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Structural metatarsus adductus deformity, surgical case report.

Structural metatarsus adductus deformity may be corrected through the use of closing abductory base wedge osteotomies of all five metatarsals. Although technically demanding, surgical precision is increased through the use of oblique wedges and a combination of screw and cerclage wire fixation. In the severe case, an opening wedge osteotomy of the inner cuneiform (Fowler procedure), with homogenous bone implantation, may be concomitantly used. Both techniques are described in this brief case presentation.

Child↗

Observer variability in the radiographic measurement and classification of metatarsus adductus.

The classification system of Berg was evaluated using four observers and the radiographs of 42 feet from patients with metatarsus adductus. Interobserver disagreement in diagnosis was 36%. Intraobserver inconsistency averaged 26%. The error range for the lateral and anteroposterior talocalcaneal angle measurement was 13.6 and 15.1 degrees intraobserver and 19.8 and 25.2 degrees interobserver, respectively. There was no correlation between classification and the length of time required for cast correction. The irregularity of hindfoot ossification centers makes measurements inconsistent and seriously reduces the usefulness of classification based on such measurements.

Child↗

Simple method of documenting metatarsus adductus.

A simple, accurate, and inexpensive method of documenting metatarsus adductus involves taking photocopies of the foot in the weightbearing position. Subsequently, treatment progress can be assessed objectively by reviewing serial photocopies. Some caution is urged because the strength of the glass copying surface of photocopying machines is unknown.

Copying Processes↗

Compression screw fixation in proximal first metatarsal osteotomies for metatarsus primus varus: initial observations.

Many methods of fixation have been used after proximal abductory metatarsal osteotomies for the correction of metatarsus primus varus. The methods include external immobilization and the application of devices such as stainless steel wire, Kirschner wires, staples, and compression plates. We have combined external immobilization with compression screw fixation across the osteotomy site. Two different types of screws were used: 1) an AO screw 3.6 mm. wide and 26 to 28 mm. long and 2) a standard Woodruff screw 3.5 mm. wide and 31.8 to 44.4 mm long. Twenty-two procedures were reviewed. When we compared the results, we found the AO screw to be superior in the degree of rigid fixation which it provides, as judged by the extent of postoperative callus formation.

Bone Screws↗

Metatarsus primus elevatus and the etiology of hallux rigidus.

One hundred twenty radiographs of the foot were evaluated for hallux abductus angle, lateral talometatarsal angle, and metatarsus primus elevatus position. Mean elevatus position of the first metatarsal above the second metatarsal was approximately 7.0 mm. First ray elevation was a consistent finding in all data groups studied, including controls. The presence of hallux abducto valgus or hallux rigidus did not affect the degree of first ray elevation present. The majority of radiographs studied lacked evidence of joint disease. Therefore, the common practice of evaluating radiographic elevatus as a surgical criteria to predict the possible development of hallux rigidus should be strongly discouraged.

Hallux↗

Resistant metatarsus adductus deformity (illustrated surgical reconstructive techniques).

The dilemma of metatarsus adductus was reviewed in this clinically illustrated essay. A modification of the traditional Berman-Gartland procedure was also reported, along with 5 methods of osseous fixation. A retrospective analysis of 17 surgical cases, performed at Atlanta Hospital, revealed adherence to published indications and guidelines.

Bone Screws↗

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↗

[Congenital metatarsus varus. Value of orthopedic treatment and role of surgery. Apropos of 290 cases].

The authors have reviewed 252 children with congenital metatarsus varus as distinct from club foot with an adequate follow up. They describe fully conservative treatment of the condition and conclude that true correction was obtained in about 80 p. 100 of cases by the age of 3 years and that another 16 p. 100 healed between the ages of 3 and 5 years. There are only about 4 p. 100 of cases which are complex and do not correct. The authors emphasize the fact that among 96 p. 100 of corrections the conservative treatment had no influence whatsoever. When the foot does not correct by the age of 5 years surgery is indicated. Heymann's procedure of correction at Lisfranc's joint seems to give the best results.

Adolescent↗

Pathology of congenital metatarsus varus and its relationship to other congenital deformities of the foot.

Congenital metatarsus varus may be regarded as a deformity caused by a dislocation and in that respect is similar to congenital clubfoot and vertical talus but not to calcaneovalgus. The dislocation causes adaptive bone changes as well as secondary contracture of the soft tissues. That the dislocation in the forepart of the foot may occur in a maximally dorsiflexed foot also may explain the valgus position of the hindfoot. The secondary changes in bone and soft tissue may explain the lack of spontaneous recovery and the difficulties in effecting correction in severe cases. It is still not possible to explain why the dislocation arises.

Foot Deformities, Congenital↗

[Bending and torsion stability of healed metatarsus osteotomy after plate osteosynthesis].

UNLABELLED: 72 transversal osteotomies on metatarsus of sheep were stabilized under contact or gap conditions with three different thicknesses of bone plates. After 16 weeks we measured bending or torsion break loading, moment of inertia of bone by transmission methode and calculated moments of bending and torsion strength. RESULTS: ultimate bending strength on osteotomied bone 100.4 +/- 14.4 N/mm2 under contact, and 77.4 +/- 11.4 N/mm2 under gap condition, torsion bending strength 26.1 +/- 4.9 N/mm2 under contact, and under gap condition 21.5 +/- 4.3 N/mm2. The best results were given by the 2.8 mm plate with the same moment of inertia like the small ASIF plate.

Animals↗

Metatarsus adductus: classification and relationship to outcomes of treatment.

In a retrospective study of results of treatment in 160 children (265 feet) who had metatarsus adductus prospectively defined by severity and flexibility, we found that in 147 patients treated with plaster casts or casts followed by derotation splints the only significant predictor of a good outcome was the age of the patient. Results were statistically significantly better when treatment was begun from ages 1 day to 8 months. No significant correlations with poor results were found using the severity and flexibility grading systems. Given the public attitude toward deformity, it seems wiser to treat in infancy those feet graded "moderate" or "severe." If treatment is not commenced until the child is old enough to preclude conservative treatment, extensive surgery will be necessary to correct a "severe" deformity.

Age Factors↗

Surgical treatment of metatarsus varus during the growth period.

The writers describe their experience in the treatment of congenital metatarsus varus. They describe an original technique for anterior transfer or shortening of peroneus brevis which they consider to be indicated when the varus deformity is less than 15 degrees and is correctable manually. They also describe Heyman's technique and give their results in twenty-five cases. They consider that this operation is indicated only for varus deformity of the forefoot exceeding 15 degrees which is correctable manually. In both these techniques it is essential that the hindfoot should be in the correct midline axis. Where manual correction of the hindfoot is not possible they advise Dillwyn Evans' operation. In varus deformity of the 1st metatarsal exceeding 15 degrees, and not correctable manually, they suggest osteotomy of the base of this bone, displacing it the correct degree and fixing it with a wedge of homoplastic bone inserted into the gap.

Child↗

[The importance of the long tensile system of the sole of the foot for the action of the metatarsus (optical potential study of a model)].

The importance of the plantar tensile systems of the foot are studied by the means of photoelasticity. In a plastic (VP 1527) model of the sagittal section of a foot skeleton the distribution of stressing under load has been visualized in photographs of the isochromes as seen in the polarized light. This examination has been carried out with and without tension in the long plantar tensile systems of the model. It has clearly been shown that by the influence of the tensile systems the resultant force for the forefoot runs approximately in the axis of the bony elements of the metatarsus. In absence of these plantar tensions on the contrary the metatarsal elements undergo considerable bending stresses.

Biomechanical Phenomena↗

[Our experience with surgery of the rheumatoid metatarsus. 150 cases].

The authors report on the results of their experience with surgery of the rheumatoid metatarsus (95 patients operated on--150 operations). The operation most frequently performed was the Lelievre metatarsian resection-alignment. They confirm the advantage of this type of surgery, which provides very handicapped patients with substantial relief, both of pain and of the functional troubles, despite the nature of the disease involved. Out of 80 patients operated on and followed up over a period of 2 to 14 years, and considering the correction of the deformities, the effect on pain and functional troubles, the authors report 103 very good and good results, and 18 poor results and failures. The good results obtained deteriorate only very little in the long run: after 10 years, the very good and good results involving effect on pain, has gone from 96 to 90%. On the other hand, as far as functional troubles are concerned, very good and good results go from 90% to 70%. The authors underline the advantage of a very through examination, in order to look for post-operatory risk factors (peripheral circulatory deficiency and poor resistance to infection). They insist for exercising great prudence when advising an operation consisting of the interposition of an endoprosthesis (Swanson's implant). Indeed, in subjects who are in any way fragile, delays in scarification, related to hematomas complicated or not with skin necrosis appear with increased frequency after interposition of the implant.

Adult↗

Stringhalt secondary to trauma to the dorsoproximal region of the metatarsus in horses: 10 cases (1986-1991).

A review of medical records was used to identify 10 horses in which stringhalt developed subsequent to trauma to the dorsal metatarsus. Six horses developed stringhalt within 3 months after injury, 3 horses developed stringhalt > 3 months after injury, and time from injury to stringhalt was unknown for 1 horse. Horses were treated with exercise, including daily hand-walking with pasture turnout, followed by lunging; or surgically, using lateral digital extensor myotenectomy. Of the horses treated with exercise, 1 had resolution of stringhalt, 2 improved but had residual stringhalt, and 1 had no change. Two of the horses having lateral digital extensor myotenectomy had resolution of stringhalt. Two of the remaining 3 horses treated surgically had varying degrees of improvement, and in 1 horse there was no change. Stringhalt is a potential complication following trauma to the dorsal metatarsal region. Potential causes include tendon adhesions enhancing tarsocrural joint flexion or abnormalities in the myotatic reflex caused by tendon injury that result in abnormal flexion of the tarsocrural joint.

Animals↗

[Heyman's operation for the treatment of congenital metatarsus varus].

The authors report their experience with the operation of Heyman, i.e. complete release of the tarsometatarsal and intermetatarsal joint for the treatment of congenital metatarsus varus. This operation of Heyman is capable of meeting the requirements of correction if the indications are precise and if the surgical technique is perfect. The operation is indicated in cases of varus over 15 degrees, passively reducible, with good axes of the hindfoot and without bony alterations of the Lisfranc joint, in children between 3 and 8 years old. There should be a dorsal and medial capsulotomy, with section of the medial 2/3 of the plantar aspects of tarsometatarsal and intermetatarsal capsules; the lateral portion, the lateral 1/3 of the capsule and the insertions of the fibularis brevis and tibialis anticus should be spared. A complete capsulotomy is not indicated owing to the risk of dislocation of the tarsometatarsal joint. The correction should be stabilized during the operation by Kirschner wires to avoid a loss of correction when putting the foot in plaster.

Bone Wires↗

Alternate method of reducing metatarsus primus adductus angle.

Dr. Evins suggests a relatively simple technique to reduce the metatarsus primus adductus angle associated with hallux abducto valgus. It is used in conjunction with other bunionectomies--often with the modified McBride bunionectomy or the Reverdin osteotomy--with satisfactory results and often makes the Logroscino double osteotomy unnecessary.

Hallux Valgus↗