The story of anterior cruciate ligament reconstruction.
|Abstract:||Once upon a time the anterior cruciate ligament (ACL) enjoyed a relatively unchartered existence, when only a fall from a jousting horse or chariot might have sent a knight or gladiator into early retirement due to an unstable knee. In today's world of high speed travel and an ever increasing number of sports enthusiasts, injuries of the ACL are almost common place with a yearly incidence of about 35 per 100,000 of the population. Although we have known about the existence of the cruciate ligaments since they were first described by Galen over 2000 years ago, awareness of their function and the consequences of their loss were not appreciated until much later. Robert Adams observed the first clinical case of an ACL tear in 1837 but treatment in those days was largely conservative and surgery was reserved for life threatening conditions as mortality was high. The first ACL repair was performed in 1895 by Mayo-Robson of Leeds and was followed by Grekow and Hey Groves who initiated ACL reconstruction with autologous tissue between 1914 and 1920, almost as we know it today.|
Anterior cruciate ligament
(Discovery and exploration)
Anterior cruciate ligament (Physiological aspects)
Anterior cruciate ligament (Injuries)
Orthopedic surgery (History)
Orthopedic surgery (Practice)
|Author:||Schindler, Oliver S.|
|Publication:||Name: Journal of Perioperative Practice Publisher: Association for Perioperative Practice Audience: Academic Format: Magazine/Journal Subject: Health; Health care industry Copyright: COPYRIGHT 2012 Association for Perioperative Practice ISSN: 1750-4589|
|Issue:||Date: April, 2012 Source Volume: 22 Source Issue: 4|
|Topic:||Event Code: 200 Management dynamics|
The knowledge and achievement of these early pioneers however was
not uniformly appreciated at the time. Over the following 50 years
surgeons experimented with a variety of different tissue grafts
including synthetic materials. During this period surgical ingenuity and
dissatisfaction with available techniques created a barrage of intra-
and extra-articular procedures, some of which disappeared even before
clinical results were publicised. Improved understanding of kinematics
and biomechanics combined with a better appreciation of spatial
arrangement and functional behaviour of the various ACL bundles created
the platform for modern ACL surgery in the latter part of the 20th
century. The concept of anatomic graft placement and double-bundle
reconstruction are two of the most promising developments which aim to
improve knee kinematics and to reduce the prevalence of post-surgical
arthritis. Advancements in arthroscopy and instrumentation have allowed
for greater surgical reliability and reproducibility and firmly
established ACL reconstruction as one of the most successful procedures
in orthopaedic surgery.
This is the first part of a two part article on The story of anterior cruciate ligament reconstruction. It is concerned with the historical developments surrounding the ligament's discovery, the acknowledgement of its function and the appreciation of the detrimental effects once it becomes damaged. It also describes the efforts of the early pioneers who recognised the need to re-establish ligament function by ways of ligament repair or reconstruction with autologous tissue. The second part will be presented in the next issue of the journal and will explore the surgeons' quest to find the ideal graft material by experimenting with various synthetic materials, as well as those derived from animals (xenografts) and other human beings (allografts). It will look at attempts to stabilise an unstable knee by means of extra-articular reinforcements which were popular until not too long ago and review the developments of the various graft fixation methods available today. Furthermore it will evaluate the influence of arthroscopy which revolutionised not just the procedure of ACL reconstruction, and place particular focus on new developments including double bundle techniques and mapping of the ligaments anatomic foot print.
From Galen to the 19th century
Although the cruciate ligaments owe their name to the Greek physician Galen of Pergamon (131-201 BC), they received little attention in the scientific world until the 19th century (Galen 1968) (Figure 1). In 1836 the German scientists Wilhelm (1806-1871) and Eduard Weber (1804-1891) not only described the exact anatomic location of the cruciate ligaments but also discovered that the anterior cruciate (ACL) was made-up of two distinct fibre bundles (Weber & Weber 1836) (Figures 2 & 3). Through experiments they further discovered that cutting of the ACL would lead to abnormal knee movement, allowing the tibia to move forward on the femur, a phenomenon which became known as anterior draw.
[FIGURE 1 OMITTED]
[FIGURE 2 OMITTED]
[FIGURE 3 OMITTED]
The first clinical presentation of an ACL injury in the English literature was provided by the Irish physician Robert Adams (1791-1875) (Adams 1847) (Figure 4). In 1837 he observed the case of a 25 year old male who injured his knee when he got into a brawl after leaving a pub. For some reason the knee became septic and the patient died. Out of curiosity Adams opened the knee and discovered that the ACL attachment had torn off the tibia.
[FIGURE 4 OMITTED]
The French surgeon Amedee Bonnet (1809-1858) first described the three clinical signs of acute ACL rupture in 1845: 'In patients who have not suffered a fracture, a snapping noise, haemarthrosis, and loss of function are characteristic of ligamentous injury in the knee' (Bonnet 1845) (Figure 5). Bonnet preferred conservative management for those injuries and advocated the application of cold packs in the acute stage. Through his own experiments he was aware of the detrimental effects of prolonged immobilisation on articular cartilage and hence encouraged early motion exercises using a sliding frame and an exercise apparatus (Bonnet 1853) (Figure 5). For patients who continued to suffer from instability he suggested wearing of a long-leg hinged brace not dissimilar in principle to modern stabilising braces. Although Bonnet's ideas and suggestions on the treatment of acute ACL injuries were ahead of his time they received little recognition outside his home country.
[FIGURE 5 OMITTED]
In 1850 the Scottish GP James Stark (1811-1890) published two cases of cruciate tears, describing the problem of knee instability patients commonly affected by,' ... and felt something gave way with a snap in the left knee; when raised, she found she had lost all command over the leg' (Stark 1850). He was followed by the Greek physician Georgios Noulis (1849-1915) who in 1875 realised that the excessive mobility of the tibia following ACL rupture was most noticeable when the leg was near full extension (Noulis 1875). Almost 100 years later this phenomenon and its association with ACL deficiency was rediscovered by the US surgeons Ritchie and Torg and utilised in the creation of the Lachman test. The test, which was dedicated to John Lachman of Philadelphia, has since become one of the most popular clinical manoeuvres in the assessment of ACL integrity (Ritchey 1960, Torg et al 1976).
Experimenting on human cadavers in the late 19th century helped clinicians to understand the impact that extremes of movement might exert on the ACL. The Viennese Leopold Dittel (1815-1898) observed that the ACL either tore close to its femoral insertion, or avulsed with a fragment of bone of the tibia (Dittel 1876). Dittel also noted the common association between tearing of the ACL, medial collateral ligament (MCL) and medial meniscus, a pattern of injury, which in the 1950s became known as the 'Unhappy Triad of O'Donoghue' (O'Donoghue 1950) (Figure 6).
[FIGURE 6 OMITTED]
The French surgeon Paul Segond (1851-1912) summed-up the key physical signs associated with ACL injuries in 1876 as 'strong articular pain, frequent accompanying pop, rapid joint effusion and abnormal anterior-posterior movement of the knee on clinical examinations' (Segond 1879). Segond also described the so-called 'Segond Fracture', a small bony avulsion on the lateral tibial plateau, commonly associated with an ACL tear.
In the intervening years before the First World War, a number of famous anatomists and physiologist further advanced our knowledge on the importance of the functional unit of ACL and PCL in providing normal rolling, gliding and sliding motion of femur on tibia. Clinicians gradually became aware that any disturbance of this unit would disrupt this mechanism, and create un-physiological movement patterns likely to lead to joint degeneration (Meyer 1853, Zuppinger 1904, Fick 1911, Strasser 1917).
Direct ligament repair
In the 19th and early 20th century clinicians showed general reluctance to consider surgery for cruciate ligament injuries as both morbidity and mortality associated with surgery was high and in the absence of anti microbial agents, joint sepsis was commonly encountered. Sir Arthur Mayo-Robson of Leeds (1853-1933) was bold enough to become the first surgeon to repair a torn
ACL in a 41 year old miner in 1897 (Mayo-Robson 1903) (Figure 7). He was followed by William Battle who performed a similar procedure in 1899 although his publication predates that of Mayo-Robson's (Battle 1900). Following surgery, knees were commonly immobilised in a Plaster of Paris for up to 12 weeks and it was hence not surprising that they often failed to regain a full range of motion. Critics like MacGuire of New York believed that surgical repair 'could not give any benefit other than that derived from the period of immobilisation following operation' (MacGuire 1926).
[FIGURE 7 OMITTED]
By 1913 Hubert Goetjes of Cologne was able to trace a total of 30 cases of ACL rupture in the available scientific literature most of which were still treated conservatively (Goetjes 1913). He recognised the problems of chronic instability associated with conservative management and hence recommended suture repair of the torn ligament. He was also the first surgeon to suggest examination under anaesthesia when the clinical diagnosis was uncertain.
Repairing a torn ligament in the centre of the knee posed difficulties to most surgeons and results were often unpredictable. In 1926 Georg Perthes of Tubingen (1869-1927), better known for his description of femoral head necrosis in children, suggested a new repair method which became the standard technique worldwide (Perthes 1926) (Figure 8). Perthes attached a wire suture to the ligament which he pulled through drill holes in the femur and secured by twisting the wire across a bony bridge. Perthes believed in early intervention and was critical of his colleagues who only considered ACL repair once conservative management had failed.
[FIGURE 8 OMITTED]
Erwin Payr of Leipzig (1861-1946) offered a variation to trans-articular suture fixation by using a fascia strip looped through a small hole in the intercondylar notch and tied to the ACL remnant (Payr 1927).
ACL repair received a massive boost in the US in the 1950s through Don O'Donoghue of Oklahoma (1901-1992) who published his experience in the treatment of athletes (O'Donoghue 1955) (Figure 9). Long-term results of ACL repair however did not become available until the 1970s and were generally disappointing and overshadowed by good results achieved with emerging techniques of ligament reconstruction (Feagin & Curl 1976, Engebretsen et al 1990). Subsequently intra-articular ligament repair was abandoned by most clinicians by the end of the 1980s.
[FIGURE 9 OMITTED]
ACL reconstruction with autologous tissue
Although it is not entirely clear who performed the first ACL reconstruction, the first publication on the subject appeared in 1914. Ivan Grekov (1867-1934) a surgeon from St Petersburg encountered a 40 year old man who had dislocated his knee and torn his ACL. Grekov utilised a free strip of liliotibial band (ITB) which he placed through a drill hole in the femur and connected to the ACL remnant with apparently good results. Around the same time Max zur Verth of Hamburg also experimented with ITB for replacing the torn ACL, but no formal report of his technique exists (Holzel 1917).
The first properly documented reconstruction is credited to Ernest Hey Groves of Bristol (1872-1944), who in 1917 used the entire ITB, which he detached from Gerdy's tubercle, passed through tunnels in femur and tibia and sewed to the periosteum of the tibia (Hey Groves 1917) (Figure 10). Hey Groves believed that by leaving the tendon attached to the muscle belly, blood supply and nutrition to the tendon would be maintained. Hey Groves was already aware that proper knee joint function could only be re-established if the reconstructed ligament graft was placed in the exact anatomic position of the original ACL 'in contradistinction to a mere passage of new ligaments across the joint' (Hey Groves 1920). He also anticipated the importance of oblique graft placement to improve rotational stability, a fact which took over 80 years to be widely recognised (Loh et al 2003). Hey-Groves made a particular point of describing the anteriorlateral subluxation of the tibia, a phenomenon which was later used by MacIntosh & Galway to devise the pivot-shift-test, a sensitive diagnostic assessment tool to identify ACL incompetence (Galway et al 1972).
[FIGURE 10 OMITTED]
In 1918 the Welsh surgeon Alwyn Smith (1884-1931) proposed a modification to the Hey Groves technique, using only a section of the ITB which he detached from its muscle belly, pulled through femoral and tibial tunnels and placed over the medial joint space to reinforce the MCL (Smith 1918). Hey Groves later adopted Smith's variation on his earlier technique but dropped the medial re-enforcement, thereby creating an operation very similar to modern ACL reconstruction (Hey Groves 1920) (Figure 11). ACL surgeries in first half of the 20th century were challenging procedures which, in the words of Sir Robert Jones 'are usually grave and require the highest craftsmanship, and should never be undertaken without a sense of grave responsibility' (Jones & Lovett 1923).
[FIGURE 11 OMITTED]
Although ITB remained a popular choice as ACL graft until the end of the 20th century (Insall 1981), surgeons started to experiment with many other autologous tissues, namely patellar, quadriceps and hamstring tendons as well as meniscus and cutis (Holzel 1917, Wittek 1927, Anderson 1956, Blauth 1984). In 1917 Max zur Verth replaced the ACL of a soldier with the torn lateral meniscus (Holzel 1917). Meniscus was often seen as a disposable structure which if torn was commonly removed. It hence appeared logical to utilise it as suitable graft material (Wittek 1927, Niederecker 1957, Tillberg 1977) (Figure 12). Knowledge of the importance of the meniscus and the consequences of its removal eventually prompted a shift in opinion and meniscus was virtually abandoned as graft material by the end of the 1970s (Fairbank 1948, Walsh 1972, Maletius & Messner 1996).
[FIGURE 12 OMITTED]
The use of patellar tendon to replace the ACL was first entertained by the American Mitchell Langworthy (1891-1929), who unfortunately never published on his method and sadly suffered an untimely death when he became the victim of a bullet from an unhappy patient in his private practice in 1929 (Eikenbary 1927). Four years later zur Verth reported on the successful treatment of chronic ACL-deficient knees with a strip of the patellar tendon he had left attached to the tibial tubercle (zur Verth 1933). Wittek of Graz used the 'Zur Verth Technique' in the following years and expressed satisfaction with the patients' clinical performance (Wittek 1935). In 1936 Willis Campbell of Memphis (1880-1941) published his operative guide to ACL surgery and coined the term 'giving way', in describing the distressing sign of knee instability (Campbell 1936) (Figure 13). As ACL graft he utilised a combination of extensor retinaculum and patellar tendon (Figure 14). Like Smith, Campbell also recommended simultaneous reinforcement of the medial collateral ligament if it appeared damaged.
[FIGURE 13 OMITTED]
[FIGURE 14 OMITTED]
Kenneth Jones became, together with William Clancy, the major proponent of patellar tendon in the US (Jones 1963, Clancy 1985). In the early 1960s Jones started using the central third of the tendon, which he passed 'beneath the fat pad' into the femoral tunnel. As the graft was generally shorter than a normal ACL, the tunnel had to be brought forward, away from the anatomical foot-print of the ligament. This created an extremely non-physiological graft placement and was responsible for the relatively disappointing long-term results (Jones 1980). His technique nevertheless, gained widespread popularity, and patellar tendon ACL reconstruction became known as the 'Jones Procedure' (Lam 1968).
Helmut Bruckner of Germany recognised the shortcomings of Jones's technique (Bruckner 1966). To overcome problems of insufficient graft length, he routed the patellar tendon through a tibial tunnel, thereby gaining enough distance to position the femoral tunnel at the anatomic foot-print. In Sweden the group of Brostrom and Gillquist introduced a similar technique, but instead using a femoral tunnel, the tendon graft was secured against the femoral foot-print with trans-osseous sutures (Brostrom et al 1968) (Figure 15). As an alternative to a pedicled graft, Bruckner also introduced free bone-patellar-tendon-bone, which was to become one of the most popular graft choices in ACL surgery (Bruckner 1966, Pietsch et al 1969, Franke 1976, Clancy 1985).
[FIGURE 15 OMITTED]
Harvesting of the patellar tendon graft however was not without morbidity (e.g. patellar tendinopathy, anterior knee pain), prompting some surgeons to consider quadriceps tendon as alternative graft material (Sachs et al 1989, O'Brien et al 1991, Aglietti et al 1993). It was first used by Walter Blauth in Germany in 1984, but it was not until John Fulkerson of Connecticut started promoting quadriceps ACL reconstruction in the mid 1990s, that it became recognised as a suitable alternative by a wider audience (Blauth 1984, Fulkerson & Langeland 1995). Although quadriceps never achieved the popularity of patellar or hamstrings grafts it continues to occupy a fringe position and is often considered in revision situations or when other graft sources are unavailable (DeAngelis & Fulkerson 2007, Garofalo et al 2006).
The idea to replace the torn ACL with hamstring tendons was created in 1926 through the work of the Scottish surgeon Alexander Edwards who published on an operation he had performed on a cadaver (Edwards 1926). His idea was picked-up by the Italien Riccardo Galeazzi (1866-1952), who in 1934 pioneered anatomic ACL reconstruction with pedicled semitendinosus tendon based on Hey-Groves original technique (Galeazzi 1934) (Figure 16). He was followed in 1939 by Harry Macey (1905-1951) staff surgeon at the Mayo Clinic, who introduced the procedure in the US (Macey 1939). The 1950s saw a variety of different techniques emerge, most notably the 'Lindemann Procedure'. By using proximally based gracilis tendon, Lindemann (1901-1966) preserved the tendon and muscle unit, which he believed would work as a dynamic stabiliser, preventing anterior subluxation of the tibia (Lindemann 1950). He reported on 14 of his patients, 11 of which achieved a good result. Robert Augustine, unaware of Lindemann's publication, developed an almost identical procedure but proposed to use the stronger semitendinosus tenden instead (Augustine 1956) (Figure 17).
[FIGURE 16 OMITTED]
[FIGURE 17 OMITTED]
It was however not until 1975, when Kenneth Cho rediscovered the use of distally based semitendinosus routed through tibial and femoral tunnels, that hamstrings became recognised as suitable ACL reconstruction grafts particularly in the US (Cho 1975). The real breakthrough for hamstrings as ACL graft came in 1982 with Brant Limpscomb, who started using both semitendinosus and gracilis tendon as a double strand (Limpscomb 1982). Marc Friedman followed in 1988, pioneering arthroscopically assisted four-stranded hamstring, a technique which continues to be used today (Friedman 1988). Recent clinical studies comparing hamstrings with patellar tendon revealed little difference with regard to knee function and the prevalence of osteoarthritis (Holm et al 2010). Because of their excellent safety profile and low level of harvesting morbidity, hamstring tendons have become one of the most popular graft sources in the reconstruction of the ACL of all times.
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About the author
Oliver S Schindler
MD FMH MFSEM FRCSEd FRCSEng FRCS(Orth)
Consultant Orthopaedic Surgeon & Knee Specialist, St Mary's Hospital, Clifton, Bristol
No competing interests declared
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KEYWORDS ACL / Anterior cruciate ligament / Reconstruction
Provenance and Peer review: Unsolicited contribution; Peer reviewed; Accepted for publication February 2012.
by Oliver S. Schindler
Correspondence address: Oliver Schindler, Bristol Arthritis & Sports Injury Clinic, PO Box 1616, Bristol BS40 5WG. Email: firstname.lastname@example.org
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