|Year : 2014 | Volume
| Issue : 3 | Page : 13-16
A study of calcaneal enthesophytes (spurs) in Indian population
Jagdev Singh Kullar1, Gurpreet Kaur Randhawa2, Keerat Kaur Kullar3
1 Department of Anatomy, Government Medical College, Amritsar, Punjab, India
2 Department of Pharmacology, Government Medical College, Amritsar, Punjab, India
3 MBBS Student, SGRD Medical College, Amritsar, Punjab, India
|Date of Submission||09-Sep-2013|
|Date of Acceptance||28-Mar-2014|
|Date of Web Publication||15-Sep-2014|
Jagdev Singh Kullar
338-D Block, Ranjit Avenue, Amritsar, Punjab
Source of Support: None, Conflict of Interest: None
| Abstract|| |
Introduction: Calcaneus or os calcis forms a major component of the skeleton of foot providing posterior pillars for bony arches of the foot. It is largest of seven tarsal bones of foot and forms prominence of heel. Many times anterior to calcaneal tuberosity an osteophytic outgrowth has been observed (calcaneal or heel spur) extending along entire width, for about 2-2.5 cm. The apex of spur seen embedded in plantar fascia, directly anterior to its origin. Hence, the study of calcaneal spurs has been undertaken. Materials and Methods: The material for the study consisted of 200 dry (100 right and 100 left), adult calcanei of unknown age and sex obtained from Department of Anatomy. The calcaneal enthesophytes/spurs were studied in detail and classified according to types of calcaneum. Results: Maximum incidence of calcaneal spurs were found in Type I calcanei (11%) and no calcaneal spurs were found in Type III calcanei. Total incidence of dorsal calcaneal spurs in all types of calcanei was maximal (15.5%). The incidence of plantar spurs was 6.5% being highest in Type I calcanei (4%). The incidence and type of calcaneal spurs were compared with those of previous studies and etiology of heel pain has been discussed. Correlation between type of calcanei and spurs has been studied for the 1 st time. Conclusion: Calcaneal spurs are related to type of calcanei with the highest frequency in Type I and least in Type III (no spurs seen in Type III and least in Type IV). Other factors, which contribute toward increase in incidence of spurs, are increasing age and weight, concurrent orthopedic diseases, and heel pain.
Keywords: Dorsal spur, plantar spur, talar articular facets
|How to cite this article:|
Kullar JS, Randhawa GK, Kullar KK. A study of calcaneal enthesophytes (spurs) in Indian population. Int J App Basic Med Res 2014;4, Suppl S1:13-6
|How to cite this URL:|
Kullar JS, Randhawa GK, Kullar KK. A study of calcaneal enthesophytes (spurs) in Indian population. Int J App Basic Med Res [serial online] 2014 [cited 2020 May 28];4, Suppl S1:13-6. Available from: http://www.ijabmr.org/text.asp?2014/4/3/13/140709
| Introduction|| |
Calcaneus or heel bone or os calcis forms a major component of the skeleton of foot providing posterior pillars for bony arches of the foot. The calcaneum is the strongest, largest, and longest of the seven tarsal bones and forms the prominence of the heel.  It supports the body's weight and acts as a calf muscle lever. It is the first bone of the foot to ossify. The plantar or inferior surface is rough, as the calcaneal tuberosity, the lateral and medial processes extend distally, separated by a notch. Anterior to calcaneal tuberosity is an osteophytic outgrowth (calcaneal or heel spur or enthesophytes) extending along entire width, for about 2-2.5 cm. The apex of the spur is embedded in the plantar fascia, directly anterior to its origin. Enthesophyte formation occurs at the site of ligament and tendon insertions into bone. It tends to grow in the direction of natural pull of ligaments and tendons involved. 
Osseous spurring of the plantar aspect of the calcaneus was first documented in 1900 by the German physician Plettner, who coined the term Kalkaneussporn (calcaneal spur).  Calcaneal spurs are of two types: Dorsal/posterior spurs and plantar/inferior spurs. Clinically, it may remain asymptomatic or produce disabling pain in the heel.  They probably represent variations in the normal development of the calcaneus. 
This study was undertaken to assess the incidence of calcaneal spurs and the type of calcaneum commonly associated with them in the Indian cadavers. Correlation between type of calcanei and spurs has been studied for the 1 st time. Probable etiology of calcaneal spurs and morbidity associated with it will also be discussed.
| Materials and Methods|| |
A total of 200 dry (100 right and 100 left), adult calcanei of unknown sexes obtained from the Department of Anatomy, comprised the material for the study. Any calcaneum looking pathological on general examination was discarded from the study. Calcanei were labeled from 1 to 200 with suffix R (right) or L (left). Morphological study of posterior (dorsal spurs) and inferior (plantar spurs) surfaces of the calcanei was done. The calcanei were classified on the basis of talar articular facets (present on the middle-third of superior or proximal surfaces). The incidence of calcaneal spurs were studied in detail.
| Results|| |
The body of the talus articulates in a regular manner with the posterior facet of the calcaneus, while the head articulates with facet (s) on the anterior third of the calcaneus. Various calcaneal facets were classified into four types [Table 1] based on talar articular facets (constricted and not constricted), with incidence as follows:
|Table 1: Classification of calcanei on the basis of talar articular facets|
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The incidence of Type I calcanei is maximum (72.5%) in the Indian population with least incidence of Type IV calcanei (0.5%).
Further the presence or absence of the calcaneal spur, an important feature on the posterior (dorsal) and inferior (plantar) surfaces, was studied in detail [Table 2]. Total incidence of calcaneal spurs was found in 26.5% of calcanei studied.
The incidence of only dorsal spurs was 15.5%, being the highest in Type I calcanei (11%) followed by Type II calcanei (4.5%). No dorsal spurs were found in Type III and IV calcanei. The dorsal spurs varied in the height (range: 3-11 mm) and were always directed superiorly due to pull of tendo calcaneus.
The incidence of only plantar spurs was 6.5% being highest in Type I calcanei (4%) followed by Type II (2.5%). No plantar spurs were found in Type III and IV calcanei. The planter spurs also varied in length (range: 2-8 mm), but were always directed anteriorly due to the traction of the planter fascia.
Both dorsal and plantar spurs [Figure 1] were encountered in 4.5% calcanei being 3% in Type I, 1% in Type II, and 0.5% in Type IV calcanei. None of the Type III calcanei had either dorsal or plantar spurs.
Therefore, most frequently encountered Type I calcanei is also associated with the highest frequency of calcaneal spurs whether dorsal or plantar or both.
In this study, the incidence of presence of calcaneal spurs was higher (26.5%) compared to above workers [Table 3], except Menz et al.  (55.1%) and Perumal and Anand  (56% in Tamil Nadu). The exceptionally high incidence in the study by Menz et al.  could be due to the selected elderly (62-94 years) patients. The incidence of plantar spurs was lowest (6.5%) in our study and that of dorsal spurs was highest (15.5%) as compared to Resnick et al.  and Riepert et al.  figures of 16% and 11% and 11.2% and 9.3%, respectively. Similarly, Weiss  also found an increased incidence of dorsal spurs. The incidence of both spurs was comparable with the study of Resnick et al.  Bassiouni  found the incidence of inferior spurs to be more common than posterior spurs. Menz et al.  observed that plantar calcaneal spurs were more likely to have Achilles tendon spurs (odds ratio = 2.0, 95% confidence interval: 1.2-3.5).
|Table 3: Comparison of incidence and type of calcaneal spurs in different studies|
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Probable etiology of calcaneal spurs
Riepert et al.  found that plantar spurs were more common (11.2%), though later to appear as compared with dorsal spurs (9.3%). Bassiouni  found that the frequency of calcaneal spurs rose with age (maximum in 41-60 year of age group) in patients of osteoarthritis and rheumatoid arthritis than controls. Banadda et al.  have reported 50% prevalence of calcaneal spurs in Zimbabwean hospital patients aged over 51 years. Weiss  also reported an increased frequency of spurs with age.
Riepert et al.  found that plantar spurs were more in females, while dorsal spurs were commoner in males. They also found that dorsal spurs were more common in males up to the age of 70 years. Riepert et al.  have reported prevalence of plantar heel spur as 16.3% and 6.5% (increasing with age) for males and females, respectively, being significantly more frequent in females. Bassiouni  found no significant intersexual difference in the incidence of calcaneal spurs. Menz et al.  found equal prevalence of spurs in either sex of the patients.
Menz et al.  found that participants with plantar calcaneal spurs were more likely to be obese.
A high incidence of calcaneal spurs was found in Victoria, Australia  (55.1%) and in the Indian state of Tamil Nadu  (56%). Calcaneal spurs were found in 26.5% calcanei with incidence of 15.5% for dorsal spurs in the Punjab state of India (present study). Comparatively a lesser and similar incidence was seen in Thailand  (15.5%) and the Caucasian population  (15.7%).
Robinson  presented three cases of unrelated children aged 9 months, 3 years and 7 years, who had asymptomatic, symmetrical, posteriorly directed plantar calcaneal spurs. He further opined that these probably represent variations in the normal development of the calcaneus.
Type of calcanei
The incidence of calcaneal spurs has been directly linked to type of calcanei in this study. Type I calcanei has been found to be most frequently associated with spurs (dorsal - 15.5%, plantar - 6.5% and both in 4.5% calcanei), while no spurs were found in Type III calcanei.
Association with physical activity and profession
Li and Muehleman  studied the elderly cadaveric specimens, using radiographic, gross morphological, and histological investigations to find the probable factor for the development of heel spur (calcaneal exostosis). They found that the bony trabeculae of the spur were not aligned in the direction of soft-tissue traction, but rather in the direction of stress on the calcaneus during walking and standing. Thus, substantiating the hypothesis of development of heel spur, which might be a skeletal response to stress. It may serve to protect the bone against the development of microfractures. Cosentino et al.  found that persons who have to stand for long hours in their profession experience more heel pain.
Bassiouni  found that 81% patients of osteoarthritis had calcaneal spurs as compared with 21.6% of rheumatoid arthritis and 16.1% of control patients. Gerster et al.  found that the incidence of calcaneal spurs was maximum in patients of osteoarthritis (56%), followed by Reiter's syndrome (37.4%), ankylosing spondylitis (31.2%) and rheumatoid arthritis (24%). Resnick et al.  worked on calcaneal abnormalities in articular disorders and found that calcaneal spurs were present on plantar or posterior surface of calcanei in 22% of the general population (normal control), as compared with 36% of rheumatoid arthritis patients, 41% of psoriatic arthritis patients, 44% of Reiter's syndrome patients, and 33% of ankylosing spondylitis patients. Prichasuk and Subhadrabandhu  studied 400 normal subjects and 82 patients of plantar heel pain for incidence of the calcaneal spur. Incidence was found to be 15.5% and 65.9% in these two categories respectively, which was a highly significant result. Menz et al.  found that participants with plantar calcaneal spurs have a history of osteoarthritis and also current or previous heel pain. Weiss  also reported a positive correlation between calcaneal spurs and osteoarthritis.
Association with heel pain
Williams et al.  found on plain X-ray, that 39 out of 52 painful heels (75%) and 24 out of 38 opposite nonpainful heels (63%) showed plantar spurs, compared with 5 of 63 (7.9%) heels in 59 age- and sex-matched controls. Prichasuk and Subhadrabandhu  found the calcaneal spur in 15.5% of the normal population (n = 400) and 65.9% of patients with plantar heel pain (n = 82) leading them to suggest it to be one of the causes of heel pain, others being excessive weight gain, ageing and gender. In contrast, Lu et al.  could not find any clear relationship between heel pain and the length, shape and direction of the calcaneal spur. They attributed heel pain to thickened plantar soft-tissues, patients' age and sex. Chundru et al.  also reported a higher frequency of the calcaneal spur formation in individuals with abductor digiti minimi atrophy.
| Conclusion|| |
Calcaneal spurs are related to the type of calcanei with the highest frequency in Type I and least in Type III (no spurs seen in Type III and least in Type IV. Please refer to observations). Other factors, which increase the incidence of spurs are increasing age and weight, concurrent orthopedic diseases and heel pain. Gender might be a cofactor leading to spur formation and plantar heel pain. These findings support the theory that plantar calcaneal spurs may be an adaptive response to vertical compression of the heel rather than longitudinal traction at the calcaneal enthesis. Therefore, calcaneal spurs are one of the cofactors/associations for heel pain.
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[Table 1], [Table 2], [Table 3]
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