Background <p>Facial aging is a complex and multifactorial process that progressively affects the structure, volume, and quality of facial tissues. This study aims to present a case series involving South American patients of different generations and facial morphotypes treated with HArmonyCa®, a hybrid filler composed of hyaluronic acid and calcium hydroxylapatite.</p> Methods <p>Four patients of varying ages, genders, and facial profiles underwent individualized treatment plans tailored to their aesthetic concerns and aging patterns. All patients received clinical evaluation and three-dimensional imaging analysis using the Vectra 3D system, which enabled precise quantitative assessment of outcomes.</p> Results <p>Significant improvement in facial firmness and contour definition was observed, yielding a rejuvenated, natural-looking appearance. The bio-stimulatory effects of calcium hydroxylapatite, combined with the immediate volumization from hyaluronic acid, produced a noticeable and progressive lifting effect. Three-dimensional imaging supported the clinical findings by demonstrating tissue repositioning and volumetric enhancement in strategic facial areas.</p> Conclusion <p>This case series highlights the potential of HArmonyCa® as an effective, safe, and versatile approach for facial rejuvenation, adaptable to a wide range of patient profiles. The integration of objective tools such as 3D imaging further enhances treatment planning and outcome evaluation.</p> Level of Evidence IV <p>This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors <a href="http://www.springer.com/00266">www.springer.com/00266</a>.</p>