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Title: Comparison of Working Length Loss In Manual Versus Rotary (Waveone) Preparation In Curved Canals; A Quasi-Experimental Study
Authors: Mafaza Alam, Muzammil Hussain, Laima Alam, Sadaf Islam, Ajmal Yousaf, Dil Rasheed
Journal: Pakistan Armed Forces Medical Journal (PAFMJ)
Publisher: Army Medical College, Rawalpindi.
Country: Pakistan
Year: 2024
Volume: 74
Issue: 1
Language: English
Keywords: DentistsEndodontic instrumentsDental instrumentsRoot canal preparationEndodonticsRoot canal therapyWaveOne
Objective: To compare the consistency of working length control in hand instrumentation and engine-driven rotary files WaveOne 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.
To compare the consistency of working length control in hand instrumentation and engine-driven rotary files (WaveOne) by comparing their pre and post-instrumentation working lengths.
Quasi-experimental study conducted on 90 extracted mandibular first molars with curved canals. Canals were divided into two groups (n=45): manual preparation with K-files and rotary preparation with WaveOne system. Pre- and post-preparation working lengths were measured using an apex locator and digital radiographs. Statistical analysis was performed using paired samples t-tests.
graph TD
A[Tooth Selection n=90] --> B[Divide into Groups];
B -- Manual[K-files] --> C[Pre-op WL Measurement];
B -- Rotary[WaveOne] --> C
C --> D[Instrumentation];
D -- Manual --> E[Post-op WL Measurement];
D -- Rotary --> E
E --> F[Statistical Analysis];
F --> G[Conclusion: WL Loss Comparison];
The study suggests that manual instrumentation leads to more straightening of the canal, resulting in a greater loss of working length compared to WaveOne. Maintaining working length is crucial for successful endodontic treatment.
Both manual and WaveOne preparation resulted in a statistically significant loss of working length post-operatively. Manual preparation showed a greater loss of working length compared to WaveOne rotary files.
Manual instrumentation causes a greater loss of working length by straightening the canal more than engine-driven WaveOne rotary files postoperatively.
1. The study was conducted from June to December 2019. Confirmed by the text.
2. A total of 90 mandibular first molars were selected. Confirmed by the text.
3. The mean pre-operative working length of manually prepared canals was 18.5 ± 1.03mm. Confirmed by the text.
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