The Study on the Accuracy of Peri-implant Probing and Related Influencing Factors

The Dental Hospital of Zhejiang University School of Medicine83 enrolled

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.

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.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Peri-Implantitis Diagnosis

Interventions

peri-implant probing before and after crown removalDIAGNOSTIC_TEST

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 same protocol.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 90 Years

Medical Language ↔ Plain English

Inclusion Criteria: 1. Age greater than 18 years. 2. The implant has completed osseointegration and has undergone final restoration for at least one month. 3. 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.

Locations (1)

The Affiliated Stomatology Hospital of Zhejiang University School of Medicine

Hangzhou, Zhejiang, China

RECRUITING

Outcomes

Primary Outcomes

probing depth

The PPDs at 6 site were measured as the distance from the mucosal margin to the base of the peri-implant pocket.

Time frame: On the day of enrollment

Secondary Outcomes

bleeding on probing

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.

Time frame: On the day of enrollment

Emergency angel

The emergence angle was calculated as the angle between the implant long axis and a line tangent to the restoration. The measurements were repeated twice, and the mean was calculated for each mesial and distal interproximal surface.

Time frame: The X-ray examination will be completed on the day of enrollment

Emergency profile

Emergence profile was categorized as either concave, straight or convex.

Time frame: The X-ray examination will be completed on the day of enrollment

Data from ClinicalTrials.gov

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