Evaluation of the residual bone level around explanted implants: local and systemic risk factors

Assessment of the radiographic residual bone level around explanted implants and the influence of implant, prosthetic and systemic factors.

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

ISRCTN

Registry ID

ISRCTN10631004

Enrollment

494

Registered

2023-12-05

Start date

2022-03-14

Completion date

Unknown

Last updated

2025-09-08

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

Conditions

Radiographic bone level around explanted implants Oral Health

Interventions

This observational retrospective study analyzes retrospectively the radiographic data available in the files of patients treated in 13 dental clinics of a Swiss Dental Clinic Group (Ardentis Cliniques

history of periodontitis or not

type of prosthesis, etc.) will be obtained via t tests for normally distributed continuous variables, Wilcoxon tests for variables non-normally distributed continuous and chi-squar

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Data relating to adult patients with an explanted dental implant (osseointegrated and non-osseointegrated) between 1 January 2005 and 31 December 2021. 2. Radiographic data available in the file. 3. Reason for explantation available.

Exclusion criteria

Exclusion criteria: 1. Data relating to patients whose reason for explantation is unsure. 2. Incomplete data (radiographs unable to measure the entire implant or not usable due to exposure/distortion, etc). 3. Implants placed for orthodontic reasons or temporary implants. 4. Document attesting to a consent refusal.

Design outcomes

Primary

Measure	Time frame
Radiographic residual bone levels (mesured as percentage of the implant length) at the moment of explantation	—

Secondary

Measure	Time frame
Measured using patient records: 1. Implant position, demographic data (such as age) and life of the implant at the explantation. 2. Is implant loss associated with poor periodontal conditions (such as history or diagnosis of periodontitis, number of pockets, radiographic bone loss, bone loss/age ratio, scaling visits frequency)? 3. Is implant loss associated with poor prosthetic reconstructions (such as inadequate emergence angle, cantilever presence, number of implants, prosthetic misfit, type of antagonist)? 4. Is implant loss associated with medical conditions, drug intake and/or tobacco consumption? 5. Is implant loss associated with any of other analyzed factors? 6. Tendency of the number of explantations in the last 15 years	—

Measure

Time frame

Measured using patient records: 1. Implant position, demographic data (such as age) and life of the implant at the explantation. 2. Is implant loss associated with poor periodontal conditions (such as history or diagnosis of periodontitis, number of pockets, radiographic bone loss, bone loss/age ratio, scaling visits frequency)? 3. Is implant loss associated with poor prosthetic reconstructions (such as inadequate emergence angle, cantilever presence, number of implants, prosthetic misfit, type of antagonist)? 4. Is implant loss associated with medical conditions, drug intake and/or tobacco consumption? 5. Is implant loss associated with any of other analyzed factors? 6. Tendency of the number of explantations in the last 15 years

—

Countries

Switzerland

Contacts

Public ContactRodrigo Martin Cabezas

Rodrigo.Martin@etu.unige.ch+41 223794030

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026