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Extraskeletal calcified synoviobursitis.

A large synoviobursitis calcified mass is not commonly seen in the digits of the foot. After injury, effusion subcutaneous hemorrhage and synovitis may occur with a fluctuating edema over the inflamed parts. In the later stages, a nodular type of increase in soft tissue density within the confines of the joint capsule may be the result of tumor formation. The mass may develop beyond capsular tissue and may resemble a synoviobursitis calcified mass. This must be considered in a differential diagnosis to rule out any malignant manifestation.

Bursitis↗

Effects of 6 degree elevation of the heels on 3D kinematics of the distal portion of the forelimb in the walking horse.

REASONS FOR PERFORMING STUDY: Understanding of the biomechanical effects of heel elevation remains incomplete because in vivo studies performed with skin markers do not measure the actual movements of the 3 digital joints. OBJECTIVE: To quantify the effects of 6 degree heel wedge on the 3-dimensional movements of the 4 distal segments of the forelimb in the walking horse. METHODS: Four healthy horses were used. Kinematics of the distal segments was measured invasively with a system based on ultrasonic triangulation. Three-dimensional rotations of the digital joints were calculated by use of a 'joint coordinate system' (JCS). Data obtained with heel wedges were compared to those obtained with standard shoes during the stance phase of the stride. RESULTS: Heel wedges significantly increased maximal flexion of the proximal (PIPJ) and distal (DIPJ) interphalangeal joints and maximal extension (mean +/- s.d. +0.8 +/- 0.3 degrees) of the metacarpophalangeal joint (MPJ). Extension of the PIPJ and DIPJ was decreased at heel-off. Few effects were observed in extrasagittal planes of movement. CONCLUSIONS: Heel wedges affect the sagittal plane kinematics of the 3 digital joints. POTENTIAL RELEVANCE: Controversial effects previously observed on the MPJ may be explained by the substantial involvement of the PIPJ, which was wrongly neglected in previous studies performed on the moving horse.

Animals↗

A new operation for hallux valgus.

A distal oblique osteotomy on the first metatarsal, with lateral displacement of the metatarsophalangeal joint and internal fixation with a compression screw, was performed. No splint or plaster was used. The operation is relatively simple and effective. Pain and discomfort during a short healing period are minimal. Forty-nine feet were operated on in 42 patients by eight surgeons. The patients were advised to bear full weight after six weeks. Return to unlimited work was possible after six weeks. The complications were superficial infection in one case and screws entering the metatarsophalangeal joint in two cases. One patient complained of metatarsalgia after the operation, but all other patients were satisfied after follow-up periods ranging from three months to six years.

Adolescent↗

Radiographic appearance of the navicular bone and distal interphalangeal joint and their relationship with ossification of the collateral cartilages of the distal phalanx in Finnhorse cadaver forefeet.

Radiographic findings in the navicular bone and distal interphalangeal joint as well as the ossification status of the collateral cartilages of the distal phalanx were evaluated in 100 Finnhorse cadaver forefeet. The most common shapes of the proximal articular margin of the navicular bone were convex and straight. Remodeling of the navicular bone was common, especially on the lateral extremity. No bony fragments were identified at the distal flexor margin even though this area appeared irregular in several feet. Several large, rounded or lollipop-shaped synovial invaginations were identified in only six feet. The thickness of the flexor cortex varied considerably, and the corticomedullary junction was uni- or bilaterally indistinct in nine feet. The shape of the sagittal ridge of the flexor cortex was commonly flat but varied. It appeared locally irregular or indistinct in 17 feet, but changes elsewhere along the flexor cortex were rare. Osteophytosis on the dorsal and palmar margins of the distal interphalangeal joint and entheseophytosis on the dorsal aspect of the middle phalanx and on the extensor process of the distal phalanx were common. "Possibly significant" ossification of the collateral cartilages (high sidebones or separate centers of ossification) was present in 36 feet; all grades of ossification in the proximal/palmaroproximal direction as well as palmar ossification were seen. A statistically significant relationship was found between entheseophytosis on the proximal flexor margin of the navicular bone and "possibly significant" ossification. Osteophytosis on the palmarodistal margin of the middle phalanx was more common in feet with a relatively long distal phalanx, suggestive of palmar ossification. Radiographic changes in the navicular bone or in the distal interphalangeal joint did not otherwise appear to be associated with ossification of the collateral cartilages of the distal phalanx in Finnhorses.

Animals↗

Successful orthotopic free autogenous joint grafts in the dog.

Thirty free autogenous metacarpal and 26 phalangeal articular cartilages were transplanted in the forefoot of dogs. The graft in each case included the articular surface and a minimal amount of supporting subchondral bone. The majority of the metacarpal grafts retained a normal gross, microscopic, and radioautographic appearance, some for up to 1 year after transplantation. In contradistinction, all of the phalangeal grafts failed, probably because their flatt surface made it impossible to maintain adequate fixation to the host bed. As a result the majority of these grafts became displaced. Analysis of the incorporation of the metacarpal grafts into the host bed showed that this occurred when there was no significant period during which the articular cartilage was without subchondral support. The situation is different in the case of joint grafts with a larger amount of subchondral bone. In these, during the time that this necrotic bone is being resorbed and replaced by normal viable bone, the articular cartilage has extremely limited subchondral support.

Animals↗

Metatarsus primus varus: including various clinicoradiologic feautres of the female foot.

Metatarsus primus varus occurs in feet which have a normal 1--2 intermetatarsal angle. Fifty-two Caucasian females, average age 18 years, were analyzed radiologically for 1--2 and 1--5 intermetatarsal angles and for metatarsophalangeal and first interphalangeal joint angles. Measurement of the 1--5 rather than the 1--2 intermetatarsal angel is a more reliable indicator of first metatarsal varus. Valgus at the first interphalangeal joint is normally greater than that at the first metatarsophalangeal joint and excessive first interphalangeal valgus (valgus interphalangeus) is significantly linked with the presence of ossia tibiale externa. The high arch foot tends either to feature valgus interphalangeus or become excessively broad. The anatomy of the ungual tuberosity is highly variable.

Adolescent↗

A description of the motion of the navicular bone during in vitro vertical loading of the equine forelimb.

Motion of the navicular bone might play a role in the development of navicular disease in horses but is difficult to asses. In the present study, 3-dimensional motion of this bone was determined using roentgen stereophotogrammetric analysis. Tantalum pellets were inserted, in vitro, in the bones of 6 forelimbs of mature Shetland ponies and kinematics were measured during vertical loading up to 2 kN. The motions of the navicular bone and coffin joint were limited to flexion/extension, there were no substantial out-of-plane motions. There was only little flexion between the navicular bone and the coffin bone, which was correlated (r = 0.66) with coffin joint flexion. There was substantial flexion between the navicular bone and the short pastern, which was highly correlated with coffin joint flexion (r = 0.97). We conclude that the navicular bone, generally, follows the coffin bone during coffin joint flexion, although there are small but consistent motions between the navicular bone and the coffin bone. These motions might play a role in the development of navicular disease in horses.

Animals↗

Nodular pigmented villonodular tenosynovitis.

Pigmented villonodular tenosynovitis is a proliferative disorder of the synovium that can involve the joints, tendon sheaths, and bursae. There are two histologically similar lesions of pigmented villonodular tenosynovitis--nodular pigmented villonodular tenosynovitis and diffuse pigmented villonodular tenosynovitis. The authors present a case involving nodular pigmented villonodular tenosynovitis, which is the more rare form of these two lesions.

Humans↗

Toe-to-hand transfer for traumatic digital amputations in children and adolescents.

In the period from July of 1990 to August of 1994, 45 toe or toe tissue transfers were performed in 28 children and adolescents with traumatic amputation of digits. The average age at the time of transfer was 12 years (range, 3 to 16 years), and the median age was 10 years. The methods of reconstruction included transfer of 6 trimmed great toes, 2 great toe pulps, 24 second toes, 1 vascularized metatarsophalangeal joint from the second toe, 2 third toes, 4 combined second and third toes. and 1 combined third and fourth toes. All of the transferred toes, except one second toe, ultimately survived. Exploration and reanastomosis were required in three cases owing to arterial insufficiency. Partial pulp loss occurred in two digits. Follow-up ranged from 1 to 5 years (average, 3 years). Bony union occurred uneventfully in all patients. Two-point discrimination averaged 5 mm (static) and 6 mm (moving). Active range of the motion averaged 69, 38, and 13 degrees at the metaphalangeal proximal interphalangeal and distal interphalangeal joints of the reconstructed fingers, respectively, and 15 degrees at the interphalangeal joint of the reconstructed thumbs. None of the children required subsequent tenolysis. Pulp plasty was performed in nine digits in seven patients. Radiologically, the transferred phalanges showed the some growth as the non-transferred ones. Trimming the great toe before transfer did not result in premature physeal closure or growth retardation. The donor foot maintained a satisfactory appearance. None of the patients complained of difficulty in running or jumping. Toe-to-hand transfer in children, performed meticulously, can provide a valuable option for reconstruction of traumatic digit loss.

Adolescent↗

Injuries to the toes and metatarsals.

Traumatic injuries to the toes and metatarsals are common injuries affecting nearly every individual. Injuries may be precipitated by industrial accidents or simple bumps in the night. They can produce a wide spectrum of consequences ranging from permanent disability to asymptomatic deformities. With appropriate treatment, most individuals should have the capacity to return to their preinjury functional status.

Foot Injuries↗

[Free vascularized joint transfer during surgery for hypoplastic thumb].

Hypoplasia and aplasia of the thumb constitute approximately 11% of congenital disorders of the upper extremity. Surgical treatment depends on type of disorder in Blauth classification used in our Department. Soft tissue procedures and pollicisations are performed most often. Microsurgical transplantation of interphalangeal joint from the toe is an alternative. This paper describes a case of microsurgical treatment in 20 years old patient with hypoplastic thumb. Two months after surgery the range of motion in transplanted joint was between 20 and 75 degrees.

Adult↗

Calcium pyrophosphate dihydrate deposition disease presenting as tumoral calcinosis (periarticular pseudogout).

It has been considered unusual for periarticular calcifications to consist of calcium pyrophosphate dihydrate (CPPD). We describe a patient presenting with pain and inflammation adjacent to the site of tumoral calcifications and extending to the first metatarsophalangeal joint. Aspiration of the material revealed weakly positive birefringent rhomboid shaped crystals that proved to be CPPD by atomic force microscopy. The patient had no metabolic abnormalities or radiographic chondrocalcinosis. We believe other cases similar to ours represent another clinical form of CPPD deposition disease-periarticular pseudogout.

Aged↗

Course of damage to the hallux over 5 years after forefoot resection arthroplasty in rheumatoid arthritis patients.

A retrospective study of 34 feet from 20 consecutive patients with rheumatoid arthritis was performed to investigate the development of damage to the hallux over 5 years after forefoot resection arthroplasty. Radiographically we analysed changes in two valgus angles and the interphalangeal joint (IP) damage of the hallux. These parameters were measured preoperatively, 12 months postoperatively, and at the latest follow-up. Although the average HVA (between the first metatarsal and the proximal phalanx) significantly decreased from 38.7 degrees preoperatively to 8.66 degrees postoperatively, the angle increased to 23.0 degrees during the first 12 months following surgery. Further deterioration of the angle at the last follow-up was not detected (25.3 degrees ; P=0.252). The average IPV (between the proximal phalanx and the distal phalanx) angle significantly increased from 6.65 degrees preoperatively to 12.1 degrees 12 months postoperatively and thereafter slightly increased to 13.3 degrees at the latest follow-up. The average of the Sharp/van der Heijde score of the IP joint significantly increased from 5.71 preoperatively to 8.58 12 months postoperatively and thereafter slightly increased to 9.65 at the latest follow-up. The deterioration and destruction process of the hallux after resection arthroplasty occurred soon after surgery, and the progression of the deformity was temporary.

Adult↗

Ligamentous restraints of the second tarsometatarsal joint: a biomechanical evaluation.

Ligamentous injury of the tarsometatarsal joint complex is an uncommon, but disabling condition that frequently occurs in elite athletes. There are few options for managing these injuries, in part because the relative mechanical contribution of the ligaments of the tarsometatarsal joint is unknown, complicating decisions regarding which ligaments need reconstruction. In the current study, strength and stiffness of the dorsal, plantar, and Lisfranc ligaments of 20 paired cadaver feet were measured and compared. The plantar and Lisfranc ligaments were significantly stiffer and stronger than the dorsal ligament, and the Lisfranc ligament was significantly stronger and stiffer than the plantar ligament.

Biomechanical Phenomena↗

Arthrodesis of the first tarsometatarsal joint for correction of the advanced splayfoot accompanied by a hallux valgus.

OBJECTIVE: Arthrodesis of the first tarsometatarsal joint for the treatment of a painful splayfoot with the aim to restore a normal weight bearing on the first ray. Correction of hallux valgus deformity. INDICATIONS: Advanced splayfoot deformity with a first intermetatarsal angle > 18 degrees. Hypermobility of the first tarsometatarsal joint with reduced weight bearing on the first ray and development of a transfer metatarsalgia. Painful, primary or secondary osteoarthritis of the first tarsometatarsal joint. Recurrence of splayfoot deformity after previous attempt at surgical correction. Elevation of the first ray such as after developmental clubfoot. Metatarsus primus varus deformity accompanied by hallux valgus in the presence of a hypermobile flatfoot. CONTRAINDICATIONS: Minimal or moderate splayfoot deformity with a first intermetatarsal angle < 17 degrees and a clinically stable first tarsometatarsal joint. Untreated hindfoot deformities such as flatfoot combined with heel valgus. Inability to use walking aids for postoperative partial weight bearing. Insufficient circulation of forefoot. SURGICAL TECHNIQUE: Dorsomedial incision overlying the first tarsometatarsal joint. Splitting of the extensor aponeurosis medial to the tendon of the extensor hallucis longus. Subperiosteal exposure of the first tarsometatarsal joint. Opening of the joint. Judicious removal of articular cartilage and resection of a laterally based bony wedge from the medial cuneiform for correction of the increased first intermetatarsal angle. Manual correction of the splayfoot with concomitant plantar displacement of the base of the first metatarsal. Selection of properly fitting fixed-angle plate and internal fixation. Soft-tissue correction at the first metatarsophalangeal joint or metatarsal neck osteotomy to realign the articular surface of the first metatarsal head. RESULTS: Clinical and radiologic results based on 56 patients (64 feet) followed up for an average of 8.2 months. COMPLICATIONS: one reflex sympathetic dystrophy, four nonunions of the first tarsometatarsal joint (6.2%). Radiologic evidence of consolidation at a mean of 9 weeks. Improvement of the first intermetatarsal angle from 20.4 degrees to 11.2 degrees. Pressure measurement showed a significantly improved load-carrying capacity of the first ray. The score of the American Orthopaedic Foot and Ankle Society improved significantly (p < 0.01) from 51 to 92 points.

Arthrodesis↗

Absorbable pin: a new method of fixation for digital arthrodesis.

A new method of fixation of digital arthrodesis is being used at Atlanta Hospital. A total of 58 digits have been arthrodesed at the proximal interphalangeal joint using absorbable pin fixation. The technique of absorbable pin insertion, as well as the advantages and disadvantages, are discussed in this article. Infection, foreign body reaction, vascular compromise, or excessive swelling and edema were not evident in any of the 58 digits reviewed. The internal absorbable pin fixation is considered a viable alternative to previous forms of fixation for digital arthrodesis. The absorbable pin previously has been used for osteochondral fractures of the knee.

Arthrodesis↗

The contributions of microvascular surgery to emergency hand surgery.

Microvascular surgery has revolutionized the field of emergency hand surgery in the areas of replantation and microvascular transplantation. Amputated parts from as small as a distal phalanx to the entire extremity can now be successfully replanted and unreplanted, or missing parts can be restored and reconstructed with immediate microvascular transplants (MVTs). MVTs can be used to cover exposed vital structures and replace missing complex parts. Part or whole digits can be reconstructed, with up to 4 toe transplants. Joints, bones, and muscles can be replaced with osteocutaneous and neuromyovascular transplants. Using the same approach for multiple replants, teams of 4 to 6 surgeons operating simulatneously and sequentially around the clock can accomplish multiple microvascular transplants in the acute setting. The classical principle of hand surgery, "preserve length and function", can now be modified to "restore length and function."

Amputation, Traumatic↗