2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129010We use the Ozsváth-Szabó contact invariants to distinguish between tight contact structures obtained by Legendrian surgeries on stabilized Legendrian links in tight contact 3-manifolds. We also discuss the implication of our result on the tight contact structures on the Brieskon homology spheres $-Σ(2,3,6n-1)$.18 pages, 1 figure. Seventh version: deleted a citation of a wrong result by Jin-Hong Kim; Sixth version: added detailed proofs for Lemmas 3.4 and 4.2, corrected mistakes and typosGeometric TopologySymplectic Geometry57M50, 53D10text