Effectiveness of Two Skeletally Anchored Force Mechanics for Skeletal Class II Correction in Growing Patients
25. juli 2022 oppdatert av: Yasmine Mohamed Sayed Mahmoud, Alexandria University
Effectiveness of Two Skeletally Anchored Force Mechanics for Correction of Skeletal Class II Malocclusion in Growing Patients (A Randomized Controlled Clinical Trial)
Patients with skeletal Class II malocclusion due to mandibular retrognathism will be recruited and randomly allocated to three equal groups.
first group will be treated by pushing orthopedic force mechanics, second group will be treated by pulling orthopedic force mechanics, and third group will be observed for 9 months to detect the natural growth changes.
Skeletal changes will be evaluated and the treatment changes will be compared with the natural growth changes.
The study hypothesis is that use of direct bimaxillary miniplate anchorage in conjunction with fixed functional appliance (pushing orthopedic force) or closed coil spring (pulling orthopedic force) will induce statistically significant skeletal mandibular growth in comparison to natural mandibular growth changes.
Studieoversikt
Status
Aktiv, ikke rekrutterende
Forhold
Detaljert beskrivelse
A randomized controlled clinical trial will be conducted to address the aim of the study.
Thirty-nine growing patients with skeletal Class II malocclusion due to mandibular retrognathism will be recruited.
The sample will be randomly allocated to three equal groups, each including thirteen subjects.
Group A will be treated by pushing orthopedic force mechanics using fixed functional appliance (Sabbagh Advanced Repositioning Appliance) anchored to four miniplates (two miniplates inserted in the mandibular symphysis and two infrazygomatic miniplates), and Group B, will be treated by pulling orthopedic force mechanics using Class II springs (CS Class II correction device) anchored to four miniplates (two inserted in the mandibular posterior buccal segment and two inserted in the maxillary anterior segment).
In both groups, the appliances will be removed after reaching an edge-to-edge incisor relationship or after 9 months, whichever happens first.
A similar third group (Group C) will be observed for 9 months to detect the natural growth changes.
Skeletal changes will be evaluated using pretreatment and posttreatment cone beam computed tomography scans (CBCT).
The treatment changes will be compared with the natural growth changes observed in group C. Other variables will be also examined including, the dentoalveolar effects, the soft tissue profile, and the patient's acceptance to this treatment modality.
Studietype
Intervensjonell
Registrering (Forventet)
39
Fase
- Ikke aktuelt
Kontakter og plasseringer
Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.
Studiesteder
-
-
-
Alexandria, Egypt, 21526
- Faculty of Dentistry
-
-
Deltakelseskriterier
Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.
Kvalifikasjonskriterier
Alder som er kvalifisert for studier
11 år til 13 år (Barn)
Tar imot friske frivillige
Nei
Kjønn som er kvalifisert for studier
Alle
Beskrivelse
Inclusion Criteria:
- Chronological age ranges from 11 years to 13 years.
- Skeletal Class II malocclusion with a deficient mandible (SNB ≤ 76°).
- Horizontal growth pattern (MP/SN ≤ 39°).
- Angle Class II division 1 malocclusion with at least 5 mm overjet.
- Mandibular arch crowding less than 5 mm.
- The patients have to be in the prepubertal growth stage (cervical maturational stage 3 or 4) when applying orthopedic force.
- Patients with good oral hygiene, and a healthy periodontal condition.
Exclusion Criteria:
- Patients who underwent previous orthodontic treatment.
- Patients with previous craniofacial surgeries, chronic diseases, syndromes, or growth problems that may affect bone.
- Any signs or symptoms of para-functional habits or previous history of temporomandibular disorders.
- Extracted or missing upper permanent teeth (except for third molars).
Studieplan
Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.
Hvordan er studiet utformet?
Designdetaljer
- Primært formål: Behandling
- Tildeling: Randomisert
- Intervensjonsmodell: Parallell tildeling
- Masking: Trippel
Våpen og intervensjoner
Deltakergruppe / Arm |
Intervensjon / Behandling |
|---|---|
|
Eksperimentell: Miniplates in mandibular symphysis & infrazygomatic
|
Fixed functional appliance (pushing orthopedic force) in conjunction with direct skeletal anchorage
|
|
Aktiv komparator: Miniplates in external oblique ridge & anterior maxillary region
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Coil spring (pulling orthopedic force) in conjunction with direct skeletal anchorage
|
|
Ingen inngripen: Growing skeletal Class II subjects
|
Hva måler studien?
Primære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
change in the effective mandibular length (Co-Gn)
Tidsramme: at baseline and after treatment completion about 9 months
|
Correction of the skeletal Class II relation.
This outcome will be detected by measuring the mean change in the effective mandibular length (Co-Gn) and position on CBCT images from baseline data (T1) and after appliance removal (T2) and will be compared with the growth changes observed in the control group
|
at baseline and after treatment completion about 9 months
|
Sekundære resultatmål
Resultatmål |
Tiltaksbeskrivelse |
Tidsramme |
|---|---|---|
|
change in maxillary length (Co-A)
Tidsramme: at baseline and after treatment completion about 9 months
|
The effective maxillary length (Co-A) and position changes will be measured after and chin will be measured.
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at baseline and after treatment completion about 9 months
|
|
Changes in the soft tissue angle of convexity
Tidsramme: at baseline and after treatment completion about 9 months
|
the position of the upper and lower lips, and chin will be measured.
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at baseline and after treatment completion about 9 months
|
|
patient acceptance of treatment
Tidsramme: After treatment completion about 9 months
|
The patient's acceptance to the treatment will be evaluated using a visual analog scale questionnaire after removal of the appliances.
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After treatment completion about 9 months
|
Samarbeidspartnere og etterforskere
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Sponsor
Studierekorddatoer
Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.
Studer hoveddatoer
Studiestart (Faktiske)
8. mars 2021
Primær fullføring (Forventet)
1. desember 2022
Studiet fullført (Forventet)
1. desember 2022
Datoer for studieregistrering
Først innsendt
24. april 2021
Først innsendt som oppfylte QC-kriteriene
10. mai 2021
Først lagt ut (Faktiske)
12. mai 2021
Oppdateringer av studieposter
Sist oppdatering lagt ut (Faktiske)
27. juli 2022
Siste oppdatering sendt inn som oppfylte QC-kriteriene
25. juli 2022
Sist bekreftet
1. juli 2022
Mer informasjon
Begreper knyttet til denne studien
Ytterligere relevante MeSH-vilkår
Andre studie-ID-numre
- Anchored force mechanices
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