OUTCOME OF ACCELERATED PONSETI TECHNIQUE IN THE

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OUTCOME OF ACCELERATED PONSETI TECHNIQUE INTHE TREATMENT OF IDIOPATHIC CLUBFOOTByDR. A. RAGHU VEER CHANDER M. B. B. SDissertation submitted toTHE TAMILNADU DR.M.G.R. MEDICAL UNIVERSITY,CHENNAI,In partial fulfilment of the requirements for the degree ofMASTER OF SURGERY IN ORTHOPAEDICSUnder the guidance ofDr. B. K. DinakarRai., M.S. (ORTHO) ,Professor & HODDEPARTMENT OF ORTHOPAEDICS,PSG INSTITUTE OF MEDICAL SCIENCES AND RESEARCHCOIMBATORE20141

DECLARATION BY THE CANDIDATEI hereby declare that this dissertation entitled “OUTCOME OFACCELERATED PONSETI TECHNIQUE IN TREATMENT OFIDIOPATHIC CLUBFOOT” is a bonafide and genuine research workcarried by me under the guidance of Dr.B.K. DinakarRai, M.S Ortho,Prof and HOD, Department of Orthopaedics, PSGIMS & R, Coimbatore.Place:Date:Dr. A. Raghu veer chander2

CERTIFICATE BY THE GUIDEThis is to certify that the dissertation entitled “OUTCOME OFACCELERATED PONSETI TECHNIQUE IN TREATMENT OFIDIOPATHIC CLUBFOOT”is a bonafide work done by Dr. ALLURIRAGHU VEER CHANDER in partial fulfilment of the requirement forthe degree of M.S. (Orthopaedics)PlaceDateDr.B . K. DinakarRaiM.S. (Ortho)Professor & HOD,PSG IMS&R,Coimbatore.3

ENDORSEMENT BY THE HOD/PRINCIPAL OF THE INSTITUTIONThis is to certify that the dissertation entitled “OUTCOME OFACCELERATED PONSETI TECHNIQUE IN TREATMENT OFIDIOPATHIC CLUBFOOT” is a bonafide research work donebyDr.ALLURI RAGHU VEER CHANDER under the guidance ofDr.B.K.DINAKAR RAI, M.S (Ortho),Professor & HOD, Departmentof Orthopaedics,PSGIMS&R,Coimbatore.Dr. RAMALINGAMDr. B.K.DINAKAR RAIPrincipal,Prof. and HOD,PSGIMSR& R,Department of OrthopaedicsCoimbatore.PSGIMSR& R,Coimbatore.DateDatePalcePlace4

AcknowledgementAt the outset. I thank the god for giving me the strength to perform all myduties.It is indeed a great pleasure to recall the people who have helped me inthe completion of dissertation .naming all the people who have helped mein achieving this goal would be impossible, yet I attempt to thank aselected few who have helped me in diverse ways.I acknowledge and express my humble gratitude and sincere thanks to mybeloved teacher and guide Dr.B.K.DinakarRai, M.S (Ortho), Professor& HOD,Department of Orthopaedics, PSGIMS&R,Coimbatore for hisvaluable suggestion,guidance,great care and attention to details, that hehas so willingly shown in the preparation of this dissertation.I owe a great deal of respect and gratitude to my professor,Dr.ShyamSundar M.S (Ortho) for his whole hearted support forcompletion of this dissertation.I also express my sincere thanks to Associate professors h,DNB,Dr.Chittaranjan M.S (Ortho) department of orthopaedics, PSGIMS&R,Coimbatore for their timely suggestions and all round encouragement.5

I am immensely indebted to my wife, daughter, parents and In-law’s fortheir continuous support without them this study couldn’t have beenreality.My sincere thanks to the staff especially Mr.Murugesan (plastertechnician), post graduate colleagues and my friends for their wholeheated support.Finally I thank my patients and parents of the patients who formed thebackbone of this study without whom this study would have not beenpossible.6

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9PLAGIARISM CHARTCHART

TABLE OF CONTENTSS.NO.TITLEPAGE NO.1.INTRODUCTION2.AIMS AND OBJECTIVES3.REVIEW OF LITERATURE4.MATERILAS AND METHODS5.OBSERVATION AND RESULTS6.DISCUSSION7.CONCLUSION8.CASE IMAGES9.PROFORMA10.BIBLIOGRAPHY11.MASTER SHEET10

Outcome of accelerated ponseti technique in the treatment ofidiopathic clubfoot.Dr. A.Raghu veer chander: reg. no: 22111712ABSTRACTIntroduction:The standard Ponseti method described for the treatment of idiopathic CTEVrequires a serial manipulations and castings at weekly intervals. Fewpublished results stated that correction can be achieved in a shorter period oftime with multiple manipulations and castings per week.Objective:This study was to evaluate the outcome of accelerated ponseti techniquefor idiopathic clubfoot by manipulations and casting done twice a week.Materials & methods:The study included the modified group 21 patients with 25 idiopathic clubfeettreated with the accelerated Ponseti method twice a week.Results:The average age of the patients at the time of treatment was 21days.All aspects ofthe deformity with the exception of the equinus were corrected in average of 14days and average of 4.71 casts with one case of relapse, 7 cases only requiredtenotomy for correcting equinus.Conclusion:The accelerated Ponseti method of treatment program with twice a weekmanipulation and casting is safe and effective. It significantly shortens thetimeframe for the treatment and compliance of parents towards the treatment.The results obtained in our study showed good correction of deformity invery shorter period of treatment when compared to standard method, whichhelps reducing economic concerns, cast complications and improving patientscompliance.

INTRODUCTIONCongenital talipes equino varus is the most common congenitalfoot disorder.Talipes is derived from Latin word talus meaning ankle and pesmeaning foot (the deformity causes the patient to use ankle as foot).It is also called clubfoot as it resembles to the club of a golf stickIncidence of idiopathic clubfoot is about 1-2 per 1000 live births.The severity of the deformity may vary from very mild to completelyrigid foot.Clubfoot may also present with conditions like neuromusculardisease, arthrogryposis. Etc., among all, idiopathic clubfoot is thecommon presentation which occurs in otherwise normal infants.Female to male ratio is of 3:1 and about 40% cases are bilateral.Etiology of clubfoot has been explained in many theories amongthem first described was mechanical theory by Hippocrates.Neuromuscular theory, histological theory, germplasm theory,theory of retraction fibrosis, arrested foetal development, hereditary andso on.11

No theory has explained clearly the response of clubfoot to thetreatment given.Club foot incidence in India is 0.9 per 1000 live births; a higherassociation of family history is noted in patients with clubfoot.The anatomic abnormalities associated with clubfoot are equinus atankle, equinus and inversion at subtalar joint; medial migration of naviclewith prominent talar head dorsolateral.The main goal of any management regimen is to correct all thedeformities and to achieve a pain free, functional, plantigrade foot withgood mobility.Many treatment methods are described for the management ofclubfoot. Ranging from strapping, stretching & casting, surgical releaseof soft tissues, bony procedures and finally arthrodesis.12

AIMS AND OBJECTIVES The aim of the treatment of idiopathic clubfoot is to achieve painfree, flexible, plantigrade & cosmetically acceptable foot. Many treatment modalities are described to achieve the correctionof all deformities and each treatment has its own drawbacks and inmost of the modalities all the deformities are not correctedcompletely. Among the treatments described, Ponseti method of manipulationand serial casting is the most acceptable treatment method atpresent day. The present research is to analyze the outcome of acceleratedponseti technique in the management of idiopathic clubfoot,thereby reducing the course of casting treatment.13

REVIEW OF LITERATUREIt will be interesting to trace the history of clubfoot. Even beforeHippocrates described this condition in 300 BC, ancient Egyptiansdocumented clubfoot deformity in their wall paintings.The term ‘talipes’ was proposed by Little in 1839 derived fromLatin –talus means ankle, pes means foot.In the middle of 17tth century Arcaeus, Pare and Fabrigrecommended repeated stretching of foot by the use of a mechanicaldevice.In the 17thcentury, Nicholas Andre introduced the subject ofpreventing the deformities in children.In 18th century Cheselden of England used repeated stretching andbandaging to maintain correction, the bandage was made of severalpieces of linen rag in a mixture of egg white and flour.In 1782 Lorenz in Frankfurt did subcutaneous tenotomy of thetendoachilies and Stromeyer (1831) popularized it.In 1796 Bruckner first recommended forcible manipulation.14

In 1803 Scarpa described pathological anatomy in memoir on thecongenital clubfoot in children.In 1838 Guerrin reported the use of plaster of paris in thetreatment of clubfoot.In 1857 Solly performed the first bony procedure in CTEV. Heremoved part of cuboid in an attempt to correct the deformity with limitedsuccess, subsequently Dillwyn-Evans modified the operation by doingosteotomy of cuboid.In 1866 Adam differentiated the acquired talipes equino varusfrom the congenital variety. He also noted that the head and neck of talusdeviated medially. He felt that this was a secondary adaptive change andnot a primary defect.In 1872 Lund did talectomy for clubfoot.H.O Thomas from Liverpool used a wrench to forcibly manipulateand correct the deformity, which was discarded later.In 1890 Phelps introduced open surgery in which he released allstructures on the medial side of the foot.In 1892 Washington and Hughes stated that pathological anatomyof clubfoot is due to germplasm defect of the head of the talus.15

In 1896 Roentgen invented the x-rays which made little differenceto the treatment of clubfoot, since the standard radiographic views havebeen described only recently.In 1906 Codvilla described medial soft tissue release.In 1908 Robert Jones carried out osteotomy and resection of tarsalbones to correct CTEV.Denis–Brown described wedge resection of talus from the lateralside and also recommended section of the metatarsal bones to correct theforefoot adductionDwyer advanced his views on calcaneal osteotomy to correct theinverted and equinus heel.In 1930 Kite popularized non operative treatment with serialmanipulation and plaster cast immobilisation.In 1930 Brockman in his classic monogram described the morbidanatomy of clubfoot and also described the two stage soft tissue releasefor correction.In 1934 Denis–Brown renewed interest in mechanical pressure asa cause of deformity, he advised forceful manipulation before applicationof D-B splint.16

In 1947 McCauley reported about the treatment of clubfoot .hestated that x-rays standards of correction are more reliable than clinicalappearance.In 1950‘s Ignacio Ponseti introduced a new method ofconservative treatment, he used head of talus as the fulcrum forcorrection.In 1960 Bost asserted the importance of releasing contractedplantar structure in recurrent clubfoot.In 1979 Turco carried out one stage posteromedial release withinternal fixation.In 1983 Ghalie et al advocated the correction of hindfoot andforefoot deformity by the plantar release surgery at one stage.In 1987 Simons described total subtalar release based on mckay’sconcept.French methods – physical therapy and tapingBensahel (1990) and Dimeglio (1996) described method ofphysical therapy, continuous passive motion machine, splinting.17

Etiology of club foot:Various theories were proposed to explain the etiology ofidiopathic clubfoot, however there were no consensus regarding the exactetiopathogenesis of the clubfoot deformity.Several theories proposed are:1) Theory of arrest of development.2) Theories based on genetic concepta) Multifactor inheritanceb) Inheritance in Mendelian fashionc) Chromosomal abnormalitiesd) Defects in germplasm.3) Environmental Factorsa) Mechanicalb) Maternal and nutritional defectsc) Infectious diseases during pregnancyd) Toxic factorse) Maternal metabolic disorders18

f) Maternal pelvic irradiationg) Maternal hormonal factorsh) Unknown factors4)Myogenic theorya) Neurogenic theoryb) Myodystrophic5) Atavistic theory6) Archiopterygial19

Pathoanatomy:The main joints involved in clubfoot are the ankle joint and thejoints of the foot. The exact nature of the deformity in club foot is stillcontroversial. Kites quote from Ecclesiastes (200 BC) is most apt: howthe bones do grow on the womb of her is with child 1. Most authorsconsider the principal deformity to be congenital dislocation of thetalonavicular joint” but it may be possibly better considered to be fixedexaggeration of the normal equinovarus position. The major deformity isbelieved to be an inward rotation of the whole foot upon the talus. Thisrotation takes place primarily at the talocalcaneonavicular joint but also atthe calcaneocuboid joint.2Most of the information about the pathoanatomy in cases of clubfoothas been obtained from1) Cadaveric studies of human fetus having clubfoot.2) Samples of muscles and bone obtained during surgeries in case ofclub foot 2.20

Routine radiographs yield only truncated information as theinfants’ foot is only partially ossified. They do not solve the problemwhether the skeletal abnormalities are primary or whether soft tissueabnormalities and muscle imbalances produce the changes seen in clubfoot. Now most of the workers believe that the soft tissue abnormalitiesare the main cause of the deformities in club foot and that the bonychanges occur secondary to the soft tissue abnormalities. 2Antonio Scarpa (1803) in his ‘memoria chirurgica sui piedi toricongeniti’ described the “twisting” of calcaneum, navicular and cuboidaround the talus as a “congenital dislocation of talonavicular joint”. Hebelieved that anomalies of the muscle, tendons and ligaments of the footand leg are secondary to the skeletal deformity 3Adams (1866) called attention to abnormal shape of the head andneck of the talus which he felt was the result rather than the cause ofdeformity.4Elmslie (1920) Bohm (1935) Bechtel and Mossman (1950) andsettle (1963) said that the chief factor in the various parts of thedeformity was inward and plantar obliteration of neck of the talus. 5,6,7,821

Ober (1920) – described outward rotation of the tibia andbackward displacement of the lateral malleolus, the os calcis beingsubluxated or rotated inwards beneath the astralagus, the position thenmaintained by muscle spasm10.Brockman (1930) - showed congenital atresia of talonavicularjoint leading to talonavicular subluxation medially.9Mau (1930) proposed neuro-muscular contracture i.e., thecontractures of the adductors and invertors of the foot as the cause inspiteof lack of histological proof.11Scherb (1940) showed abnormal insertion of the peroneus brevisto the extensor digitorum brevis and abnormal insertion of tibialis anteriorand posterior.12Irani and Sherman (1963) found that the neck of the talus wasalways short and sometimes not identifiable so that the head seemsdirectly fused to the body of the talus. The angle which the fore part ofthe talus made with the body was 155 to 135 degrees (normal 150 – 155degrees) .They also found that the anterior portion of the talus was rotated22

in a plantar direction so that the auricular surface no longer faced directlyforwards.13Evans (1961) felt that the essential abnormalities lie in the midtarsal joints.14Kleger (1962) – reported that in severe deformity the navicular andsustentaculum tali almost articulate with medial malleolus, a thickfibrocartilagenous disc is often interposed between malleolus and thetarsal bones .He also stated that there is external tibial torsion.Dwyer (1963 – 64) showed that the heel was small and thecalcaneus is major element which prevents complete correction andpromote relapse. The calcaneal tendon is continuous with plantar fasciaand because the plantar fascia was not properly stretched by weightbearing; it gets contracted and produces pes cavus deformity. 15Vincent j. Turco (1971) – fibrosis of the medial structures forms amass of indistinguishable scar tissue on the medial side so that it obscuresthe mid tarsal and subtalar joints. This maintains the tuberosity of thenavicular and sustentaculum tali in close proximity to medial malleolus.In the resistant foot, the mass of scar tissue prevents the forward and23

anterior migration of the navicular and the eversion and lateral movementof anterior end of calcaneum. 16Waisbrod (1973) – found deformity of the talus which can’t becorrected by manipulation as most striking finding. There was alsoabnormal insertion of the tibialis posterior tendon. Ossification centreswere small and eccentric in the clubfoot but normal in unaffected foot.17Catterall (1984)18– considers the foot to consists of two rays alateral ray formed by the os calcis and fifth metatarsal and medial rayconsisting of talus, navicular , medial cuneiform and first metatarsal. Thetwo rays are connected by a link mechanism. The center of rotation is theinterosseous ligament. When the foot is placed in equino varus, the lateralray tends to lie underneath the medial ray and various structures adapt byshortening. In the plantar flexed position, the talus moves out of the frontof the mortise and is also medially rotated around a vertical axis. Whenthe foot is dorsiflexed, there is external rotatory movement of the oscalcis under the talus so that approximately 70% of rotatory movement ofthe foot occurs in relation to tibia. In clubfoot the structures preventingthe rotation are calcaneo – fibular ligament and peroneal retinaculartissue, these forms the posterolateral tether. To allow normal movements24

of the medial ray on the lateral ray the under surface of the body linkmust be released.Clinical featuresTalipes, the term initially was applied indiscriminately to alldeformed feet. In 1839, little proposed the generic term talipes - derivedfrom the Latin talus (ankle) and pes (foot) – to describe all footdeformities stating “I have proposed to employ the classical word talipesas a generic term, to include all those deformities of the foot produced bycontraction of certain muscles and to use the term varus, valgus andequinus to designate the specific forms of these disease”. Thus clubfootbecame talipes equino varus, a definition that is universally accepted. 19The typical clubfoot consists of a deformed foot in equinus, varus,and adduction and in some cases a cavus component. Varying degree ofseverity can be seen in the new-born, in addition to varying degree ofassociated rigidity .some feet which are extremely rigid, are usuallysmaller, stubby with a short first metatarsal ray. Feet that are less rigidand more pliable on manipulation are usually longer than those rigiddeformities. Deformities that can be almost fully corrected on initialmanipulation should be considered mild positional deformities. Equinus25

deformity of the foot is accompanied by an inversion of the heel,adduction and varus of the forefoot. The medial border of the foot isconcave and elevated and its plantar surface faces upwards; the lateralborder of the foot is convex and depressed downwards. The posteriortuberosity of the heel is pulled upward, inverted, difficult to palpate andless visible. The older child may have a callosity on the dorsal aspect ofthe fifth metatarsal. The bony prominence visible and palpable on thedorso-lateral aspect of the foot is the talar head, which are partiallyuncovered because the navicular and the calcaneum have been displacedmedially. 2, 14Stiffness or limitation of motion in joints other than the feetindicates bad prognosis because they often signify limited forms ofarthrogryposis. Short and very rigid clubfeet may be the onlymanifestation of peripheral arthrogryposis. 2, 14Skin abnormalities:The skin on the dorso-lateral aspect of the foot is usually stretchedout, thin and atrophied. Some feet have a deep cleft on the medial plantarsurface usually they have a severe cavus deformity with a fore footcontracture. Some feet that are rigid and have a severe equinovarus26

deformity also have a single deep cleft in the skin just above the heel andthe prominence of the heel is obscured. The skin along the medial aspectof the foot below the medial malleolus is contracted and ‘notoriouspoorly nourished’ an important consideration in surgical treatment.2, 14The knee and lower leg:At birth knee appears normal with the usual knee flexioncontracture. A hyper-extension at the knees become evident later as aconsequence of a fixed equinus deformity of the foot. Genu valgum iscommoner in the older child with a severe uncorrected bilateralequinovarus deformity: this is a compensatory acquired adaptation as thechild attempts to place the more deformed foot in a plantigradeposition. 2, 14The ankle:In the normal foot, the ankle mortise faces slightly laterally. In theclubfoot this external rotation of the mortise is increased. In resistant feet,this lateral orientation of the tibiofibular unit increases with age. Anotherfactor is the child’s attempts to compensate for the varus adductiondeformity of the foot by rotating the leg externally on the weight bearingand walking. The lateral malleolus is palpable posteriorly, which is to be27

expected with the increased external rotation of the mortise. The medialmalleolus is usually underdeveloped and appears to be slightly anterior toits normal position.2,14Components of the deformity2, 14Equinus: The foot is fixed in plantar flexed position. Equinus atthetalocalcaneonavicular complex, and plantar flexion of the forefoot.Varus: The hind foot is rotated inwards. This occurs primarily at thetalocalcaneonavicular joint. The whole tarsus except the talus, is rotatedinwards with respect to the lower leg. Since the forefoot follows theinverted hind- foot, its medial border faces upwards, there by contributingto the composite varus deformity.Adduction: The foot is rotated inward. This medial displacement occursat the talonavicular and the anterior subtalar joint. In addition somemedial deviation occurs at the tarso-metatarsal area and contributes to thedeformity.28

Cavus: The fore foot plantar flexion which Brockman described asplantaris causes a cavus deformity and also contributes to the compositeequinus.Osseous deformitiesMany investigators have observed that the overall size of all tarsalbones is smaller in the clubfoot than in normal foot thus producingasymmetric size in a unilateral deformity. Both legs are usually equal inlength.1429

The Talus – While the talus is the least displaced, it undergoes the mostsevere and consistent changes in form. The talus has no muscleattachments and is passively forced into equinus by its articulations andattachments to the calcaneum and navicular.14Body of the talus – In the equinus position, only the posterior half of thetrochlea articulates with the tibia; the forward portion of the trochlea isout of the mortise anteriorly. In a club foot the anterior wider portion ofthe body probably never enters the ankle joint, therefore this portion ofthe trochlea never have the opportunity to respond to physiological stress.As a consequence the anterior trochlea is prone to develop the adaptivemorphological changes.14Neck of the talus:-The most important constant distortion is found in theneck and head of the talus. Normally, the long axis of neck and head oftalus is directed slightly medially in relation to body of talus (about 150degrees) in clubfoot the medial deviation if the neck and head is increasedto form a more acute angle with the axis of the talar body; the degree oftalar deviation is quite variable (115 to 130 degrees).In addition, the neckis foreshortened and the usual constriction of the neck is absent. This30

heaping up of bone in this part of the trochlea and neck of the talus, plusthe medial deviation of the neck, form a bony mass that impinges on theanterior lip of the tibia in dorsiflexion; thus the entrance of the talus intothe mortise is impeded, contributing to the equinus deformity.14Head of the talus:-The round head of the talus normally faces forwardsand is covered by the concave surface of the navicular. In the clubfoot,the head of the talus and the facet for the navicular face medially, thetalonavicular articulation is oriented in a more sagittal plane compared tonormal coronal orientation. The head of the talus is usually broader thannormal with varying degrees of distortion. Correlating the talar headdeformity with prior treatment suggests that some of the distortion maybe attributed to iatrogenic compression of the cartilaginous anlagen bymanipulative treatment.14Bio-kinematics:The correction of severe displacements of the osseous structures in CTEVrequires a good knowledge of the functional anatomy of talus.There are controversies regarding axis of motion of subtalar joints.According to Farabuef, Virchow H, Huson and Siegler, there is nofixed axis of motion of subtalar joint. This is in contrast to the concept by31

Hicks, Elfnan and Inman which emphasis that subtalar joint movesaround a fixed axis. 2A better understanding of the tarsal mechanics in the normal footwas given by Huson in his thesis “A functional and anatomical study oftarsus”. He demonstrated that tarsal joints do not move as a single hingebut rotate about a moving axis as in the case of the knee. Each joint ofthe foot has specific motion pattern of its own. These are described bymeans of discrete arcs, representing the successive portion of a particularmoving axis. This successive position is followed by a fixed patternwhich is characteristic for the joint concerned.29He described “Constrained Mechanism” in which motion of thetarsal joints occur simultaneously. If one of the joint movements isblocked the other joint movements also get blocked. The ligaments playan important role as “Kinematic Constraints” of joints apart from theirshare in forced transmission to support the elastic vault structure of thefoot.2The concept of passage of axis of rotation from anteromedial toposterolateral was given by Inman.57.32

Seigler2 described “Kinematic Coupling” as there is no separationbetween the motion of the ankle joint and subtalar joint in living objects.Motion of the foot shank complex in one direction occurs by thecombined motion of both joints. Contribution from ankle joint indorsiflexion and plantar flexion is more than that of subtalar joint whilesubtalar joint has more contribution in inversion and eversion than that ofankle joint. Both joints contribute equally in internal and externalrotation.Ponseti36 gave a new concept to the kinematics around the talus. Hedescribed that, the anterior part of the calcaneus lies beneath the head ofthe talus in clubfoot which results in varus and equinus deformity of theheel. Attempts to push the calcaneus into eversion without abducting willpress the calcaneus against the talus and will not correct the heel varus.Lateral displacement (abduction) of the calcaneus to its normalrelationship with the talus will correct the heel varus deformity of theclubfoot.He emphasized that the congenital talipes equinovarus deformityoccurs mainly in the tarsal bones of the foot, which are mostly made ofcartilage, and are in extreme positions of adduction, inversion and flexionat the time of birth. The talus position will be in severe plantar flexion,33

and its neck is medially and plantarly directed. Head of the talus head iswedge shaped. The navicle is medially displaced, and is close to themedial malleolus. Navicle articulates with the medial surface of the headof the talus. The calcaneum is in adducted and inverted position under thetalus.The tarsal joints is functionally depending on each other. Themovement of each tarsal bone involves simultaneous movement in theadjacent tarsal bones. Joint motions are determined by the curvature ofthe joint surfaces and by the orientation and structure of the bindingligaments. Every joint has specific motion pattern. Correction of medialdisplacement and inversion of the tarsal bones in congenital equinovarusrequires a simultaneous gradual lateral shift of the navicle, cuboid andcalcaneum before they can be everted and brought to neutral position.36Radiographic examination:Although radiographic examination has been used to demonstrate thedeformities of tarsal bones in clubfeet, the images are hard to reproduce,evaluate, and measure. There are several reasons for this: (1) it is difficultto position the foot, particularly when it is deformed and stiff, in astandard fashion in the x-ray beam; (2) the ossific nuclei do not representthe true shape of the mostly cartilaginous tarsal bones; (3) in the first yearof life, only the talus, calcaneus, and metatarsals may be ossified, the34

cuboid is ossified at six months; the cuneiforms, after one year; andnavicular, after three years and later; (4) Rotation distorts the measuredangles and makes the talar dome appear flattened ; and (5) failure to holdthe foot in the position of best correction makes the foot look worse thanit is on the radiograph.53,54,55,55,20.To optimize the radiographic studies, the foot should be held in theposition of best correction, with weight bearing, or, if an infant is beingexamined, with simulated weight bearing. Since the anteroposterior andlateral talocalcaneal angles (Kite’s angles)55 are the most commonlymeasured angles, the x-ray beam should be focussed on the hind foot(about 30⁰ from the vertical for the anteroposterior radiograph , and thelateral radiograph should be trans-malleolar with the fibula overlappingthe posterior half of the tibia, to avoid rotational distortion.)20For an older child, it may be useful to focus the x-ray on themidfoot as this view allows assessment of dorsolateral subluxation andnarrowing of the talonavicular joint. Lateral dorsiflexion and plantarflexion radiographs may be useful to assess the ankle motion and35

Common radiographic measurements:Three measurements should be made on the anteroposterior radiograph:(1) The anteroposterior talocalcaneal angle (usually 20⁰ in aclubfoot),(2) The talar-first metatarsal angle (up to about 30⁰ of valgus in anormal foot and mild to severe varus in a club foot), and(3) Medial displacement of the cuboid ossification cente

In 1908 Robert Jones carried out osteotomy and resection of tarsal bones to correct CTEV. Denis–Brown described wedge resection of talus from the lateral side and also recommended section of the metatarsal bones to correct the forefoot adduction Dwyer advanced his views on calcaneal osteotomy to correct the inverted and equinus heel.

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