It is also called an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). It is also called an osteochondral defect (OCD) or osteochondral lesion of the talus (OLT). When planning the treatment of osteochondral lesions of the talus, it is important to evaluate the articular cartilage to distinguish between stable and unstable lesions (1,2). H��W�n�H}�W�QZD4��}�b0�#gf$��X�}H�A�I�Di,�F�~���/����I�ou9u���o���-~������m��_}};-���jxUJ^p.��)�Ь)&�M�L��^���`���wU�:^�) 7����fVUU��n���B����ȦX쮮���v��՛p���E�[������cQ�F��8. However, when the characteristics of a lesion require the use osteochondral transplantation, an open approach with a malleolar osteotomy is a feasible option. An osteochondral ankle defect is a lesion of the talar cartilage and subchondral bone mostly caused by a single or multiple traumatic events, leading to partial or complete detachment of the fragment. See the main osteochondritis dissecans article for a general discussion on … The talus is the 3rd most common site (after the knee and elbow) of osteochondral lesions. However, in early stages, the cartilage layer is intact, and the lesions may not be seen at arthroscopy. for OCD of the talus at a major Canadian pediatric referral center. Foot Ankle. �����YL�L���>x�К`~C��W��̋]?`/```}�+��n��Y��&2����cWU�Y�]޿.%��z��)�0TL�9��0S���D �q�ό�+�8@r���5��@���[G�g_ �A.de�vJ�*�0 $+W The diagnosis of cartilage damage (osteochondral lesion, also known as talar dome) is often done with x-rays and/or an MRI. medial on the talar dome in 3. A medial talar dome injury is seen on a mortise x-ray view. Oblique osteotomy requires precision, and adverse outcomes have been reported. In 2 cases, OCL was associated with a fracture, in I the medial malleolus and in the other both nialle- oli. 1) and anterolateral (46%) talar dome (1). Unless the injury is extensive, it may take months, a year or even longer for symptoms to develop. The most common sites are the posteromedial (53%) (Fig. Alexander IJ, Watson JT. dissecans (OCD) of talus ... – Younger patient – No history of trauma – More on medial side. Osteochondritis dissecans (OCD) of the talus is rare in children. Both magnetic resonance (MR) imaging and ankle arthroscopy are excellent tools commonly used to evaluate ankle cartilage (3–5). Therefore, an osteotomy must be placed through the tibial to access the ankle. Medial talar dome lesions are typically found in the central to posterior aspect of the talar dome and are therefore often inaccessible to arthroscopic procedures and techniques. Medial lesions have been described as deeper with extension into subchondral bone, and they often develop into cystic lesions. There is an increasing prevalence of this … Abramowitz Y, Wollstein R, Barzilay Y, et al. The articular surface of these facets is contiguous with the superior articular surface of the talar dome. Contraindicated for large OCLs, limited range of motion, and narrow joints, Horizontal cut results in no perpendicular access, Difficult to fix the fragment perpendicular to the cut, Excellent congruity when the cut is made 30° relative to long axis of the tibia, Outcomes vary; fragment migration seen when fixation is not perpendicular to cut; requires precise cut 30° to tibia, Amount of exposure, advantages, and disadvantages of medial malleolar osteotomy techniques are outlined for comparison [, The Chevron-type medial malleolar osteotomy has been described several times previously [, A Chevron cut is made in the medial malleolus after predrilling the fixation holes and placing a guidewire for osteotomy direction (Illustrations copyright of and reproduced with permission from JG Kennedy MD. “Osteo” means bone and “chondral” refers to cartilage. If the cartilage does not heal properly following the injury, it softens and begins to break … 171 0 obj <>stream The lesion involved the medial aspect of the talus in 19, the lateral in 5, and the central talar dome in 3. %PDF-1.5 %���� This condition is also known as either osteochondritis dissecans (OCD) of the talus or as a talar osteochondral lesion (OCL). It can occur in all age groups. The talar dome is trapezoidal in shape, and its anterior surface is, on average, 2.5 mm wider than the posterior surface. Small talar beaking. 69% of ankle fractures. There were 10 boys and 14 girls. Standard anterior arthroscopy can access about 50 % of the talus without invading the joint space, and 75 % of the talus can be accessed with distraction, debridement, and/or arthroscopic invasion of the joint space. The average age at initial presentation was 13 years 4 months (range 6 years 7 months to 17 years 1 month). 105 0 obj <> endobj The first revealed an OCD Lesion of the medial Talar dome, an injury that affected the cartilage between his Talus and Tibia and caused him pain and a ‘catching’ at the joint. The second MRI revealed some arthritis that had caused a small bone spur to develop in the … The author has no current conflict of interests with the products presented. Outcome of resection of a symptomatic os trigonum. Step-cut osteotomy of the medial malleolus for exposure of the medial ankle joint space. focal injuries to the talar dome with variable involvement of the subchondral bone and cartilage resulting in osteochondral lesion of the talus (OLT) may be caused by traumatic event or result of repetitive microtrauma. A talar dome lesion is an injury to the cartilage and underlying bone of the talus within the ankle joint. An osteochondral lesion of the talus (OLT) is an area of abnormal, damaged cartilage and bone on the top of the talus bone (the lower bone of the ankle joint). With an MRI, the ligament structures, tendons and cartilage of the ankle can be examined and analyzed. It is often associated with a traumatic injury such as a severe ankle sprain. Although Magnetic Resonance Imaging (MRI) at 1.5 Tesla is the leading cross-sectional modality for detection and staging of OCL, … MRI images show a stage IV medial talar dome osteochondral lesion with a minimally displaced osseous fragment corresponding to the plain films. In a severe ankle sprain, usually the medial and lateral ankle ligaments bear the brunt of the trauma, but sometimes the sprain may be so severe that the talus bone is displaced resulting in trauma to the bone and in many cases may be severe enough to cause a fracture within the talus. Osteochondral defects (OCDs) of the talus remain a surgical challenge, especially after failed primary treatment. Osteochondritis dissecans (OCD) of the ankle is the end result of the aseptic separation of an osteochondral fragment of the talar dome with the gradual fragmentation of the articular surface. h��mo�6�� However, it can also occur from chronic overload … An algorithm for the approach to osteochondral lesions of the medial talar dome. endstream endobj 109 0 obj <>stream Arthroscopy. The defects cause deep ankle pain associated with weightbearing. 2003;85-A:1051–7. 2 children had had pain only and no history of a trauma. OCD typically occurs in patients between the ages of 10 and 20 years although adults can also be affected . OCD usually causes pain during and after sports. A history of acute trauma was recorded in 1 I of the 18 patients: 4 distortions, 4 falls, 2 direct traumas and 1 traffic accident. incidence. Reproduction without express written consent is prohibited), The osteotomy is fixed with two parallel screws and a third transverse screw to prevent superior migration of the osteotomy fragment (Illustrations copyright of and reproduced with permission from JG Kennedy MD. A partial fluid cleft at its posterior margin and a mild subchondral oedema suggests an unstable lesion. the talar dome) in the ankle. �m�SJm�kk=�n��Û~�D˷Vs�B3�}g�-g�K���1e�����+7;�ި��I�O�KC(�����0_U;��X^���,����%횰u�e}�i�͒t�]%i?-���$ɋr��r�h=�}@��9����i�K8D[NS����b����M�V#�/�J�Dsny�6+���h�qD�c��:�E1FB-�\mQ�-�i�o�p�X��c}A���_�C! �O!��o!�b �M�?�X���=����B�p��5��7�X�qv�����.� ��j�b,������u%6絛���ŌU?�X_���������a�c�������Rz��+��]��}��uﰂ>O��k����`��W��R����T�I�2lAU���׻�jmm�Ҫ0| �� 9����$��z�, �M����GҎN�g��e�ݞ��eBm�W��}���}IHg`���-"7�1�\�P�,�rU��y�l��]��*������]���*���|y���W�(�]sS��"+�n�ݺ�Xݿ�%���c�&u4�9.��Q����}.£")ͱ���2�Ӽ��'��6���Gi����C��� YV Epidemiology. Impaired function, limited range of motion, stiffness, catching, locking an… %%EOF In addition, there is a risk of fragment migration when fixation screws are not applied properly [. Medial talar dome OCD. An osteochondral lesion of the talar dome is a condition characterized by damage to the cartilage and / or bone surfaces of the upper (superior) aspect of the talus bone (i.e. “Osteo” means bone and “chondral” refers to cartilage. While the patient's radiographs demonstrated the osteochondral defect of the medial talar dome, radiographs may not always adequately show osteochondral defects, especially in the early stages following injury. Decision making is based on size, characteristics, and location of the lesion as well as type of surgical treatment. Osteochondral lesions (OCL) of the talus involve both articular cartilage and subchondral bone of the talar dome. 1 article features images from this case. The discrepancy of naming may be attributed to historically varied opinions of the pathogenesis. Treatment principles of osteochondral lesions of the ta… Most cases of OCD usually follow a twisting injury to the ankle and are actually fractures of the joint surface. Ankle – 4 percent of patients, particularly the talar dome (57 percent medial and 43 percent lateral) . Patients can have three different kinds of complaints, whether or not in combination: 1. Talar dome lesions are usually caused by … :\6U�p4�+��n �sY�_MX_��v�߂�b���v��|��#q�i�x=���#xQ{/02p���|��_�f�B1�z�U��\x�� .p�5ij�Z�V�d�6�]}}��'�bt�OU���(y1z?�@�������ܣ�ϯ��&c��?�K���oǴ���A���O� o��xע�m���bJv�D�h�NkW�5�}G��6��Fn�. OCL location and characteristics must therefore be considered when planning the surgical approach (Fig. Lateral lesions, which are more commonly associated with a traumatic injury, are described as shallow and have the tendency to become displaced. As such, the term encompasses a variety of pathologies, including: osteochondritis dissecans, osteochondral defects, and osteochondral fractures. mechanism of injury that causes talar dome fractures. Reproduction without express written consent is prohibited), The osteotomy cut is terminated just prior to reaching the subchondral bone and completed with an osteotome (Illustrations copyright of and reproduced with permission from JG Kennedy MD. Re: OCD lesion of medial talar dome Thanks for the tip on the sticky and Thanks again LivesNearStore for the link! The oval is the starting point, each rectangle is a factor in the decision-making process, and each rhombus is a selected approach and end point . The bone lesions on the lateral or outside portion of the talus are most often related to trauma. Figure 1 Relevant Anatomy for an Osteochondral Lesion of the Talar Dome Radiography cannot directly depict the cartilage surface (3). It is often associated with a traumatic injury, such as a severe ankle sprain. Osteochondral lesions of the talus (OLTs) are lesions of the articular cartilage of the talus and underlying subchondral bone. Defined as a separation of articular cartilage from the talar dome, with varying amounts of subchondral bone. Image 1 shows access to the ankle through the tibia and site preparation of the talar dome. h�b``�f``������.€ [ 55 ] Arthroscopic treatment of OLTs can be accomplished by using wide-angle 2.7-mm arthroscopes, which provide more maneuverability than the older 4- … Conflict of Interest. Other joints – Approximately 15 percent. The oval is the starting point, each rectangle is a factor in the decision-making process, and each rhombus is a selected approach and end point. The medial and lateral articular facets of the talus articulate with the medial and lateral malleoli. [Picture 1] Additional investigation (CT/MRI): CT with flexion of the ankle : osteochondral defect of the anteromedial and centromedial talar dome with cyst formation on the anterior side, 2.2cm anteroposterior size and 14mm mediolateral size. OLTs have been known historically by varied nomenclature, including osteochondritis dissecans, talar dome fracture, transchondral fracture, and flake fracture. *���u7u��pD{{D=^��׊#�Om���O+����h|��m�҇��1�j?�OI{�W��`��V�&ܦ�Hg��ʹ�����X��ٔ�C�b�����Յ�;�( �-��f�\z���O�m0_4R�.�E7'ےz��4Ax�!X�n����uƾ� ܩnm������ܘ���n�n�5��x���5T-�J�ADP� �t���,_�_;�;†��6��X���X��I��X�|� This case demonstrates an osteochondral defect involving the medial talar dome. endstream endobj 106 0 obj <>/Metadata 3 0 R/Outlines 7 0 R/PageLayout/SinglePage/Pages 103 0 R/StructTreeRoot 10 0 R/Type/Catalog>> endobj 107 0 obj <>/ExtGState<>/Font<>/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 108 0 obj <>stream Case Discussion. This approach is recommended when preoperative imaging indicates an OCL is in an accessible location and does not require full visualization or open treatment [, A medial malleolar osteotomy should be avoided when an arthroscopic approach can provide access and allow satisfactory treatment of an OCL. … The lesion is encountered on either the medial or lateral surface of the talar dome. Most cases of osteochondritis dissecans of the talus occur around the time of skeletal maturity (10-14 years of age for girls and 12-16 years of age for boys). 3. Symptomatic osteochondral ankle defects often require surgical treatment. However, it can also occur from chronic overload due to … Bone-cartilage transplantation from the ipsilateral knee for chondral lesions of the talus. Osteochondritis dissecans (OCD or OD) is a joint disorder primarily of the subchondral bone in which cracks form in the articular cartilage and the underlying subchondral bone. This guide will help you understand 1. how OCD develops 2. how the condition causes problems 3. what can be done for your pain Decision making is based on size, characteristics, and location of the lesion as well as type of surgical treatment. A talar dome lesion is an injury to the cartilage and underlying bone of the talus within the ankle joint. Talar dome lesions are usually caused by an injury, such as an ankle sprain. It had Great information My son will have to stay in his room for much of the first part of recovery, due to the only bathrooms we have are upstairs. Type-G lesions could also stem from excessive stresses on the medial side of the talar dome, associated with vascular or metabolic modifications, leading to deep necrosis farther from the subchondral bone than in type-O lesions. This approach allows access to 80% of the talar dome while it avoids the medial malleolar osteotomy in most cases. Baltzer AW, Arnold JP. 2005;21:159–66. Two children had bilateral involvement, for a total of 26 lesions. Click to share on Twitter (Opens in new window), Click to share on Facebook (Opens in new window), Click to share on Google+ (Opens in new window), on Approach to Osteochondral Lesions of the Medial Talus, Preoperative Planning for Osteochondral Defects, Diagnosis of Osteochondral Lesions by MRI, Diagnosis of Osteochondral Defects by Arthroscopy, Diagnosis of Osteochondral Defects of the Talus by Computerized Tomography (CT) and Single-Photon Emission Computed Tomography (SPECT-CT), Talar Dome Resurfacing with the HemiCap Prosthesis, Rehabilitation After Cartilage Reconstruction. ?-[$�ih\�^�z�� N�F>(2ku$CR�d�~w��oI��ŕҽ�H�+b�J��$��}��Q����GE8C/M���p��З������)N��C���#�p& ����)j�%CM��x�,*$�j���3E�X%���y}k�o0�� ��|Xo��3�{W��z�fJ��^{���wa�rʕ�w��3|?�]��E��I����y���$̛�ݔ��4I�WS��4+{��7Qaf�1m�U:3���-��0��ǀpO ���=6.�ʚ-MȷhY����Y��FKo�ҥ��sg�|>�5� ,�x�qT|��T+�p_~��Qi�8�q٪�����]�B��A�4�/�i�J���,;k/b{|T*o�>�d�(�f���T����w����w���`��O; h�bbd```b``��@$S!�du�* ���~fk�H>%0[�V���H�(� �`ӔA$�)�|U ɸ�,nb��/_�5]��& ��H�u�]5���2�� $�����U���5A��S0�D*U��j �`�d�H�c`q�O�=�� 5� 6ȏ�K� ɯ7�20�����t%�30}x` �� � Flattening of the medial talar dome. Assenmacher JA, Kelikian AS, Gottlob C, Kodros S. Arthroscopically assisted autologous osteochondral transplantation for osteochondral lesions of the talar dome: an MRI and clinical follow-up study. J Bone Joint Surg Am. 150 0 obj <>/Filter/FlateDecode/ID[<930980570CEFAF47B7D27834AAA75355>]/Index[105 67]/Info 104 0 R/Length 194/Prev 738197/Root 106 0 R/Size 172/Type/XRef/W[1 3 1]>>stream Osteochondral defect; 13 public playlist includes this case. endstream endobj startxref 6, and 9 cases, respec- tively. These lesions can be chronic in nature, as seen in Osteochondritis Dissecans (OCD). 2001;22:544–51. Ultimately, lesion size and characteristics will impact the treatment of choice and therefore the approach used. Osteochondral lesions of the talus (OLT) bring the challenges both of articular cartilage healing and a constrained area of access in the ankle joint. Osteochondral lesions of the talar dome can cause significant functional impairment and a decreased quality of life. Foot Ankle Int. When osteochondritis dissecans affects the ankle it typically occurs on the inner or medial portion of the ankle (talus). Reproduction without express written consent is prohibited), An oblique osteotomy provides adequate visualization of the talus and good congruity when executed properly [, Arthroscopic approaches are well established, minimally invasive, and can provide access to most OCLs. Definitions • Osteochondral lesion of talus (OLT): • Only 0.09% of all fractures and 1% of all talus fractures – Traumatic etiology – Commonly: ankle sprain • Inversion injury • 6.5 per 100 ankle sprains – Bosien et al. The aim of the present study was to examine the clinical outcomes after HemiCAP ® implantation for OCDs of the medial talar dome after failed previous surgery. This condition is also known as osteochondritis dissecans (OCD) of the talus or a talar osteochondral lesion (OCL). The etiology is unknown, although trauma has been implicated, particularly in lateral lesions. 0 Initial x-rays are taken to check the alignment of the foot and ankle, as well as look for any bone damage. This term refers to a wide spectrum of pathologies including mild bone marrow contusion as well as severe osteoarthritis resulting from long standing disease. An algorithm for the approach to osteochondral lesions of the medial talar dome. Magnetic resonance imaging is typically the recommended modality for noninvasive imaging and assessment of osteochondral defects. 1991;11:242–3. � Osteochondritis dissecans(OCD) is a problem that causes pain and stiffness of the ankle joint. Medial osteochondral lesions are more common than lateral osteochondral lesions. OCDs of the talus represent damage to the articular surface of the talar dome in the ankle joint. Actually fractures of the joint surface % ) talar dome look for any bone damage term... 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Pediatric referral center defects ( ocds ) of the talar dome Thanks for the approach to lesions! At its posterior margin and a decreased quality of life ( range 6 7... The products presented defects ( ocds ) of the talar dome trauma – more on medial.. Unknown, although trauma has been implicated, particularly the talar dome injury seen. A minimally displaced osseous fragment corresponding to the ankle the talar dome ( 1 ) dome OCD although has... Either osteochondritis dissecans ( OCD ) of the medial talar dome medial talar dome ( 57 medial. Surgical challenge, especially after failed primary treatment and characteristics will impact the treatment of choice and the. As look for any bone damage, Barzilay Y, Wollstein R, Barzilay Y, et.... Although adults can also be affected are actually fractures of the talar dome in.! Of trauma – more on medial side case demonstrates an osteochondral defect ( OCD or. Months ( range 6 years 7 months to 17 years 1 month ) the. 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