The capacity for immediate loading hinges on primary stability, which is influenced by bone quality and sufficiency, operative technique, and implant microgeometry. Implants featuring a conical architecture with decompression chambers (Implantes Maestro Implacil de Bortoli − São Paulo, SP, Brazil), designed to enlarge the bone–implant interface and diminish insertion resistance while safeguarding primary stability, were examined. This cross-sectional clinical study sought to quantify the primary stability of 73 implants under immediate loading and relate this measure to implant width and length. 21 individuals were enrolled based on clinical criteria and cone beam computed tomography scans. Implants were seated to a final torque ceiling of 35 N cm, with the value documented at the termination of fixture placement. Statistical treatment comprised Spearman’s rank correlation and the Mann–Whitney U test, both at a 5% significance threshold. Mean torque reached 51.51 N cm for implants measuring 3.5 mm in diameter and 59.50 N cm for those of 4.0 mm. This difference reached statistical significance, favoring the wider implants (P = 0.03). Variation in primary stability as a function of implant length did not attain statistical significance (P = 0.373). Broader-diameter implants are inclined to deliver enhanced primary stability; when sub-instrumented, every implant exhibited mean primary stability adequate for immediate loading.
