Deep Overbite
Conditions
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.
Interventions
DEVICEAuxiliary 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.
DEVICERoutine 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.
Sponsors
Alexandria University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
12 Years to 17 Years
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
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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 |
| 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 and proclination | six months | Perpendicular distance between the incisal edge of the lower 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 |
| 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 |
| Overbite | six months | Distance between incisal edges of upper and lower incisors 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 |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| 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. |
| 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 |
Countries
Egypt
Outcome results
None listed