Introduction: There are very few data on baropodometric semiology in hallux valgus. Based on the analysis of fore-foot cases, we will try to show if there are early baropodometric signs of perturbation of support by the first ray.

Material: We compared clinical, radiological and baropodometric data from 105 feet (35 women, 18 men, average age: 55). The MT1/MT2 angle measured 1.26° to 22.02°, with an average of 11.94°, standard deviation 3.65. The MT1/MT5 angle was 15.04° to 39.56° with an average of 28.13°, standard deviation 4.76.

Methods: We recorded angles and differences in the lengths of metatarsi on anteroposterior X-rays. A Novel platform and its Emed software (Munich, Germany) enabled to record ground forces. We divided into ten weight-bearings zones: rear and mid-foot, the five metatarsi, the hallux, the second toe and the lateral toes. For each zone, we studied the distribution of the integral force time (IFT) and the instant of the step when the greatest force and pressure occurred. We compared those three criteria with the MT1/MT2 angle and the type of functional complaint from the patient.

Results: For the metatarsal zones, we identified four types of « baropodometric » populations depending on the radiological and clinical analysis. The asymptomatic population had maximal IFT on the medium metatarsi, and the instant of greatest simultaneous force and pressure was in the last quarter of the weight-bearing phase. The second population was the asymptomatic population with maximal IFT on the head of the first metatarsi, but the chronology of maximal force and pressure had no perturbation. The third type was a very symptomatic population with a higher IFT on MT1, for which the greatest ground force occurred very early compared with the other metatarsi (at about the middle of the weight-bearing phase). The fourth population had no systematic pattern for IFT or maximal ground forces phases.

Discussion: The development of a hallux valgus leads to an increase in the load of the head of MT1 (increase in the IFT). Then, as the deformity worsens and the meta-tarsosesamoid dislocates, weight-bearing on the first ray occurs earlier, with the diaphysis of MT1 before leading to a total disorganisation of the chronological phases of the forefoot.

Conclusion: Dynamic baropodometric study of the fore-foot can predict if a hallux valgus will worsen, and if our correction will remain stable.

Purpose: This prospective study focused on an interhospital collaboration for foot and ankle surgery. Collaboration was organised between the referring surgeon and four regional foot and ankle specialists. We evaluated concordance and discordance between expert opinions.

Material and methods: Patients for whom an opinion was requested were selected by the requesting surgeon based on problems involving diagnosis or therapeutic indications. Opinions were requested by email. Individual protocols were established for the clinical report and x-ray file of each type of condition. The final therapeutic decision was made by the requesting surgeon.

Results: Among the 450 patients seen for foot and ankle disorders, opinions were requested from experts for 30. The conditions involved: the forefoot (46%), the middle foot (16%), the hindfoot (7%) and the ankle (31%). Mean time for the response was eleven days (1–60). Experts responded to all requests (120 responses) but in four cases (3%) could not provide an opinion. The index of diagnostic agreement among the experts was 3.2/4. The index for therapeutic indications showed agreement at 2.6/4. Agreement between the therapy proposed to the patient and that proposed by the experts was 2.6/3.

Discussion: We analysed the advantages for the patient, the responsibility of the requesting and responding surgeon, and the problems related to remuneration of this type of counselling. Compared with other technologies, email was found to be simple, reliable, and low-cost with good quality images. This work showed that there was concordance between the opinions and that electronic expertise counselling is certainly very useful for foot disorders. Requests addressed to several experts increases precision and provides complementary information for difficult cases. It is important that the different participants know each other.

Conclusion: This work is the first step towards the development of a care network for foot and ankle disease enabling graduated patient management.

Purpose: Constitutional factors responsible for hallux falgus and hallux rigidus remain unclear. The purpose of this work was to compare the radiological feature of the forefoot in three populations with “normal” feet, hallux rigidis, and hallux valgus.

Material and methods: One standard protocol was used within the same unit to obtain dorsoplantar AP views of the foot in the standing position in all subjects. Fifty “normal” feet, with no apparent deformation, callosity, or pain, were selected among the orthopaedic unit personnel; mean age of the 25 subjects was 30.3±9.6 years, and 44% were women. The 30 patients with hallux rigidus were operated on at a mean age of 57.4±10.7 years, and 48.4% were women. The 50 patients with hallux valgus were operated on at a mean age of 50.8±12.8 year and 92% were women.

All radiograms were digitalised (Vidar VXR-12 plus) and analysed by four observers using the FootLog software which provides semiautomatic measurements. The following parameters were recorded: distance between the lateral sesamoid and the second metatarsal (LS-M2), the M1P1 angle (for the diaphyseal and mechanical axes of M1), the diaphyseal and mechanical distal metatarsal articular angle (DMAA) of M1, Meschan’s angle (M1–M2–M5), the distance between a line perpendicular to the axis of the foot drawn through the centre of the lateral sesamoid and the centre of the head of M4 (MS4–M4) (a corrective factor was introduced for the MS4–M4 distance to account for the displacement of the lateral sesamoid in hallux valgus), the M1 index = d1-D2 (length of the head of M1/MS4 – length of the head of M2/MS4), maestro 1 = d2–d3, maestro 2 = d3–d4, maestro 3 = d4–d5. The measured parameters were recorded automatically on an Excel data sheet and statistical analysis was performed with SPSS 9.0.

Results and discussion: Intra- and inter-observer reproducibility of measurements and morphological classifications were excellent. The LS/M2 distance was comparable in the three populations, proving that the lateral sesamoid is relatively fixed compared with the M2 and enabling its use as reference for the MS4 line. The Meschan angle did not discriminate between the three populations, likewise for the mean M1/M2 index, the M1P1, M1M2, and DMAA angles which were different in the three populations; there were 2° to 3° variations for the mechanical or shaft axis. The morphotype analysis demonstrated objective evidence of morphological differences of the forefoot in the three populations. The hallux rigidus group showed a predominance of the index plus and plus-minus with long M23 lateral patterns, while the hallux valgus group exhibited a predominance of M4M5 hypoplasia.

Discussion: Morphotypic definition of the metatarsals is an interesting approach providing a measurable way of interpreting forefoot disorders and guide surgical correction. These results should be confirmed with measures in larger series, which can be accomplished with FootLog software. It would also be useful to combine radiological studies with baropodometric studies.

Purpose: The growing use of foot surgery includes many innovating techniques which require adequate evaluation. To facilitate evaluation, the Association Française de Chirurgie du Pied (AFCP) elaborated a computer program for acquisition of clinical and radiological data on foot surgery. The data collected were centralised and analysed to assess surgical procedures.

Material and methods: Clinically. Signs of forefoot disorders were reviewed and classed by surgeons with extensive experience in forefoot surgery. Signs were classed by topic then formulated for the computer display to facilitate input during consultations. A system of profiles was designed to limit the data input filed and shorten input time. The program includes an automatic calculation of the Kitaoka forefoot score.

Radiologically: The system includes a tool for analysing radiographs using a vectorial drawing software integrated in the database. This system uses remarkable landmarks chosen by clicking on the radiographs: angles and lengths for preoperative planning are calculated automatically. These values are automatically integrated into the database and can be retrieved for file studies.

Operation report: Procedures performed on the forefoot are presented in picture form with clinical data. A profiles system is used to choose the items for input and reduce entry time.

Printout: Printouts can be made to include in the patient’s files.

Exploitation: Data can be exported for processing with another programme. This function was tested with a dissertation written on Weil osteotomies.

Conclusion: This freely distributed software is a first step toward a computer evaluation system for foot surgery. Our hope is that sufficient data can be collected to validate the reliability of our surgical techniques.

Purpose: Plantar pressure sores can lead to metatarsalgia depending on the patient’s activity level and age and on the status of the muscle-tendon system and the morphology of the forefoot. In 1995, Tanaka and Maestro attempted to quantify the relative lengths of the metatarsals. The purpose of this work was to check the results reported by Maestro and to try to define a morphotype classification of the metatarsals.

Material and methods: We analysed two series of normal feet: no apparent deformation, no callosity, no pain, no history of trauma or surgery. Fifty “normal” feet were selected among the personnel of the orthopaedics unit. Mean age of the 25 subjects was 30.3 ± 9.6 years, 44% were women. This series was compared with 34 “normal” feet reported by Maestro (age 55.2 ± 17.2 years, 62% women) used to define criteria for geometric progression (1995). A standing dorso-plantar radiograph was obtained with the same protocol for all patients. All radiographs were digitalized with a Vidar VXR-12 plus, then analysed by two observers with the semi-automatic FootLog measurements. The following measurements were recorded: SM4-M4 (distance between the line passing through the centre of the lateral sesmoid and perpendicular to the foot axis and the centre of the M4 head), M1 = d1 – d2 (length of the M1/SM4 head – length of the M2/SM4 head), Maestro criteria 1 = d2 – d3, Maestro 2 = d3 – d4, and Maestro 3 = d4 – d5.

Results: An SM4 line passing through the mid third of the M4 head (+2mm proximally / centre M4 head / −4 mm distally) as normal. The notion of row 2 geometric progression was conserved by tolerating 20% variation (Maestro 1 ± 1 mm, Maestro 2 ± 1mm, Maestro 3 ± 2 mm). Feet were classed in four metatarsal morphology types with subgroups: normal feet (line SM4 passing through the mid third of the M4 head – geometric progression) – long M23 (SM4 line centred on the mid third of M4 – but alteration of the geometric progression) with four subgroups (long M2, long M3, long M2-3, long M23 long 2) – M4M5 hypoplasia (distal SM4 line / at mid third of M4) with four subgroups (by geometric progression: long M2, long M23, long M23 long M2) – others (long M1: M1 > 3.3 mm causing distalization of SM4).

Discussion, conclusion: FootLog enables rapid radiographic measurements with excellent precision and intraobserver (variations from 0.1 to 0.2 mm and 0.1 to 0.5°) and interobserver (variations from 0.1 to 0.5 mm and 0.1 to 1°) reproducibility. In the two series of clinically “normal” feet, the measured parameters were strictly comparable. Radiologically, 31% were “normal”, and the others (30% long M23 – 37% M4M5 hypoplasia – 2% others) could be considered as predisposed to potential forefoot disorders. Finally only 48% of the subjects had the same morphotype for both feet. This study adds further precision to earlier qualitative evaluations of the forefoot architecture.