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

Alexandria University

Status: Completed

Conditions: Deep Overbite

Treatments: Device: Auxiliary cantilever intrusion arches on initial archwires; Device: Routine leveling and alignment

Study type: Interventional

Funder types: Other

Identifiers

NCT05654558

0049-08/2019

Details and patient eligibility

About

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.

Enrollment: 27 patients

Sex: All

Ages: 12 to 17 years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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27 participants in 2 patient groups

Auxiliary intrusion cantilevers

Experimental group

Description:

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.

Treatment:

Device: Auxiliary cantilever intrusion arches on initial archwires

Routine leveling and alignment

Active Comparator group

Description:

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.

Treatment:

Device: Routine leveling and alignment