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01.12.2015 | Research article | Ausgabe 1/2015 Open Access

BMC Musculoskeletal Disorders 1/2015

Surgical management of hallux valgus and hallux rigidus: an email survey among Swiss orthopaedic surgeons regarding their current practice

Zeitschrift:
BMC Musculoskeletal Disorders > Ausgabe 1/2015
Autoren:
Lukas Daniel Iselin, Georg Klammer, Norman Espinoza, Panagiotis D. Symeonidis, David Iselin, Peter Stavrou
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s12891-015-0751-7) contains supplementary material, which is available to authorized users.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

LDI and GK equally contributed to the writing of the paper. LDI and GK carried out the background literature research. LDI drafted the manuscript. PDG and PS revised the paper. LDI, GK, NE made substantive intellectual contributions to the planning of the study. DI was responsible for the statistical analysis. All authors read and approved the final manuscript.
Abbreviations
SGOT
Schweizer Gesellschaft für Orthopädie und Traumatologie/Swiss Society of Orthopaedic Surgery and Tramatology
SFAS
Swiss foot and ankle society

Background

Hallux valgus and hallux rigidus are common conditions for which numerous operative interventions have been described in the literature [ 14]. Various clinical and radiological criteria have been used to guide the choice of surgical technique [ 57]. The surgeons’ professional background may influence that choice, depending on surgeons’ specialization, age, type and institution of training as well as their orthopaedic cultural orientation [ 820]. In a survey performed with the members of the Australian Orthopaedic Association the surgeon’s membership to the Australian Foot and Ankle Association and age influenced the choice of treatment most. Younger surgeons with a selective foot and ankle training tend to do more Scarf osteotomies in mild to moderate cases and metatarsaophalangeal (MTP)-I fusions in severe Hallux valgus or rigidus. Furthermore a trend to less joint replacements is visible [ 21].
Switzerland is divided into several distinct cultural and linguistic regions that were formed through the variable influences of the surrounding empires (French, German, Austrian and Italian) over time. An influence of the language difference on literature search, decision-making and practice due to membership of the surgeon in e.g. French or Anglo-American professional organization could not a priori be excluded.
Thus we presented the questions of the Australian survey to Swiss orthopaedic surgeons aiming to identify factors that influenced their choice of treatment with special emphasis on that demographic peculiarity [ 21].

Methods

A survey was electronically mailed out to members of the Swiss Society of Orthopaedic Surgery and Traumatology (Schweizer Gesellschaft für Orthopädie und Traumatologie, SGOT) including fellows and registrars in the orthopaedic training program. Participants completed the survey questionary online via a dedicated website which collected and collated the responses. Translations into the three main languages (German, French and Italian) were available.
The first question of the survey was if the respondent performed foot and ankle surgery; a positive response allowed them to complete the remainder of the survey.
Three separate cases were presented in the survey. Expecting a higher response rate the X-rays illustrating the cases were accompanied with only brief information on patient history in order to minimize the time needed for the completion of the survey. In Figs.  1, 2, 3 the X-rays with corresponding texts (translated in English) as given in the survey are depicted.
Case 1 (Fig.  1) described a patient with a moderate hallux valgus deformity (hallux valgus angle 34°; intermetatarsal angle 11°) and a congruent joint without evidence of joint space narrowing.
Case 2 (Fig.  2) showed a patient with a severe hallux valgus deformity with significant lateral displacement of the sesamoids (hallux valgus angle 44°, intermetatarsal angle 17°) an incongruent joint and some narrowing of the joint space.
Case 3 (Fig.  3a/ b) illustrated a patient suffering of advanced degenerative osteoarthritis of the first metatarsophalangeal joint with significant dorsal osteophyte formation.
The questions to the cases asked the participant to state which surgical technique with what type of fixation they would choose and for cases 1–2 if an additional distal soft-tissue release would be performed. Answers were selected as multiple choice options including one for alternative solutions which the participant could state in detail (Table  1).
Table 1
Demographic Information
Survey recipients
654
Respondents
322/654 (=overall response rate 46 %)
 Board certified orthopaedic surgeons
322/322 (100 %)
 Trainees
0/322 (0 %)
 Performing Foot & Ankle Surgery
230/322 (71 %) = response rate 35 %)
 SFAS-Members a
90/322 (28 %)
Survey participants
230
Age groups (years of age)
 
 31–40
35/230 (15 %)
 41–50
91/230 (39 %)
 51–60
85/230 (38 %)
 61–70
18/230 (8 %)
Case load (forefoot cases per year)
 
 0–10
8/230 (4 %)
  < 25
58/230 (25 %)
 25–50
71/230 (31 %)
  > 50
93/230 (40 %)
Type of practice
 
 Public hospital
97/230 (43 %)
 Private practice
104/230 (45 %)
 University hospital
14/230 (6 %)
 Other institution
13/230 (6 %)
Orthopaedic Training
 
 Fellowship
52/230 (22 %)
Orthopaedic Training Area
 
 German part
190/230 (82 %)
 French part
24/230 (10 %)
 Italian part
0/230 (0 %)
 Mix German-French
12/230 (5 %)
 Mix German-Italian
2/230 (1 %)
 Mix french-Italian
2/230 (1 %)
Language/Region of Practice
 
 German-Speaking
183/230 (79 %)
 French-Speaking
38/230 (17 %)
 Italian-Speaking
5/230 (2 %)
 Other
4/230 (2 %)
aSFAS = Swiss Foot & Ankle Society; 2 % did not report on membership
In order to correlate the chosen treatments to demographic data the following data was collected from each participant of the survey: number of surgical cases on the foot and ankle treated per year; most commonly used language (German, French, Italian, English); principal Swiss region of medical training (primary German speaking-, French speaking-, Italian speaking region or combinations thereof); type of institution of practice (University hospital; public hospital; private practice or mix of private and public); age and membership in the SFAS (Swiss Foot and Ankle Society).
The responses were collated and then organised into an appropriate format for transfer to a statistical programme, SAS version 9.2 (SAS Institute Inc, Cary, NC, USA). Statistical analysis was performed to obtain percentages of all of the responses and chi squared tests were undertaken to investigate for significant statistical relationships between responses and demographic variables.
There was no need for an ethical approval as the survey did not concern direct patient data according to our institutional review board (directed by the Head of the Orthopaedic Department of the University Hopital Basel, Prof M. Jakob) and the local ethical committee (EKNZ). The study was completed by medical professionals. See questionnaire here (Additional file 1).

Results

The survey was mailed to 654 recipients according the list of members provided by the SGOT with an overall response rate of 46 % (322 responses). Seventy-one percent (230) of these stated to perform surgery on the foot and ankle, while 29 % did not (74).
So the response rate of the survey was actually 35 %. Demographic factors as well as participants case loads, type of training and practice are highlighted in Table  2. In summary all were board certified orthopaedic surgeons with forty percent of the respondents with a special interest in foot and ankle surgery and corresponding case loads.
Table 2
Results of the survey for procedure of choice for treatment in Case 1 (mild hallux valgus)
distal Chevron
95/230 (41 %)
Scarf
84/230 (36 %)
other
23/230 (10 %)
ReveL
9/230 (3.5 %)
prox Chevron
8/230 (3.5 %)
Lapidus (TMT-I fusion)
4/230 (2 %)
Ludloff
4/230 (2 %)
Keller’s procedure
2/230 (1 %)
Bunionectomy
1/230
For case 1 (moderate hallux valgus) distal Chevron was the most commonly chosen procedure (41 %). 78 % would perform a distal soft tissue (McBride) procedure in addition. Scarf osteotomy was the next most commonly chosen procedure (36 %). The correction was more likely to be accompanied by a McBride procedure 78 %) and was more likely to be preferred by members of SFAS (60 vs. 25 %, p <0.001). See details in Table  2.
In case two (severe hallux valgus) a Lapidus procedure was the most commonly preferred (31 %). It was more likely to be performed by members of the SFAS (53 vs. 26 %, p = 0.003) and by those who were less than 50 years old (47 vs. 12 %, p <0.001). 21 % preferred first metatarsophalangeal joint fusion with 80 % of those choosing a plate and screw construct for their fixation. See details in Table  3.
Table 3
Results of the survey for procedure of choice for treatment in Case 2 (severe hallux valgus)
Lapidus (TMT-I-fusion)
70/230 (31 %)
MTP-I-fusion
48/230 (21 %)
Scarf
38/230 (16 %)
Other
30/230 (13 %)
Ludloff
14/230 (6 %)
prox Chevron
13/230 (6 %)
distal Chevron
9/230 (4 %)
Keller’s procedure
6/230 (2 %)
none
2/230 (1 %)
Case 3 (first MTPJ arthritis), first MTPJ fusion was the treatment of choice for the majority of respondents (78 %) (Table  3) with 27 % preferring a plate and screw construct for fixation of the fusion and 60 % choosing screw fixation alone. Joint replacement arthroplasty was preferred by 2.2 % of respondents with a statistically significant percentage of them being in a practice which was 100 % private. Cheilectomy was chosen by 8 % and was more likely to be undertaken by those greater than 50 years old (12 vs. 1 %, p = 0.002). See details in Table  4.
Table 4
Results of the survey for procedure of choice for treatment in Case 3 (hallux rigidus)
MTP-I-fusion
177/230 (78 %)
Cheilectomy
20/230 (8 %)
Other
19/230 (8 %)
Joint replacement
5/230 (2 %)
Keller’s procedure
2/230 (1 %)
Interposition arthroplasty
2/230 (1 %)
none
1/230
The cultural background analysis did not show any differences regarding the choice of treatment in comparison with the language.
Further statistical analysis see Table  5.
Table 5
Statistical analysis by Pearson's Chi squared test
Comparison
p-value
Significant difference
Language vs Choice Case 1
p-value = 0.47
No
Language vs Choice Case 2
p-value = 0.28
No
Language vs Choice Case 3
p-value = 0.11
No
SFAS membership vs number of operations
p-value <0.001
Yes (SFAS members do operate more F&A cases than not members
SFAS membership vs Language background
p-value = 0.86
No differences
SFAS membership vs Choice Case 1
p-value = 0.89
No
SFAS membership vs Choice in Case 2
p-value < 0.001
Yes
SFAS membership vs Choice in Case 3
p-value = 0.014
Yes
Age and operations
p-value = 0.52
No differences in age and operations

Discussion

We were able to obtain a large number of respondents from our target population, which constituted a representative sample with an appropriate mix of fellows of the Swiss Orthopaedic Association. The large numbers of respondents and inclusion of orthopaedic surgeons who are not foot and ankle specialists provided results which gave us a good overview of the current treatment practices for forefoot deformity surgery in Switzerland.
A weakness of the study is the low survey respond rate of only 35 % of all registered orthopaedic surgeons. On the other hand 71 % of the respondents (230 surgeons in a country with about 8 Mio inhabitants) were performing foot and ankle surgery on a regular base.
In a recent survey of academic American orthopaedic foot and ankle surgeons in mild bunion cases 87 % preferring a distal metatarsal osteotomy, followed by a more proximal osteotomy and in 10 % augmented by an additional Akin osteotomy [ 22].
Compared to the in 2012 published survey of Australian orthopaedic surgeons we found less parallels in age and training as well as geographic/cultural differences as expected [ 9].
It was interesting to note that the classical east–west differences in cultural and language in Switzerland is not correlated with the type of treatment chosen in forefoot surgery. Nevertheless being a member of the SFAS did appear to be a significant factor in the choice of the type of correction preferred in the more severe cases with a larger proportion of SFAS members choosing a Lapidus for case 2 or a MTP-I-joint fusion in the hallux rigidus over other type of operations [ 9].
The scarf osteotomy has been described as a more involved and complex osteotomy than other types (ie distal chevron) and as such may be more commonly performed by the surgeon who more regularly performs, or has a more dedicated interest in foot and ankle surgery such as members of the SFAS. Many argue the merits of the scarf osteotomy are that it can provide significant degree of correction with less risk of metatarsal head avascular necrosis and better healing because of the biomechanical stability of the osteotomy [ 23].
In case 1 it was noted that a proximal Chevron and a scarf osteotomy was associated with a higher rate of distal soft tissue procedure than the distal type of osteotomy. Fifty percent of the foot and ankle surgeons (F + A) performed a scarf while 52 % of the general surgeons did so.
In case 2 with the severe bunion over 50 % of the F + A surgeons but only a third of the general orthopaedic surgeons would have chosen a scarf osteotomy in combination with distal soft tissue releases equal distribution of around 80 %. A Lapidus procedure was the preferred method to fix this condition in 32 % of all SGOT members while only 3 % of the F + A specialists did choose this here. The main difference was actually seen in the comparison of the french swiss to the German speeking swiss orthopaedic surgeons. It is clearly seen that the Lapidus procedure is more often used in the french part than in the German speeking.
Another demographic variable which we found to be associated with differing choices of treatments was the age of the surgeon. We grouped people into either older or younger than 50 years of age. In case 1, a Mitchell osteotomy was more likely to be performed by those older than fifty. In case 2, a Keller’s excision arthroplasty was more likely to be performed by those surgeons older than fifty whilst in case 3, a Cheilectomy alone was more likely to be performed by those greater than 50 years of age. These three findings were interesting as they may represent a change not only in the teaching and training of orthopaedic surgeons in Switzerland over the past years but possibly also a change in the concepts of aetiology and patho-physiology of hallux valgus as a condition.
Joint replacement arthroplasty was not a very common choice for the management of case 3 (hallux rigidus) in 2 % of the F + A surgeons and 5 % of the general orthopaedic surgeons, with most respondents preferring to perform a first MTPJ fusion.
With all of the available treatments described in the literature for hallux valgus it was interesting to note in our study that there were only a few procedures which were preferred by the majority of the swiss orthopaedic surgeons. Five procedures (Scarf, distal chevron, proximal chevron, 1st MTPJ fusion and 1st MTPJ replacement) accounted for the major percentage of preferred treatments for each of the three case examples [ 6, 8, 12, 13, 15, 18, 24].
The other interesting finding was the significant differences in the practise of general orthopaedic surgeons and F + A specialists. The F + A specialists tend to perform more modern surgeries such as the scarf osteotomy with additional distal soft tissue releases and usually don’t perform arthroplasties in the highly loaded first MTP joint.

Conclusion

There are significant associations between the surgeons’ age, expertise and training and their preferred operative intervention. Considerable differences were found in the practice of the general orthopaedic surgeons and the foot and ankle specialists. The cultural background and training is not demonstrating the expected classical Swiss east–west discrepancy. Despite the large number of surgical options available for hallux valgus, only a small number were preferred by the majority of surgeons. While we are all anecdotally aware that lesser deformity is treated with distal osteotomies and more severe deformity with a proximal osteotomy, we are aware of only limited data in the literature that verifies this. We could show differences in the swiss orthopaedic population in regard to the membership of the specialist’s society but the “Rösti-Graben” seems not to be as deep as mostly seen in the cultural and social correlation.

Acknowledgements

We would like to thank the Swiss Orthopaedic Society (SGOT aka swiss orthopaedics) for the support.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://​creativecommons.​org/​licenses/​by/​4.​0/​), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver ( http://​creativecommons.​org/​publicdomain/​zero/​1.​0/​) applies to the data made available in this article, unless otherwise stated.

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

LDI and GK equally contributed to the writing of the paper. LDI and GK carried out the background literature research. LDI drafted the manuscript. PDG and PS revised the paper. LDI, GK, NE made substantive intellectual contributions to the planning of the study. DI was responsible for the statistical analysis. All authors read and approved the final manuscript.
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