Study on the relationship between the stability of orthodontic anchor screws, tooth mobility, and the distance to tooth roots

A study investigating the relationship between changes in tooth mobility before and after anchor screw placement, anchor screw failure rates, and the distance between the anchor screw and the tooth root - Anchor Screw & Root Distance

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000060104

Enrollment

100

Registered

2025-12-18

Start date

2025-12-18

Completion date

Unknown

Last updated

2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Malocclusion

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Inpatient/Outpatient at the research implementation facility

Exclusion criteria

Exclusion criteria: * Uncontrolled severe systemic diseases * Uncontrolled bleeding disorders * Patients with drug, alcohol, or nicotine addiction * Long-term treatment-resistant functional impairment * Xerostomia * Opportunistic immunodeficiency and leukocyte dysfunction * Diseases requiring regular steroid administration * Uncontrolled endocrine diseases * Patients with hypersensitivity to pure titanium or titanium alloys * Patients with impaired wound healing function * Patients receiving bisphosphonates * Patients with poor general condition * Patients with lesions such as inflammation, tumors, cysts, or trauma at or around the implantation site

Design outcomes

Primary

Measure	Time frame
Tooth mobility, Failure rate of orthodontic anchor screws, Distance between the orthodontic anchor screw and the tooth root	—

Secondary

Measure	Time frame
Insertion torque of orthodontic anchor screws, Oral diseases, Maxillofacial morphology	—

Countries

Japan

Contacts

Public ContactYOSHIKO HIRANO

Kagoshima University Hospital Orthodontics

k9956605@kadai.jp099-275-6252

Outcome results