Evaluation Of Anchorage Control Using Arch Wire Stopper Versus Mini-Screws

The study begins with patient selection according to inclusion and exclusion criteria, followed by treatment planning, and then bonding of orthodontic brackets of the upper and lower arches, including the second maxillary molars.

After leveling and alignment for all participants, the extraction of the maxillary first premolars will be performed.

• In the "Intervention Group" Canine retraction will be performed on 0.017×0.025 ss archwire with an archwire stopper mesial to the upper first molar.

Afterwards, anterior segment retraction will be done using T-loop on 0.017x0.025 TMA archwire

• In the "Comparator Group" Canine retraction on 0.017×0.025 ss archwire with the upper first molars indirectly anchored to inter-radicular mini screws Afterwards, anterior segment retraction will be done using T-loop on 0.017x0.025 TMA archwire

Lastly, the anchorage control in both groups and the secondary outcomes will be assessed using the obtained digital models and lateral cephalometric radiographs.

Inclusion criteria

• Post-pubertal female patients.
• Cases with bimaxillary protrusion or Class II Division 1 malocclusion that require maxillary first premolars extraction.
• Full permanent dentition (not necessitating third molars).
• Good oral hygiene.

Exclusion criteria

• Medically compromised patients.
• Active periodontal disease or obvious bone loss in the maxillary arch.
• Patients with habits that are detrimental to dental occlusion (thumb sucking, tongue thrusting).
• Smoking or any systemic diseases.
• Chronic use of any medications including antibiotics, phenytoin, cyclosporine, anti-inflammatory drugs, systemic corticosteroids, and calcium channel blockers. All the above factors affect the rate of tooth movement
• Previous orthodontic treatment.
• Missing teeth.