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Anterior Zirconia vs. Resin Strip Crowns

NCT03889535 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 59

Last updated 2022-05-05

No results posted yet for this study

Summary

This study is comparing the effectiveness of two different dental crown fillings (resin crowns and zirconia crowns) for primary front teeth (incisors). Both dental crown fillings are currently used by community pediatric dentists. Resin crowns are currently the standard treatment for primary incisors at The Hospital for Sick Children (SickKids). Zirconia crowns are not presently used at SickKids. It is unknown if one type of crown is better than the other type. If the zirconia crowns produce similar or better results in fixing the primary front teeth, then the zirconia crowns may become the new standard of care at SickKids.

Conditions

  • Caries, Dental

Interventions

DEVICE

Resin strip crowns

Technique: I.Select shade of resin-based composite II.Rubber dam isolation III.Select primary incisor celluloid crown form with mesiodistal width similar to the tooth to be restored and trim the selected crown form to fit. IV.Remove decay with slow speed round bur. Perform pulp therapy, if indicated. V.Reduce incisal edge by 1.5 mm VI.Reduce interproximal surfaces by 0.5 to 1.0 mm with feather edge at gingival margin. The interproximal walls should be approximately parallel. VII.Reduce buccal surface by 1.0 mm and lingual surface by 0.5 mm with feather edge at gingival margins. VIII. Round line angles IX.Etch for 15 to 20 seconds, rinse and air dry X. Apply bond and polymerise XI. Fill crown form to 2/3 full with composite resin and seat onto the tooth. Remove excess material with hand instrument. Polymerise. XII. Remove celluloid crown form with scaler XIII. Finish and polish

DEVICE

Zirconia crowns

I.Choose appropriately sized crown based on tooth's dimension; evaluate occlusion. II.Rubber dam isolation. III.Remove decay, perform pulp therapy if indicated. IV.Prep mesial half of incisal edge to complete thickness of 001 donut bur. V.Prep and blend distal half of incisal edge to create uniform incisal reduction. VI. Create chamfer margin at gum line at least half the thickness of bur tip. VII. Taper incisal half lingually to create a thin incisal edge. VIII. Remove cingulum and 0.75-1.25mm of lingual enamel; blend together forming smooth, slightly concave surface extending to tissue. IX. Thin incisal half. X.With 004 flame bur, remove chamfer margin at tissue level. Keep bur parallel to long axis of tooth. Remove chamfer in incremental steps, XI. Extend tip of bur full 2mm subgingivally. While hugging bur axially along root surface, make 3 circumferential passes. XII.Clean tooth and control bleeding. XIII.Cement crown with pure glass ionomer cement

Sponsors & Collaborators

  • The Hospital for Sick Children

    lead OTHER

Principal Investigators

  • Michael J Casas, DDS · The Hospital for Sick Children

Study Design

Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Model
PARALLEL

Eligibility

Min Age
18 Months
Max Age
48 Months
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2019-04-11
Primary Completion
2022-05-01
Completion
2022-05-01

Countries

  • Canada

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT03889535 on ClinicalTrials.gov