Comparison of Working Length Loss In Manual Versus Rotary (Waveone) Preparation In Curved Canals; A Quasi-Experimental Study


  • Mafaza Alam operative department, AFID
  • Muzammil Hussain
  • Laima Alam
  • Sadaf Islam
  • Ajmal Yousaf
  • Dil Rasheed



Endodontic instruments, Dentists, Dental instruments, Root canal preparation, Endodontics, Root canal therapy, WaveOne


Objective: To compare the consistency of working length control in hand instrumentation and engine-driven rotary files Wave
One by comparing their pre and post-instrumentation working lengths.

Study Design: Quasi-experimental study.

Place and Duration of Study: Armed Forces Institute of Dentistry, Rawalpindi Pakistan, from Jun to Dec 2019.

Methodology: A total of 90 mandibular first molars were selected. Two groups were drawn with 45 mesio buccal canals each. The First-Group was prepared with manual K-files, whereas the second group had rotary instrumentation using the WaveOne system. Pre and post-preparation working lengths were noted.

Results: The mean pre-operative (18.5±1.03mm) and post-operative (18.15±1.09mm) working lengths of manually prepared and WaveOne prepared canals (18.8±3.43mm and 18.7±3.25mm respectively) presented statistically significant loss of postoperative working lengths. The comparison of the two groups gives a statistically significant result in manual preparation,
showing a greater loss of working length as compared to canals prepared with WaveOne rotary files.

Conclusion: Manual instrumentation causes a greater loss of working length by straightening the canal more than enginedriven WaveOne rotary files postoperatively.


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How to Cite

Alam, M., Hussain, M., Alam, L., Islam, S., Yousaf, A., & Rasheed, D. (2024). Comparison of Working Length Loss In Manual Versus Rotary (Waveone) Preparation In Curved Canals; A Quasi-Experimental Study. Pakistan Armed Forces Medical Journal, 74(1), 156–159.



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