l Teeth after application of strip crowns. m Scalpel used to peel off the strip crowns from the teeth after light cure. n Instrument used in the procedure from top: Curved Crown Scissor, dental probe, composite spatula
Fig. 3
Fig. 3
Intra-oral photographs showing the treatment of teeth no. 52, 51, 61, 62 by zirconia crowns (on the left), and teeth no. 52, 51, 61, 62 by Strip crowns (on the right) at different follow up intervals (3 months, 6 months and 12 months)
See this image and copyright information in PMC

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