A class II patient usually shows either a protrusive upper jaw, retrusive lower jaw or both. Management of the class II involves distalizing of maxillary dentition or mesialization of mandibular dentition or camouflage treatment. Distalization of maxillary dentition can be done using extra oral such as Headgear and intraoral appliances alike Pendulum Appliance, Distal Jet, Jones Jig, Molar Thruster Appliance. In this study the Molar Thruster Appliance was modified and designed to improve the efficacy and patient comfort of the appliance. This appliance is known as the Modified Molar Thruster Appliance. This study is intended to Evaluate the Stress and displacement on the molars of the Modified Molar Thruster Appliance through the Finite Element Analysis. Result: Stress caused by the appliance on the tooth was more on the coronal portion of the mesial part of the premolar which indicates the reactionary force caused by the appliance leading to anchorage loss. Displacement was seen more on the first molars in the disto-buccal direction. Further clinical research is required to comprehend and contrast its results with those of other molar-distalization like appliances.

• Distalization ,
• Molar Thruster Appliance

[1] Keles A, Erverdi N, Sezen S. Bodily distalization of molars with absolute anchorage. The Angle Orthodontist. 2003 Aug;73(4):471-82

[2] Gandhi V, Mehta F, Parekh H, Agrawal M. A new appliance for efficient molar distalization. Journal of clinical orthodontics: JCO. 2017 Nov;51(11):738

[3] Rossini G, Schiaffino M, Parrini S, Sedran A, Deregibus A, Castroflorio T. Upper Second Molar Distalization with Clear Aligners: A Finite Element Study. Applied Sciences. 2020 Jan;10(21):7739

[4] Öztürk Y, Firatli S, Almaç L. An evaluation of intraoral molar distalization with nickeltitanium coil springs. Quintessence international. 2005 Oct 1;36(9)