Immediate Versus Delayed Implant Placement in the Esthetic Zone: A Systematic Review and Meta-Analysis

Abstract

Background: Immediate implant placement (IIP) after tooth extraction is increasingly used in the esthetic zone because it can reduce treatment time and facilitate immediate provisionalization. However, post-extraction remodeling, thin facial bone, soft-tissue phenotype and implant-positioning demands may increase esthetic risk. Delayed implant placement (DIP), often combined with ridge preservation, allows additional tissue healing and may be preferable in compromised sites.

Objective: To systematically review and synthesize evidence comparing immediate and delayed implant placement in the esthetic zone with respect to implant survival, marginal bone levels, peri-implant soft tissues, Pink Esthetic Score (PES), buccal bone dimensions, complications and patient-reported outcomes.

Methods: A PRISMA-oriented evidence synthesis was developed from contemporary systematic reviews, meta-analyses, randomized controlled trials and comparative studies. Comparative evidence was prioritized, and published quantitative estimates were used where outcomes and populations were sufficiently comparable.

Results: Contemporary evidence indicates high survival with both protocols. A 2022 systematic review/meta-analysis found no significant difference in implant survival between immediate and delayed placement, while bone-level and PES outcomes at 1 year favored immediate placement; immediate implants were also associated with more early and delayed complications. A 2024 review including 495 implants found no significant PES difference between immediate and delayed placement. A 2024 meta-analysis of six randomized trials comparing immediate and early placement found no significant differences in vertical midfacial soft-tissue change, PES, implant survival or marginal bone-level change, although heterogeneity and risk of bias were substantial. Long-term randomized evidence suggests that carefully selected immediate and delayed protocols can both maintain favorable hard- and soft-tissue outcomes.

Conclusion: Immediate implant placement can be predictable in carefully selected esthetic-zone cases but should not be considered universally superior to delayed placement. Socket-wall integrity, soft-tissue phenotype, infection control, primary stability, prosthetically driven positioning, regenerative needs and operator expertise should determine timing. Delayed placement remains an important strategy when these prerequisites are unfavorable.