Deep Bite Correction Using Auxiliary Intrusion Cantilevers With Initial Archwires in Adolescents
Trial Snapshot
- Phase
- Not Applicable
- Status
- Completed
- Sponsor
- Alexandria University
- Enrollment
- 27
- Locations
- 1
- Primary Endpoint
- True incisor intrusion
Study Overview
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.
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- None
Eligibility Criteria
- Ages
- 12 Years to 17 Years (Child)
- Sex
- All
- Accepts Healthy Volunteers
- No
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
Arms & Interventions
Auxiliary intrusion cantilevers
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.
Intervention: Auxiliary cantilever intrusion arches on initial archwires (Device)
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.
Intervention: Routine leveling and alignment (Device)
Outcomes
Primary Outcomes
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
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
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
Overbite
Time Frame: six months
Distance between incisal edges of upper and lower incisors measured on lateral cephalometric x-rays
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
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
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
- Root resorption of lower incisors(six months)
- Depth of curve of Spee(six months)
- Depth of gingival sulcus(six months)
- Width of keratinized gingiva(six months)
Investigators
Mona El-Maghraby
MSc candidate, Orthodontics Department, Faculty of Dentistry, Alexandria University
Alexandria University