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Completed

NCT Number: NCT05654558

Deep Bite Correction Using Auxiliary Intrusion Cantilevers With Initial Archwires in Adolescents

The purpose of this study was to determine the effect of auxiliary intrusion cantilevers used with resilient archwires during the leveling and alignment phase in intruding lower incisors.

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Key information

Conditions

Deep Overbite Malocclusion Malocclusion, Angle Class II Overbite Stomatognathic Diseases Tooth Diseases

Age range

12 year–17 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Faculty of Dentistry, Alexandria University

Alexandria, 21527, Egypt

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Permanent dentition present except for third molars
  • No history of previous orthodontic treatment.
  • Class I or II malocclusion with minimal or no lower anterior crowding (<3 mm)
  • Excessive overbite (>3 mm).

Exclusion criteria

  • Syndromic patients as well as individuals with skeletal asymmetry
  • Endodontically treated or periodontally involved loweranterior teeth.
  • Need for tooth extraction in the lower arch.
  • Agenesis (except for third molars)
  • Any kind of tooth/root shape anomaly

Treatment and study plan

Auxiliary cantilever intrusion arches on initial archwires

Device

Patients received a full set of 0.022- inch slot brackets (Mini 2000, Ormco) with Roth prescription. Lower first molars received double tubed bands while 2nd molars received single bondable tubes. Leveling and alignment phase then started with 0.014 inch NiTi wires engaging all teeth and synched behind 2nd molars. Two 0.017" x 0.025" TMA (Ormco) sectional wires were attached to auxiliary tubes on 1st molars with tip back bends mesial to the molars and attached with hooks distal to lateral incisors on top of basal leveling arch wire. Amount of intrusive force was measured to range between 20 and 40 grams per side. Basal leveling arches were upgraded whenever needed. All patients were assessed after 6 months of treatment.

Routine leveling and alignment

Device

Patients received a full set of 0.022- inch slot brackets (Mini 2000, Ormco) with Roth prescription, 1st and 2nd molars received tubes or bands according to each patient's further needs Lower arch was leveled and aligned with sequential wires starting with 14 NiTi and upgraded when needed. All patients were assessed after 6 months of treatment.

Other names: Relative Intrusion

Primary outcomes

  1. Overbite

    Time frame: six months

    Distance between incisal edges of upper and lower incisors measured on lateral cephalometric x-rays

  2. True incisor intrusion

    Time frame: six months

    Perpendicular distance between the center of resistance of mandibular central incisor and the mandibular plane measured on lateral cephalometric x-rays

  3. Proclination of lower incisors

    Time frame: six months

    Angle formed by the long axis of mandibular central incisor and mandibular plane measured on lateral cephalometric x-rays

  4. Lower incisor intrusion and proclination

    Time frame: six months

    Perpendicular distance between the incisal edge of the lower central incisor and mandibular plane measured on lateral cephalometric x-rays

  5. Lower incisor intrusion

    Time frame: six months

    Perpendicular distance between the apex of the lower central incisor and mandibular plane measured on lateral cephalometric x-rays

  6. Extrusion of lower first molar

    Time frame: six months

    Perpendicular distance between the mesio-buccal cusp tip of the lower first molar and mandibular plane measured on lateral cephalometric x-rays

  7. Distal tip of lower first molar

    Time frame: six months

    Angle formed between the long axis of lower 1st molar and mandibular plane measured on lateral cephalometric x-rays

Secondary outcomes

  1. Depth of curve of Spee

    Time frame: six months

    Measured on dental casts by summing the right and left side maximum depths from a flat plane formed by the tips of the mandibular incisors anteriorly and the distal cusp tips of the second molars posteriorly

  2. Depth of gingival sulcus

    Time frame: six months

    The sulcus depth was measured using Michigan O periodontal probe.

  3. Width of keratinized gingiva

    Time frame: six months

    Measured with the aid of periodontal probe from the free gingival margin to the mucogingival junction.

  4. Root resorption of lower incisors

    Time frame: six months

    Length of lower incisor roots was compared in before- and after-periapical radiographs taken with a paralleling technique.

Sponsors and collaborators

Lead sponsor

Alexandria University

Other

Registry information

Important dates

Study start
2020
Primary completion
2022
Study completion
2022
First posted
Dec 16, 2022
Registry last updated
Dec 16, 2022

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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