EFFECT OF PREFORMED TAPERED NICKEL TITANIUM ORTHODONTIC ARCH-WIRES ON MANDIBULAR INTER-CANINE WIDTH TO PREDICT FUTURE LONG-TERM STABILITY

Authors

  • Sundus Wahid Department of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
  • Najam ul Hassan Department of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
  • Gulsanga Hassan Khan Department of Orthodontics and Dentofacial Orthopedics, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
  • Abid Hussain Kanju Department of Orthodontics, Bakhtawar Amin Medical and Dental College Multan, Pakistan
  • Usman Mahmood Department of Science of Dental Materials, Lahore Medical and Dental College, Lahore, Pakistan
  • Emaan Mansoor Islamic International Dental College, Riphah International University, Islamabad, Pakistan
  • Afsheen Mansoor Department of Science of Dental Materials, School of Dentistry, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad, Pakistan
  • Mudassar Mushtaq Jawad Abbasi Health Services Academy Islamabad, Pakistan

DOI:

https://doi.org/10.69656/pjp.v21i3.1872

Keywords:

Archforms, intercanine width, preformed archwires, Stability

Abstract

Background: Maintaining the pre-treatment mandibular inter-canine dimension is crucial for stable post-treatment retention as minor changes can increase post-treatment relapse. This study aimed to identify changes in mandibular inter-canine width caused by active orthodontic treatment using tapered preformed NiTi mandibular arch-wires and predict future stability proportionally. Methods: A 6 months’ study at School of Dentistry Islamabad involved 60 patients with tapered mandibular arch forms, fully erupted, non-anomalous, and permanent mandibular canines. The patients underwent non-extraction fixed orthodontic mechanical therapy treatment using conventional pre-adjusted edgewise brackets. The study involved detailed clinical examination, orthodontic study casts, orthopantomograms, and lateral cephalograms. The initial pre-treatment mandibular inter-canine width was recorded using digital vernier caliper. After levelling and alignment, the mandibular cast impressions were repeated, and mid-treatment inter-canine width was calculated. Results: Statistically significant differences were found between pre-treatment and post-treatment widths. The mean pre-treatment width was 26.81 mm, while the mid-treatment width increased to 27.26 mm after levelling and alignment. Statistically significant differences (p=0.001) were found between pre-treatment mandibular inter-canine width (T1) to during treatment mandibular inter-canine width when considering gender. When considering age-wise analysis, there were no statistically significant differences between pre-treatment mandibular inter-canine width (T1) to during treatment mandibular inter-canine width. Conclusion: The commercially available preformed tapered NiTi arch-wires alter the original mandibular inter-canine width in patients which have a natural tapered mandibular arch-form, increasing the risk of relapse, hence predicting future long-term instability.

Pak J Physiol 2025;21(3):46–9, DOI: https://doi.org/10.69656/pjp.v21i3.1872

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Published

30-09-2025

How to Cite

1.
Wahid S, Hassan NU, Hassan Khan G, Kanju AH, Mahmood U, Mansoor E, et al. EFFECT OF PREFORMED TAPERED NICKEL TITANIUM ORTHODONTIC ARCH-WIRES ON MANDIBULAR INTER-CANINE WIDTH TO PREDICT FUTURE LONG-TERM STABILITY. Pak J Phsyiol [Internet]. 2025 Sep. 30 [cited 2025 Oct. 10];21(3):46-9. Available from: https://pjp.pps.org.pk/index.php/PJP/article/view/1872

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Original Article