The plantar calcaneal spur: a review of anatomy, histology, etiology and key associations

Comparison of tibial nerve pulsed radiofrequency and intralesional radiofrequency thermocoagulation in the treatment of painful calcaneal spur and plantar fasciitis: a randomized clinical trial

OBJECTIVE

Ultrasound-guided tibial nerve pulsed radiofrequency (US-guided TN PRF) and fluoroscopy-guided intralesional radiofrequency thermocoagulation (FL-guided intralesional RFT) adjacent to the painful calcaneal spur are two interventions for pain management in painful calcaneal spur and plantar fasciitis. This study aimed to compare the effectiveness of the two procedures.

DESIGN

A prospective, randomized, single-blind study.

SETTING

Single-center pain clinic.

SUBJECTS

Forty-nine patients who met the inclusion criteria were randomized into two groups.

METHODS

Group U (25 patients) received US-guided TN PRF at 42°C for 240 s, whereas Group F (24 patients) received FL-guided intralesional RFT at 80°C for 90 s. The most severe numeric rating scale (NRS) score during the first morning steps and the American Orthopedic Foot and Ankle Society (AOFAS) ankle-hindfoot scores were used to evaluate the effectiveness of the procedures. The study's primary outcome assessed treatment effectiveness via the NRS, whereas the secondary outcomes included changes in the AOFAS score and the incidence of procedure-related mild adverse events.

RESULTS

NRS and AOFAS scores significantly improved in Groups U and F at 1 and 3 months compared with baseline (P < .05), and there was no significant difference between the groups. At month 1, 50% or greater pain relief was achieved in 72% of patients in Group U and 75% of patients in Group F. No significant difference was observed in the incidence of mild adverse events between the groups.

CONCLUSIONS

US-guided TN PRF and FL-guided intralesional RFT have shown significant effectiveness in the treatment of painful calcaneal spur and plantar fasciitis. Larger randomized controlled trials are needed.

CLINICAL TRIAL NUMBER

NCT06240507.

Ossification of the posterior longitudinal ligament is linked to heterotopic ossification of the ankle/foot tendons

INTRODUCTION

Systemic osteogenesis has been speculated to be involved in the pathogenesis of ossification of the posterior longitudinal ligament (OPLL). Our purpose was to compare the radiologic prevalence and severity of heterotopic ossification in foot tendons of Japanese patients with OPLL and to determine their association with systemic heterotopic ossification.

MATERIALS AND METHODS

Clinical and radiographic data of 114 patients with OPLL were collected from 2020 to 2022. Control data were extracted from a medical database of 362 patients with ankle radiographs. Achilles and plantar tendon ossification were classified as grades 0-4, and the presence of osteophytes at five sites in the foot/ankle joint was assessed by radiography. Factors associated with the presence and severity of each ossification were evaluated by multivariable logistic regression and linear regression analysis.

RESULTS

The prevalence of Achilles and plantar tendon ossification (grade ≥ 2) was 4.0-5.5 times higher in patients with OPLL (40-56%) than in the controls (10-11%). The presence of Achilles tendon ossification was associated with OPLL, age, and coexisting plantar tendon ossification, and was most strongly associated with OPLL (standardized regression coefficient, 0.79; 95% confidence interval, 1.34-2.38). The severity of Achilles and plantar tendon ossification was associated with the severity of ossification of the entire spinal ligament.

CONCLUSIONS

The strong association of foot tendon ossification with OPLL suggests that patients with OPLL have a systemic osteogenesis background. These findings will provide a basis for exploring new treatment strategies for OPLL, including control of metabolic abnormalities.

Are enlarged peroneal tubercle and accessory anterolateral talar facet associated with calcaneal spur?

BACKGROUND

As the anatomical variations of the foot, enlarged peroneal tubercle (EPT) and accessory anterolateral talar facet (AALTF) have attracted the attention of foot surgeons in recent years. However, EPT and AALTF have not been examined for a relationship with calcaneus spur (CS) as a common osteophyte.

METHODS

The subjects were 369 individuals who died in northeastern Thailand and were preserved as skeletal specimens. The authors examined for the presence of left and right EPT, AALTF, and calcaneus spur (CS). We divided the EPT (+) group with EPT and the EPT (-) group without it and also divided the AALTF (+) group with AALTF and the AALTF (-) group without it. The age at death and the presence of CS were compared statistically between the EPT (+) and EPT (-) groups and between the AATLF (+) and AALTF (-) groups.

RESULTS

Out of the total 369 cases, EPT was found in 117 cases (31.7%), AALTF was positive in 91 cases (24.7%), and CS was found in 194 cases (52.3%). In comparison between EPT (+) and EPT (-) groups, CS was significantly higher (p < 0.0001) in the EPT (+) group, but there was no significant difference in age at death. In comparison between AALTF (+) and AALTF (-) groups, there was no significant difference in age at death or CS.

CONCLUSION

This study showed a strong relationship between EPT and CS, and the prevalence of EPT and AALTF by age in Thailand was first reported. We believe it helps to know the pathogenesis and biomechanism of EPT and AALTF.

TRIAL REGISTRATION

Not applicable.

Plantar Fasciitis with Chronic Baxter's Neuropathy Causing Hindfoot Pain - A Case Report

Introduction

The main differentials of non-traumatic heel pain are plantar fasciitis (PF), plantar heel fat pad atrophy, worn-out footwear, especially asymmetric wear and tear, hyperuricemia, corns, callosities, tumors of the calcaneum, osteomyelitis, calcaneal stress fractures due to overweight or unaccustomed over usage, radiating pain from S1 nerve root compression, and seronegative spondyloarthropathies. Compression of the tibial nerve or the medial calcaneal nerve at or around the flexor retinaculum is the other possibility. In this case report, we want to highlight a sparsely known pathology, caused due to the entrapment of the first branch of the lateral plantar nerve or inferior calcaneal nerve, also known as Baxter's nerve that may present independently or accompany the common PF. Non-steroidal anti-inflammatory medications or injections of local steroids are typically used for conservative management. However, hydro-dissection or surgical release may be needed in non-responsive cases.

Case Report

We present the case of a 57-year-old female with complaints of chronic pain and tenderness in the middle of the heel radiating laterally. She underwent magnetic resonance imaging that revealed chronic denervation changes in the form of marked atrophy and near complete fatty replacement of abductor digiti minimi muscle suggesting chronic Baxter neuropathy. A mildly thickened and hyperintense plantar fascia adjacent to the calcaneal spur and significant heel fat pad edema were seen too. The patient responded well to a local steroid injection and remains pain-free at the 1-year follow-up.

Conclusion

When heel pain is present, Baxter's nerve impingement presents as a challenging clinical diagnosis that may accompany the common PF and is often overlooked. MRI can be used to assess the denervation effects of both the acute and chronic stages of Baxter's nerve impingement by identifying abnormalities of the abductor digiti minimi muscle belly.

"Antero-medial load shift" in unilateral plantar heel pain - A cross-sectional exploratory study

BACKGROUND AND PURPOSE

Plantar foot pressure provides an insightful data in the ankle and foot complex which may aid in the detection of underlying pathology. Since individuals with unilateral plantar heel pain (PHP) tend to develop compensatory loading strategies, this study aimed to observe the foot loading pattern compared to the asymptomatic side and its relationship with the morphological variations in individuals with unilateral PHP.

METHODS

It was a prospective cross-sectional study done on 17 participants with unilateral PHP. The calcaneal inclination and calcaneal first metatarsal angles were measured using lateral weight-bearing radiographs for both symptomatic and asymptomatic feet. Static and dynamic plantar foot pressures for both sides were obtained using a "Portable baropodometry platform 0, 5 m Entry Level footscan®.

RESULTS

On the symptomatic side, the pressure in the lateral heel was reduced by 65% in static and 67% in dynamic measurements, while in the medial heel, it was reduced by 16 % in static and 47 % in dynamic measurements compared to that of the asymptomatic side. There was a transfer of pressure from the hind foot to the forefoot by 44 % in static and 46 % in dynamic measurements resulting in anterior load shift. It was also observed that the prevalence of PHP was higher in the normal arched foot (59%).

CONCLUSION

Based on the observations, compared to the asymptomatic side, patients with unilateral plantar heel pain exhibited an anteromedial load shift (AMLS) in their plantar pressures. PHP was reported higher in the foot with normal morphology.

LEVEL OF EVIDENCE

Level 4.

Bilateral Paired Calcaneal Spur: A Rare Entity

Introduction

Heel pain is one of the most common painful conditions of the foot. There are many causes of heel pain, which are usually associated with calcaneal spurs. Hence, it becomes imperative to diagnose and treat them effectively. The development of calcaneal spur is somewhat not well known but is often said to be developed from inflamed plantar fascia. Heel being weight-bearing part of the body, it is very painful something and adversely affects the activity of daily living. Calcaneal spurs are fibrocartilaginous triangular projections from an insertional area of the plantar fascia. Calcaneal spurs are usually single in number but can vary in size. Paired or double calcaneal spurs are not yet reported in the literature and further, the occurrence of bilateral paired calcaneal spurs is extremely rare too. The aim of this case report is to report the occurrence of bilateral paired or double calcaneal spurs.

Case Report

A 56-year-old man presented himself at the orthopedics outpatient department with spontaneous onset bilateral heel pain for the past few months. The pain was more in the morning as soon as he gets up from bed and persisted throughout the day with variable intensity.

Conclusion

The presence of calcaneal spur is usually symptomatic and may be asymptomatic sometimes. The presence of symptomatic bilateral paired calcaneal spur is rare and the present case report may be helpful for further study.

Efficacy of Extracorporeal Shock Wave and Pulse Electromagnetic Field Therapies in Calcaneal Spurs

BACKGROUND

Various treatment methods are available for calcaneal spur, which can cause disability. Objective: To evaluate the efficacy of pulsed electromagnetic field therapy (PEMFT) added to extracorporeal shock wave therapy (ESWT) on pain and functional capacity in treating calcaneal spurs.

METHODS

Patients with calcaneal spurs who were recommended ESWT or ESWT+PEMFT and whose Foot Function Index (FFI) and visual analogue scale (VAS) values were available in their records were retrospectively analyzed. The two groups were ESWT (n=35) and ESWT+PEMFT (n=40). FFI and VAS scores were obtained from their records before treatment, after treatment, and in the third month after treatment.

RESULTS

The two groups were similar regarding their pre-treatment FFI and VAS scores. In intra-group evaluation, statistically significant decreases were found in terms of the FFI pain, disability, and activity limitation and VAS scores in both groups after treatment and in the third month after treatment compared to the pre-treatment period. In the comparison between the groups, the post-treatment and post-treatment third-month FFI pain, disability, and activity limitation and VAS scores were significantly lower in the PEMFT+ESWT group than the ESWT group (P<0.001).

CONCLUSION

A calcaneal spur is a condition that can cause pain and functional limitation in patients. Various studies have demonstrated the efficacy of ESWT in the treatment of calcaneal spurs. In our study, we observed that PEMFT added to ESWT significantly improved the pain and functionality of the patients. Further studies are needed to evaluate the efficacy of PEMFT in calcaneal spurs.

Treatment of Plantar Fasciitis in Patients with Calcaneal Spurs: Radiofrequency Thermal Ablation or Extracorporeal Shock Wave Therapy?

BACKGROUND AND OBJECTIVES

We aimed to compare the effectiveness of ESWT (Extracorporeal Shock Wave Therapy) and RFA (Radiofrequency Thermal Ablation) on pain, disability, and activity limitation in the treatment of plantar fasciitis in patients with calcaneal spurs.

MATERIALS AND METHODS

Patients who apply to Orthopedics and Traumatology and Physical Medicine and Rehabilitation departments with a complaint of heel pain are included in this retrospective study. We included patients diagnosed with calcaneal spurs who received treatment with ESWT (n = 80) and RFA (n = 79) between 1 August 2021 and 1 September 2022. All patients were evaluated using the Visual Analog Scale (VAS), Foot Function Index (FFI), and the Roles and Maudsley score (RM) before and after treatment. An evaluation was performed on average 6 months after treatment.

RESULTS

This study included 79 RFA patients (34 females and 45 males) with a mean age of 55.8 ± 9.6 years and 80 ESWT patients (20 females and 60 males) with a mean age of 49.1 ± 9.5 years. There was a significant decrease in VAS scores after treatment in both the RFA and ESWT groups (z: -4.98, z: -5.18, respectively, p < 0.001). The reductions in FFI pain, FFI activity restriction, FFI disability, and RM scores were significant in both groups, although the scores after treatment were lower in the RFA group.

CONCLUSIONS

This study demonstrates that ESWT and RFA significantly reduced pain, disability, and activity restriction in the treatment of plantar fasciitis in patients with calcaneal spurs. ESWT proved particularly effective in alleviating pain, whereas RFA had more pronounced effects on reducing disability and activity limitations. The choice of treatment should be based on the patient's specific complaints.

Key Considerations When Targeting a Heel Spur

Heel spur is a common medical condition that can cause substantial discomfort and reduce the quality of life of the affected patients. When seeking treatment for a heel spur, it is important to consider the differential diagnoses and underlying medical conditions that may contribute to the symptoms. This manuscript aims to explore several distinctive diagnostic possibilities, essential factors to consider, and practical strategies for managing heel spurs. This paper explains the common differential diagnoses and addresses medical conditions related to heel spurs. The importance of accurate diagnosis in planning treatment protocol is highlighted. In addition, we explain treatment strategies, including preventive measures, conservative treatments, and more advanced procedures. Physicians can help relieve pain and improve the quality of life of the affected individuals by considering the diverse aspects of managing heel spurs.

Does the slope and length of the plantar calcaneal spur affect the clinic?

Since some of the patients with plantar calcaneal spur (PCS) do not have pain, we aimed to investigate the effect of the slope and length of the spur on this situation. The length and slope of PCS were measured by examining the radiological images of 50 patients in this prospective study. VAS, AOFAS and FFI scores of the patients were determined. Patients were divided into groups according to PCS length and slope. According to the slope of the spur, the mean AOFAS, FFI and VAS scores were, respectively; 94, 38, 1.3 in below 20 degrees; 80.1, 86.8, 4.8 in 20-30 degrees; and 70.1, 106, 6.7 in above 30 degrees. According to the length of the spur, the mean AOFAS, FFI and VAS scores were respectively; 84.9, 68.2, 3.7 in those with length 0-5 mm; 81.1, 81.7, 4.5 in those with a length of 5-10 mm; and 71.7, 102.5, 6.4 in those with a length of >10 mm. A significant correlation was found between the angle and length of the PCS with the values of VAS, AOFAS and FFI (p<0.05). We observed that PCSs with a slope of less than 30 degrees and shorter than 10 mm do not create a serious clinical picture. If there is severe pain and functional impairment in individuals with this characteristic spur, investigation of other possible causes of heel pain must be considered.

The Efficacy of Focused Extracorporeal Shock Wave Therapy and Ultrasound Therapy in the Treatment of Calcar Calcanei: A Randomized Study

The prospective, simple randomized study assesses the effect of focused extracorporeal shock wave therapy (f-ESWT) on pain intensity and calcification size compared to the application of ultrasound physical therapy in treating patients with calcar calcanei. A total of 124 patients diagnosed with calcar calcanei were consecutively included in the study. The patients were divided into two groups: the experimental group (n = 62), which included the patients treated with f-ECWT, and the control group (n = 62), consisting of patients treated with the standard ultrasound therapy method. The experimental group's patients received ten therapy applications spaced seven days apart. The patients in the control group had ten ultrasound treatments on ten consecutive days over two weeks. All patients in both groups were tested using the Visual Analog Scale (VAS) to measure pain intensity before the beginning and at the end of treatment. The size of the calcification was assessed in all patients. The study hypothesizes that f-ESWT reduces the pain and the size of the calcification. Pain intensity reduction was registered in all patients. The calcification size in patients in the experimental group was reduced from the initial range of 2 mm-15 mm, to a content of 0.0 mm-6.2 mm. The calcification size in the control group ranged from 1.2 to 7.5 mm, without any change. None of the patients experienced any adverse reactions to the therapy. Patients treated with standard ultrasound therapy did not have a statistically significant reduction in the calcification size. In contrast, the patients in the experimental group treated with f-ESWT showed a substantial decrease in the calcification size.

Comparison between radial and focused types of extracorporeal shock-wave therapy in plantar calcaneal spur: A randomized sham-controlled trial

OBJECTIVES

Both radial and focused types of extracorporeal shock wave therapy (ESWT) have been used in patients with plantar calcaneal spur (PCS). However, no study has yet addressed the comparative effects of these treatments on the condition. Considering radial and focused waves are different from each other, their effectiveness may also be different in clinical practice. The aim of this study was to compare the effects of radial and focused types of ESWT on PCS.

METHODS

Ninety-nine patients with plantar calcaneal spur were randomised into three groups according to ESWT types: focused, radial, and sham. ESWT was applied as three sessions, with 2-4 days intervals (excluding weekends). All patients were evaluated at baseline (week 0) and weeks 1, 5, and 13. The Foot Function Index (FFI) scores were used as outcome measures.

RESULTS

Compared with baseline (week 0), at the end of treatment (week 1) and at the follow-up periods (weeks 5, and 13) the FFI scores were significantly reduced in both focused and radial ESWT groups (for all, p < 0.001). When considering the change in data from baseline to follow-up periods (weeks 5, and 13), both focused and radial ESWT groups were significantly superior to the sham group in the all outcome measures (for all, p < 0.05). Importantly, the radial group was significantly superior to focused group based on the changes in the FFI scores (for all, p < 0.05).

CONCLUSION

Both focused ESWT and radial ESWT are effective in plantar calcaneal spur. When considering the degree and continuity of the positive effects, radial ESWT is superior to focused ESWT in plantar calcaneal spur.

Do the presence, size, and shape of plantar calcaneal spurs have any significance in terms of pain and treatment outcomes in patients with plantar fasciitis?

BACKGROUND

: The purpose of this study was to determine the effect of the presence, size, or type of calcaneal spurs on pain or the outcomes of extracorporeal shock wave therapy (ESWT) therapy in patients with plantar fasciitis.

METHODS

Seventy-four patients with unilateral plantar fasciitis who had no pain in the contralateral foot, either currently or in the past, were included in the study. The length, base width, type, and presence of plantar calcaneal spurs in both heels of the patients were determined using radiography. A total of five sessions of ESWT (3 bar, 2000 shocks/session, 12 Hz frequency) with an interval of 3 days were performed on the painful sides of the patients. Symptom duration and numerical rating scale (NRS) scores were recorded pretreatment and 1 week and 12 weeks after treatment.

RESULTS

: Spurs were detected in 85.1% of painful feet and 71.6% of painless feet, this difference was statistically significant (p = 0.046). There was no significant correlation between the type of the spurs and whether the foot was painful. Patients with spur sizes of >5 mm or with horizontal and hooked spurs had a higher NRS decrease than patients with spur sizes of ≤5 mm or with a vertical spur. Symptom duration, spur length, and base width were found to be correlated with pretreatment NRS scores.

DISCUSSION

The presence and size of calcaneal spurs are associated with pain. However, it should be kept in mind that a high rate of spurs can also be found in painless feet, so spur is not the only factor that causes pain. Patients with a spur size of ≤5 mm or a vertical spur have less pain relief with ESWT.

Ultrasound-Guided Injection of Dextrose Versus Corticosteroid in Chronic Plantar Fasciitis Management: A Randomized, Double-Blind Clinical Trial

DESIGN

Chronic plantar fasciitis (PF) is a common cause of chronic heel pain, with different conventional treatment options. In this randomized clinical trial, the effect of ultrasound-guided injection of dextrose versus corticosteroid in chronic PF was evaluated and compared.

METHODS

A total of 44 patients suffering from chronic PF who visited the physical medicine and rehabilitation clinic were enrolled in the study. Two table-randomized groups were formed. They received an ultrasonography-guided, single injection of either 40 mg methylprednisolone or 20% dextrose. Numeric Rating Scale (NRS), Foot and Ankle Ability Measure questionnaire with 2 subscales, Activities of Daily Living (FAAM-A) and Sports (FAAM-S), along with ultrasonographic parameters were evaluated before and at 2 and 12 weeks after the injection. Results. A total of 40 participants completed the study. Both interventions significantly improved pain and function at 2 and 12 weeks postinjection. After 2 weeks, compared with the dextrose prolotherapy, the corticosteroid group had significantly lower daytime and morning NRS scores (2.55 vs 4.1, P = .012, and 2.75 vs 4.65, P = .004), higher FAAM-S (66.84 vs 54.19; P = .047), and lower plantar fascia thickness at insertion and 1 cm distal to the insertion zone (3.89 vs 4.29 mm, P = .004, and 3.13 vs 3.48 mm, P = .002), whereas FAAM-A was similar in both groups (P = .219). After 12 weeks, all study variables were statistically similar between corticosteroid and dextrose prolotherapy groups. No injection-related side effects were recorded in either group.

CONCLUSION

Both methods are effective. Compared with dextrose prolotherapy, our results show that corticosteroid injection may have superior therapeutic effects early after injection, accompanied by a similar outcome at 12 weeks postinjection.

LEVELS OF EVIDENCE

Level II.

Comparison of Isolated Calcaneal Spur Excision and Plantar Fasciotomy in Addition to Spur Excision in Patients With Plantar Heel Pain Accompanied by Calcaneal Spur

INTRODUCTION

The aim of this study is to clinically compare isolated calcaneal spur excision and plantar fascia release in addition to spur excision in patients with plantar heel pain accompanied by a calcaneal spur.

METHOD

Patients who did not benefit from conservative treatment and underwent surgical excision of the calcaneal spur and/or plantar fasciotomy were retrospectively evaluated. The patients were divided into two groups according to the surgical procedure performed. The evaluation was done according to the pre- and postoperative foot function index (FFI) using pain and functional evaluation. Pain, disability, and activity restriction were evaluated with FFI. The radiological results and FFI scores of both groups were measured before and after surgery, and the difference between the groups was compared.

RESULTS

Of the 46 patients in our study group, 30 (65.2%) were female, and 16 (34.8%) were male. The average age was 41.2 years. There was a significant improvement in postoperative FFI scores in both groups. There was no significant difference in postoperative functional results when the groups were compared.

CONCLUSION

In patients whose plantar heel pain associated with calcaneal spur does not improve despite conservative treatments, both isolated spur excision and plantar fascia release in addition to spur excision may be effective treatment modalities that improve foot functions.

Calcaneal Spurs: A Potentially Debilitating Disorder

Feet are often the most neglected part of the body, all the while being the highly dependent part of daily work and mobility. The lack of attention to them can lead to painful conditions such as calcaneal spurs and associated conditions. Calcaneal spurs are bony projections that form around the calcaneal bone, the strongest, most significant, and posterior-most bone in the feet. The classic symptom of the calcaneal spur is talalgia, commonly known as heel pain. There are many causes of heel pain, which are usually associated with calcaneal spurs. Hence it becomes imperative to diagnose and treat them effectively. The development of calcaneal spur is shrouded in mystery, and why a few individuals are more prone to developing the condition than others depends on their gender, age, occupation, and lifestyle. Calcaneal spurs are seen in association with many diseases. It is also regarded as the etiological factor in plantar fasciitis and increasing body weight and as a complication in arthropathies, Gout, pes cavus, and pes planus. This review article aims to highlight a relationship between those factors while also summarizing the treatment modalities present today. Hence, it promotes the usage of a model for administering treatment based on a tier-wise follow-up procedure, where the response to a particular treatment is recorded. If it does not resolve the spur, the treatment progresses to the next tier. This review article hopes to shed light on the understanding and treatment of calcaneal spurs.

Effectiveness of mechanical treatment with customized insole and minimalist flexible footwear for women with calcaneal spur: randomized controlled trial

BACKROUND

Calcaneal spurs are described as bony outgrowths arising on medial calcaneal, where inappropriate footwear can promote disease progression.

OBJECTIVE

Investigate the effectiveness of mechanical treatment with customized insole and minimalist flexible footwear during gait training program in women with calcaneal spur.

METHODS

Design: A single-blinded, randomized and controlled trial.

SETTING

Biomechanics laboratory.

PARTICIPANTS

Forty-three women, 29 with calcaneal spur and 14 control.

INTERVENTION

Gait training program with use of the minimalist flexible footwear (MFG n = 15, age: 48.9 ± 9.4, height: 1.61 ± 0.1, BMI: 32.1 ± 7.0) and customized insole on footwear (COIG n = 14, age: 50.3 ± 5.8, height: 1.62 ± 0.1, BMI: 32.2 ± 4.3) and control (CG n = 14, age: 47.8 ± 8.6, height: 1.63 ± 0.1, BMI: 27.5 ± 4.5), followed of the evaluations: baseline (T0) and after three (T3) and six (T6) months. Duration of the intervention was of the six months consecutive for at least 42 h per week (six hours a day, seven days a week). Outcome primary were calcaneus pain (visual analogue scale), Foot Function Index (FFI), Foot Health Status Questionnaire (FHSQ-Br) and 6-min walk test (6MWT). Secondary was plantar pressure distribution by a pressure platform system during gait and static index foot posture (FPI).

STATISTICAL ANALYSIS

analysis of variance for repeated measure and between groups were used to detect treatment-time interactions (α = 5%). Effect size with D Cohen's also was used between T0 and after six (T6) months of intervention.

RESULTS

The MFG and COIG were effective at reducing pain after six months (MFG: 2.5-4.5 CI, p = 0.001; COIG: 1.5-3.5 CI, p = 0.011). The FFI and FHSQ-Br showed improvements with MFG and COIG after T6 (MFG: 13.7-15.4 CI, p = 0.010; COIG: 11.3-15.0 CI, p = 0.001). The 6MWT increased with MFG (589.3-622.7 CI) and COIG (401.3-644.7 CI) and foot pronation was decreased after T3 and T6 MFG (FPI Right: 4.2-5.4 CI; Left: 3.6-5.4 CI) COIG (FPI Right: 3.4-6.8 CI; Left: 3.3-5.7 CI). The contact area reduced on forefoot and rearfoot with MFG and GOIG and midfoot and rearfoot with MFG. Maximum force was reduced on foot with MFG after T3 and T6. The peak pressure was reduced on the forefoot with MFG and COIG and on midfoot and rearfoot with MFG.

CONCLUSIONS

The mechanical treatment with customized insole and minimalist flexible footwear during gait training program during six months in women with calcaneal spur reduced the calcaneus pain, increased function and health feet and reduced plantar load on the rearfoot, midfoot and forefoot. However, the footwear alone was more effective than when combined customized insole, given the greater efficacy on clinical and biomechanical aspects.

TRIAL REGISTRATION

ClinicalTrials.gov NCT03040557 (date of first registration: 02/02/2017).

Quality and readability of online information on plantar fasciitis and calcaneal spur

Plantar fasciitis and calcaneal spur are common causes of heel pain in the community. People use the Internet to obtain medical information about diseases. We reviewed Internet information sources on plantar fasciitis and calcaneal spur for quality and readability. The first 50 websites for each search term ("calcaneal spur", "heel spur", and "plantar fasciitis") were scanned on www.google.com . Six different valid tools were used for information quality and readability assessment. We searched for HONCode (Health On the Net Foundation Code) stamps on included websites. The total mean points for DISCERN were 50.52 ± 14.62, and the total mean points for JAMA (Journal of the American Medical Association) were 2.42 ± 1.26. In total, 25.72% of 97 websites had HONCode stamps. The average scores for the readability indicators were calculated to be Flesch-Kincaid Grade Level (FKGL): 7.27 ± 1.71, Gunning Fog: 8.46 ± 2.17, Simple Measure of Gobbledygook (SMOG): 6.89 ± 1.24, and Coleman Liau Index: 15.56 ± 1.85. In our study, when the website resources were examined, there were profit websites the most and website quality and readability were moderate level. A significant proportion of the websites have a financial bias and provide low-quality information. A mechanism for monitoring the quality and readability of online information must be established and managed systematically.

The co-occurrence of calcaneal spur and hallux valgus: A radiological evaluation

BACKGROUND

Calcaneal spur and hallux valgus are common foot deformities and both conditions have been shown to disrupt foot biomechanics.

OBJECTIVES

This study aimed to investigate the association between calcaneal spur and hallux valgus using radiographic and demographic data.

METHODS

A total of 1375 patients (1083 women; mean age: 45.5 years) with standard ankle lateral and foot conventional anteroposterior radiographs were evaluated. The following data were obtained: age, gender, laterality, hallux valgus angle (HVA), intermetatarsal angle (IMA), and calcaneal spur. Patients with a HVA of 15∘ and above were considered to have hallux valgus. Patients with hallux valgus were classified into three different groups according to the HVA.

RESULTS

The prevalence of calcaneal spur was higher in older age and women (45.8%, 30.2%; p< 0.01, p< 0.01, respectively). Subjects with and without calcaneal spurs had similarities in terms of their laterality, having a HVA of ⩾ 15∘ and an IMA of ⩾ 11∘ (p> 0.05). Hallux valgus severity was not associated with calcaneal spur (p> 0.05). In addition, the hallux valgus prevalence was higher in patients who were over 50 years old (58.2%, p= 0.046).

CONCLUSIONS

The presence of calcaneal spurs does not affect the prevalence of hallux valgus. The severity of hallux valgus determined according to the HVA was similar in patients with and without calcaneal spurs. In addition, female gender and older age were identified as risk factors for calcaneal spurs, while only older age was a risk factor for hallux valgus.

Modulation of Differentiation and Bone Resorbing Activity of Human (Pre-) Osteoclasts After X-Ray Exposure

Low-dose radiotherapy (LD-RT) is a local treatment option for patients with chronic degenerative and inflammatory diseases, in particular musculoskeletal diseases. Despite reported analgesic and anti-inflammatory effects, cellular and molecular mechanisms related to osteoimmunological effects are still elusive. Here we test the hypothesis that X-irradiation inhibits the differentiation of precursor osteoclasts into mature osteoclasts (mOC) and their bone resorbing activity. Circulating monocytes from healthy donors were isolated and irradiated after attachment with single or fractionated X-ray doses, comparable to an LD-RT treatment scheme. Then monocytes underwent ex vivo differentiation into OC during cultivation up to 21 days, under conditions mimicking the physiological microenvironment of OC on bone. After irradiation, apoptotic frequencies were low, but the total number of OC precursors and mOC decreased up to the end of the cultivation period. On top, we observed an impairment of terminal differentiation, i.e. a smaller fraction of mOC, reduced resorbing activity on bone, and release of collagen fragments. We further analyzed the effect of X-irradiation on multinucleation, resulting from the fusion of precursor OC, which occurs late during OC differentiation. At 21 days after exposure, the observation of smaller cellular areas and a reduced number of nuclei per mOC suggest an impaired fusion of OC precursors to form mOC. Before, at 14 days, the nuclear translocation of Nuclear Factor Of Activated T Cells 1 (NFATc1), a master regulator of osteoclast differentiation and fusion, was decreased. In first results, obtained in the frame of a longitudinal LD-RT study, we previously reported a pain-relieving effect in patients. However, in a subgroup of patients suffering from Calcaneodynia or Achillodynia, we did not observe a consistent decrease of established blood markers for resorption and formation of bone, or modified T cell subtypes involved in regulating these processes. To assess the relevance of changes in bone metabolism for other diseases treated with LD-RT will be subject of further studies. Taken together, we observed that in vitro X-irradiation of monocytes results in an inhibition of the differentiation into bone-resorbing OC and a concomitant reduction of resorbing activity. The detected reduced NFATc1 signaling could be one underlying mechanism.

Fluoroscopic and Endoscopic Calcaneal Spur Resection Without Plantar Fascial Release for Recalcitrant Plantar Fasciitis

Background

Studies on endoscopic calcaneal spur resection (CSR) without plantar fascial release (PFR) are limited. This study aimed to review the data of patients who underwent fluoroscopic and endoscopic CSR without PFR for plantar fasciitis with a calcaneal spur to assess the effectiveness of CSR.

Methods

Medical records of consecutive patients with plantar fasciitis with ≥2 mm calcaneal spur who underwent endoscopic CSR without PFR from November 2017 to December 2019 were reviewed. Patients with ≥2 years of follow-up were included, whereas those who underwent another surgery on the operated foot were excluded. Age, body mass index (BMI), follow-up duration, calcaneal spur length, duration to full weightbearing postoperatively, Japanese Society for Surgery of the Foot (JSSF) score, visual analog scale (VAS) score for pain, and complications were assessed.

Results

The mean follow-up duration was 2.7 years. A total of 47 patients (31 female, 16 male; mean age, 56.4 years; mean BMI, 25.5) were included. The mean calcaneal spur length was 5.7 mm. The VAS score improved from 79.6 ± 12.9 mm preoperatively to 5.3 ± 7.3 mm postoperatively. The JSSF score improved from 54.0 ± 19.1 points preoperatively to 97.5 ± 5.7 points postoperatively (Wilcoxon signed-rank test, P < .001, respectively). The mean duration to full weightbearing postoperatively was 4.4 ± 4.2 days. Two patients presented with tenderness, and one presented with hypesthesia at the portal site.

Conclusion

Endoscopic CSR without PFR resulted in good outcomes, early return to full weightbearing, and few complications in patients with plantar fasciitis with ≥2 mm calcaneal spur. The results suggested that CSR was sufficient to relieve symtoms and improve function. PFR may not be necessary for treating plantar fasciitis with calcaneal spur.

Level of Evidence

Level IV, retrospective case series.

The levels of 25-hydroxy vitamin D, parathyroid hormone, calcitonin and lipid profiles in patients with calcaneal spur

Objectives

The aim of this study was to investigate the 25-hydroxyvitamin D (25(OH)D), parathyroid hormone (PTH), and calcitonin levels and lipid profiles in patients with calcaneal spurs.

Patients and methods

Between March 2018 and June 2019, a total of 50 patients (30 males, 20 females; mean age: 39.8±8.1 years; range, 24 to 54 years) admitted to our clinic with heel pain and diagnosed with heel spurs based on radiographic images were included. The control group consisted of 50 age- and sex-matched healthy volunteers (32 males, 18 females; mean age: 35.7±9.6 years; range, 20 to 56 years). Blood samples were collected from all participants. Total cholesterol, high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol (LDL-C), triglyceride, phosphate, and calcium levels were measured using the colorimetric method. The PTH and 25(OH)D levels were measured using the chemiluminescent microparticle immunoassay. Calcitonin levels were detected using the chemiluminescent immunometric assay.

Results

In the patients with calcaneal spurs, 25(OH)D and HDL-C levels were significantly lower (p<0.001), while LDL-C, triglyceride, and PTH levels were significantly higher (p<0.05, p<0.002 and p<0.001, respectively). There was no significant difference in the calcium, phosphate, body mass index, and calcitonin levels between the groups.

Conclusion

Our study results suggest that calcaneal spur formation is associated not only with weight-related pressure, but also with lipid levels and hormonal alterations involved in calcium metabolism. Based on these findings, hormonal alterations and lipids should be considered in patients with calcaneal spurs.

Medical imaging for plantar heel pain: a systematic review and meta-analysis

Background

Medical imaging can be used to assist with the diagnosis of plantar heel pain. The aim of this study was to synthesise medical imaging features associated with plantar heel pain.

Methods

This systematic review and meta-analysis conducted searches in MEDLINE, CINAHL, SPORTDiscus, Embase and the Cochrane Library from inception to 12th February 2021. Peer-reviewed articles of cross-sectional observational studies written in English that compared medical imaging findings in adult participants with plantar heel pain to control participants without plantar heel pain were included. Study quality and risk of bias was assessed using the National Institutes of Health quality assessment tool for observational cohort and cross-sectional studies. Sensitivity analyses were conducted where appropriate to account for studies that used unblinded assessors.

Results

Forty-two studies (2928 participants) were identified and included in analyses. Only 21% of studies were rated ‘good’ on quality assessment. Imaging features associated with plantar heel pain included a thickened plantar fascia (on ultrasound and MRI), abnormalities of the plantar fascia (on ultrasound and MRI), abnormalities of adjacent tissue such as a thickened loaded plantar heel fat pad (on ultrasound), and a plantar calcaneal spur (on x-ray). In addition, there is some evidence from more than one study that there is increased hyperaemia within the fascia (on power Doppler ultrasound) and abnormalities of bone in the calcaneus (increased uptake on technetium-99 m bone scan and bone marrow oedema on MRI).

Conclusions

People with plantar heel pain are more likely to have a thickened plantar fascia, abnormal plantar fascia tissue, a thicker loaded plantar heel fat pad, and a plantar calcaneal spur. In addition, there is some evidence of hyperaemia within the plantar fascia and abnormalities of the calcaneus. Whilst these medical imaging features may aid with diagnosis, additional high-quality studies investigating medical imaging findings for some of these imaging features would be worthwhile to improve the precision of these findings and determine their clinical relevance.

Supplementary Information

The online version contains supplementary material available at 10.1186/s13047-021-00507-2.

Age, Body Mass Index, and Spur Size Associated with Patients’ Symptoms in Plantar Fasciitis

Background

Plantar fasciitis is a common cause of heel pain affecting 10% of the general population. This study aimed to investigate the specific symptoms in patients with plantar fasciitis using the Foot and Ankle Outcome Score (FAOS) questionnaire and their relationship with demographic and radiographic factors.

Methods

We retrospectively analyzed 73 consecutive patients (mean age, 53.8 ± 10.0 years; 20 men and 53 women) with plantar fasciitis who had visited our foot and ankle clinic and undergone weight-bearing foot X-ray examinations. Their demographic data, anteroposterior and lateral talo-first metatarsal angles, intermetatarsal and hallux valgus angles, and responses to the FAOS questionnaire were recorded.

Results

The quality-of-life subscale showed the lowest score of all FAOS subscales. Age was significantly correlated with quality of life (r = 0.297, p = 0.011), and body mass index was correlated with the function in sports and recreational activities (r = –0.251, p = 0.032). Age and body mass index were statistically significantly correlated with calcaneal spur size (r = 0.274, p = 0.027 and r = 0.324, p = 0.008, respectively). The calcaneal spur size was significantly correlated with pain (r = –0.348, p = 0.004), function in daily living (r = –0.410, p = 0.001), and function in sports and recreational activities (r = –0.439, p < 0.001).

Conclusions

Demographic factors were associated with specific symptoms in patients with plantar fasciitis. Calcaneal spur size was the only radiographic parameter correlated with symptoms. These findings help communicate with patients, set appropriate treatment goals, and evaluate treatment effectiveness.

Effects of intralesional pulsed radiofrequency treatment on pain in patients with calcaneal spur: results of 460 patients

Background

This study aimed to investigate the efficacy of intralesional pulsed radiofrequency (RF) in the treatment of calcaneal spur and the results of patients who underwent single and double sessions of RF treatment.

Methods

The population of this retrospective study consisted of 460 patients who were diagnosed with calcaneal spur with clinical examination and direct radiography. The Wong-Baker Faces Pain Rating Scale and The American Orthopaedic Foot and Ankle Society (AOFAS) Ankle-Hindfoot Score were used to determine the pain status and functional capacities of the patients. Posttreatment evaluation was carried out on average in the 6th week.

Results

The study involved 460 patients, 76.9% of whom were female, with the average age of 50.8 ± 10.9 years in total. Of the patients 43% was given RF therapy in a single session, and 57% of them in double sessions. After the RF procedure, the number of patients whose pain decreased according to both AOFAS and Wong-Baker pain scoring systems increased statistically significantly (p < 0.001). There was a statistically significant increase in the AOFAS-pain scores and the total AOFAS scores and a significant decrease in the Wong Baker-pain scale after treatment. However, there was no significant change in treatment success with respect to the number of RF sessions. Although not statistically significant, the differences in the AOFAS-pain scores and in the total AOFAS scores were found to be higher in patients who underwent single session RF, while the difference in the Wong Baker-pain ranking was higher in patients who received double sessions RF.

Conclusion

Intralesional pulsed RF procedure can be preferred as a relatively less invasive method that does not have any serious complications in patients with persistent calcaneal spurs who do not respond to the use of oral anti-inflammatory drugs and shoe insoles, nor corticosteroid injection to the lesion area.

Radiologic and Demographic Characteristics of Patients With Plantar Calcaneal Spur

Many people with heel pain in the general population are often diagnosed with plantar calcaneal spurs (PCS). The aim of this study was to evaluate the radiological and demographic characteristics of PCS patients and to compare the differences with the control group. In 2018, 420 patients with weightbearing lateral ankle X-ray images were included in the study. The patients were divided into 2 groups as PCS group and control group. Groups were compared age and age group (20-29, 30-39, 40-49, 50-59, 60-69, 70 and over) weight, height, body mass index (<25, 25-30, >30), chronic diseases as demographically and were also compared radiologically as calcaneal inclination angle (CIA), lateral talocalcaneal angle (LTCA), Bohler angle and Gissane angle. A statistically significant relationship was found between gender and PCS. Plantar calcaneal spur is more common in females than in males (X²:8.101, p < .03). PCS was less common in patients with BMI <25 and 25-29.9, whereas PCS is more common in patients with BMI >30 (X²:7.698, p < .021). Although the CIA angle was within normal limits in both groups, it was significantly lower in patients with PCS than in the control group(p < .05). There was no statistically significant difference between the 2 groups in terms of age, chronic disease, LTCA, Bohler angle, Gissane angle. Female gender and obesity are among the risk factors for PCS formation. CIA may have an important role in PCS formation. In order to clarify the etiology and pathophysiology of PCS, further studies with radiological features are needed.

Why heel spurs are traction spurs after all

It is unclear whether plantar and posterior heel spurs are truly pathological findings and whether they are stimulated by traction or compression forces. Previous histological investigations focused on either one of the two spur locations, thereby potentially overlooking common features that refer to a uniform developmental mechanism. In this study, 19 feet from 16 cadavers were X-ray scanned to preselect calcanei with either plantar or posterior spurs. Subsequently, seven plantar and posterior spurs were histologically assessed. Five spur-free Achilles tendon and three plantar fascia entheses served as controls. Plantar spurs were located either intra- or supra-fascial whereas all Achilles spurs were intra-fascial. Both spur types consistently presented a trabecular architecture without a particular pattern, fibrocartilage at the tendinous entheses and the orientation of the spur tips was in line with the course of the attached soft tissues. Spurs of both entities revealed tapered areas close to their bases with bulky tips. Achilles and plantar heel spurs seem to be non-pathological calcaneal exostoses, which are likely results of traction forces. Both spur types revealed commonalities such as their trabecular architecture or the tip direction in relation to the attached soft tissues. Morphologically, heel spurs seem poorly adapted to compressive loads.

Triad of foot deformities and its conservative treatment: With a 3D customized insole

The coexisting of three deformities as hallux valgus, flatfoot, and the calcaneal spur is an undefined medical condition, and it may be called triad of foot deformities (TFD) as a definition for a new disease entity. A customized 3D insole prototype was created by postprocessing of MRI data, and printed by 3D printer technology for the purpose of providing effective and innovative treatment for TFD. A 42 years-old female was clinically examined for TFD findings. All radiological measurements were made on the weightbearing anteroposterior and lateral X-rays. The patient underwent the pedogram (RSscan International, footscan©). MRI images were taken for the purpose of 3D scanning that was used for producing the 3D splint for TFD. AOFAS (American Orthopedic Foot and Ankle Society scores) and FHSQ (Foot Health Status Questionnaire) were used for clinical follow-up. MRI images of the patient were imported to Mimics software in order to create a 3D model using image processing. Thus, Patient-Specific 3D customized silicone orthotic insole that was based on 3D printing technology was produced. The one-simple test was used to compare the results of AOFAS and FHSQ scores. The measurements of radiological measurements were given. On the clinical follow-up, AOFAS was FHSQ scores were obtained. There was a significant difference in terms of AOFAS and FHSQ scores (p ≤ 0.05). As a result of our study; our 3D customized insole was produced at the price of approximately 1/3 of the total cost of three standard medical products. The coexisting of these three deformities may be called triad of foot deformities (TFD). The 3D printer technology enables us to access a customized, personalized conservative treatment option for TFD. The conservative treatment of TFD is possible by a single orthotic insole.

Long-term effect and prognostic factors of a low-dose radiotherapy of painful plantar calcaneal spurs : A retrospective unicenter study

PURPOSE

To estimate the long-term effect of low-dose radiotherapy of painful plantar calcaneal spurs, and to verify possible prognostic factors.

PATIENTS AND METHODS

In this retrospective unicenter study, electronic patient files of patients with painful plantar calcaneal spurs treated with low-dose radiotherapy between July 2009 and February 2020 were reviewed. The low-dose radiotherapy consisted of a total dose of 3.0 Gy given with a fraction dose of 0.5 Gy three times a week. The pain reduction was estimated using a patient questionnaire with a visual analogue scale. Kaplan-Meier statistics and Cox regression analysis were used for the statistical analysis.

RESULTS

Altogether, 864 heels of 666 patients were reviewed. The probability of an insufficient pain control 10 years after low-dose radiotherapy was 45.9% (95% confidence interval 39.4-52.4%) in the subset of patients with a minimum follow-up of 3 months (582 heels of 467 patients). Patients with an unsatisfactory pain reduction 3 months after low-dose radiotherapy were offered a re-irradiation. Forty percent of the patients who received a re-irradiation developed good pain reduction. Occurrence of an initial aggravation of pain during or within 3 months after low-dose radiotherapy (p = 0.005), and treatment of bilateral painful plantar calcaneal spurs (p = 0.008) were identified as significant unfavorable prognostic factors on univariate analysis. On multivariate analysis, the initial aggravation of pain remained as independent significant prognostic factor (p = 0.01). No clear radiation toxicity was observed.

CONCLUSIONS

Low-dose radiotherapy is a safe and effective treatment option for patients with painful plantar calcaneal spurs. An initial aggravation of pain during or within 3 months after radiotherapy was identified as unfavorable prognostic factor for the treatment outcome. Re-irradiation of patients with an unsatisfactory pain reduction after low-dose radiotherapy is effective and should be offered to patients.

The Evaluation of Radiologic Angular Measurements in Patients with Foot Pain

BACKGROUND

The aim of this study was to investigate the relationship between foot deformities by comparing foot radiographs of patients with complaints of foot pain with those of healthy individuals.

METHODS

The study included 30 patients with pes cavus, 30 patients with pes planus, 30 patients with calcaneal spur, and 30 controls aged 30 to 60 years. All participants underwent measurement of right and left foot length; metatarsophalangeal width; and calcaneal pitch (CA), talohorizontal (TA), talometatarsal (TM), and lateral talocalcaneal (LTC) angles from lateral radiographs.

RESULTS

There were no statistically significant differences between all participants regarding sex, age, weight, and body mass index (P > .05). Among patients with clinically diagnosed pes cavus, the diagnostic rate of CA was 100% in both feet, and 83.3% in the right foot and 96.7% in the left foot according to the TM angle. The diagnostic rates of angular measurements in patients with pes planus were as follows: 20% in the right foot and 30% in the left foot depending on the CA angle, 100% in both feet depending on the TM angle, and 66.7% in the right foot and 46.7% in the left foot depending on the LTC angle. A very strong positive correlation was found between the CA and LTC angles in patients with calcaneal spur and pes planus (P < .001); also, statistically significant positive correlation was found between the CA and TA angles (P < .05). The angular measurements in patients with calcaneal spur were found to be consistent with pes planus with a high rate.

CONCLUSIONS

Angular changes caused by deterioration of foot biomechanics lead to various deformities. Pes planus ranks first among these. Therefore, we believe that radiographic angular measurements in patients presenting with foot pain in addition to clinical evaluation would be useful in considering associated deformities and planning treatments.

The Relationship between Calcaneal Spur Type and Plantar Fasciitis in Chinese Population

Plantar heel pain is a common disease with a high incidence in different races. It significantly reduced the quality of life of patients. However, the cause of PHP is still controversial and there were varieties of physiological factors associated with PHP. The most common pathological factor in the population was plantar fasciitis. Some existing research studies had found a correlation between calcaneal spurs and plantar fasciitis, and this study had found the correlation in Chinese population. It is invaluable not only to understand the relationship between different types of plantar calcaneal spurs and plantar fasciitis but also to identify the most appropriate treatment strategies. A total of 71 patients with calcaneal spurs were chosen from the Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University. All 71 patients had completed X-rays and MRI scans; then, surgeons had removed their plantar calcaneal spurs. After surgery, all patients were followed up for 12 months; their prognosis was tested by the VAS and AOFAS scores. Type II (29, 40.8%) had the highest incidence in Chinese population, followed with type I (24, 33.8%) and type III (18, 25.4%). Preoperative VAS scores showed that type II (7.72 ± 1.10) was significantly higher than the other two types (P < 0.001). Postoperative VAS scores of type II were higher than those of type I and type III (P < 0.001). Postoperative AOFAS scores of type II were the lowest (P < 0.001). Researchers had proved that type II was more likely to cause PF.

Coexistence of plantar calcaneal spurs and plantar fascial thickening in individuals with plantar heel pain

Objectives

To examine associations between plantar calcaneal spurs, plantar fascia thickening and plantar heel pain (PHP), and to determine whether tenderness on palpation of the heel differentiates between these presentations.

Methods

Adults aged ⩾50 years registered with four general practices were mailed a Health Survey. Responders reporting foot pain within the last 12 months underwent a detailed clinical assessment. PHP in the past month was documented using a foot manikin. Plantar calcaneal spurs were identified from weight-bearing lateral radiographs and plantar fascia thickening (defined as >4 mm) from ultrasound. Tenderness on palpation of the plantar fascia insertion was documented. Associations between these factors and PHP were explored using generalized estimating equations.

Results

Clinical and radiographic data were available from 530 participants (296 women, mean [s.d.] age 64.9 [8.4] years), 117 (22.1%) of whom reported PHP. Plantar calcaneal spurs and plantar fascia thickening were identified in 281 (26.5%) and 501 (47.3%) feet, respectively, but frequently coexisted (n = 217, 20.4%). Isolated plantar calcaneal spurs were rare (n = 64, 6.0%). Participants with PHP were more likely to have a combination of these features compared with those without PHP (odds ratio 2.16, 95% CI 1.24, 3.77, P = 0.007). Tenderness on palpation of the heel was not associated with plantar calcaneal spurs or plantar fascia thickening, either in isolation or in combination, in those with PHP.

Conclusion

Plantar calcaneal spurs and plantar fascial thickening are associated with PHP, but frequently coexist. Tenderness on palpation of the heel does not appear to differentiate between clinical presentations of PHP.

Pain on the Plantar Surface of the Foot

BACKGROUND

Plantar fasciitis (PF) is characterized by pain on weight-bearing in the medial plantar area of the heel, metatarsalgia (MTG) by pain on the plantar surface of the forefoot radiating into the toes. Reliable figures on lifetime prevalence in Germany are lacking.

METHODS

This review is based on pertinent publications retrieved from a selective search in PubMed, on guidelines from Germany and abroad, and on the authors' clinical experience.

RESULTS

Plantar fasciitis is generally diagnosed from the history and physical examination, without any ancillary studies. In 90-95% of cases, conservative treatment (e.g., stretching exercises, fascia training, ultrasound therapy, glucocorticoid injections, radiotherapy, shoe inserts, and shock-wave therapy) brings about total, or at least adequate, relief of pain within one year. Intractable pain is an indication for surgical treatment by plantar fasciotomy and/or calf muscle release. In metatarsalgia, a directed diagnostic work-up to find the cause is mandatory, including a search for excessive mechanical stress due to abnormal foot posture, neuropathic pain, rheumatoid arthritis, aseptic bony necrosis, or malignant disease; imaging studies and pedobarography are needed. For causally oriented treatment, a wide range of conservative and surgical measures can be considered.

CONCLUSION

The reported results of treatments for plantar fasciitis and metatarsalgia are heterogeneous. The efficacy of the individual measures should be studied in randomized controlled trials.

Effectiveness of Mechanical Treatment for Plantar Fasciitis: A Systematic Review

CONTEXT

Plantar fasciitis is one of the most common foot injuries. Several mechanical treatment options, including shoe inserts, ankle-foot orthoses, tape, and shoes are used to relieve the symptoms of plantar fasciitis.

OBJECTIVES

To investigate the effectiveness of mechanical treatment in the management of plantar fasciitis.

EVIDENCE ACQUISITION

The review was reported in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analysis statement. A systematic search was performed in PubMed, CINAHL, Embase, and Cochrane up to March 8, 2018. Two independent reviewers screened eligible articles and assessed risk of bias using the Cochrane Collaboration's risk of bias tool.

EVIDENCE SYNTHESIS

A total of 43 articles were included in the study, evaluating 2837 patients. Comparisons were made between no treatment and treatment with insoles, tape, ankle-foot orthoses including night splints and shoes. Tape, ankle-foot orthoses, and shoes were also compared with insoles. Follow-up ranged from 3 to 5 days to 12 months. Cointerventions were present in 26 studies.

CONCLUSIONS

Mechanical treatment can be beneficial in relieving symptoms related to plantar fasciitis. Contoured full-length insoles are more effective in relieving symptoms related to plantar fasciitis than heel cups. Combining night splints or rocker shoes with insoles enhances improvement in pain relief and function compared with rocker shoes, night splints, or insoles alone. Taping is an effective short-term treatment. Future studies should aim to improve methodological quality using blinding, allocation concealment, avoid cointerventions, and use biomechanical measures of treatment effects.

Managing the patient with heel pain

Heel pain presents frequently to primary care, commonly affecting athletic and elderly patients. Its presentation can be a common source of confusion for clinicians given the wide variety of differential diagnoses and the similarities in presenting symptoms and signs. This review classifies heel pain according to site of pain and explores the common pathologies clinicians may encounter. A brief summary of common imaging modalities used is provided. The literature is reviewed to guide evidence-based practice and to provide a framework to help clinicians investigate and manage heel pain before onward referral for specialist intervention. A linked article detailing the imaging of heel pain is included in this issue ( https://doi.org/10.12968/hmed.2019.80.4.192 ).

Plantar fasciitis treated with endoscopic partial plantar fasciotomy-One-year clinical and ultrasonographic follow-up

BACKGROUND

Endoscopic operations for plantar fasciitis generally have good clinical outcome. The aim of this study was to record the effect of endoscopic partial fasciotomy and heel spur removal and evaluate by ultrasonography whether the fascia regenerates and the heel spur reforms.

METHODS

Eleven consecutive patients were evaluated before and 3, 6 and 12 months after surgery. Operations were performed endoscopically using a deep fascial approach with a medial and a lateral portal. Bony spurs were removed and the medial half of the plantar fascia was transected. All patients followed a standardized rehabilitation program.

RESULTS

Median Foot Function Index values decreased from 119 pre-surgery to 69 and 12 (p=0.004), at 3 months and 1year post-operatively respectively. Median VAS-score for first step pain was likewise reduced from median 71mm to 29mm and 7mm (p=0.004), respectively. Median fascial thickness at the medial insertion was 6.0mm (range 4.6-6.8mm) pre-operatively. A heel spur was present in 9 cases. One year postoperatively a well-defined fascia in the area of resection was demonstrated in 8 cases. In the rest of the cases scar tissue made it impossible to clearly outline the fascia. Nine of the feet showed good medial fascial tensioning. There was no evidence of recurrence of the bony spur.

CONCLUSIONS

Endoscopic partial plantar fascia resection reduced pain symptoms and increased function significantly 3 months after operation, with additional effect achieved 12 months after surgery. Based on ultrasonography the resected fascia regenerated/healed, and a calcaneal spur did not recur.

Use of artificial neural networks to identify the predictive factors of extracorporeal shock wave therapy treating patients with chronic plantar fasciitis

The purpose of our study is to identify the predictive factors for a minimum clinically successful therapy after extracorporeal shock wave therapy for chronic plantar fasciitis. The demographic and clinical characteristics were evaluated. The artificial neural networks model was used to choose the significant variables and model the effect of achieving the minimum clinically successful therapy at 6-months’ follow-up. The multilayer perceptron model was selected. Higher VAS (Visual Analogue Score) when taking first steps in the morning, presence of plantar fascia spur, shorter duration of symptom had statistical significance in increasing the odd. The artificial neural networks model shows that the sensitivity of predictive factors was 84.3%, 87.9% and 61.4% for VAS, spurs and duration of symptom, respectively. The specificity 35.7%, 37.4% and 22.3% for VAS, spurs and duration of symptom, respectively. The positive predictive value was 69%, 72% and 57% for VAS, spurs and duration of symptom, respectively. The negative predictive value was 82%, 84% and 59%, for VAS, spurs and duration of symptom respectively. The area under the curve was 0.738, 0.882 and 0.520 for VAS, spurs and duration of symptom, respectively. The predictive model showed a good fitting of with an overall accuracy of 92.5%. Higher VAS symptomatized by short-duration, severer pain or plantar fascia spur are important prognostic factors for the efficacy of extracorporeal shock wave therapy. The artificial neural networks predictive model is reasonable and accurate model can help the decision-making for the application of extracorporeal shock wave therapy.

A Rare Cause of Heel Pain: A Calcaneal Spur Fracture

Heel pain is a complaint frequently encountered in orthopedic clinics that has peculiar symptoms and may have various etiologic causes. Calcaneal spur fracture is an extremely rare cause of heel pain, and only four cases had previously been reported in the English language literature. We present a 45-year-old woman who had heel pain on her right foot after falling from a height onto the heel. Radiographic examination of her right foot showed a fractured calcaneal spur, which was successfully treated with conservative methods. Calcaneal heel pain is a complaint that may be attributable to many different etiologic causes, which often have specific symptoms, and we frequently encounter them in the orthopedic clinic. Calcaneal spur fracture after trauma should be remembered in the differential diagnosis of heel pain as a rare cause. Our case is the fifth reported case in the English language literature of this extremely rare condition.

Size of ischial fibro-ostosis is associated with heterotopic ossification after total hip arthroplasty

PURPOSE

The hypothesis of the present study was that degenerative fibro-ostosis (FO) of the ischial hamstring tendon insertion is a risk factor for heterotopic ossification (HO) following THA.

METHODS

We followed 103 consecutive patients (43 males, 60 females, mean age 61 years) who underwent unilateral cementless THA for primary hip osteoarthritis and investigated the incidence of HO within the first 12 months after surgery. On pre-operative radiographs, a standardized evaluation for FO of the ischial hamstring tendon insertion concerning horizontal, vertical, and square dimensions was performed. HO was classified according to Brooker on radiographs at 12 months post-operatively.

RESULTS

At follow-up, 56 patients (54%) had no radiographic evidence of HO, 23 (22%) were classified as Brooker I, 17 (17%) as II, 6 (6%) as III, and 1 (1%) as IV, respectively. Patients with post-operative HO had significantly greater vertical (3.0 mm vs. 2.3 mm, p = 0.001) and horizontal (47.9 mm vs. 39.1 mm, p = 0.025) dimensions of FO than patients without HO. Patients with FO and a vertical dimension of ≥ 2.5 mm were more likely to develop HO (55.6%) than patients with a vertical FO dimension of less than 2.5 mm (34.7%, OR = 2.35 p = 0.047). A weak correlation between the vertical and horizontal size of FO and the severity of HO was observed.

CONCLUSION

Radiographic evidence of asymptomatic FO is a potential risk factor for the development of HO following THA and may be used as a simple diagnostic tool to pre-operatively identify patients at risk for post-operative HO. This association has not been previously described and further research to confirm the present findings and to justify additional prophylactic treatment in these patients is warranted.

Radiologic features in symptomatic/asymptomatic heels of patients with ankylosing spondylitis

AIM

Most heel pain occurs at the posterior or plantar aspect, where main entheses of the heel are located. However, simple radiographs as basic work-up tools, their features based on their association with local symptoms in the heel in ankylosing spondylitis (AS) patients, have rarely been described.

METHOD

Forty patients with AS and unilateral heel pain were enrolled to evaluate radiographic differences between symptomatic and asymptomatic heels. The two groups were assessed according to symptom location: posterior (group PS) or plantar (group PL). Typical abnormalities in bone and/or soft tissue on the heel due to inflammation were compared.

RESULTS

In group PS (20 cases), 19 (95%) symptomatic feet and 7 (35%) asymptomatic feet showed abnormal findings on the posterior heel and symptomatic feet showed 6 (30%) plantar abnormalities. Erosion of the posterior calcaneal tuberosity, obliteration of the retrocalcaneal recess (RR), and swelling shadows with increased thickness on posterior soft tissue were observed more frequently and significantly in symptomatic feet in group PS (P < 0.05). In group PL (20 cases), 11 (55%) symptomatic feet and 8 (40%) asymptomatic feet showed abnormalities on the plantar heel and symptomatic feet showed 14 (70%) posterior abnormalities, and none showed significant differences between symptomatic and asymptomatic feet.

CONCLUSION

Among simple radiographic alterations on heels with AS, such changes around the enthesis of the Achilles as bony erosion and RR obliteration with swollen posterior soft tissue are strongly related to current painful posterior heels. Assessment of enthesitis of the Achilles tendon in AS using plain radiography seems to be valid.

Noninvasive, Multimodality Approach to Treating Plantar Fasciitis: A Case Study

Plantar fasciitis, also referred to as plantar heel pain, is a common foot pathology among runners and other athletes. The clinical guidelines of the 2014 Orthopedic Section of the American Physical Therapy Association states, noninvasive therapies including manual therapy, stretching, taping, foot orthoses, and night splints are recommended as primary interventions. Recent studies suggest acupuncture may be an effective treatment compared to standard treatment for long-term relief. This case study reports the effects of a multimodality approach including massage, gua sha, bleeding, acupuncture, and moxibustion to treat acute plantar heel pain.