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Conservative management of posterior tibial tendon dysfunction, subtalar joint complex, and pes planus deformity.

Conservative management of PTTD can present from fairly simple to quite complex based on the wide range of clinical presentation that is inherent to this pathology. Treatment for PTTD ranges from the use of orthopedic footwear to the use of PTB AFOs, which certainly substantiates the prevalence of this disorder and the high rate of conservative management. With the increase in the population number and the fitness and health awareness that pervades our society, PTTD will more than likely continue to be a large part of the conservative footcare practitioner's practice in the future. The footcare team should include the pedorthist and orthotist to care for all the stages of PTTD. Perhaps with the increase in popularity of comfort footwear and increased use of orthoses (over the counter and custom-made), physicians can deter and alter the established pathway of the progression of this disorder. Preventive measures may, in some way, affect the foot health of the aging population. Conservative management of PTTD certainly has a place in today's healthcare climate.

Ankle↗

Use of the Maxwell-Brancheau arthroereisis implant for the correction of posterior tibial tendon dysfunction.

Successful management of the flexible flatfoot deformity relies not only on correcting causal factors, but also on addressing the adaptive changes that have occurred and any coexisting deformities present. The three primary goals of any therapy--relief of pain, biomechanical control of excessive pronation, and prevention of the progression of the deformity--should be considered. With thorough assessment of causal factors and planal dominance of the deforming and compensative forces, one can expect to increase the predictability and success of the surgical management of PTTD in the flexible adult flatfoot deformity.

Adult↗

Calcaneal osteotomy for the treatment of posterior tibial tendon dysfunction.

The surgical treatment of PTTD has been well-discussed in the literature. The calcaneal displacement osteotomy is a powerful, yet relatively easy, procedure that accomplishes a significant amount of frontal plane correction in the surgical treatment of PTTD. It can be performed as a straight medialization osteotomy for moderate hindfoot valgus, and must be performed with a resectional wedge in the treatment of large valgus angles. To achieve optimal correction, it must be coupled with procedures that address the triplanar nature of the deformity. When used in combination with other reconstructive procedures, it provides a valuable alternative to other more joint-destructive procedures.

Calcaneus↗

Talonavicular arthrodesis for correction of posterior tibial tendon dysfunction.

The awareness of PTTD has increased because of the efforts of McGlamry and Mueller. The treatment for PTTD depends on the patient's age and weight, systemic factors, length of time of the disease course, and the extent of foot collapse. The period of time from injury to diagnosis often is delayed because of the gradual progression of the condition. The patient that presents with an acute injury often responds well to a soft-tissue procedure. The delay in treatment usually necessitates the performance of an osseous procedure to correct the deformity and align the foot. The talonavicular arthrodesis is indicated in the flexible flatfoot deformity when degenerative changes of the subtalar joint are not present. The talonavicular arthrodesis is effective for correcting the flexible flatfoot deformity because it reduces the forefoot abduction, increases the height of the arch, stabilizes the medial column, and prevents excessive subtalar joint pronation. The primary complications associated with the talonavicular arthrodesis are nonunions and development of arthritis in adjacent joints. The incidence of nonunion can be directly attributed to poor surgical technique and early weight bearing during the postoperative period. The degenerative changes that occur in adjacent joints are often present preoperatively because of the long-standing valgus deformity. The procedure effectively maintains the correction of the flatfoot over a long period of time, and allows the patient to return to a pain-free lifestyle. The talonavicular arthrodesis is the procedure of choice in the flexible flatfoot deformity because the procedure corrects the malalignment of the subtalar and midtarsal joints and prevents excessive subtalar joint pronation.

Adult↗

Posterior tibial tendon dysfunction in the athlete.

It has been demonstrated that athletes who are properly diagnosed and treated early for PTT dysfunction with aggressive conservative management typically have a much better prognosis and are able to return to activities much sooner. Conservative management of this over-use or traumatic injury is helpful, even as a stop-gap measure in anticipation of a inevitable surgical correction. For the elderly, sedentary, or high-risk patient, aggressive conservative care is a viable option in lieu of surgical intervention. If surgery is indicated, however, there are a multitude of procedures to choose depending on the pathology and its extent.

Athletic Injuries↗

Gliding resistance of the posterior tibial tendon.

BACKGROUND: Abnormal gliding of the posterior tibial tendon may lead to mechanical trauma, degeneration, and eventually posterior tibial tendon dysfunction. Our study analyzed the gliding resistance of the posterior tibial tendon in intact feet and in feet with simulated flatfoot deformity. METHODS: An experimental system was developed that allowed direct measurement of gliding resistance at the tendon-sheath interface. Seven normal fresh-frozen cadaver foot specimens were studied, and gliding resistance between the posterior tibial tendon and sheath was measured. The effects of ankle and hindfoot position and the effect of flatfoot deformity on gliding resistance were analyzed. Gliding resistance was measured for 4.9 N applied load to the tendon. RESULTS: Mean gliding resistance for the neutral position was 77 +/- 13.1 (x10(-2) N). Compared to neutral position, dorsiflexion increased gliding resistance and averaged 130 +/- 38.9 (x10(-2) N), and plantarflexion decreased gliding resistance and averaged 35 +/- 12.6 (x10(-2) N). Flatfoot deformity increased gliding resistance compared to normal feet, averaging 104 +/- 17.0 (x10(-2) N) for neutral, 205 +/- 55.0 (x10(-2) N) for dorsiflexion, and 58 +/- 21.3 (x10(-2) N) for plantarflexion. CONCLUSIONS: The findings indicate that patients with a preexisting flatfoot deformity may be predisposed to develop posterior tibial tendon dysfunction because of increased gliding resistance and trauma to the tendon surface.

Aged↗

Operative treatment of the difficult stage 2 adult acquired flatfoot deformity.

In the flexible pes planovalgus deformity of stage 2 posterior tibial tendon dysfunction, osteotomies appear to have a significant role in operative management by restoring more normal biomechanics, allowing tendon transfers to function successfully. The options when considering osteotomies for stage 2 disease include lateral column lengthening, medial displacement calcaneal osteotomy, and combined double osteotomy technique. The tight Achilles tendon should be lengthened as well. Lateral column lengthening has been used extensively for treatment of flexible flatfeet. It has been shown clinically and radiographically to address all 3 components of the pes planovalgus deformity present in stage 2 posterior tibial tendon dysfunction. Lateral column lengthening is used in combination with a medial soft tissue rebalancing procedure. The mechanism of action is still speculative but clearly is not owing to tensioning of the plantar fascia as previously thought. Despite the excellent correction of foot posture obtained by use of lateral column lengthening for adult acquired flatfoot, many clinicians have reservations about its use because of reported secondary increases in the calcaneocuboid joint pressures. This increase in pressure has been shown to occur experimentally, increasing the potential risk of calcaneocuboid joint arthrosis. This experimental evidence is supported by Phillips' study of the original Evans procedure, which resulted in a 65% incidence of calcaneocuboid joint arthrosis at 13-year follow-up. Mosier-LaClair et al reported a 14% incidence of calcaneocuboid joint arthritis at 5-year follow-up after double osteotomy for stage 2 posterior tibial tendon dysfunction. This incidence has not been proved true in the remainder of the literature surrounding this procedure and its use for flexible flatfoot. To address the concern regarding potential calcaneocuboid arthrosis secondary to lateral column lengthening, calcaneocuboid joint distraction arthrodesis has been explored as an alternative technique. The results show good initial correction, but the follow-up is extremely limited, and one study reported loss of correction over time. Longer follow-up is needed to determine whether or not this technique would provide the lasting correction seen with the Evans procedure. Calcaneocuboid joint lengthening arthrodesis does result in some limitation of adjacent hindfoot motion. Although this limitation is significantly less compared with talonavicular and subtalar joint fusion, this procedure may result in increased local pressures and arthrosis of the midfoot or hindfoot. For the above-mentioned reasons, longer follow-up studies are needed to determine whether calcaneocuboid joint distraction arthrodesis would prove to be a reliable and safe alternative for lateral column lengthening in the treatment of adult acquired flatfoot. Medial displacement calcaneal osteotomy has been used for correction of the pes planovalgus foot in posterior tibial tendon dysfunction. It has been used extensively for the surgical treatment of flexible flatfoot throughout the literature. Medial displacement osteotomy, in combination with flexor digitorum longus tendon transfer, can address all 3 components of adult acquired flatfoot. It does not recreate the medial longitudinal arch in all patients, however. Although the mechanism of action of medial displacement calcaneal osteotomy is unknown, it has been proved that it is not through the tightening of the plantar fascia in a windlass effect as previously thought. In contrast to lateral column lengthening, however, medial displacement calcaneal osteotomy does address the deforming valgus force of the Achilles tendon. Functionally transferring the insertion of the Achilles tendon medially removes a constant valgus-deforming force. The osteotomy can then act as a double tendon transfer with the flexor digitorum longus tendon to aid in foot inversion. For stage 2 posterior tibial tendon insufficiency, the authors favor the combination double osteotomy technique with a flexor digitorum longus tendon-to-medial cuneiform tendon transfer, débridement or removal of the posterior tibial tendon, and percutaneous heel cord lengthening. Early results were positive at 1.5 years after surgery with respect to maintenance of correction and functional improvement with no evidence of calcaneocuboid arthrosis. More recently, the intermediate 5-year follow-up has been assessed for this combination of procedures, and similar results were found. There was a high rate of patient satisfaction and functional improvement, and surgical correction of the flatfoot deformity was maintained and compared favorably with the contralateral normal foot. Although the intermediate follow-up found a 14% incidence of calcaneocuboid arthrosis, 50% of these patients had preoperative evidence of calcaneocuboid joint arthritis. (ABSTRACT TRUNCATED)

Adult↗

Surgical treatment of acquired flatfoot deformity: what is the state of practice among academic foot and ankle surgeons in 2002?

PURPOSE: This study was performed to review the present approach to the surgical treatment of acquired flatfoot deformity among a cross section of academic foot and ankle surgeons in the United States. METHODS: A typical case of stage II posterior tibial tendon dysfunction was developed. The hypothetical patient was a healthy 62-year-old male with a symptomatic acquired flatfoot deformity with posterior tibial tendon dysfunction. Nonoperative management had failed. A series of academic foot ankle surgeons were surveyed to identify their proposed operative treatment. Each surgeon surveyed was affiliated with an orthopaedic residency program and was directly responsible for teaching orthopaedic residents. Each surgeon had foot and ankle patients as the major component of their practice. The overall response rate was 81% (104/128). RESULTS: Ninety-seven percent (101/104) of respondents reported that they would employ some type of bony procedure in their surgical treatment. Eighty-eight percent (89/104) described techniques that would preserve the subtalar and talonavicular joints. These included a medializing calcaneal osteotomy in 73% (76/104), a lateral column lengthening in 41% (43/104), and a medial column stabilization (first tarsometatarsal and/or navicular cuneiform arthrodesis) in 15% (16/104). Twelve percent (12/104) reported that they would perform an arthrodesis of one or more of the hindfoot joints. Ninety-eight percent (102/104) of respondents reported that they would employ some type of soft-tissue procedure. Ninety-four percent (98/104) would augment the posterior tibial tendon, 53% (55/104) would formally repair the spring ligament, and 70% (73/104) would address a presumed equinus contracture. CONCLUSIONS: There is a wide variation in the approach to surgical treatment of stage II acquired adult flatfoot deformity among academic foot and ankle surgeons. Most surgeons employed a combination of bony and soft-tissue procedures that preserved the subtalar and talonavicular joints.

Adult↗

Orthoses in the treatment of rearfoot problems.

Orthotic management is helpful in the treatment of most orthopedic conditions involving the rearfoot, including plantar fasciitis, Achilles tendon disorders, posterior tibial tendon dysfunction, flatfoot, ankle sprains, and problems associated with diabetes, arthritis, and equinus disorders. A review of the effectiveness of orthoses in the treatment of these conditions is presented here. An in-depth analysis of the orthotic management of plantar fasciitis and a critical review of foot orthoses for the pronated foot are presented. Also discussed are the rationale and effectiveness of the tension night splint in the treatment of plantar fasciitis, orthotic devices for the different stages of posterior tibial tendon dysfunction, and the various categories of orthoses for off-loading the diabetic foot. The modern ankle brace, the effectiveness of prefabricated versus prescription foot orthoses, and recent developments in the ankle-foot orthosis are also reviewed.

Arthritis↗

Posterior calcaneal displacement osteotomy for adult acquired flatfoot.

The authors retrospectively reviewed 24 patients who underwent posterior calcaneal displacement osteotomy (PCDO) for posterior tibial tendon dysfunction and adult acquired flatfoot deformity from 1991 to 1996. The average follow-up was 27 months. Analysis consisted of preoperative and postoperative evaluation of radiographs, as well as postoperative subjective results. Ancillary procedures included flexor digitorum longus tendon transfer (n = 19), tendo Achilles lengthening (n = 21), tibialis anterior tendon transfer (n = 5), naviculocuneiform joint arthrodesis (n = 4), and first metatarsocunieform joint arthrodesis (n = 1). The talo-first metatarsal angle on the lateral view decreased from a preoperative average of 22.13 degrees to a postoperative average of 8.50 degrees. The talo-first metatarsal angle on the anteroposterior view decreased from an average preoperative value of 22.96 degrees to a postoperative average of 11.04 degrees. In all cases, talar head coverage at the talonavicular joint improved. Subjective results were categorized as good (n = 17), satisfactory (n = 5), and poor (n = 2). Complications included sural neuritis (n = 6), Achilles tendon rupture (n = 2), difficulty with fixation (n = 2), and undercorrection of deformity (n = 2). Patients who had higher preoperative and postoperative talo-first metatarsal angles on either the anteroposterior or lateral radiographs had significantly poorer outcomes (p = .0403, p = .002, p = .009, p = .001, respectively). In addition, those patients who had medial column fusions had statistically significant poorer subjective results (p = .015). Patients who had flexor digitorum longus (FDL) tendon transfers did significantly better than those patients who did not have FDL transfer (p = .004). The authors conclude that the posterior calcaneal displacement osteotomy is a reasonable option for management of posterior tibial tendon dysfunction in the adult acquired flatfoot.

Adult↗

Recovery of the posterior tibial muscle after late reconstruction following tendon rupture.

The purpose of this study was to determine the recovery potential of the posterior tibial muscle after late reconstruction following tendon rupture in stage II of posterior tibial tendon dysfunction. Fourteen patients (18 women, 6 men; mean age 59.8 years) were investigated 47 months (range, 24-76 months) after surgical reconstruction of a completely ruptured posterior tibial tendon (end-to-end anastomosis, side-to-side augmentation with the flexor digitorum longus tendon) in combination with a distal calcaneal osteotomy with a tricortical iliac crest bone graft for lengthening of the lateral column. At follow-up, clinical and radiological investigations were performed, including strength measurement and qualitative and quantitative MRI investigation. The overall clinical results were graded excellent in 12 patients, good in one, fair in one, and poor in none. The average ankle-hindfoot score (American Orthopaedic Foot and Ankle Society) improved from preoperatively 49.1 (range, 32-60) to 93.1 (range, 76-100) at follow-up. The functional result correlated with patient's satisfaction and sports activities (p <.05). All patients showed a significant strength of the posterior tibial muscle on the affected side, but it was smaller than on non-affected side (p <.05). The mean posterior tibial muscle strength was 75.1 N on affected and 104.9 N on nonaffected side, corresponding to a ratio of 0.73 between the two legs. The mean area of the posterior tibial muscle was 1.89 cm(2) on affected side, and 3.48 cm(2) on nonaffected side, corresponding to a ratio of 0.55 between the two legs. While fatty degeneration for the posterior tibial muscle was found in all patients, it was found to decrease with increasing strength of the posterior tibial muscle (p <.05) and muscular size (p <.05). On postoperative MRI, the posterior tibial tendon could be found to be intact in all patients. The recovery potential of the posterior tibial muscle was shown to be significant even after delayed repair of its ruptured tendon. A ruptured and/or diseased posterior tibial tendon should not be transected as it excludes any recovery possibilities of the posterior tibial muscle.

Adult↗