CLASS II DIVISION 1 MALOCCLUSION Clinical Trial
Official title:
Cephalometric Indicators of Biological Responsiveness to Orthodontic Treatment of Class II/I in Growing Patients
This investigation aims at distinguishing the subjects that react in a favorable way to the treatment protocol we propose for the Class II treatment
Class II Division 1 is a prevalent malocclusion. Many methods have been utilized to correct
it.
The purpose of our prospective study is to clarify the specific cephalometric indicators of
biological responsiveness that lead to a successful Class II Div.1 treatment in growing
individuals. These indicators will hopefully assist in the differential diagnosis of a
"true" and a "pseudo" Class II, that is a masked Class I, that we presume will be relatively
easy to treat and stable a treatment result.
70 -100 subjects with a Class II/I malocclusion will be recruited and treated with the exact
mode of treatment. As Class II we consider the one that is a t least half molar cusp Class
II. Patients will already erupted lower first premolars will be included as we presume this
is the approximate time of the maximum growth spurt which we want to exploit using the
functional appliance. Crowding in both arches should not exceed 4 mm so as to exclude any
denoalveolar changes due to alignment. Any tooth agenesis, besides the third molars, will
exclude the subject from the study. The medical history of the patient should be
non-contributory regarding any hormonal abnormalities, arthritis and pain from the TMJ.
Syndromic patients and those exhibiting craniofacial abnormalities will be excluded.
The skeletal age of each patient will be assessed by observing the cervical column.
Every patient will have his records taken, the latter including a lateral ceph and a
panoramic x-ray. Standard intra- and extra oral pictures will be taken as well (T0).
The treatment protocol includes a first phase of 3-4 months of slow palatal expansions
utilizing a removable palatal plate with a 0.25 mm jackscrew in the middle (T1). The screw
will be turned once a week for two weeks and then twice a week until the upper posterior
teeth are over-expanded 2 mm per side. During phase II (T2)the patient will be asked to wear
the same appliance adjusted as such to incorporate a tongue crib that will force the
mandible into a Class I relationship acthing the way the know functional appliances work (eg
activator). The crib will incorporate 4 loops in the canine area and will be placed so as
not to impinge in the lower lingual gingival region but it will be long enough so as the
patient will not be able to shift the mandible back. If the initial overjet exceeds 5 mm the
mandibular advancement will be gradual. Further adjustments will be made so as to maintain
the Class I relationship. The patient will wear the appliance for 8-12 months (T3). New
records will be taken at that time. If braces are needed, the patient will continue with
fixed appliances.
;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
Status | Clinical Trial | Phase | |
---|---|---|---|
Completed |
NCT04619446 -
Dentoskeletal Changes Produced by Growth Modification Appliances in Treatment of Skeletal Class II Malocclusion
|
||
Active, not recruiting |
NCT05171738 -
Distalization Via Skeletally-anchored Distaljet Appliance With Two Approaches of Micro-osteoperforations
|
N/A | |
Completed |
NCT01853137 -
Fixed Lingual Mandibular Growth Modificator
|
N/A | |
Completed |
NCT01853995 -
Mechanism of Class II Correction With Fixed Lingual Mandibular Growth Modificator (FLMGM)
|
Phase 2 | |
Completed |
NCT04814173 -
The Efficacy of Tow Mechanics for Total-maxillary-arch-distalization
|
N/A | |
Recruiting |
NCT03839303 -
Comparison Between Mini Implant Supported Appliance and Headgear in Treatment of Maxillary Excess in Growing Patients
|
N/A | |
Completed |
NCT04847492 -
Evaluation of Upper Anterior Teeth Retraction Rate Assisted by Two Corticotomy Techniques
|
N/A | |
Recruiting |
NCT04810286 -
Prefabricated Versus 3D-Printing Myofunctional Appliances
|
N/A | |
Not yet recruiting |
NCT03764189 -
Evaluation of Micro-osteoperforation on Rate of Maxillary En-masse Retraction
|
N/A | |
Terminated |
NCT00957489 -
A Prospective Randomized Controlled Trial to Evaluate the Effectiveness of the Two Different Appliances in the Treatment of Class II Division 1 Malocclusion
|
N/A | |
Recruiting |
NCT04743258 -
Bilateral Premolar Extraction vs Distalization: A Randomised Clinical Trial
|
N/A | |
Active, not recruiting |
NCT04191070 -
Distalization Using Infrazygomatic Crest Miniscrews and Zygomatic Miniplates: A Randomized Clinical Trial
|
N/A | |
Completed |
NCT05335824 -
The Effect of Autologous Platelet Concentrations on Orthodontic Treatment Time
|
N/A | |
Completed |
NCT06133361 -
The Effect of Platelet-rich Plasma on the Rate and Type of Orthodontic Tooth Movement
|
N/A | |
Completed |
NCT05542745 -
Measuring Rate of Anteriors Retraction With Two Different Techniques
|
N/A | |
Completed |
NCT05040945 -
Evaluation of the Levels of Pain and Discomfort Associated With Two Techniques of Corticotomy
|
N/A | |
Completed |
NCT05928143 -
Patient Outcomes Associated With Two Accelerated Method of Retraction of Upper Front Teeth
|
N/A | |
Completed |
NCT04316403 -
Laser-assisted Flapless Corticotomy in Accelerating Canine Retraction
|
N/A | |
Not yet recruiting |
NCT03635463 -
Effect of Modified Twin Block in Skeletal Class II Growing Females With Mandibular Deficiency
|
N/A | |
Completed |
NCT03467555 -
Evaluation of Distal Movement of Maxillary Dentition With Zygomatic Miniplates Using Cone Beam Computed Tomography
|
N/A |