| Autor: |
Shah, Romilkumar, Bhanushali, Manisha |
| Předmět: |
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| Zdroj: |
Journal of Advanced Zoology; 2024, Vol. 45 Issue 1, p545-560, 16p |
| Abstrakt: |
Aim: To compare and evaluate the rate of space closure by combination stainless steel arch-wire and conventional stainless steel arch-wire for enmass space closure. Materials and Methods: Random selection of twenty patients with treatment plan of first premolar extractions was done. After alignment and leveling up to 0.019" x 0.025" NiTi archwire a lateral cephalogram and orthodontic study model had been taken as a part of pre-retraction records. Two groups were formed depending on the type of archwire used for extraction space closure. Patients were randomly and equally divided into the two groups with the use of research randomizer software. Group-A: Control group was given conventional rectangular stainless steel arch wire (0.019" x 0.025") and Group-B: Experimental group was given combination stainless steel arch wire (0.019" x 0.025" (Anterior) / 0.019" (Posterior). For en-mass retraction force of 200 gm/side was applied with use of NiTi closed coil springs. The springs were engaged from micro implant located between second premolar and first molar to the crimpable hooks positioned distal to the lateral incisor on the archwire. Post-retraction records (lateral cephalogram and study model) were obtained when the remaining extraction space was 0.5 mm. This was done to avoid time delay between the extraction space closure and reporting of the participants. Results: Proportion of female participant was 80% in conventional arch wire group (Group A) and 70% in combination arch wire group (Group B) .With the help of Bivariate analysis, Chi- square value was observed to be 0.267 found with p value >0.05 which indicated no significant difference in gender distribution between two groups. Independent t- test showed significant reduction in canine distance at pre and post en mass retraction stage with both group. Paired t- test showed rate of retraction with combination arch wire group (0.94 mm/months) (Group B) faster than conventional arch wire group (0.89 mm/months) (Group A). There was no statistical significant difference in the retraction rate between two group. Conclusion: En mass retraction rate was faster with the use of combination arch wire when compared with conventional arch wire. In the combination arch wire group, lingual roll -in of molars was found. However, no statistical significance was found between both the groups. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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