International Journal of Current Research and Review
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IJCRR - Vol 12 Issue 10, May, 2020

Pages: 01-04

Date of Publication: 19-May-2020


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Morphological and Morphometrical Study of the Human Acetabulum and its Clinical Implications

Author: Ina Bahl, Jyothi K C, Shailaja Shetty

Category: Healthcare

Abstract:Background: The acetabulum is a cup-shaped depression on the hipbone. All three innominate elements, the ilium, ischium and pubis contribute to its formation unequally. The acetabular fossa articulates with the head of femur to form the hip joint.
Objectives: To document the relationship between the depth and diameter of the acetabulum and to describe the anterior acetabular ridge morphology.
Material and Methods: The study was conducted on 73 adult unpaired dry hipbones of unknown age and sex were assessed for two morphometric and one morphological character. The data of the acetabular depth and diameter was determined using Vernier calipers. The morphology of anterior acetabular ridge was evaluated and classified as curved, angular, straight and irregular.
Results: The mean diameter of acetabular cavity on right side was found to be 48.3 \? 3.4mm and on the left side 48.9 \? 3.5mm. The mean depth on right side was measured to be 27.1 \? 3.4mm and on left side 27 \? 3mm. We observed positive co-relation between the mean and standard deviation of total diameter and depth of acetabular cavity. The Curved shape anterior acetabular ridge was the most predominant type (41.1%) and the least type was straight shaped (5.5%).
Conclusion: The morphometric assessment of the acetabulum has a myriad of utilities for Anatomists, anthropologists, experts in forensic medicine and orthopaedic surgeons for better alignment of acetabular cup placement during total hip arthroplasty. Further, the anterior ridge morphology may be vital in diagnosing congenital acetabular dysplasia and during treatment of hip joint fractures.

Keywords: Acetabulum, Acetabular ridge, Morphology, Morphometric, Prosthesis, Dysplasia

Full Text:

INTRODUCTION

Age, stature, gender and ethnicity form the corner stone's of an individual’s biological identity. The distinct morphology of the human hip bone not only helps attribute these parameters to establish a person’s identity but is also fundamental from the orthopedic, anthropologic and forensic point of view 1.

The acetabulum is a deep cup shaped, hemispherical depression on the outer surface of the hipbone. All three innominate elements that is the ilium, ischium and pubis contribute to its formation unequally 2. The central part of the acetabulum consists of the acetabular fossa surrounded by a curved articular lunate surface, which articulates with the head of femur to form the hip joint the major weight bearing joint of the body3.

The shape of the acetabulum can be altered prenatally due to disruption in its development or during the postnatal period due to damage to the cartilage of lunate articular surface. Acetabular dysplasia is the most common developmental disorder of the hip bone, due to underdeveloped acetabulum, wherein acetabular roof remains shallow, superficial and vertically oriented.  This results in smaller surface area for weight bearing and hence receives much larger force per unit area while walking and may lead to early degeneration which is the indication for hip arthroplasty4.

The anthropometric study of the acetabulum aids radiologists in diagnosing congenital hip dysplasia, and orthopaedicians for planning for an acetabular surgery, during hip arthroplasty and in the treatment of hip fractures.

This study would also be beneficial in understanding the pathophysiology of the hip pathologies such as femoroacetabular impingement and preparing prosthesis of desirable sizes5.

The present study becomes all the more vital as acetabular dimensions show regional variations and the study is crucial to provide valuable parameters in the Indian population which would exterminate the catastrophic consequences of prosthetic loosening or dislocation6.

The aim and objectives of the present study would be

To document the acetabular depth and diameter

To demonstrate the relationship between the two parameters

To describe the morphology of the anterior acetabular ridge

MATERIAL   AND METHODS

The study was conducted on 73 dry adult hip bones of unknown gender and age collected from Department of Anatomy bone bank, Ramaiah Medical College, Bangalore. Bones with gross damage or anomalies were excluded from the study. Vernier calliper was employed for the accurate measurements.

 Morphometric and Morphological features documented (Figure 1-4)

  • The transverse diameter of the acetabulum- The maximum distance between the anterior and posterior ends of the acetabular cavity.

  • The vertical diameter of the acetabulum -The greatest dimension between the Upper and Lower Margins of the Acetabular Cavity.

  • The total acetabular diameter - the average of the transverse and vertical diameter.

  • The depth of the acetabulum - the maximum vertical distance from the deepest point in the acetabular cavity to the horizontal plane touching the margins of the acetabular cavity. A plastic ruler was kept across the margins of the acetabular cavity and the depth of the acetabulum was measured on the Vernier calliper from the deepest point in the acetabulum to the ruler.

  • The shape of the anterior acetabular ridge was classified as curved, angular, straight and irregular. (Fig 5)

  • The relationship between the acetabular depth and diameter was also evaluated.

RESULTS

A comparison of 73 dry unpaired hip bones comprising 34 bones of left side and 39 bones of right side yielded the following results. Regarding the anterior acetabular ridge morphology, the commonest type was curved shape 31(41.10%), the least common was straight shape 4 (5.48%). (Table 1).

 The mean values for acetabular diameter on right side was found to be 48.3 ± 3.4mm and on the left side 48.9 ± 3.5mm. The mean values for acetabular depth on right side was measured to be 27.1 ± 3.4mm and on left side 27 ± 3mm. (Table 2, 3). The mean and standard deviation of total diameter and depth of acetabular cavity are shown and a significant positive co-relation was found between them.

DISCUSSION

The acetabular morphology is very important for successful hip arthroplasty and for selecting a suitable prosthesis. The curved shaped acetabular ridges were found more frequently in our study. The comparison with other authors also showed same result. The percentage of irregular shape bones is significantly higher in the present study as compared to the study by Maruyama et al7.The percentage of bones with straight shape of anterior acetabular ridge is significantly lower as compared to the studies by Vyasa et al8, Prathiba et al9 and AKSU et al 10( Table 4).  

The findings of measurements of Total Acetabular diameter and Depth of acetabular cavity in the present study are consistent with other studies. (Table 5)

The knowledge of acetabular dimensions will help us in understanding the acetabular pathology and also in identifying disputed person through forensic expertise13.

The differences observed between the values of present study and that of other studies could be attributed to ethnic and racial variations.

However, it should be kept in mind, that the present study employed smaller number of hip bones, so it is worthwhile to perform similar studies on more number of hip bones for its theoretical and practical value in the coming years.

CONCLUSION

The findings of our study are vital for the accurate design of side specific prosthetic cups that replicate the curvaceous acetabular profile which would prevent prosthetic overlap, mechanical loosening and reduce the incidence of ilio-psoas impingement. The precise   knowledge about the variations in morphology and morphometry of acetabular cavity would help clinicians, orthopedic surgeons, prosthetic surgeons and radiologists for better understanding about the pathologies of hip region which aids  in accurate diagnosis and in planning a  suitable treatment.

ACKNOWLEDGEMENTS

Authors acknowledge the immense help received from Mrs  Radhika  our statistician for the statistical analysis. Authors acknowledge the immense help received from the scholars whose articles are cited and included in references of this manuscript. The authors are also grateful to authors/ editors/ publishers of all those articles, journals and books from where the literature for this article has been reviewed and discussed.

SOURCE OF FUNDING: N/A

CONFLICT OF INTEREST: Nil

References:

1. Dhindsa G S, singh P singh Z. Morphometry of the adult human dry hip bone International Journal of Pharmacy and Pharmaceutical Sciences  2013 ;5(2): 505-507.

2. Sinnatamby CS. 2006. Last’s Anatomy, Regional and Applied, 11th Edition, Edinburgh, Churchill Livingstone, 132.

3. Moore KL, Dalley AF, Agur AM. 2010. Pelvis and Perineum: Clinically Oriented Anatomy, 6th Edition, Philadelphia, Lippincott Williams and Wilkins, 328.

4.umer M, Thambyah A, Tan WTJ, das De S. Acetabular  morphometry for determining hip dysplasia in the Singaporean  population . J Orthop Surg 2006; 14: 21-31.

5. Ukoha U U , Umeasalugo K E, Okafor J I, Ndukwe G U, Nzeakor H C, Ekwunife. Morphology and Morphometry of dry adult acetabula in Nigeria. Rev Arg de Anat Clin 2014 jul, 6 (3): 150-155.

6. Tannast M, Siebenrock KA, Anderson SE. 2007. Femoroacetabular Impingement: Radiographic Diagnosis - What the radiologist should know, AJR 188: 1540-52.

7. Maruyama M, Feinberg JR, Capello WN, D’antonio JA.. Morphologic features of the acetabulum and femur: anteversion angle and implant positioning. Clin Orthop 2001;1: 52-65.

8. Vyas K, Shroff B, Zanzrukiya K. 2013. An Osseous study of morphological aspect of acetabulum of Hip bone. Int J Res Med 2013; 2(1): 78-82.

9. Pratibha K, Hema L, Devishankar. Acetabulum of the hip bone: A morhometric study in south coastal region. International Journal of Recent Trends in Science and Technology 2015; 17(2): 136-139.

10. Aksu FT, Ceri NG, Arman C, Tetik S. Morphology and morphometry of the acetabulum. DEÜ Tip Fakültesi Dergisi 2006; 20(3): 143-148.

11. Govsa F, Ozer MA, Ozgur Z. Morphologic features of the acetabulum. Arch Orthop Trauma Surg 2005;125:453-461.

12. Chauhan R, Paul S, Dhaon BK.. Anatomical Parameters of North Indian Hip joints – Cadaveric Study. Journal of Anatomical Society of India 2002; 51: 39-42.

13. Parmar G, Rupareliab S, Patel SV, Jethvaa N, “Morphology and morphometry of Acetabulum.” Int J Biol Med Res 2013;4(1):2924-2926.

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Best Article Award

A Study by Juna Byun et al. entitled "Study on Difference in Coronavirus-19 Related Anxiety between Face-to-face and Non-face-to-face Classes among University Students in South Korea" is awarded Best Article for Vol 12 issue 16
A Study by Sudha Ramachandra & Vinay Chavan entitled "Enhanced-Hybrid-Age Layered Population Structure (E-Hybrid-ALPS): A Genetic Algorithm with Adaptive Crossover for Molecular Docking Studies of Drug Discovery Process" is awarded Best article for Vol 12 issue 15
A Study by Varsha M. Shindhe et al. entitled "A Study on Effect of Smokeless Tobacco on Pulmonary Function Tests in Class IV Workers of USM-KLE (Universiti Sains Malaysia-Karnataka Lingayat Education Society) International Medical Programme, Belagavi" is awarded Best article of Vol 12 issue 14, July 2020
A study by Amruta Choudhary et al. entitled "Family Planning Knowledge, Attitude and Practice Among Women of Reproductive Age from Rural Area of Central India" is awarded Best Article for special issue "Modern Therapeutics Applications"
A study by Raunak Das entitled "Study of Cardiovascular Dysfunctions in Interstitial Lung Diseas epatients by Correlating the Levels of Serum NT PRO BNP and Microalbuminuria (Biomarkers of Cardiovascular Dysfunction) with Echocardiographic, Bronchoscopic and HighResolution Computed Tomography Findings of These ILD Patients" is awarded Best Article of Vol 12 issue 13 
A Study by Kannamani Ramasamy et al. entitled "COVID-19 Situation at Chennai City – Forecasting for the Better Pandemic Management" is awarded best article for  Vol 12 issue 12
A Study by Muhammet Lutfi SELCUK and Fatma COLAKOGLU entitled "Distinction of Gray and White Matter for Some Histological Staining Methods in New Zealand Rabbit's Brain" is awarded best article for  Vol 12 issue 11
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A study by Karanpreet et al "Pregnancy Induced Hypertension: A Study on Its Multisystem Involvement" is given Best Paper Award for Vol 10 issue 09
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A Study by Madhan Jeyaraman et al. entitled "Vitamin-D: An Immune Shield Against nCOVID-19" published in Vol 12 issue 09


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