Tibia bone.pptx

easy anatomy, easy explanation, well designed slides.

1. Tibia bone Dr.Priyanka Poonia Assistant Professor NAMC, Agra

2. Medial & larger bone of leg. It is a long bone Also known as shin bone Homologous with radius bone of forearm . Upper end is much larger than lower end. The medial side of lower end have a downward projection, medial malleolus. The anterior border of shaft is sharpest border of the bone. Tibia is held vertically. Introduction Side determination Anatomical position Tibia

3. 1.Upper end 1.Medial condyle 2.Lateral condyle 3.Intercondylar area 4.Tibial tuberosity 5.Fibular facet 2.Shaft Borders Surfaces 1.Anterior 1.Medial 2.Medial 2.Lateral 3.Lateral 3. Posterior 3.Lower end 5 surfaces Medial Lateral Anterior Posterior Inferior Parts of tibia Upper end Shaft Low er end

4. larger than lateral condyle. Articulate with medial condyle of femur to form knee joint. 4 surfaces, anterior, medial, posterior & superior. Superior articular, oval shape, has central & peripheral parts. Central direct contact with femoral condyle. Peripheral is separated by medial meniscus. Anterior & Medial - vascular foramina Posterior- groove 1.Medial condyle 2. Lateral condyle Fibular facet oval, lies posteroinferior aspect. Forms sup. TBJ with head of fibula. Articulate with lateral condyle of femur to form knee joint. 4 surfaces, anterior, medial, posterior & superior. Posterior- groove. Anterior - Gerdy’s tubercle. Superior articular, circular shape has central & peripheral parts. Central direct contact with femoral condyle. Peripheral is separated by lateral meniscus

5. Elevated part intercondylar eminence. Formed by M&L intercondylar tubercle B/W superior surface of 2 condyle. Narrowest in its middle. Prominence located on anterior aspect of upper end. Upper smooth & lower rough part. Epiphyseal line of upper end passes b/w two. Forms anterior limits of intercondylar area. Continuous with anterior border of shaft. 3. Inter condylar area 4. Tibial tuberosity

6. Medial border Round Extends b/w medial condyle to posterior border of medial malleolus. Anterior border Sharp & ‘S’ shape Subcutaneous, forms shin Extends b/w tibial tuberosity to anterior border of medial malleolus. Lateral border Interosseous Extends b/w lateral condyle to anterior border of fibular notch Borders

7. Medial surface b/w medial to anterior border. Broad & subcutaneous. Posterior surface b/w medial to lateral border. Upper part has rough oblique ridge, soleal line . Above soleal line triangular upper area, below elongated lower area. Lower area divides into medial & lateral part, by a vertical ridge. Nutrient foramen lies in this surface. Lateral surface b/w lateral to anterior border. In lower 1/3 it is directed forward. Surfaces

8. Posterior surface Smaller than anterior. Anterior surface Larger, upper smooth & lower rough grooved part Inferior surface Articular, articulates with superior trochlear surface of talus to form ankle joint. Lower end Lateral surface Triangular fibular notch, articulates with lower end of fibula to form inferior TFJ. Medial surface Subcutaneous, prolonged downward as medial malleolus.

9. Medial condyle Capsular ligament of knee joint Medial patellar ligament- ant. surface Semimembranosus – groove on post surface Intercondylar area Anterior horn of medial meniscus Anterior horn of lateral meniscus Anterior cruciate ligament Posterior horn of medial meniscus Posterior horn of lateral meniscus Posterior cruciate ligament Lateral condyle Capsular ligament of Sup TFJ. Iliotibial tract-ant. surface Tendon of popliteus- groove on post surface Upper end Tibial tuberosity Ligamentum patellae- upper smooth part Infrapatellar bursa- lower rough part. Attachments

10. Anterior border Deep fascia of leg Superior extensor retinaculum Posterior surface Soleus- soleal line Popliteus – above the soleal line Flexor digitorum longus- below the soleal line (medially) Tibialis posterior-below the soleal line (laterally) Medial surface Sartorious Gracilis Semitendinosus Shaft Lateral surface- Tibialis anterior- upper 2/3 Medial border Tibial collateral ligament F.D.L. Sartorious Gracilis Semitendinosus Tibialis ant. Tibialis post. Popliteus Soleous

11. Medial malleolus Deltiod ligament of ankle joint Inferior surface Capsule of ankle joint Fibular notch Interosseous tibiofibular ligament Lower end

12. Relations of lower end of Tibia Medial to Lateral Anterior aspect Posterior aspect 6 structures 5 structures (2+1+1+2) (MAN MUSCLES) (2+1+1+1) Tibialis anterior 1.Tibialis posterior Extensor hallucis longus 2. Flexor Digitorum longus Ant. Tibial artery 3.Post. Tibial artery Deep peroneal nerve 4.Tibial nerve Ext. digitorum longus 5.Flexor Hallucis longus Peroneus longus muscles muscles

13. Commonest site of fracture is junction b/w upper 2/3 & lower 1/3. Commonest site of osteomyelitis is upper end (knee remain safe). It has 1 primary (appears at 7 th week of IUL)in shaft & 2 secondary (at 16-18 th year) in both ends Ossification Centre. Applied aspect Nutrient artery of tibia is largest & branch of posterior tibial artery may tears in fracture of shaft caused necrosis. Commonest site of dislocation is ankle joint in which talus produce prominence of heel.

14. Applied aspect Dislocation Fracture Osteomyelitis