Yes / Passive prosthetic devices are set up to provide optimal function at customary walking speed and thus may function less effectively at other speeds. This partly explains why joint kinetic adaptations become more apparent in lower-limb amputees when walking at speeds other than customary. The present study determined whether a trans-tibial prosthesis incorporating a dynamic-response foot that was attached to the shank via an articulating hydraulic device (hyA-F) lessened speed-related adaptations in joint kinetics compared to when the foot was attached via a rigid, non-articulating attachment (rigF). Eight active unilateral trans-tibial amputees completed walking trials at their customary walking speed, and at speeds they deemed to be slow-comfortable and fast-comfortable whilst using each type of foot attachment. Moments and powers at the distal end of the prosthetic shank and at the intact joints of both limbs were compared between attachment conditions. There was no change in the amount of intact-limb ankle work across speed or attachment conditions. As speed level increased there was an increase on both limbs in the amount of hip and knee joint work done, and increases on the prosthetic side were greater when using the hyA-F. However, because all walking speed levels were higher when using the hyA-F, the intact-limb ankle and combined joints work per meter travelled were significantly lower; particularly so at the customary speed level. This was the case despite the hyA-F dissipating more energy during stance. In addition, the amount of eccentric work done per meter travelled became increased at the residual knee when using the hyA-F, with increases again greatest at customary speed. Findings indicate that a trans-tibial prosthesis incorporating a dynamic-response foot reduced speed-related changes in compensatory intact-limb joint kinetics when the foot was attached via an articulating hydraulic device compared to rigid attachment. As differences between attachment conditions were greatest at customary speed, findings indicate a hydraulic ankle-foot device is most effectual at the speed it is set-up for.

The ankle joint complex is a common source of injury for various demographics and is often observed during gait analysis. I investigate using soft robotic sensors as a means for collecting kinematic data at the ankle joint complex. I validate the linearity of these sensors by measuring stretch against extension and against stretch from frontal and sagittal planar foot movements using a wooden ankle mockup. I then conduct a study involving ten participants who perform repetitive trials of four foot movements (plantarflexion, dorsiflexion, inversion and eversion) using ten different locations. Four optimal locations were identified for these movements based on linearity, accuracy, robustness, and consistency. Lastly, I validated soft robotic sensors against the human gait cycle. Twenty participants were recruited and performed twelve trials, walking across a flat surface and a cross-sloped surface while motion capture data and soft robotic sensor data was collected.

No description available.

Bakgrund: Lateral fotledsstukning är en av de vanligaste traumatiska muskuloskeletala skadorna och av alla som ådrar sig denna skada utvecklar upp till 40 procent något som kallas kronisk ankelinstabilitet. Det är en skadeform som förekommer inom nästan alla idrotter. Typiskt är en kraftig stukning som följs av ytterligare stukningar och instabilitetskänsla. Konsekvenser är ofta nedsatt kraft, balans och prestationsförmåga. Syftet med denna studie var således att undersöka fotledsfunktion med avseende på styrka, balans och funktionella tester hos personer med kronisk ankelinstabilitet. Metod: Studien genomfördes som en tvärsnittsstudie med tester vid ett tillfälle. Deltagare söktes via idrottsföreningar och distriktsmottagning. Totalt inkluderades 17 personer (10 kvinnor och sju män), med kronisk fotledsinstabilitet, vilka utförde fem tester för att utvärdera balans, styrka och funktionell prestationsförmåga. Testerna utgjordes av enbentstående, isometrisk styrka i inversion och eversion i liggande, samt enbent längdhopp och sidohopp.  Resultat:  Skadad sida var signifikant svagare jämfört med frisk sida i både eversion (75N respektive 92N, p=0,001) och inversion (75N respektive 85N, p=0,002). Deltagarna visade också sämre prestation, på skadad sida jämfört med frisk sida, vid enbentshopp (101cm respektive 107cm, p=0,05) samt i sidohopptestet (antal 30 respektive 39, p<0,001). Balansen var också nedsatt i skadad jämfört med frisk sida (poäng 17 respektive 11, p<0,001). Det fanns en signifikant korrelation mellan styrka i eversion och inversion (r=0,731, p=0,001). Inversion hade, utöver eversion, signifikanta korrelationer med enbentshopp (r=0,517, p=0,033), och med sidohopp (r=0,644, p=0,005). Enbentshopp korrelerade även med sidohopp (r=0,650, p=0,005). Antal sidohopp hade en hög korrelation, (p <0.01), med samtliga övriga parametrar, undantagen balans. Det förelåg ingen korrelation mellan balansen och några av övriga parametrar (p ≥0,600). Konklusion: Den här studien visar att individer med kronisk ankelinstabilitet har sämre funktion i skadad jämfört med frisk fot. Funktionell prestationsförmåga, i form av sidohopp, och balans var de variabler som var mest påverkade. Det faktum att det fanns en 50-procentig skillnad i balans tyder på att utvärdering av balans är av betydelse i denna grupp av patienter och att rehabilitering bör syfta till att förbättra balansförmågan. / Background: Lateral ankle sprain is one of the most common traumatic musculoskeletal injuries, is present in almost all fields of sport, and up to 40 percent of everyone that is injured developes something called chronic ankle instability. A typical description is a severe strain followed by more straines and a sense of instability. Strenght, balance and performance deficits are often seen consequences of the disorder. Objective: The aim of this study was to survey the function concerning strenght, balance and functional ability within this group. Methods: This study was conducted as a cross-sectional study with participants recruited through various sport clubs and at a clinical practice. A total of 17 persons with chronic ankle instability were included (10 women and seven men). The test battery consisted of five tests for assessment of balance, strength and functional performance; Single leg balance, isometric strength in inversion and eversion, single leg hop and side hop test Result: The affected side was signifikantly weaker compared to the non-affected side in both eversion (75N vs. 92N, p=0,001) and inversion (57N vs 85N, p=0,002). The same pattern was seen, with a lesser performance on the affected side in, single leg hop (101cm vs. 107cm p=0,05) and number of sidehops (30 vs. 39, p <0,001). The balance was also lesser in the affected versus non-affected side (17 vs. 11, p <0,001). There were a signifikant correlation between strenght in eversion and inversion (r=0,731, p=0,001). Inversion strenght had also signifikant correlationes with the performance in the single leg hop (r=0,517, p=0,033), and the side hop tests (r=0,644, p=0,005). Single leg hop also correlated with the side hop performance (r=0,650, p=0,005). The performance in the side hop test had high correlation, (p <0.010), with every other parameter except balance which did not correlate with any of the other tests (p ≥0,600).  Conklusion: In this study, strength, balance and functional performance were all impaired at the injured side, compared to the non-injured side. The fact that there was a 50% difference between sides in balance performance suggests that evaluation of balance is of importance in this group of patients and rehabilitation should aim to improve balance.

Made available in DSpace on 2017-07-10T14:17:04Z (GMT). No. of bitstreams: 1 Regina Kunz.pdf: 2633664 bytes, checksum: ba62a763b7744580d9ca3b1f84d6f021 (MD5) Previous issue date: 2014-02-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Immobilization is a therapeutic modality that is used in the treatment of musculoskeletal disorders, which often cause tissue morphological changes, and which can be reversed by remobilization. This study examined the effects of immobilization and remobilization on morphological parameters of the ankle joint and the soleus and tibialis anterior muscles of Wistar rats. Eighteen male rats had their right hind limb immobilized for 15 days. They were divided into the following 3 groups: G1, simply immobilized; G2, remobilized freely for 14 days; and G3, remobilized by exercises in water, performed on alternate days with progression in terms of the time and number of exercises. The contralateral limb was used as control. After the experimental period, the ankle, right (immobilized/remobilized) and left (control) joints, and the soleus and tibialis anterior muscles were processed for analysis using light microscopy. For the analysis of the ankle, three fields of distinct interest were identified in the sagittal section as follows: P1, anterior articular extremity (near the phalanges); P2, middle region of the joint; P3, posterior articular extremity. Histomorphometry revealed no significant differences between the groups and members, control and imobilized/remobilized, in terms of the number of chondrocytes and the thickness of the articular cartilage of the tibia and the talus. The morphological analysis of G1 showed the most significant degenerative lesions in the talus, such as exposure of the subchondral bone, flocculation and cracks between the middle and anterior regions of the articular cartilage, as well as the synovial membrane. Remobilization by exercises in water showed positive effects on the recovery of the ankle joint, compared with free remobilization. In the muscles, immobilization produced significant changes in the morphometric parameters of the soleus; in the tibialis anterior it only caused a change in muscle mass. However, there were changes in the morphology of the tibialis anterior, which showed polymorphic fibers and necrosis, as well as changes in the connective tissue. Swimming, combined with jumping in water, increased the smallest diameter of the fiber of the soleus muscle. Both free remobilization, and remobilization using exercises, increased the mass and the length of the tibialis anterior muscle, as well as its morphology / A imobilização é uma modalidade terapêutica utilizada no tratamento de distúrbios musculoesqueléticos que com frequencia causa alterações morfológicas teciduais, as quais podem ser revertidas pela remobilização. Este estudo analisou o efeito da imobilização e da remobilização sobre parâmetros morfológicos da articulação talocrural e dos músculos sóleo e tibial anterior de ratos Wistar. Foram utilizados 18 ratos machos, que tiveram seu membro posterior direito imobilizado por 15 dias, e divididos em 3 grupos: G1, somente imobilizados; G2, remobilizados livremente por 14 dias; e G3, remobilizados em meio aquático por 14 dias, realizados em dias alternados com progressão de tempo e série dos exercícios. O membro contralateral foi utilizado como controle. Após o período experimental, as articulações talocrurais, direitas (imobilizadas/remobilizadas) e esquerdas (controle), e os músculos sóleo e tibial anterior foram processados para análises em microscopia de luz. Para a análise da articulação talocrural, nos cortes sagitais foram identificados três campos de interesse distintos, sendo: P1, extremidade articular anterior (próxima as falanges); P2, região média da articulação; P3, extremidade articular posterior. A histomorfometria não revelou diferenças significativas entre os grupos e os membros, controle e imobilizado/remobilizado, no número de condrócitos e na espessura da cartilagem articular da tíbia e do tálus. A análise morfológica de G1 evidenciou lesões degenerativas mais significativas no tálus, como exposição do osso subcondral, floculações e fissuras, entre as regiões anterior e média da cartilagem articular; bem como na membrana sinovial. A remobilização por exercícios em meio aquático, apresentou efeitos positivos na recuperação da articulação do tornozelo, quando comparada com a remobilização livre. Nos músculos, a imobilização produziu alterações significativas sobre os parâmetros histomorfométricos do sóleo e, no tibial anterior, causou alteração somente na massa muscular. No entanto, verificou-se alterações na sua morfologia, que apresentou fibras polimórficas e em necrose, assim como alterações no tecido conjuntivo. A natação combinada com o salto em meio aquático aumentaram o menor diâmetro da fibra do músculo sóleo. Tanto a remobilização livre quanto por associação dos exercícios aumentaram a massa e o comprimento muscular do tibial anterior, bem como melhoraram seus aspectos morfológicos

Baigiamajame magistro darbe yra atliekamas apatinių galūnių įtvarų ilgaamžiškumo tyrimas. Yra iškeliama čiurnos sąnario įtvarų patvarumo problema ir sudaroma jos sprendimo metodika. Darbe yra atliekama čiurnos sąnario biomechanikos analizė, įtvarų konstrukcijų ir medžiagų analizė, nagrinėjama ilgaamžiškumo reikšmė ir tyrimo būdai. Sudaroma tyrimo metodika. Kompiuterinio modeliavimo būdu, panaudojant SolidWorks programinę įrangą, yra sudaromas įtvaro modelis, nustatomos veikiančios apkrovos, atliekami įtempių ir poslinkių pasiskirstymo tyrimai. Atliekami modelio nuovargio bandymai. Atsižvelgiant į tyrimų rezultatus, yra sudaromi įtvarų iš aukštos temperatūros plastikų tinkamo pritaikymo nurodymai. Pateikiamos išvados ir literatūros sąrašas. / Final thesis presents the research of durability of lower limbs splints. The problem of fatigue behaviour of ankle joint splint is raised and its solution is suggested. Final thesis contains ankle joint biomechanics analysis, lower limbs splints design and material analysis. Review of durability research methods is also done. The methodology of research is arranged. Using the computer aided modeling with SolidWorks software the model of ankle joint splint is created. Load parameters are determined, research of stresses and deformations are performed. Fatigue test is also performed. Due to the results of research, the instructions for ankle joint splints made of high density polyethylene and polypropylene use and adaptation are listed. Final thesis also contains conclusions and list of literature. Size of work – 77 pages of text without attachments, 55 pictures, 9 tables and 25 bibliographical sources.

Sammanfattning   Syfte och frågeställningar Syftet med denna studie var att sammanställa kvalitet på och resultat av studier som undersökt om långdistanslöpning ger artros i höft-, knä- eller fotleder. Finns det vetenskaplig evidens för att långdistanslöpning ger artros i höft-, knä- eller fotleder? Vilka styrkor och svagheter har de studier som försökt utröna om samband finns mellan långdistanslöpning och artros i höft-, knä- eller fotleder?   Metod Sökning av litteratur utfördes i PubMed, CINAHL, Cochrane Library och PEDro. Detta resulterade i att tio artiklar inkluderades för närmare granskning och sammanställning. Utifrån artiklarnas sammantagna bevisvärde poängsattes och graderades artiklarna efter evidensnivå enligt Statens Beredning för medicinsk Utvärderings (SBU) granskningsmallar för kohortstudier med kontrollgrupper.   Resultat Endast en av tio studier visar ett positivt samband mellan långdistanslöpning och artros i höft-, knä- eller fotleder, i detta fall höftledsartros. Studierna har ingen tydlig och gemensam definition över vad långdistanslöpning är. De granskade studierna använder sig av olika mätmetoder för att bedöma leddegenerationen, både av självrapportering och av olika diagnostiska kriterier för artros. Alla studier har inslag av selektionsbias.   Slutsats En indikation på att det inte finns ett vetenskapligt stöd för att långdistanslöpning ger höft-, knä- eller fotledsartros hos människor. Studierna har brister i hantering av confounders och selektionsbias och bedöms vara av låg eller medelhög kvalitet. / Abstract   Aim The purpose of this study was to compile the quality and results of studies that examined if long-distance running gives osteoarthritis of the hip, knee or ankle joints. Is there scientific evidence that long-distance running gives osteoarthritis of the hip, knee or ankle? What strengths and weaknesses of the studies attempted to determine if the link between long-distance running and osteoarthritis of the hip, knee or ankle joints.   Method Search of the literature was performed in PubMed, CINAHL, Cochrane Library, and PEDro. This resulted in ten articles that were included for further review and compilation. Based on the articles combined probative value was scored and graded articles for level of evidence according to the National Council on Technology Evaluation (SBU) examination templates for cohort studies with control groups.   Results Only one of the ten studies showed a positive association between long distance running and osteoarthritis of the hip, knee or ankle joints, in this case hip joint. The studies have not a clear and common definition of what long-distance running is. The studies reviewed use different metrics to assess joint degeneration, both by self-report and of different diagnostic criteria for osteoarthritis. All studies have an element of selection bias.   Conclusion An indication that there is no scientific evidence that long-distance running gives hip, knee or ankle osteoarthritis in humans. The studies were inadequate handling of confounders and selection bias and judged to be of low or medium quality.

Abstract The normal tibiotalar joint is a stable structure, where only a minor widening of the ankle mortise and rotation of the fibula is caused by normal flexion-extension movements and joint loading. The most common injury mechanism is excessive external rotation of the ankle, which may induce an ankle fracture or an injury of the syndesmosis ligaments, leading to instability of the joint. Subsequent surgical fixation can cause malreduction and dysfunction of the joint by restricting normal motion, which may lead to altered tibiotalar joint loading conditions and cause long-term complications, such as osteoarthritis. In order to correctly evaluate the potential post-traumatic conditions, clinicians must know the normal movements of the fibula in the distal tibiofibular joint and the talus in the upper ankle joint under weight-bearing conditions. Until now, the normal dynamics of the syndesmosis and upper ankle joint, as well as the changes in rotations have been unknown, and the aim was to answer these questions. In the first study, the distal tibiofibular syndesmosis was assessed on non-weight-bearing computed tomography (NWBCT) scans in order to provide standardized measures of the syndesmosis in cross-sectional imaging. Second, a distal tibiofibular syndesmosis was investigated in upright weight-bearing CT (WBCT) scans in the neutral standing position and under maximal internal and external rotational stress. Third, the normal anatomy and rotational dynamics of the upper ankle joint was observed. The first study demonstrated that in axial CT imaging of the syndesmosis, the location of the fibula was either anteriorly or centrally in the tibial incisura in 88–97% of patients in both the supine position with resting ankles, and in the neutral standing position. If the fibula lies posteriorly, malreduction should be considered. The second study demonstrated that when the ankle is maximally rotated, the fibula slides back and forth in the tibial incisura with 1.5 mm total movement and a rotation of 3°, but the distal tibiofibular joint is not widened. In internal rotation of the ankle, the talus is rotated externally, the fibula moves, and the fibula moves to the posterior part of the tibial incisura in 40% of subjects. In external rotation of the ankle, the talus is rotated internally, and the fibula moves concomitantly slightly anteriorly. The results of the third study show that the talus rotates in the ankle mortise 10°, with no change in the medial clear space (MCS) and no significant lateral widening in the joint space. Minimal intrasubject variation (less than 1 mm at all measurement points) was observed in the total rotational range of motion, while in some measurements the intersubject variation was large in both supine, neutral standing, and rotational stress images. Sex or age did not affect most of the measurements; only in maximal external rotation was a minor tilting of the talus seen in the older population. These findings suggest that the contralateral ankle can and probably should be used as a reference when possible malreduction of the syndesmosis or tibiotalar ankle joint instability is suspected. / Tiivistelmä Nilkkanivel on sääriluun, pohjeluun ja telaluun muodostama kokonaisuus, jota tiiviit nivelsiderakenteet vakauttavat. Normaalisti nivelen pääasiallinen liike tapahtuu ojennus-koukistussuuntaan ja kuormittumiseen liittyen tapahtuu vain hyvin vähäistä nivelhaarukan leviämistä, eikä telaluu pääse juurikaan kiertymään. Useimmat nilkkavammat taas syntyvät kiertoliikkeessä, joka voi johtaa nivelsidevammaan ja/tai nilkkamurtumaan, johon liittyen telaluu pääsee kiertymään normaalia enemmän ulkokiertoon ja nivelhaarukka leviämään, mikä johtaa nilkan epävakauteen ja poikkeaviin kuormitusolosuhteisiin. Vamman jälkeinen kirurginen hoito taas voi aiheuttaa luisten rakenteiden asettumiseen nivelen toiminnan kannalta epäanatomiseen asentoon ja estää nilkan normaalin liikkumisen. Sekä nivelen liiallinen väljyys että virheasentoon tehty kirurginen kiinnitys voivat aiheuttaa kipua, muuttaa nivelen kuormitusolosuhteita ja johtaa nivelen toimintahäiriöihin tai ennenaikaiseen kulumiseen. Jotta vamman jälkeisiä muutoksia pystyttäisiin arvioimaan sekä sääri- ja pohjeluun välisen sidekudossidoksen eli syndesmoosin alueella että ylemmässä nilkkanivelessä tulisi terveiden nivelten normaalit liikelaajuudet ja kuormituksen aiheuttamat dynaamiset muutokset pystyä mittaamaan luotettavasti. Tämän tutkimuksen tarkoituksena oli selvittää syndesmoosialueen ja ylemmän nilkkanivelen normaali anatomia sekä maaten kuvatuista tietokonetomografia- että seisten kuvatuista kartiokeilatietokonetomografia¬tutkimuksista arvioiden. Lisäksi mitattiin molempien nivelalueiden kiertorasituksessa todettavat normaalit liikelaajuudet seisten kuvatuista kartiokeilatietokonetomografiatutkimuksista. Ensimmäinen tutkimus osoitti, että normaalisti pohjeluu sijaitsee alemman pohjesääriluunivelen etuosassa tai nivelen keskellä 88–97 %:lla tutkituista potilaista. Jos taas pohjeluu on siirtynyt nivelen takaosaan, tulee epäillä virheasentoa. Toisen tutkimuksen tulokset osoittivat, että kiertorasituksissa pohjeluu liikkuu syndesmoosialueella edestakaisin 1.5 mm ja kiertyy 3 astetta, mutta nivel ei levene sivuttaissuuntaan. Telaluun sisäkierrossa pohjeluu liukuu 40 %:lla tutkituista vapaaehtoisista koehenkilöistä syndesmoosialueen takaosaan, ja ulkokierrossa taas nivelen etuosaan. Kolmas tutkimus osoitti, että telaluu kiertyy maksimaalisen ulko- ja sisäkierron välillä 10 astetta ilman merkittävää mediaalisen tai lateraalisen nivelraon leviämistä. Kaikissa tutkimuksissa todettiin, että mikäli koehenkilöitä verrataan keskenään, samojen mittauskohtien väliset erot ovat merkittäviä. Mikäli taas verrataan saman koehenkilön molempia nilkkoja keskenään, mittauksissa ei ole merkittävää puolieroa. Ainoa mittaustulos, johon iällä tai sukupuolella oli vaikutusta, oli vanhemmassa ikäryhmässä todettu telaluun vähäinen kallistuminen maksimaalisessa ulkokierrossa. Tutkimukset tuottivat tietoa alemman pohjesääriluunivelen ja ylemmän nilkkanivelen normaalista anatomiasta ja liikkuvuuksista kiertorasituksissa tietokonetomografiatutkimuksissa. Tutkimusten perusteella todetaan, että potilaan tervettä nilkkaa kannattaa käyttää normaalianatomian vertailukohtana sekä heti vamman jälkeen mahdollisen operatiivisen hoidon tarvetta arvioitaessa että hoidon tulosta arvioitaessa.

L’Instabilité Chronique de la Cheville (ICC) est une possible complication fonctionnelle consécutive à une entorse collatérale latérale et est définie par une sensation de « giving way » décrite subjectivement, qui correspond au dérobement de la cheville pendant sa mise en charge. Afin de mieux caractériser l’ICC, il est important de pouvoir proposer des mesures objectives. Ce travail a pour objectif d’évaluer de manière globale, au cours de diverses tâches, les différents mécanismes impliqués dans l’ICC, et ce, en comparant la motricité de sujets asymptomatiques et de personnes souffrant de cette pathologie.Les résultats de ce travail mettent en évidence plusieurs mécanismes caractéristiques qui témoignent d’une augmentation du risque d’entorses et d’instabilités latérales. Ces mécanismes affectent le contrôle postural des personnes se plaignant d’une ICC et résultent d’une altération du système proprioceptif, utile dans la régulation des mouvements et des positions des différents segments, ainsi que du système musculaire, générateur de force et stabilisateur de la cheville. Des adaptations centrales illustrant une stratégie visant à protéger la cheville des contraintes éventuellement traumatiques sont également suggérées par les résultats.Les tests mis en place dans ce travail peuvent fournir aux thérapeutes des informations objectives sur l’ICC. L’efficacité de ces tests pour caractériser cette pathologie a été démontrée, mais ceux-ci pourraient également être utilisés comme diagnostic initial et final lors d’une prise en charge rééducative. Ces nouvelles informations pourront effectivement compléter celles concernant l’historique du patient et permettraient ainsi d’apporter une dimension objective à la caractérisation d’une pathologie initialement décrite subjectivement. / Chronic Ankle Instability (CAI) is a possible functional complication consecutive to a lateral ankle sprain and is defined by a feeling of ankle “giving way”, subjectively described, which corresponds to a flinch of this joint during its loading. In order to improve CAI characterization, it is important to submit objectives measures.The objective of this work is to globally assess the different mechanisms involved in CAI, during several functional tasks. A comparison between asymptomatic subjects and subjects with CAI is made about functional abilities.Results highlight several characteristic mechanisms that attest of an increase of ankle sprain and lateral instabilities risks. These mechanisms affect postural control of people complaining CAI, and result in an alteration of proprioceptive system, useful in movement and positioning regulation of body segments, and an alteration of muscular system, which generates force and stabilizes the ankle joint. Central adaptations illustrating a protective strategy against prospective traumatic movements are also suggested by the results.Tests used in this work can provide objective information about CAI to the therapists. Efficiency of these tests to characterize CAI is demonstrated, but they could also be used as an initial or final diagnostic during a rehabilitation program. Indeed, these new information can complete the patient historic and could adduce an objective regard to the characterization of a pathology initially described subjectively by the patient.

Background: The anatomy of the syndesmosis is variable, yet little is known on the correlation between differences in anatomy and syndesmosis reduction results. The aim of this study was to analyze the correlation between syndesmotic anatomy and the modes of syndesmotic malreduction. Methods: Bilateral postreduction ankle computed tomography (CT) scans of 72 patients treated for fractures with syndesmotic disruption were analyzed. Incisura depth, fibular engagement into the incisura, and incisura rotation were correlated with degree of syndesmotic malreduction in coronal and sagittal planes as well as rotational malreduction. Results: Clinically relevant malreduction in the coronal plane, sagittal plane, and rotation affected 8.3%, 27.8%, and 19.4% of syndesmoses, respectively. The syndesmoses with a deep incisura and the fibula not engaged into the tibial incisura were at risk of overcompression, anteverted incisuras at risk of anterior fibular translation, and retroverted incisuras at risk of posterior fibular translation. Conclusions: Certain morphologic configurations of the tibial incisura increased the risk of specific syndesmotic malreduction patterns. Level of Evidence: Level III, comparative study.