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Custom-made Zirconia Crowns Versus Prefabricated Zirconia Crowns in Young Permanent Molars

9. juli 2026 opdateret af: Jordan University of Science and Technology

Custom-made Zirconia Crowns Versus Prefabricated Zirconia Crowns in Young Permanent Molars: A Randomised Controlled Trial

This study aims to compare the clinical performance of Prefabricated Zirconia Crowns (PZCs) with that of Custom-made Zirconia Crowns (CZCs) using enhanced clinical protocols.

Studieoversigt

Status

Tilmelding efter invitation

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

Young permanent molars presenting with gross caries, pulpal treatment or developmental defects often require full coverage restorations. Recently, the Prefabricated Zirconia Crowns (PZCs) have been introduced as a biocompatible and an aesthetically pleasant option with promising outcomes. However, it comes in specific sizes, limited shades and a significant tooth preparation is often required. Custom-made zirconia crowns (CZCs), fabricated using CAD/CAM technology may; offer a favorable aesthetic alternative by ensuring a controlled tooth reduction, precise fit, better aesthetics, and improved retention. Nevertheless, the current evidence concerning its use in young permanent molars remains limited. This study will be a randomised clinical trial that aims to compare the clinical performance of (PZCs) with that of (CZCs) for the restoration of badly carious/destructed young permanent molars in children aged 7-13. Patients will be randomised into two treatment groups using an online block randomisation technique (block size of 6) and sealed-envelope techniques. Clinical parameters: retention, fracture, gingival health and marginal integrity will be evaluated at 3-month, 6-month, and 12-month intervals. In addition, treatment duration, intraoperative patient comfort and immediate postoperative patient satisfaction will be evaluated and compared. The findings of this study are expected to provide evidence on the suitability of CZC for young permanent molars in children. The Null hypothesis is that there is no difference between the two types of crowns in terms of clinical performance and child acceptance.

Undersøgelsestype

Interventionel

Tilmelding (Anslået)

50

Fase

  • Ikke anvendelig

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiesteder

  • Jordan
      • Irbid, Jordan
        • Jordan University of Science and Technology

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Medically fit or with mild systemic illness (ASA I or II).
  • Children who assent to take part in the study with a valid parental consent
  • Children who have at least one first permanent molar requiring a full-coverage restoration (indications for placing a crown include: badly destructed/carious molars, or teeth affected by molar-incisor hypomineralisation (MIH))
  • Maxillary or mandibular fully erupted first permanent molars, regardless of the stage of root development.
  • A cooperative child that accepts dental treatment (Frankle Behaviour Rating Scale #3 or 4).
  • Capable of attending all follow-up sessions.

Exclusion Criteria:

  • Patients outside the required age range
  • Parents/child not willing to participate.
  • Medically compromised patients
  • Partially erupted permanent first molars.
  • Patients with severe malocclusion that prohibits the provision of crowns
  • First permanent molars are not indicated for full coverage restorations.
  • First permanent molars are indicated for extraction.
  • Patients with bruxism or parafunctional habits.
  • Uncooperative children (Frankle Behaviour Rating Scale #1 or 2)

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

  • Primært formål: Behandling
  • Tildeling: Randomiseret
  • Interventionel model: Parallel tildeling
  • Maskning: Enkelt

Våben og indgreb

Deltagergruppe / Arm
Intervention / Behandling
Eksperimentel: Prefabricated Zirconia Crowns
Tooth preparation and cementation of a suitable size of prefabricated Zirconia crown.
Procedure: Prefabricated Zirconia Crown
Tooth preparation as per the manufacturer's instructions and cementation of a suitable size of prefabricated Zirconia crown using self-adhesive resin cement.
Eksperimentel: Custom-made Zirconia Crowns
Tooth preparation, followed by oral scanning and production and cementation of a zirconia crown using CAD-CAM technology.
Procedure: Custom-made Zirconia Crowns
Tooth preparation (1-1.5 mm occlusal, 0.5 to 1.25 mm circumferential, with a shoulder-edge supra-gingival margin), followed by scanning with an intra-oral scanner, then temporisation. A zirconia crown will be produced using CAD-CAM technology and cemented with a self-adhesive resin cement on a different visit.

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Rate of Crown retention
Tidsramme: 3,6 and 12 months
Visual-tactile evaluation of the crown retention over time (crown present, loose or lost).
3,6 and 12 months
Rate of chipping and fracture of the crown
Tidsramme: 3,6 and 12 months
Clinical evaluation for the presence/absence of crown chipping or fracture
3,6 and 12 months
Gingival health
Tidsramme: 3,6 and 12 months
Clinical evaluation of the gingival inflammation ( the gingival index (GI) by Löe & Silness 1963 )
3,6 and 12 months
Clinical crown margin extension
Tidsramme: 3,6 and 12 months
Visual-tactile evaluation for crown margin extension (supra/ equi/sub-- gingival)
3,6 and 12 months
Radiographic crown margin adaptation
Tidsramme: 6 and 12 months
Evaluation of crown margin adaptation (Geduk et al., 2023)
6 and 12 months
Clinical crown margin adaptation
Tidsramme: 3,6 and 12 months
Clinical evaluation of crown margin using an explorer (Geduk et al., 2023)
3,6 and 12 months

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Time taken for intervention
Tidsramme: Perioperative/Periprocedural: from the beginning of tooth preparation and until the crown is cemented.
Total time taken to perform the intervention for each crown (crown preparation, try-in and cementation) in minutes.
Perioperative/Periprocedural: from the beginning of tooth preparation and until the crown is cemented.
Patient satisfaction
Tidsramme: immediately following intervention.
Self-reported child acceptance using a 5-points visual analogue scale
immediately following intervention.
Patient's comfort
Tidsramme: peri-operatively
will be evaluated by an observer (research assistant who will be trained, and calibrated) and recorded using the Sound, Eyes, and motor scale (SEM); Based on the intensity of the child's discomfort, each parameter is scored into one of four categories (comfort (score 0), mild discomfort (score 1), moderately painful (score 2), and painful (score 3)). The total score can range from 0 to 9, with 9 indicating the highest level of discomfort.
peri-operatively

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Jordan University of Science and Technology

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

1. august 2025

Primær færdiggørelse (Anslået)

31. december 2027

Studieafslutning (Anslået)

31. december 2027

Datoer for studieregistrering

Først indsendt

25. marts 2026

Først indsendt, der opfyldte QC-kriterier

9. juli 2026

Først opslået (Faktiske)

15. juli 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

15. juli 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

9. juli 2026

Sidst verificeret

1. juli 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Andre undersøgelses-id-numre

  • 245-2025

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

UBESLUTET

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ingen

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Kliniske forsøg med Zirconia kroner

Kliniske forsøg med Prefabricated Zirconia Crown

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Sponsorer og samarbejdspartnere

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Narkotikainterventioner

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CROs in Mongolia

Betingelser

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Kosttilskud

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Placeringer

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