MANUFACTURER TOLERANCE IN SLOT HEIGHT OF 0.022-INCH MAXILLARY CANINE BRACKETS

  • Taimoor Khan BDS, FCPS-II Resident Depatment of Orthodontics, Institute of Dentistry, CMH Lahore Medical College, Lahore, Pakistan
  • Haris Khan BDS, FCPS, FFDRCSI, Associate Professor Orthodontics, CMH Lahore Medical College, Institute of Dentistry, Abdur Rehman Road, Lahore Cantt.
  • Sadia Mohsin BDS, Post Graduate FCPS-II Resident Department of Orthodontics, Institute of Dentistry, CMH Lahore Medical College, Lahore
  • Muhammad Qasim Saeed BDS, PhD (Orthodontics) Professor Orthodontics/Dean of Dentistry-Institute of Dentistry, CMH Lahore Medical College, Lahore
  • Fayyaz Ahmad BDS, FCPS, Morth RCS. FFDRCSI, FDS. Consultant Orthodontist, Security Forces Hospital, Dammam, Saudi Arabia.
Keywords: Slot height, 0.022-inch brackets, Leaf gauges, Micrometer

Abstract

Orthodontic brackets manufacturer does not reveal their actual slot height. Tolerance if present in bracket slot can lead to poor three-dimensional control of teeth. This study was done to determine the manufacturer tolerance in slot height of maxillary canine brackets.

Mesial and distal slots of one hundred and forty stainless steel maxillary canine brackets of seven commercial brands in 0.022-inch (“) slot were measured individually with leaf gauges of 0.01millimeter (mm) thickness. Digital readout in inches of leaf gauges was attained by micrometer. Descriptive statistics were generated for bracket slot height and one sample T test was used to check whether significant tolerance exist in slot height. A p value < 0.05 was considered as significant.

Smallest mean slot height of 0.0233+.0006 “ was noted in mesial slot of Db orthodontics brackets while largest mean height of 0.0258+.0015 “ were present in mesial slot of Mesal brackets. Maximum slot height of 0.028 “ was noted in Precise and Sia brackets. Increase tolerance in brackets were noted in the range of 5.9 to 17.2%. A p value < 0.05 was found in all the slot heights under study showing significant difference from acceptable tolerance.

All the bracket series have significant oversized slot height on both mesial and distal aspect. European orthodontic brackets were closer to standards than brackets manufactured in USA.

Published
2018-09-10
How to Cite
Khan, T., Khan, H., Mohsin, S., Saeed, M. Q., & Ahmad, F. (2018). MANUFACTURER TOLERANCE IN SLOT HEIGHT OF 0.022-INCH MAXILLARY CANINE BRACKETS. Pakistan Oral & Dental Journal, 38(2), 200-203. Retrieved from http://podj.com.pk/index.php/podj/article/view/199
Section
Orthodontics