This study quantitatively compared cement residues of two resin cement types around implant-supported restorations (ISR) with a crown-abutment margin located at the gingival level. This prospective, single-blinded, cross-over clinical trial compared optically detectable cement remnants between Self-Adhesive Resin Cement (RC) and Resin-Modified Glass Ionomer Cement (RMGIC).

This prospective, two-arm, non-randomized, clinical trial compared detectable cement remnants on 30 patients and 60 ISR. Two cements were compared; self-adhesive resin (RC) and resin-modified glass ionomer (RMGIC). Comparisons were carried out on identical pairs of ISR tested within the same patients with a 1-week healing interval. The primary outcome variable was the ratio of cement-covered area to total crown area. Areas were analyzed ex-situ by standardized digital image analysis.

Inclusion Criteria:

• physical and psychological ability to undergo implant therapy (ASA I or II)
• presence of a single mandibular molar indicated for extraction with adjacent healthy and present natural teeth or implant-supported restoration
• presence of ≥ 6 mm width and ≥ 10 mm height native bone ridge - presence of intact alveolar bone walls after tooth extraction and presence of interradicular bone > 4 mm to achieve primary implant stability
• presence of ≥ 1.5 mm distance to adjacent teeth at the bone level
• overall healthy, non-inflamed keratinized soft tissues.

Exclusion Criteria:

Presence of general conditions contributory to dental implant treatment comprising but not limited to:

• presence of active periodontitis 25
• poor oral hygiene as determined by the Oral Health Index (OHI)
• pregnant or lactating
• presence of uncontrolled medical systemic conditions, e.g. diabetes;
• ongoing or past medical treatments affecting wound healing, terminated less than 3 months prior to the study-related intervention