Over the past 5 decades, abdominal wall surgery has undergone a profound transformation. What was once considered a routine component of general surgery has evolved into a complex reconstructive discipline. The last 50 years have witnessed not only merely incremental technical modifications but also structural shifts that have redefined how surgeons understand, approach, and teach hernia repair and abdominal wall reconstruction. From the standardization of prosthetic reinforcement to the restoration of midline function, from minimally invasive access to the emergence of dedicated societies and training pathways, each milestone has helped reshape the field. This review highlights five transformative milestones that have defined modern abdominal wall surgery and established the foundations of its current practice. The introduction and subsequent standardization of synthetic prostheses represent one of the most consequential changes in the modern history of abdominal wall surgery 1, 2. Until the mid-twentieth century, hernia repair relied almost exclusively on tissue approximation under tension, with recurrence rates remaining high and variable depending on the technique employed 3. The earliest attempts at prosthetic reinforcement date back to the nineteenth century, when surgeons such as Witzel experimented with metallic materials, including silver, gold, and steel, with limited success due to rigidity, fragmentation, and adverse local reactions 4. The true turning point, however, occurred following the development of polypropylene by Giulio Natta and Karl Ziegler in the 1950s 5. In 1958, the use of monofilament polypropylene mesh for abdominal wall repair was described, seeking a material that was chemically inert, resistant to infection, and sufficiently flexible to accommodate abdominal wall motion 6. Although initial adoption was gradual, the consolidation of prosthetic reinforcement fundamentally changed surgical practice 2, 7. Hernias ceased to be viewed as defects requiring tensioned closure and came to be understood as structural weaknesses requiring reinforcement. This conceptual shift significantly reduced recurrence rates and allowed for greater standardization of outcomes across institutions and surgeons 3, 7. Over time, technological development refined the properties of synthetic meshes. Variations in weight, pore size, and composition were introduced to improve tissue integration and reduce complications such as chronic pain or infection 8. Composite meshes were subsequently developed for intraperitoneal use, incorporating anti-adhesive barriers that expanded surgical indications 9. Limitations observed in contaminated or infected settings stimulated the development of biologic materials derived from human or porcine acellular collagen matrices. Although these materials promote biological integration, their reduced mechanical strength has limited their systematic use compared with traditional synthetic prostheses 10. Despite ongoing debate and the continued search for the “ideal mesh,” polypropylene remains the most widely used material worldwide in hernia repair 2, 8. More than the introduction of a new material, this milestone represented a fundamental transformation of abdominal wall surgery toward a reinforced, reproducible repair model grounded in solid biomechanical principles. Inguinal hernias account for approximately 75% of all abdominal wall defects. The lifetime risk is estimated to range from 27% to 43% in men and from 3% to 6% in women. More than 20 million inguinal hernia repairs are performed annually worldwide, making it one of the most commonly performed surgical procedures globally 11. For more than a century, inguinal hernia repair relied on tissue-based techniques performed under tension. Following Edoardo Bassini's anatomical description in 1884 and the presentation of his repair in 1887, several modifications, including those of Halsted, McVay, and later Shouldice, sought to reinforce the posterior wall of the inguinal canal through anatomical reconstruction. Although these techniques represented major advances in their time, they shared a fundamental limitation: suture-line tension, particularly in patients with weakened tissues 4. Variable recurrence rates and prolonged postoperative pain stimulated the search for alternative strategies. Although polypropylene mesh had previously been described by Usher, its widespread adoption did not occur until the 1980s 6. In this context, the Lichtenstein Institute introduced the concept of “tension-free hernioplasty” in 1984. The technique developed by Irving Lichtenstein, consisted of the systematic placement of a flat polypropylene mesh over the inguinal defect, avoiding forced tissue approximation and eliminating tension as the cornerstone of repair 12, 13. The impact of this approach was substantial. It was technically straightforward, reproducible, feasible under local anesthesia, and associated with a relatively short learning curve. Tension-free repair demonstrated consistently low recurrence rates and a more predictable postoperative recovery compared with classical anatomical techniques 12, 14. Rapidly, the Lichtenstein repair became the preferred treatment in many developed countries and subsequently worldwide. Its broad adoption not only improved clinical outcomes but also transformed surgical education in hernia repair and laid the groundwork for the systematic implementation of ambulatory surgery 11, 14. The Lichtenstein technique represented more than a technical refinement; it marked a definitive shift away from tension-based repair and consolidated prosthetic reinforcement as the international standard for inguinal hernia management 11, 14. One of the most significant transformations in abdominal wall surgery was the recognition of the midline as a critical biomechanical structure essential to abdominal wall function 9. This conceptual evolution redefined the surgical objective in ventral and incisional hernia repair. In the pre-prosthetic era, fascial closure was performed under tension, which largely accounted for the high recurrence rates observed. With the introduction of synthetic meshes, surgeons started performing bridged repairs, in which the prosthesis replaced the defect without restoring anatomical continuity of the midline. Although this strategy addressed the immediate issue of tension, clinical experience revealed important limitations in terms of abdominal wall function, residual deformity, and long-term recurrence 15. The retromuscular approach provided the anatomical framework for a more physiological reconstruction 16, 17. Placement of the prosthesis in a well-vascularized plane, protected from the viscera and allowing wide overlap, enabled reinforcement of the defect while restoring fascial continuity under more favorable biomechanical conditions. This approach consolidated the concept that repair should aim not only to cover a defect but also to re-establish abdominal wall dynamics. The surgical objective consequently shifted toward functional restoration of the midline, recognized as the axis of force transmission between the two hemi-abdomens 9. The need to achieve primary fascial closure in progressively larger defects led to the development and refinement of progressive myofascial release techniques. Anterior component separation allowed controlled medial advancement of the rectus muscles, expanding reconstructive possibilities 18. Subsequently, posterior component separation with transversus abdominis release (TAR) provided an anatomically more favorable alternative, enabling substantial medial advancement with reduced cutaneous morbidity and improved prosthetic integration within the retromuscular plane 19. Accumulating evidence comparing fascial restoration with bridged repair further reinforced this paradigm, demonstrating improved outcomes in terms of recurrence, functional recovery, and quality of life when anatomical midline reconstruction was achieved 10, 15. This milestone represented the definitive transition toward function-oriented surgery. Midline restoration progressively emerged as the guiding principle of modern abdominal wall reconstruction and laid the foundation for subsequent advances in complex reconstructive techniques, including their adaptation to minimally invasive approaches. The introduction of laparoscopic surgery reshaped surgical practice across multiple specialties, and abdominal wall surgery was no exception. If the prosthetic era redefined the material of repair and midline restoration redefined the reconstructive objective, laparoscopy fundamentally altered surgical access. In the early 1990s, laparoscopic techniques for inguinal hernia repair—principally the transabdominal preperitoneal (TAPP) and totally extraperitoneal (TEP) approaches—introduced the possibility of reinforcing the preperitoneal space without large groin incisions 20, 21. This shift provided not only cosmetic advantages but also reduced wound-related morbidity and facilitated earlier functional recovery 22. Laparoscopy also offered a novel anatomical perspective of the myopectineal orifice, enhancing three-dimensional understanding of inguinal defects and promoting a systematic posterior approach to repair 20. In bilateral hernias and in recurrences following previous anterior open repair, the laparoscopic posterior approach demonstrated clinically meaningful advantages 22. The application of minimally invasive surgery to ventral and incisional hernias initially took the form of intraperitoneal onlay mesh repair (IPOM), which enabled laparoscopic placement of prostheses with wide overlap and lower rates of wound complications in selected settings compared with open surgery 23. Subsequently, the incorporation of laparoscopic fascial closure (IPOM-plus) sought to address the limitations of pure bridging repair, aligning this approach with the evolving paradigm of midline restoration 24. The natural progression of this strategy led to the development of endoscopic extraperitoneal techniques, such as the enhanced-view totally extraperitoneal (eTEP) approach, which translated the retromuscular plane into the minimally invasive environment, integrating classical reconstructive principles with advanced endoscopic access 25. Beyond immediate postoperative outcomes, laparoscopy reshaped patient expectations and health system pathways, contributing to enhanced recovery protocols and consolidating ambulatory surgery in an increasing proportion of cases 22. More recently, the incorporation of robotic platforms has further expanded the applicability of minimally invasive reconstruction, facilitating complex retromuscular dissections and posterior releases with improved ergonomics and precision. Although its long-term impact continues to be evaluated, robotic surgery represents a technological evolution consistent with the paradigm established by laparoscopy: minimizing abdominal wall trauma while preserving biomechanical integrity. The minimally invasive transformation was not merely a matter of smaller incisions; it represented a redefinition of surgical access, recovery pathways, and the overall patient experience in abdominal wall surgery. Abdominal wall surgery has evolved from a common component of general surgery into a highly specialized field characterized by increasing technical complexity, structured scientific development, and formalized advanced training pathways 26. This transformation did not result from a single innovation but from the cumulative effect of the clinical and technological milestones previously described. As reconstructive strategies expanded and clinical presentations became increasingly heterogeneous, ranging from small primary defects to hernias with massive loss of domain, the management of ventral and incisional hernias began to require advanced anatomical knowledge, mastery of multiple surgical planes, and individualized decision-making. Functional midline restoration and the adoption of complex minimally invasive techniques raised the technical threshold of routine practice 10. Growing complexity encouraged the concentration of expertise in high-volume centers and progressively differentiated abdominal wall reconstruction as a distinct area within surgical practice 27. The establishment of dedicated scientific societies, such as the European Hernia Society (1979) and the American Hernia Society (1997), provided structured platforms for international collaboration, continuing education, and consensus development. The launch of the peer-reviewed journal Hernia in 1997 marked a milestone in academic maturation by offering a dedicated forum focused exclusively on hernia and abdominal wall pathology. Institutional organization enabled scientific standardization. Structured classification systems were developed for inguinal, primary ventral, incisional, and lateral hernias, establishing a common language that facilitated outcome comparison and multicenter study design 28, 29. The implementation of registries and databases strengthened a culture of outcome assessment and benchmarking 30. Subsequently, evidence-based guidelines and consensus statements progressively defined standards of practice across the full spectrum of abdominal wall pathology 11, 28. The emergence of high-volume specialized centers and formal fellowship programs further consolidated the educational dimension of the field 27. Dedicated training pathways in abdominal wall surgery have expanded internationally, reflecting the recognition that complex reconstruction requires focused mentorship, case concentration, and reproducible technical frameworks. Collectively, these developments demonstrate that abdominal wall surgery has acquired the defining characteristics of a surgical subspecialty: a distinct body of knowledge, dedicated scientific institutions, standardized classification systems and guidelines, systematic outcome evaluation, and structured advanced training. What was once considered a routine procedure within general surgery has evolved into a specialized reconstructive discipline with its own academic and scientific identity. The evolution of abdominal wall surgery over the past 50 years reflects more than technical refinement; it represents a progressive redefinition of surgical philosophy. The transition from tension-based repair to systematic prosthetic reinforcement, the prioritization of midline restoration, the expansion of minimally invasive approaches, and the consolidation of an academic and institutional framework collectively transformed a once routine operation into a highly specialized reconstructive discipline. These milestones illustrate how innovation in surgery is rarely the result of a single breakthrough. Rather, it emerges from the interaction between material science, anatomical insight, technological development, and collaborative scientific effort. As abdominal wall surgery continues to evolve, its future will likely be shaped by the same dynamic forces that defined its recent past. German Ernesto Cabrera Bustamante: writing – original draft. Victoria Gabriela Hughes: writing – original draft. Sebastian Roche: writing – original draft. Santiago Bertone: writing – original draft. The authors have nothing to report. The authors declare no conflicts of interest. The data that support the findings of this study are available from the corresponding author upon reasonable request.
Bustamante et al. (Thu,) studied this question.