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

Not Applicable

Completed

• Conditions: Deep Overbite
• Interventions: Device: Routine leveling and alignment; Device: Auxiliary cantilever intrusion arches on initial archwires

• Registration Number: NCT05654558
• Lead Sponsor: Alexandria University

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Study Start: 2020-09-12
• Primary Completion: 2022-06-15
• Study Completion: 2022-06-30
• Status Verified: 2022-12
• Study First Submitted: 2022-12-08
• Study First Submitted QC: 2022-12-08
• Last Update Submitted: 2022-12-08
• Study First Posted: 2022-12-16
• Last Update Posted: 2022-12-16

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 27

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Routine leveling and alignment	Routine leveling and alignment	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.
Auxiliary intrusion cantilevers	Auxiliary cantilever intrusion arches on initial archwires	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.

Primary Outcome Measures

Name	Time	Method
Extrusion of lower first molar	six months	Perpendicular distance between the mesio-buccal cusp tip of the lower first molar and mandibular plane measured on lateral cephalometric x-rays
Lower incisor intrusion and proclination	six months	Perpendicular distance between the incisal edge of the lower central incisor and mandibular plane measured on lateral cephalometric x-rays
True incisor intrusion	six months	Perpendicular distance between the center of resistance of mandibular central incisor and the mandibular plane measured on lateral cephalometric x-rays
Overbite	six months	Distance between incisal edges of upper and lower incisors measured on lateral cephalometric x-rays
Proclination of lower incisors	six months	Angle formed by the long axis of mandibular central incisor and mandibular plane measured on lateral cephalometric x-rays
Lower incisor intrusion	six months	Perpendicular distance between the apex of the lower central incisor and mandibular plane measured on lateral cephalometric x-rays
Distal tip of lower first molar	six months	Angle formed between the long axis of lower 1st molar and mandibular plane measured on lateral cephalometric x-rays

Secondary Outcome Measures

Name	Time	Method
Root resorption of lower incisors	six months	Length of lower incisor roots was compared in before- and after-periapical radiographs taken with a paralleling technique.
Depth of curve of Spee	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
Depth of gingival sulcus	six months	The sulcus depth was measured using Michigan O periodontal probe.
Width of keratinized gingiva	six months	Measured with the aid of periodontal probe from the free gingival margin to the mucogingival junction.

Trial Locations

Locations (1)

Faculty of Dentistry, Alexandria University; 🇪🇬 Alexandria, Egypt