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Introduction

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

Despite intensive laboratory and clinical investigation, there are no proven disease-modifying therapies for osteoarthritis (OA). Because the disease may progress inexorably to joint destruction, with attendant pain and functional loss, orthopedic surgical procedures have an important role in the management of OA. Surgery is deployed both early in the course of disease as well as later, when joint destruction occurs. Surgery may also have a preventive role prior to the onset of OA.

Accordingly, this study has 3 sections addressing current surgical treatments. The first covers arthroscopic approaches to OA, including the management of lesions commonly associated with OA, such as meniscal tears. The advent of arthroscopic surgical approaches has permitted less invasive access to joints and the opportunity to intervene earlier in the course of joint destruction, potentially to delay and/or prevent what is otherwise a predictably progressive degenerative pathway. The second section of this chapter addresses osteotomies, which are typically performed to restore a more anatomic biomechanical environment and prevent or delay the onset of OA or slow its progression. The third section discusses orthopedic procedures for advanced joint destruction, including total joint replacement (TJR) and arthrodesis (joint fusion).

Finally, remarkable advances in tissue engineering and biologic therapies herald an era of collaborative intervention in which surgeons gain access to joints with minimally invasive approaches and apply biologic or tissue engineering therapies. Some examples of these hybrid therapies already exist, including autologous cartilage implantation and meniscal allograft. The article closes with a brief discussion of tissue engineering and biologic therapies for OA and a glimpse of the role of orthopedic surgery in OA prevention and management over the coming decades.

We recognize that the topic of surgical management of OA is large enough to merit a full text. The goal of this review is not to summarize comprehensively all that is known about surgical management of OA, but rather to provide readers with evidence and perspectives pertaining to the most salient surgical treatments for OA and to summarize the evidence base supporting the use of these surgical strategies.

Arthroscopic procedures for OA

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

As arthroscopic surgery proliferated in the 1980s, it became natural for physicians to consider arthroscopic debridement and lavage for the management of OA. However, studies of the outcome of arthroscopic procedures for OA were methodologically weak and yielded inconsistent results. Two pivotal studies changed the outlook for arthroscopic debridement and lavage for OA. Moseley and colleagues randomized 180 subjects with symptomatic OA to receive one of 3 therapies: arthroscopic debridement, arthroscopic lavage, or a sham procedure. After two years of followup, the outcomes were virtually identical in each group (1). Kirkley and colleagues randomized 170 patients with symptomatic OA to receive either arthroscopic lavage or a standard nonoperative regimen. In this study as well, there was no difference between the two randomized groups after two years of followup (2). On the basis of these studies, there is now general agreement that arthroscopic lavage and debridement are not useful for the management of OA per se in the absence of a superimposed structural lesion such as a meniscal tear (3, 4).

However, the most common indication for arthroscopic surgery in patients with OA of the knee is, indeed, concomitant meniscal tear. The efficacy of arthroscopic partial meniscectomy (APM) in patients with concomitant OA has received relatively little study, especially given that APM is performed in more than 500,000 patients with concomitant OA per year in the US (5). Effects of meniscal surgery documented in observational studies may be complicated by confounding by indication, with more active patients electing meniscal surgery and also at greater risk of OA development or progression on the basis of their increased activity levels and injury rates. Herrlin and colleagues performed the only randomized controlled trial (RCT) addressing this question, comparing the combination of APM with exercise against an exercise program alone (6). The trial showed no clinically meaningful or statistically significant differences between the two strategies. A larger multicenter trial of APM with exercise versus exercise alone, the Meniscal Tear in Osteoarthritis Research Trial, is underway in the US, but results are not expected until 2012. Therefore, the trials by Moseley et al and Kirkely et al provide strong evidence that patients with symptoms attributable to knee OA per se, and not meniscal tear, do not improve following arthroscopic lavage and debridement. Whether APM is useful in patients with symptomatic meniscal tear and concomitant OA is unclear and an area of active investigation.

Beyond the question of symptomatic relief, there is also concern about whether APM may increase the rate of progression of OA. Evidence from cohort studies suggests that patients who have had APM have earlier and more severe OA than age-matched patients who have not had APM (7–12). In addition, patients who have not had surgery but who have a meniscal tear on magnetic resonance imaging are known to have higher rates of incident OA and of OA progression (13). However, it remains unknown whether the increased OA incidence and progression seen in patients with APM is due to the tear, the surgery, or both. Only a trial design can disentangle these potential explanations.

Procedures to alter mechanical environment

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

Malalignment is a well-recognized risk factor for OA incidence and progression (14). Osteotomy is performed to realign joints with the goals of relieving pain (in symptomatic patients) and delaying OA onset or progression. In patients with primarily medial compartment knee OA and varus deformity, high tibial osteotomy is performed either by removing a wedge of bone from the lateral proximal tibia or, more commonly, by opening a wedge space in the medial proximal tibia (Figure 1). This procedure permits the knee to adapt a more valgus alignment, transferring load from the damaged medial compartment to the more normal cartilage of the lateral compartment. Similarly, in patients with lateral compartment knee OA and associated valgus deformity, a distal femoral osteotomy, in which a wedge of bone is removed from the medial distal femur or a wedge is opened in the lateral aspect, shifts the load to the healthier medial compartment.

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Figure 1. Radiograph of medial opening wedge high tibial osteotomy performed for medial compartment osteoarthritis.

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Osteotomy is not as effective as total knee replacement (TKR) in relieving pain, and osteotomy fails sooner than TKR on average, prompting additional surgery. The risk of subsequent surgery following osteotomy in one series was 25% after 5 years of followup, with TKR accounting for approximately 40% of these additional surgeries (15, 16). Therefore, osteotomy is used primarily in younger patients with predominantly unicompartmental OA. This might occur, for example, in the setting of prior trauma or subtotal meniscectomy. A second indication is as an adjunct treatment for cartilage repair procedures to normalize the biomechanical environment. Although it might be expected that osteotomies would delay the onset or progression of knee OA, there have been no trials of studies with concurrent controls. A literature synthesis revealed that after 10 years, one-quarter of tibial osteotomies failed, leading to further surgery (16). In the absence of controls, it is difficult to quantify the benefit of this procedure for patients.

In the hip, dysplasia leads to inadequate acetabular coverage of the femur and overloading and premature OA of the articulating portion of the acetabulum. Acetabular osteotomy is typically performed in younger patients with hip dysplasia to reorient the acetabulum so that healthy acetabular cartilage comes into apposition with the articular surface of the femoral head. To our knowledge, there are no controlled studies of whether acetabular osteotomy delays onset or progression of OA. Case series with >20 years of followup document total hip replacement (THR) rates of approximately 30–40% (17, 18).

Femoroacetabular impingement (FAI) is another precursor lesion that poses a potential risk of hip OA (19). It is not known whether FAI is inherited or acquired. Some propose two parallel etiologies: a primary, congenital deformity that can result in OA, and a secondary deformity from an ongoing arthritic process due to osteophyte formation. This disorder is characterized by decreased congruence between the femoral head and acetabulum. Patients with cam deformity have an eccentric femoral head and head–neck junction. When this eccentric head articulates with the spherical acetabulum, jamming or impingement may occur, potentially damaging the articular cartilage and labrum. In pincer deformity, the anterior edge of the acetabulum is too prominent, resulting in repeated jamming of the acetabular rim with the femoral head during movement. The consequences may include both labral tear and cartilage wear. Cam and pincer lesions may occur in isolation or may be combined. These anatomic abnormalities may be addressed surgically using either open or arthroscopic procedures to remove excess bone and restore congruence. Frequently, repair or debridement of a torn labrum is performed concurrently. Open treatment of FAI was originally pioneered in Europe by Beck et al, but requires significant surgical dissection and dislocation of the hip (20). Due to the morbidity and potential for avascular necrosis of the femoral head with the open procedure, current techniques to address FAI generally utilize an arthroscopic approach that minimizes disruption of soft tissues and allows for outpatient surgery (21). To our knowledge, there have been no trials evaluating the efficacy of surgery for FAI in terms of pain relief or OA prevention. Early case series suggest considerable short-term improvement in functional status and pain scores following surgical management (22, 23). As more surgeons train in the surgical management of these disorders, we are likely to witness rapid growth of surgery for FAI. Defining the appropriate indications for this procedure is an important research priority.

TJR for advanced OA

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

THR surgery was introduced by Charnley in the 1960s, and by the 1970s, surgeons in major orthopedic centers in the US were learning hip replacement techniques. The introduction of TKR soon followed. By 2007, more than 550,000 TKRs, 250,000 THRs, and 23,000 total shoulder replacements were performed in the US (24) (Figure 2). Some estimates suggest that more than 3 million TJRs will be performed annually in the US by 2030 (25). Although total shoulder replacement is the least frequently performed of these 3 procedures, it is the fastest growing (Figure 2). Ankle and wrist replacement surgeries are performed on only 1,100 and 500 patients per year in the US, respectively, and therefore are not shown on the figure (24).

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Figure 2. Annual frequency of total hip, knee, and shoulder replacement in the US, 1993–2007.

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Total ankle, elbow, and wrist replacements are performed less frequently for several reasons. Principally, OA occurs less commonly at these sites than at the hip or knee. Second, arthrodeses of the ankle and wrist joints are reliable, reproducible, and effective alternatives to TJR and restore a reasonable level of function with good relief of pain. A fused elbow, on the other hand, is quite functionally limiting, and as a result, elbow arthrodesis has a limited role.

Indications for THR or TKR.

The indications for TJR are evolving. When THR and TKR were originally introduced and popularized in the 1970s (THR) and 1980s (TKR), they were deployed as interventions of last resort for patients with substantial interference with activities of daily living. However, the risks of complications and early revisions have diminished in the last two decades. In addition, studies have demonstrated that patients operated on later in the course of functional decline have worse functional outcomes than patients operated on earlier (26, 27). Therefore, the indications are expanding and the option of TJR is now typically presented to patients earlier in the course of arthritic progression and its associated functional decline.

Outcomes of THR or TKR.

The risks of complications and death following THR and TKR are similar and most risks are higher following revision than following primary replacement (28–30) (Table 1). As shown in Table 1, it is reasonable to inform patients that less than 1% of patients die and fewer than 5% have a serious complication following primary THR or TKR. The risks following revision surgery are generally higher. Naturally, the patient's exact risk depends on their age, comorbid conditions, and the experience of the hospital and surgeon in performing joint replacement (29–34).

Table 1. Ninety-day risk of complications of total hip and knee replacement in the Medicare population (29, 30)*
ComplicationPrimary THRRevision THRPrimary TKRRevision TKR
  • *

    Values are the percentage. THR = total hip replacement; TKR = total knee replacement.

Mortality1.02.50.71.1
Pulmonary embolus0.90.80.80.5
Deep joint infection0.210.41.8
Dislocation38

The length of inpatient stay for THR and TKR has diminished to a median of 3 days in the US, largely because capitation incentivizes hospitals to shift rehabilitation costs to the outpatient sector or to inpatient rehabilitation facilities (24). Approximately half of TJR recipients in the US are discharged to inpatient rehabilitation facilities (24). Patients who are older, who have more comorbid conditions, and who have less social support at home are more likely to be discharged to an inpatient facility (35). More than 80% of patients have sustained relief of pain following THR and TKR. Risk factors for continued pain following TKR or THR include preoperative presence of depression and worse preoperative functional status (26, 27, 36, 37).

Recipients of THR and TKR can anticipate that the risk of implant failure leading to revision surgery is approximately 1% per year (38, 39). For both procedures, the risk of failure is higher in younger and more active patients. The risk is also higher if the procedure is performed by a low-volume surgeon or center (40, 41). Although short-term failures generally are due to technical problems, longer-term failure of the implant typically arises from symptomatic loosening due to osteolysis. This is an inflammatory process in which wear debris incites an inflammatory foreign body reaction resulting in bone loss (42).

Numerous authors have examined preoperative predictors of outcome of THR and TKR. Worse functional outcomes are predicted by worse preoperative functional status, greater medical comorbidity, lower educational attainment, and worse mental health status (26, 27, 37). Higher hospital and surgeon volume of THR and TKR is associated with lower rates of mortality, perioperative complications, and subsequent revision (32, 33, 40, 41).

Innovative joint arthroplasty technologies.

Innovation continues to characterize the TJR field. A population that has prompted considerable technical innovation includes younger (e.g., age <55 years), active patients who will likely need at least one revision of their THR or TKR in their lifetimes. This clinical dilemma has stimulated a search for biomaterials that produce less wear debris and, in turn, cause less osteolysis, attendant bone loss, and implant failure. This is the rationale for several developments, including highly cross-linked polyethylene and ceramic-on-ceramic and metal-on-metal bearing surfaces. The long-term results of implants using these newer biomaterials are not yet known. There has been concern about untoward effects of these new technologies, including circulating metal ions in metal-on-metal prostheses (43–46), and about squeaking noises arising from ceramic-on-ceramic hips (47). The frequency and impact of these phenomena are subjects of intense investigation. The longer-term performance of these biomaterials will not be known for another decade.

Another area of innovation is hip resurfacing. This procedure does not require complete resection of the femoral head. The femoral component of a hip resurfacing implant has a cap that covers the femoral head, replacing the cartilage surface, and a much shorter stem that anchors the implant in the femoral neck. Early results from studies of hip resurfacing suggest that functional and pain outcomes are similar to those achieved with traditional THR (48). However, it appears from early reports that hip resurfacing has a higher rate of revision than traditional THR, although in certain subgroups such as young men, revision rates are similar (49). Therefore, the indications for hip resurfacing are evolving.

Sex- and patient-specific components have been developed. Although it is recognized that women have different knee geometries than men, there is no evidence to date that sex-specific prostheses improve pain relief, functional outcomes, or implant survival (50). Patient-specific implants are now offered in which preoperative imaging studies are used to develop implants sized specifically to the patient's anatomic details. There is no evidence to date that this expensive technology offers any advantages.

There have also been several innovations in the process of TJR care. Navigation techniques are used by some investigators to improve the placement of components, putatively with lower rates of failure due to malposition of components. Although several studies support the role of navigation in optimizing component positioning, there is no evidence to date that navigation is associated with lower revision rates or improved relief of pain or restoration of functional status over the long term (51–53). Followup of the studies done to date may clarify whether improvements in component placement translate to greater prosthesis longevity.

Minimally invasive TJR is another area of innovation in the process of TJR. “Minimally invasive” implies a smaller incision with less soft tissue disruption than occurs in the usual procedure. Clinical investigators do not agree fully on the criteria for minimally invasive hip or knee replacement. Minimally invasive protocols tend to incorporate other changes in the process of care such as aggressive use of pain medications and earlier mobilization. Therefore, it can be difficult to separate the technical aspects of minimally invasive surgery from other elements of the treatment protocol. Research to date suggests that patients receiving minimally invasive TJR have shorter lengths of inpatient stay than those managed with the traditional approach (54, 55). There is no evidence of superior functional benefit.

Although most of this section has addressed THR and TKR, one of the most important innovations in TJR has occurred with total shoulder replacement. A major limitation of total shoulder replacement is that the implant requires an intact rotator cuff for shoulder abduction. This presents a problem for patients who have advanced rotator cuff degeneration, which is a major cause of OA in the shoulder (56). Reverse total shoulder replacement changes the biomechanics such that the humeral component serves as the new socket and the glenoid component serves as the ball. This reversal permits the deltoid to be used as the shoulder abductor, restoring active elevation of the shoulder. Despite the major advance in treating patients who previously had no good surgical options, this technique is not without complication. Studies show that the complication rate for reverse total shoulder arthroplasty is approximately 3 times that of conventional total shoulder replacement. In addition, radiographic and clinical results have been shown to deteriorate after 6 years (57–60). Future studies will allow for a better understanding of how changes that have been made in implant design and technique will affect long-term outcomes.

Hand and foot procedures for advanced OA

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

Although the knee and hip are arguably the most disabling sites of OA, hand and foot OA are the most prevalent. Advanced OA in these sites can lead to considerable pain and functional limitation. We will briefly discuss orthopedic approaches to OA of the first carpometacarpal joint (basal joint OA of the thumb), wrist and ankle OA, and OA of the first tarsometatarsal joint of the foot.

Advanced destruction of the trapeziometacarpal joint is a frequent source of pain, deformity, and functional limitation. When conservative measures, including activity modification, splinting, nonsteroidal antiinflammatory drugs, and injections, fail to control symptoms, surgery is a reasonable alternative. The standard procedure is a trapeziectomy, with or without the interposition of a tendon or other graft, and with or without ligamentous reconstruction. This surgery can be performed on an outpatient basis and has high rates of success with few complications. More than 90% of surgically treated patients experience pain relief (61, 62). Multiple techniques exist that demonstrate good alleviation of pain and improvement of function. These serve to address degenerative changes and instability at the thumb carpometacarpal joint, the scaphotrapezial joint, and the scaphotrapezoidal joint, as necessary. There is no clear “best” technique based on extensive literature; therefore, surgeon training and preference play a large role in deciding which technique to perform.

Idiopathic OA rarely involves the wrists, but these joints can develop OA following significant trauma, such as intraarticular fractures or intercarpal ligament disruptions, that alter joint kinematics. The procedure of choice for advanced, diffuse, painful wrist OA is an arthrodesis (fusion). Wrist arthrodesis provides consistent pain relief but permanent immobilization of wrist flexion and extension, and radial and ulnar deviation has functional consequences (63). Patients have to rely on their shoulders and elbows for positioning the hand during simple activities such as eating and typing.

Limited salvage wrist procedures attempt to alleviate pain by addressing the arthritic joints while preserving motion at those joints not affected by obvious degenerative change. These procedures must be applied appropriately to each individual's clinical situation and include scaphotrapezio–trapezoid fusion, radioscapholunate fusion, 4-corner fusion, and proximal row carpectomy, among many others (64, 65). Varying degrees of motion preservation, pain relief, and future arthritic progression have been noted.

Total wrist arthroplasty allows for alleviation of pain and preservation of some motion, and may be appropriate for certain patients with OA. However, concerns about the high incidence of implant failure due to loosening and instability have led many surgeons to place postoperative activity restrictions on their patients, thus limiting the ideal patient population to lower-demand individuals (66). Interestingly, patients with bilateral wrist arthritis with a total wrist fusion on one side and an arthroplasty on the other typically prefer the motion-preserving procedure (67).

The most common site of OA in the foot is the first metatarsophalangeal (MTP) joint. This lesion causes hallux rigidus (loss of MTP joint motion due to osteophytes and joint space loss). This problem is typically responsive to changes in activity and footwear. However, in advanced cases, surgery is useful. The least invasive surgical approach is a cheilectomy, in which the anterior joint osteophytes are removed. If this procedure fails, or if joint destruction is particularly severe, the surgeon may proceed directly with an arthrodesis. Arthroplasty procedures have not been successful at this site.

Ankle fusion is also the procedure most frequently performed for advanced ankle arthritis. Here, too, the procedure consistently relieves pain but immobilization of the joint precludes certain activities that require ankle motion, such as cross-country skiing. Patients who wish to retain ankle motion may elect total ankle replacement. A total ankle implant is biomechanically demanding. The procedure is performed routinely, but not frequently, due to the generally excellent results of arthrodesis and the historically high rates of infection and technical failure of total ankle replacement.

Surgical and biologic procedures

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

The tissue engineering and biologic therapy communities have worked intensively in OA, given the prevalence, cost, and disability associated with the condition. To date, there are a few limited successes. Perhaps the most notable is autologous chondrocyte implantation (ACI). Performed in the US since 1995, ACI is Food and Drug Administration approved for the treatment of cartilage defects in the knee. Initially seen as an investigative cell-based therapy, it is now considered an accepted treatment option. Due to the complexity of the procedure and the frequent need for concomitant interventions such as osteotomy and meniscal transplantation, the majority are performed at larger specialized centers. This procedure attempts to repair a symptomatic cartilage defect (Figure 3A) through implantation of chondrocytes grown ex vivo from a small cartilage biopsy sample obtained from the patient in a staging arthroscopy. Appropriate patients for this procedure are younger individuals, typically age <50 years, with isolated cartilage defects typically greater than 3 cm2 in size. Although not approved for patients with established OA, ACI has been shown to be beneficial in early OA in an observational cohort (68). The patient undergoes an initial arthroscopic procedure in which normal cartilage is harvested from a non–weight-bearing site. The 200,000–300,000 chondrocytes contained within the biopsy tissue are released enzymatically and are expanded in cell culture to approximately 12–48 million, depending on the number and size of defects that have to be implanted. After debridement of any degenerated tissue in the defect, a patch material, either periosteum from the patient or a synthetic collagen membrane, is sutured over the defect to create a watertight chamber into which the chondrocyte suspension is injected (Figure 3B). The chondrocytes attach to the subchondral bone and produce cartilage matrix, eventually filling the defect with hyaline-like cartilage.

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Figure 3. A, Cartilage defect on femoral condyle. B, Cartilage defect treated with autologous cartilage implantation.

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Rehabilitation following ACI is demanding; patients cannot be fully weight bearing for two months, and return to athletic activities is delayed for 12–18 months until the cartilage has fully matured. Osteotomies or meniscal transplantation are frequently performed concurrently to normalize the commonly abnormal biomechanical joint environment, thereby protecting the implant.

There have been several controlled trials comparing ACI and other approaches with cartilage defects. One RCT compared ACI with osteochondral autograft transfer (mosaicplasty procedure), where a cylinder of bone and cartilage is transferred into the defect from a lesser weight-bearing area of the knee. The authors concluded that ACI demonstrated better outcomes at 19 months (69). Another RCT compared ACI with microfracture, which aims to induce a reparative process by perforating the subchondral plate, thus allowing bone marrow elements and blood to fill the defect and transform into a fibrocartilaginous scar. It showed that overall microfracture and ACI had similar outcomes 5 years after randomization, with better outcomes in younger patients. Microfracture, however, had significantly worse outcomes in defects larger than 4 cm2, whereas ACI showed no size correlation; the authors therefore concluded that ACI should be recommended for the treatment of these large lesions (70, 71). Two more recent RCTs of microfracture and ACI demonstrated significantly better repair tissue and clinical outcomes with ACI (72–74). Based on these trials, ACI appears as a useful treatment option in defects larger than 3–4 cm2. Further research will be useful to further define the precise role of ACI in the management of cartilage defects.

Meniscal transplantation is a related intervention that has received increased attention in recent years for the treatment of the painful meniscectomized knee. Although orthopaedic surgeons have largely abandoned total meniscectomy occasionally, subtotal meniscectomy is still required, for example, in complex tears of a discoid lateral meniscus that cannot be salvaged by meniscal repair. Patients frequently report a symptom-free interval of a few months or years after subtotal meniscectomy, followed by increasing weight-bearing pain and swelling due to progressive chondral degeneration. Meniscal transplantation can be performed in such patients before significant chondral disease develops, but is not performed in patients with established OA. Prophylactic meniscal transplantation in asymptomatic patients after subtotal meniscectomy has been proposed by some to decrease the risk of developing chondral disease; however, no data are available to evaluate the efficacy of this intervention.

Meniscal transplantation is performed in an open or arthroscopic-assisted procedure with an overnight hospital admission or, with the arthroscopic variant, on an outpatient basis. The transplanted meniscal tissue is ordered specifically for the individual patient and is side and size matched in order to fit the anatomy of the recipient knee. The grafts are harvested from organ donors with intact knee joints and processed sterilely to reduce the risk of contamination, then frozen for storage until matching recipients can be found.

Meniscal transplantation remains controversial, since there are no trials directly comparing transplanted patients with untreated controls. Cohort studies with more than 10 years of followup have demonstrated good symptomatic relief after meniscal transplantation and rates of OA that appear lower than those reported in natural history studies of meniscectomized knees (75, 76). There are trials underway of artificial implants to reduce the reliance on human cadaveric tissue with its associated (albeit low) risk of disease transmission and limited availability (77).

Discussion

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES

In the absence of disease-modifying therapy, many patients with OA progress to advanced joint destruction. Therefore, surgery plays an important role in the management of OA. Advances in biomaterials and tissue engineering will continue to create exciting new opportunities to integrate surgical approaches in OA care. The evidence supporting the use of many surgical approaches is limited by weak study designs and small samples. Advances in the field will need to couple scientific insights with rigorous studies of the efficacy and cost-effectiveness of surgical approaches to OA management.

REFERENCES

  1. Top of page
  2. Introduction
  3. Arthroscopic procedures for OA
  4. Procedures to alter mechanical environment
  5. TJR for advanced OA
  6. Hand and foot procedures for advanced OA
  7. Surgical and biologic procedures
  8. Discussion
  9. REFERENCES
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