Optimal asymmetric thread for orthodontic microimplants: Laboratory and clinical evaluation.
| Autor: | Alrbata RH; a Former Research Assistant, Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Korea., Ha DW; b Orthodontist, Mir Dental Hospital, Daegu, Korea., Yu W; c Associate Professor, Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Korea., Kyung HM; d Professor, Department of Orthodontics, School of Dentistry, Kyungpook National University, Daegu, Korea. |
|---|---|
| Jazyk: | angličtina |
| Zdroj: | The Angle orthodontist [Angle Orthod] 2015 Jul; Vol. 85 (4), pp. 585-90. Date of Electronic Publication: 2014 Oct 06. |
| DOI: | 10.2319/050314-320.1 |
| Abstrakt: | Objectives: To investigate the performance of microimplants incorporating a newly designed asymmetric thread. Materials and Methods: Three microimplants were compared. The control group comprised microimplants with the original v-shaped thread. The two experimental groups (Taper 1.0 and Taper 1.25) comprised prototype microimplants constructed with the new asymmetric thread; the Taper 1.25 specimens had a 1.25-mm-long and sharper tip, while the Taper 1.0 and control groups had a less sharp 1-mm tip. Two specially designed artificial bone blocks mimicking soft (maxillary) and hard (mandibular) bone were used to evaluate the microimplant insertion characteristics and postinsertion lateral stability. The peak insertion torque, insertion time, Periotest value (PTV), and torsional strength were measured. Then the microimplants were evaluated clinically over a 3-month period. Results: Significant differences in peak insertion torque, insertion time, and PTV were observed and favored the experimental groups. Although statistically insignificant, the clinical success rate was also higher in the Taper 1.25 experimental group than in the control group (87.2% vs 75.6%). Conclusions: The better performances of the experimental microimplant, under both laboratory and clinical conditions (although statistically insignificant in the latter), demonstrate the superiority of the new asymmetric thread. |
| Databáze: | MEDLINE |
| Externí odkaz: |
|