This study aims to conduct a cross-sectional study to compare the differences in clinical indices, patient-reported outcomes, and levels of inflammatory factors in peri-implant gingival crevicular fluid between sites with adequate (≥ 2 mm) and inadequate (\< 2 mm) keratinized mucosa after implant restoration, in order to explore the impact of the presence of keratinized mucosa on peri-implant soft and hard tissue health.
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Width of Keratinized Mucosa, KMW
Timeframe: on the day of enrollment
Plaque Index(PI)
Timeframe: on the day of enrollment
Bleeding on Probing(BOP)
Timeframe: on the day of enrollment
Peri-implant Probing Depth(PPD)
Timeframe: on the day of enrollment
Marginal Bone Loss(MBL)
Timeframe: The X-ray examination will be completed on the day of enrollment
Patient Satisfaction
Timeframe: on the day of enrollment
Immunological parameters in peri-implant crevicular fluids(PICF)
Timeframe: The PICF will be collected on the day of enrollment