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Long-Term Changes in Marginal Bone Level Following Guided vs. Freehand Implant Placement: A Retrospective Cohort Study

Long-Term Changes in Marginal Bone Level Following Guided vs. Freehand Implant Placement: A Retrospective Cohort Study

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
CRIS
Registry ID
KCT0011901
Enrollment
253
Registered
2026-04-23
Start date
2026-02-28
Completion date
Unknown
Last updated
2026-04-27

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

Conditions

None listed

Interventions

None listed

Sponsors

Seoul National University Dental Hospital
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Bone-level, internal-connection implants (TSIII; Osstem Implant, Seoul, Korea). 2. Availability of standardized periapical radiographs at baseline and at least 12 months after prosthetic loading. 3. All guided implant placements performed exclusively using a digital guide system (OneGuide, Osstem Implant, Seoul, Korea).

Exclusion criteria

Exclusion criteria: 1. Early implant failure before prosthetic loading. 2. Incomplete radiographic or clinical records preventing assessment of baseline or longitudinal outcomes. 3. Periapical or panoramic radiographs of insufficient quality for calibration or for identification of the implant platform and first bone-to-implant contact were excluded.

Design outcomes

Primary

MeasureTime frame
Baseline marginal bone level and longitudinal marginal bone level change—

Secondary

MeasureTime frame
Peri-implant disease prevalence;Abutment height, emergence angle, and emergence profile—

Countries

Korea, Republic of

Contacts

Public ContactJungwon Lee

Seoul National University Dental Hospital

jungwonlee.snudh@gmail.com+82-2-6256-3318

Outcome results

None listed

Source: CRIS (via WHO ICTRP) · Data processed: May 1, 2026