The Study on the Accuracy of Peri-implant Probing and Related Influencing Factors
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: peri-implant probing before and after crown removal.
- Who it may be relevant to
- Registry conditions: Peri-Implantitis, Diagnosis. Basic parameters: 18 years — 90 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- China
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Overview
The aim of the diagnostic accuracy study was to compare the diagnostic accuracy of probing depth before (PPD-1) and following (PPD-2) the removal of prothesis in identifying the presence of peri-implantitis and assess the factors influencing peri-implant probing.
Detailed description
This study aims to design a diagnostic accuracy study to compare the peri-implant probing depth and bleeding on probing before and after crown removal. It will explore the impact of prosthetic design on the accuracy of peri-implant probing and its diagnostic accuracy, and provide clinical recommendations on whether the prosthesis should be removed prior to peri-implant probing.
Interventions
- Diagnostic test peri-implant probing before and after crown removal
Before removal of the prosthetic reconstruction: * Measurement of PPD-1: The PPDs at 6 site were measured as the distance from the mucosal margin to the base of the peri-implant pocket. * Measurement of BOP-1：Bleeding sites after gentle probing within 15s were recorded as BOP scores. A positive score (1 point) was recorded if bleeding was observed during either of probing assessment by two researchers. After removal of the prosthetic reconstruction, PPD-2 and BOP-2 were recorded following the
Primary outcome measures
- probing depth [Time frame: On the day of enrollment]
Secondary outcome measures (3)
- bleeding on probing [Time frame: On the day of enrollment]
- Emergency angel [Time frame: The X-ray examination will be completed on the day of enrollment]
- Emergency profile [Time frame: The X-ray examination will be completed on the day of enrollment]
Eligibility criteria
Inclusion criteria
- Age greater than 18 years.
- The implant has completed osseointegration and has undergone final restoration for at least one month.
- The final restoration needs to be removed or retrieved for various reasons.
Exclusion criteria
- Patients with serious systemic diseases, severe intraoral infections, severe mental disorders, pregnancy/lactation in women, or other conditions that make oral treatment operations unsuitable.
- History of crown removal or re-restoration within the past month prior to the visit.
- The prosthesis has fallen off or is severely damaged and has lost its original form before the visit.
- The prosthesis cannot be completely removed.
- Refusal to participate in this study.
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Observational model
- Other
Study locations
China · 1 center
- The Affiliated Stomatology Hospital of Zhejiang University School of Medicine — Hangzhou
Publications
- Xu M, Bao S, Qian Y, Qiu C, Zhang J, Si M. Diagnostic Accuracy of Peri-Implant Probing With or Without Prostheses in Detecting Peri-Implantitis. Clin Oral Implants Res. 2026 May;37(5):612-622. doi: 10.1111/clr.70104. Epub 2026 Feb 18. PMID 41708887
Identifiers
NCT: NCT07004517 · 2019-51