• What medical field or topic is the Vuvi study related to? (e.g., cardiology, oncology, infectious disease, a specific drug or procedure)
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• Is the spelling definitely "Vuvi"? It's possible it could be an acronym (like VUVI), a trial abbreviation, or perhaps a different spelling (e.g., VIVI, VIVO, VUVIY, etc.)

1. What medical topic is this VIVO study about? (e.g., a specific disease, drug, or procedure)
2. Where did you encounter it? (e.g., a lecture, textbook chapter, journal article, exam prep)

Vibrating Devices and Orthodontic Tooth Movement - Research Summary

What Are Vibrating Devices?

Key Studies and Evidence

1. Cochrane Systematic Review (El-Angbawi et al., 2015) - PMID 26576758

• Design: Cochrane Review of RCTs
• Devices studied: Tooth Masseuse (111 Hz, 0.06 N) and OrthoAccel (30 Hz, 0.25 N), 20 min/day
• Findings:
  • Tooth Masseuse: slightly greater reduction in lower incisor irregularity (MD 0.6 mm) over 10 weeks - not clinically significant
  • OrthoAccel: suggested ~50% faster canine distalisation, but absolute differences were marginal and not clinically important
• Conclusion: Both included studies were at high risk of bias. Evidence was insufficient to support vibrating devices for accelerating tooth movement.

2. Systematic Review & Meta-Analysis (Elmotaleb et al., 2019) - PMID 30923687

• Design: Systematic review + meta-analysis of 7 RCTs/CCTs (105 vibration patients vs. 127 controls/sham)
• Conclusion: No significant difference between vibrating device group and control group. No evidence that vibrating appliances accelerate orthodontic tooth movement.

3. Systematic Review of Systematic Reviews (Yi et al., 2017) - PMID 28301678

• Reviewed multiple systematic reviews on adjunctive interventions
• Vibration was among the interventions with inconclusive or no benefit for accelerating orthodontic tooth movement

4. Effects of Vibration - In Vivo & Clinical Review (PMC11353850, 2024)

• Reviewed both in vivo (animal) and clinical studies on low vs. high frequency vibration
• Low frequency (≤30 Hz): Did not accelerate tooth movement in aligners or fixed appliances
• High frequency (60-120 Hz): Showed promising results - stimulated bone biomarkers, facilitated alveolar bone remodeling, and increased aligner change rate and space closure
• In vivo (animal) studies: Most showed no positive outcomes; one study found vibration may improve tooth movement during the catabolic phase of treatment
• Conclusion: High-frequency vibration shows promise, but studies have small sample sizes and conflicting results; further research needed

Summary Table

Bottom Line

Note: If you are referring to a specific article called the "VIVO study" by name, it may be a proprietary or institutional study name not indexed on PubMed. Please share the author names or journal title if you have them, and I can locate it precisely.

High-Frequency Vibration & Orthodontic Tooth Movement - Key Studies

1. Network Meta-Analysis (Lalitwageewong et al., 2025) - Highest Level Evidence

• Design: Systematic review + network meta-analysis of 10 RCTs, 5 different vibration frequencies compared
• Frequencies ranked (Surface Under Cumulative Ranking Curve - SUCRA):
  1. 125 Hz - most effective
  2. 100 Hz
  3. 60 Hz
  4. 30 Hz
  5. 0 Hz (control)
• Pairwise meta-analysis result: Vibration significantly increased tooth movement overall (MD = +0.084 mm, 95% CI: 0.004-0.164)
• Key finding: Higher frequencies showed a consistent tendency for better acceleration, with 125 Hz ranking highest
• Caveat: Network meta-analysis showed no statistically significant differences between individual frequencies; evidence quality was low-to-moderate
• Bottom line: Statistically significant but the effect size is not yet clinically meaningful enough to reduce overall treatment duration

2. RCT - En-Masse Retraction (Dutta & Patil, 2026) - Most Recent Clinical Trial

• Design: Double-blind RCT, 20 adults aged 18-25 years
• Protocol: 120 Hz, 0.0003 N, 5 min/day with mini-implant anchorage and NiTi closed coil springs
• Results over 4 months:
  • Maxillary retraction: 3.97 mm (HFV) vs. 2.75 mm (control) - difference of +1.22 mm (P <0.001)
  • Mandibular retraction: 3.76 mm (HFV) vs. 2.64 mm (control) - difference of +1.12 mm (P <0.001)
  • Pain at 24 hours was significantly reduced in the HFV group (P = 0.027)
  • Anchorage was maintained; compliance >92%
• Bottom line: 120 Hz HFV significantly increased retraction rate AND reduced pain, with no adverse effects. The authors note the magnitude may not translate to a clinically significant reduction in total treatment duration.

3. Clear Aligner + HFV Study (Shipley, Farouk & El-Bialy, 2019)

• Design: 30 patients (Class I, mild-moderate crowding), clear aligners ± HFV
• Protocol: Patients changed aligners as soon as they felt loose
• Results:
  • Average aligner change interval: 5.2 days (HFV) vs. 8.7 days (control) (P = 0.0001)
  • Bone density (Hounsfield Units on CBCT): significantly increased in both upper and lower arches in HFV group at retention
  • Control group showed no significant change in bone density
• Bottom line: HFV adjunctive to aligners allowed ~40% faster aligner changes AND improved bone density at retention - a major finding

4. Vibration Paradox Study - Mechanistic (Alikhani et al., 2018)

• Design: Animal study (rats) examining the biological mechanism of High-Frequency Acceleration (HFA)
• Key discovery - "The Vibration Paradox":
  • Without orthodontic force: HFA is anabolic - builds bone, increases density
  • During orthodontic tooth movement: HFA is catabolic - enhances inflammation, increases osteoclastogenesis and inflammatory mediators, decreases alveolar bone density - which accelerates tooth movement
  • After forces are removed: HFA can be switched back to anabolic mode to enhance retention
• PDL-dependent: The effect requires an intact periodontal ligament
• Bottom line: This study explains WHY high-frequency vibration works - it amplifies the inflammation-dependent catabolic cascade that drives tooth movement

Summary Table

Clinical Takeaway