NUTRIENT FORAMEN;

Abstract

Objectives: To study the nutrient foramina of the dried human clavicle with respectto their position, number and direction for clinical interest. Study Design: Cross sectional study.Setting: Anatomy Department Faisalabad Medical University Faisalabad. Period: Six monthsfrom July to December 2017. Material and Methods: 60 dried human clavicles taken frombone bank of Anatomy Department Faisalabad Medical University Faisalabad. The foraminawere studied according to their location, and number and direction. The foramina index wascalculated using Hughes Formula by measuring the average total length and average lengthof foramina from sternal end of the clavicle. Results: The nutrient foramen was observed in all60(100%) of the clavicle. Single foramen was present in 22 (36.6%) clavicle and double foramenin 30(50%) clavicle. Triple and quadruple foramen in 6(10%) and 2(3.3%) clavicles respectively.The 34 left clavicles posses single foramen 12 (41.1%), double foramen 14(35.2%) while tripleand quadruple are 6(17.6%) and 2(5.8%) respectively. Total 26 right clavicles had 10 (38.4%)single foramen and 16(61.5%) double foramen. Total number of foramen in all 60 clavicleswere 108 of which 61.1% are located on posterior surface of the clavicle, 27% were found oninferior surface and rest 11.1% were on anterior surface. The clavicle having more than oneforamina are 28 out of which 64.2% was having both inferior and posterior foramina, 21.4 % wasanterior and posterior while 14.28% was located on triple sites anterior, inferior and posterior.We also found 90% of foramina were present on middle 1/3 and 10% on lateral 1/3. 98.3% ofthe foramina were directed to acromial end while rest 1.7 % to sternal end. The mean length offoramina from sternal end is 7.46 cm and mean maximum length of the clavicle was 14.51cm.The mean foramina index was 51.41. Conclusion: It is concluded from the study that most ofthe foramina are located on middle 3rd of the clavicle the commonest site of the fractures of thebone. Most of the foramina are located on the posterior surface denoting its blood supply fromthe neighboring blood supply. The knowledge of the foramina and its blood supply is importantfor fracture healing and bone grafting.