Insight into Twin Block - A Versatile Appliance

Abstract

Introduction: In orthodontics, several patients present with Class II malocclusions, which necessitates the implementation of Interceptive measures to mitigate the risk of development of severe complications. Functional appliances, specifically twin blocks, are pivotal for growth modification because they are adaptable in treating diverse malocclusions.¹ This review article aims to elucidate various modifications that can be implemented to tailor the appliance to the unique needs of individual patients.²

Methodology: This literature review aligned with the guidelines of the Pakistan Orthodontics Journal and involved a comprehensive literature search across databases such as Dentistry & Oral Sciences Source, MEDLINE, CINAHL Ultimate, and AMED. The investigation also involved a hand search of grey literature and national and international journals, with research data gathered from identified articles.

Results: Various design modifications of twin block identified by the existing literature included standard Clark's design³; evolved twin block; evolved clark’s twin block with torquing spurs; modified twin block having the combination of high pull headgear and torquing spurs; modified twin block having southend clasp on mandibular central incisors; evolved clark’s twin block having modified adam’s clasp on maxillary and mandibular central incisors; evolved twin block with acrylic capping; evolved twin block for class II div 2 malocclusion; and Dr. Gerber’s neuromuscular banded block design.

Conclusion: The modified designs of the clark’s twin block device demonstrate enhanced efficacy in addressing various malocclusion issues, showcasing the appliance's versatility and potential for expedited treatment across different clinical scenarios.