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Bone Level Changes Using Clear Aligners Compared to Fixed Appliances in Non-Extraction Treatment of Adults

15. juli 2026 opdateret af: Ahmed Mohamed Hesham, Future University in Egypt

Evaluation of Bone Level Changes Using Clear Aligners Compared to Fixed Appliances in Non-extraction Treatment of Adult Patients: A Randomized Clinical Trial

This study compares two common ways of straightening teeth in adults who have mild-to-moderate crowding of the lower front teeth and do not need any teeth removed: clear aligners and traditional fixed braces.

The main aim is to find out whether the two methods differ in how they affect the bone that surrounds the teeth. Using three-dimensional X-ray scans (cone-beam CT) and digital models of the teeth taken before and during treatment, the researchers measure the level and thickness of the bone around the lower front teeth, the tilt (inclination) of the lower front teeth, and how quickly the crowding is corrected.

Adults are randomly assigned to receive either clear aligners or fixed braces, and the same measurements are compared between the two groups over about six months.

Studieoversigt

Status

Afsluttet

Betingelser

Intervention / Behandling

Undersøgelsestype

Interventionel

Tilmelding (Faktiske)

20

Fase

  • Ikke anvendelig

Kontakter og lokationer

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

Studiesteder

  • Egypten
      • Cairo, Egypten, 11865
        • Faculty of Oral and Dental Medicine, Future University in Egypt (Department of Orthodontics)

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

  • Voksen

Tager imod sunde frivillige

Ja

Beskrivelse

Inclusion Criteria:

  • Adults 18-25 years of age, of both sexes.
  • Mild-to-moderate mandibular anterior crowding (2-6 mm).
  • Angle Class I molar relationship with normal overjet (1-3 mm) and overbite (1-2 mm).
  • Full permanent dentition with a healthy periodontium.
  • Normal anteroposterior and vertical skeletal pattern.

Exclusion Criteria:

  • Any local or systemic condition, or trauma, capable of affecting craniofacial growth and development.
  • History of previous orthodontic or interceptive treatment.
  • Loss of periodontal attachment.
  • Craniofacial anomalies, facial asymmetry or skeletal discrepancy.

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
Aktiv komparator: Fixed appliances (Group FA)
Conventional pre-adjusted edgewise fixed appliance (0.022-inch slot, MBT prescription) bonded from first molar to first molar; levelling and alignment with a sequence of nickel-titanium and stainless-steel archwires over approximately six months.
Enhed: Fixed orthodontic appliance
Brackets bonded first-molar-to-first-molar; alignment sequence 0.014" NiTi → 0.016" NiTi → 0.016 × 0.022" NiTi → 0.017 × 0.025" stainless steel. Interproximal reduction performed on assigned contacts where indicated.
Andre navne:
  • Konventionelle labiale beslag
  • pre-adjusted edgewise appliance (0.022 MBT)
Eksperimentel: Clear aligners (Group CA)
Three-dimensionally printed, thermoformed clear aligners with bonded attachments and interproximal reduction as indicated; worn ~22 hours/day and changed per the digital staging, with clinical review every four weeks over approximately six months
Enhed: Clear aligners
Digital intraoral scan and staging (3Shape Ortho Analyzer); 3D-printed models thermoformed into aligners; attachments bonded where planned; sequential aligners worn ~22 h/day. Interproximal reduction per contact from canine-to-canine is done.
Andre navne:
  • sequential clear aligners
  • Thermoformed removable aligners

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in alveolar bone level
Tidsramme: Baseline (T0) and end of alignment phase (T3)) (approximately 6 months)
Change (mm) in the distance from the cemento-enamel junction to the alveolar crest on the labial and lingual aspects of the mandibular central incisors, lateral incisors and canines, measured on CBCT (OnDemand software), calculated as the difference between baseline and end-of-alignment values.
Baseline (T0) and end of alignment phase (T3)) (approximately 6 months)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Change in alveolar bone thickness
Tidsramme: Baseline (T0) and end of alignment phase (≈ 6 months)
Change (mm) in labial and lingual alveolar bone thickness measured at 3 mm and 6 mm from the CEJ and at the root apex of the mandibular central incisors, lateral incisors and canines on CBCT (OnDemand software), from baseline to end of alignment.
Baseline (T0) and end of alignment phase (≈ 6 months)
Change in mandibular incisor inclination (torque)
Tidsramme: Baseline (T0) and end of alignment phase (≈ 6 months)
Change (degrees) in the inner angle between the long axis of each mandibular central incisors, lateral incisors and canines and the mandibular plane, measured on the sagittal view of CBCT (Invivo/Anatomage software), from baseline to end of alignment.
Baseline (T0) and end of alignment phase (≈ 6 months)
Rate of alignment (Little's Irregularity Index)
Tidsramme: Baseline (T0), 8 weeks (T1), 16 weeks (T2) and end of alignment (T3, ≈ 24 weeks / 6 months)
Reduction in mandibular anterior crowding quantified by Little's Irregularity Index (mm) - the sum of the displaced anatomic contact points from canine to canine - measured on serial digital models; the change across time points and the percentage improvement from baseline describe the rate of alignment.
Baseline (T0), 8 weeks (T1), 16 weeks (T2) and end of alignment (T3, ≈ 24 weeks / 6 months)

Samarbejdspartnere og efterforskere

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

Sponsor

Future University in Egypt

Efterforskere

  • Ledende efterforsker: ahmed mohamed hesham elzoghary, Faculty of Oral and Dental Medicine, Future University in Egypt

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)

15. august 2024

Primær færdiggørelse (Faktiske)

25. juli 2025

Studieafslutning (Faktiske)

15. april 2026

Datoer for studieregistrering

Først indsendt

15. juli 2026

Først indsendt, der opfyldte QC-kriterier

15. juli 2026

Først opslået (Faktiske)

21. juli 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

21. juli 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

15. juli 2026

Sidst verificeret

1. juli 2026

Mere information

Begreber relateret til denne undersøgelse

Nøgleord

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • FUE.REC (18)/7-2024

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

UBESLUTET

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