Clinical Research Directory

Effects of Power Arm Application in Maxillary Canine Distalization

The aim of this study is to investigate the effects of a canine distalization force applied between power arms placed on the maxillary canine and first molar, in comparison with the classical method without power arms. Following maxillary first premolar extraction, canine distalization is commonly accompanied by undesirable effects such as distal tipping and distopalatal rotation of the canine and mesial movement (anchorage loss) of the first molar. By bringing the applied force closer to the teeth's centers of resistance through power arms, the study seeks to move the canine into the extraction space as close to parallel (bodily) movement as possible. The hypothesis is that applying force with Ni-Ti closed-coil springs between power arms placed on the molar and canine teeth reduces undesirable dental effects such as rotation, tipping and anchorage loss during distalization compared with the classical method. In a split-mouth design, 16 patients with maxillary first premolar extractions and moderate anchorage requirement receive power-arm mechanics on one randomly selected side (study side) and conventional mechanics on the other side (control side), with a 150 g force on both sides, over three months of canine distalization.

Palatal Guide Wire for Canine Control During Miniscrew-Supported Distalization

When crowded or protruded teeth are treated by removing an upper premolar on each side, the canine (eye tooth) is first moved backward into the space. As it moves, the tooth tends to rotate and tip out of position, and this rotation is one of the hardest movements to correct and most likely to come back later. This study tested a simple addition to the usual treatment: a small passive wire attached to the inner (palate) side of the canine and connected to the back tooth, meant to guide the canine and keep it from rotating, without adding any extra force. Sixteen adolescents who needed an upper premolar removed on both sides took part. Because each person has two sides, every patient received both approaches at once: on one randomly chosen side the guide wire was added, and the other side was treated the same way but without it, serving as that patient's own comparison. This split-mouth design lets each patient act as their own control. The canine was moved backward on both sides using the same light spring and a small bone screw for anchorage. The researchers took dental scans at the start and after one, two, and three months and measured how far each canine moved, how much it rotated and tipped, and whether the back tooth drifted forward. The goal was to find out whether the guide wire reduces unwanted rotation and tipping and affects how quickly the canine moves, without weakening the anchorage.

Maxillary Canine Retraction Using Stainless Steel and Titanium-molybdenum Alloy Wires in TAD-supported Segmental Mechanics

The goal of this randomized clinical study is to compare the effectiveness of stainless steel (SS) and titanium-molybdenum alloy (TMA) wires for maxillary canine retraction using TAD-supported segmental mechanics. The main question it aims to answer is: Which wire material, stainless steel or titanium-molybdenum alloy, provides better outcomes in maxillary canine retraction when used with TAD-supported segmental mechanics? Researchers will compare SS reverse-closing loops with TMA reverse-closing loops to evaluate differences in the rate of canine retraction and canine angulation changes during orthodontic space closure. Participants will: * Receive mini-implants/TADs on both sides of the maxillary arch. * Receive a stainless steel reverse-closing loop on one side and a TMA reverse-closing loop on the contralateral side. * Receive the same standardized force of 150 g on both sides. * Visit the clinic every 4 weeks for a total duration of 4 months. * Undergo OPG radiographs before retraction and after the 4-month study period to assess canine angulation.

Evaluation of Three-Dimensional Printed Orthodontic Molar Distalizer

A randomized clinical trial to evaluate a newly designed 3D printed miniscrew-supported molar distalization device in comparison to the conventional miniscrew-supported distal jet appliance in correction of Class II malocclusion and upper arch crowding.

Efficacy of Orthodontic Tooth Movement Using Beveled and Conventional Attachments in Aligners

The objective of this study is to evaluate the efficacy of tooth movement using beveled attachments and conventional attachments. The sample will be consecutively selected, comprising participants seeking orthodontic treatment in a private dental office within the recruitment period (from ethics committee approval to July 2027). Participants will be selected and randomized using a split-mouth study design. Groups will be divided into rectangular and beveled attachments, each further subdivided into subgroups for horizontal movements (Group H), vertical movements (Group V), and rotations (Group R), with 20 teeth/attachments per group, totaling a sample of 120 teeth/attachments. Digital study models will be obtained before the start of treatment and immediately after its completion. Additionally, clinical intraoral and extraoral photographs will be taken (pre- and post-treatment). Measurements will be collected from the initial and final digital models to determine the magnitude and direction of movements resulting from treatment. Descriptive statistics will be calculated for each type of dental movement evaluated. Paired tests will be conducted due to the split-mouth design. Correlation tests will be applied if necessary.