A Comparative Clinical Study of Mandibular Incisor Decrowding Using Different Pre-Adjusted Edgewise Brackets with Different Interbracket Span

  • Abhimanyu Rohmetra Consultant Orthodontist, Department of Orthodontics and Dentofacial Orthopaedics, Jammu, J&K, India.
  • Niharika Gupta PG Student, Department of Oral and Maxillofacial Surgery, J.N. Kapoor DAV(C) Dental College, Yamunanagar, Haryana, India.
  • Sakshi Mahajan Practising Dental Surgeon, Jammu, J&K, India.
  • Saksham Narainia PG Student, Department of Conservative Dentistry and Endodontics, M.R. Ambedkar Dental College and Hospital, Bangalore, Karnataka, India.
  • Ishita Gupta Intern, Institute of Dental Sciences, Sehora, Jammu, J&K, India.
Keywords: Decrowding, Mandibular, Incisor, Interbracket Span.


Introduction: Aim of the present was to determine and compare the efficiency of different pre-adjusted edgewise brackets with different Inter-bracket span in mandibular incisor decrowding and to determine and compare the amount of incisor proclination during decrowding if any.

Material and Method: 20 patients were selected and divided into two groups, group I with Double width brackets (3M Unitek Gemini Series) 0.018” slot with Roth prescription and group II with Mini Uni-Twin Bracket. (3M Unitek) 0.018” slot with Roth prescription. Pretreatment records were taken included lateral cephalogram, study models, and photographs. Little’s irregularity index was calculated for both groups also IMPA was calculated for both at regular intervals and finally compared with post-treatment records.

Result: Little’ irregularity index in group II was having a slightly higher ratio. Both Group I and Group II cases demonstrated an increase in the proclination of the lower anterior during decrowding.

Conclusion: The Mini Uni Twin brackets were found to align the lower anterior faster. Mini Uni Twin brackets are comparatively efficient in the lower anterior decrowding.