Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32586
Reverse Twin Block with Expansion Screw for Treatment of Skeletal Class III Malocclusion in Growing Patient: Case Report

Authors: Alfrina Marwan, Erna Sulistyawati


Class III malocclusion shows both skeletal and dentoalveolar component. Sketal Class III malocclusion can have variants in different region, maxilla or mandibular. Skeletal Class III malocclusion during growth period is considered to treat to prevent its severity in adulthood. Orthopedics treatment of skeletal Class III malocclusion in growing patient can be treated by using reverse twin block with expansion screw to modify the growth pattern. The objective of this case report was to describe the functional correction of skeletal Class III maloclussion using reverse twin block with expansion screw in growing patient. A patient with concave profile came with a chief complaint of aesthetic problems. The cephalometric analysis showed that patient had skeletal Class III malocclusion (ANB -50, SNA 75º, Wits appraisal -3 mm) with anterior cross bite and deep bite (overjet -3 mm, overbite 6 mm). In this case report, the patient was treated with reverse twin block appliance with expansion screw. After three months of treatment, the skeletal problems have been corrected (ANB -1°), overjet, overbite and aesthetic were improved. Reverse twin block appliance with expansion screw can be used as orthopedics treatment for skeletal Class III malocclusion in growing patient and can improve the aesthetic with great satisfaction which was the main complaint in this patient.

Keywords: Growing patient, maxilla retrognatism, reverse twin blocks, skeletal Class III malocclusion.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 796


[1] Woon S C, Thiruvenkatachari B. Early orthodontic treatment for Class III malocclusion: A systematic review and mete-analysis. American Journal of Orthodontics and Dentofacial Orthopedics 2017;151:28-51.
[2] Navarro P V P O, Almeida R R D, Conti A C D C F, Navarro R D L, Almeida M R D, Fernandes L S A F P. Early treatment protocol for skeletal Class III malocclusion. Brazilian Dental Journal 2013;24:167-173.
[3] Sargod S S, Shetty N, Shabbir A. Early class III management in deciduous dentition using reverse twin block. J Indian Soc Ped Prev Dent 2013;31:56-60.
[4] Chungh V K, Tandon P, Prasad V, Chungh A. Early orthopedic correction of skeletal class III malocclusion using combined reverse twin block and face mask theraphy. J Indian Soc Pedod Prev Dent 2015;33:3-9.
[5] Soni S, Prashar A, Kaur S, Bansal N, Garg V, Singh J. Versatile functional appliance-twin block. Int J Curr Res Med Sci 2017;3:115-9.
[6] Mittal M, Sigh H, Kumar A, Sharma P. Reverse twin block for interceptive management of developing Class III malocclusion. J Indian Soc Pedod Prev Dent 2017;35:86-9.
[7] Seehra J, Fleming P S, Mandall N, DiBiase A T. A comparison of two different techniques for early correction of Class III malocclusion. Angle Orthodontist 2012;82:96-101.
[8] Clark W. Design and management of twin blocks: reflection after 30 years of clinical use. Journal of Orthodontics 2010;37:209-16.