Session 8: Sportstrauma
Torsdag den 22. oktober
13:00 – 14:30
Lokale: Stockholm/Copenhagen
Chairmen: Morten Boesen / Kristoffer Barfod
85. Self-reported shoulder function, strength, range of motion and pain in patients with subacromial impingement: A direct comparison of patients being candidates versus patients not being candidates for subacromial decompression
Adam Witten, Mikkel Bek Clausen, Mikkel Attrup, Kristian Thorborg, Per Hölmich
Sports Orthopedic Research Center , Copenhagen, Department of Orthopedics, Copenhagen University Hospital, Amager & Hvidovre, Denmark; Metropolitan University College, Department of Physiotherapy and Occupational Therapy, Copenhagen, Denmark
Background: Subacromial impingement (SIS) is associated with
impairments in rotator cuff strength and range of
motion (ROM), low self-reported shoulder function
and pain. We hypothesized that patients being
candidates for subacromial decompression (SAD)
have more pronounced symptomatology and
impairments than non-candidates.
Purpose / Aim of Study: To compare rotator cuff muscle strength, ROM, self-
reported shoulder function and pain between
candidates and non-candidates for SAD.
Materials and Methods: Self-reported shoulder function (Q-DASH and
SPADI), maximum isometric muscle strength in
shoulder abduction (AB-strength) and external
rotation (ER-strength), active abduction ROM (AB-
ROM) and passive internal rotation ROM (IR-ROM)
were measured. Pain during each test and pain
during the last week was reported on the Numeric
Pain Rating Scale (NRS 0-10). Patients were
categorized as candidates or non-candidates for
SAD based on the first consultation by an orthopedic
specialist, blinded to test results.
Findings / Results: From 156 SIS-patients, 25 were candidates for SAD,
while 131 were not. SAD-candidates had significantly
lower AB-ROM (87° vs 112°, p=0,011) and IR-ROM
(114° vs 123°, p=0,026) additional to higher pain
during test of AB-strength (5.3 vs 3.7, p=0.02). No
differences were found between candidates and non-
candidates in self-reported shoulder function, AB-
strength, ER-strength, pain during test of ER-
strength and pain during last week. No differences in
age, gender, weight and duration of symptoms
between the groups were found.
Conclusions: ROM impairments and pain during AB-strength
testing is associated with being considered a
candidate for SAD, while self-reported function, pain
last week and actual rotator cuff strength is not. As
differences seems minor, the relation between
impairments and the choice of treatment needs
further clarification.
86. Clinical outcomes after revision surgery for medial patellofemoral ligament reconstruction: A 1-year analysis of 23 patients
Andreas Chatterton, Ole Gade Sørensen, Torsten Nielsen, Martin Lind
Sportstraumatology, University of Århus
Background: Medial patellofemoral ligament
reconstruction (MPFL-R) has in the
last decade become the standard
surgical treatment for patella instability.
Limited knowledge exist concerning
causes for failure of MPFL-R and
outcome after revision MPFL-R.
Purpose / Aim of Study: To evaluate causes for MPFL-R failure
and clinical outcome after revision
MPFL-R.
Materials and Methods: Twentythree patients with failed
MPFL-R underwent either isolated
revision MPFL-R or combined with
tibial tuberosity osteotomy. There
were 6 males and 17 females. Mean
age was 23 (SD±8.6).
Prior to surgery dysplasia of the patello-
femoral joint, cartilage lesions, tibial
tubercle-trochlea groove distance
(TTTG) and tunnel placement were
evaluated with MRI. Subjective
outcome evaluation, visual analog
scale (VAS) pain score and Kujala
Score were performed prior to surgery
and at 1 year post-operatively.
Radiographic charateristics and clinical
outcome was compared with a 240
patient cohort of primary MFPL-R.
Findings / Results: Non-anatomical fixation of the graft at
the medial femoral condyle after
primary MPFL-R was seen in 52 %
(12) of patients with anterior/proximal
malplacement in most cases. Severe
trochlea dysplasia Dejour Type C+D
was seen in 36 % of patients
compared to 30 % in primary MPFL
patients (NS) Mean Kujala score at 1
year follow up was 60 compared to 80
in primary MPFL patients (P<0.01).
Mean VAS pain score at rest was 3.0
compared to 1.7 in primary MPFL
patients (P<0.01).
Conclusions: Non-anatomical graft position appears
to be an important cause for MPFL-R
failure. Subjective outcome after
revision MPFL-R is poorer than after
primary MPFL-R.
87. Outcome after arthroscopic labral surgery in patients treated with periacetabular osteotomy. A follow-up study of 45 patients.
Charlotte Hartig-Andreasen, Bent Lund, Grønbeck Nielsen Torsten , Kjeld Søballe, Martin Lind
Orthopedic Surgery, Aarhus University Hospital; Division of Sports Trauma, Orthopedic Department , Aarhus University Hospital
Background: Hip arthroscopy (HA) in the treatment of
patients with persisting hip symptoms after
periacetabular osteotomy (PAO) remains
unclear.
Purpose / Aim of Study: The aim of this study is; 1) to identify factors
predicting failure after HA with previous
PAO defined as a conversion to total hip
replacement (THR) and 2) to evaluate the
patient reported outcome measurement
scores after HA in patients with previous
PAO.
Materials and Methods: Of the 55 hips treated with HA after PAO
from Aug 2008 to 2012 at University
Hospital of Aarhus, 45 hips were included in
the study (median age: 34.1 yrs, range
13.2-61.4 yrs). Indications for HA were a
positive FABER and impingement test and
signs of labral damage on MR-arthrography
when available. PROM questionnaires
(mHHS, HOS) were completed by 37 (82.2
%) patients.
Findings / Results: Defining THR as an end point the
Kaplan-Meier analysis showed a hip joint
survival rate of 53.2% (95% CI,
0.1%-0.8%) at 6.5 years after HA. Using
Cox regression analysis the following
statistically significant predictors of
conversion to THR were identified: joint
space width after PAO < 3.0 mm and a
Tönnis grade of >2. Twelve hips (27%)
needed revision HA. Labral damage was
present in 84.4% of the hips. In 42.2% of
the hips an ICRS grade 3 or 4 changes
were found in the acetabulum. Median
mHHS and HOS scores were 63.8 and
67.1 respectively. At follow-up a NRS
pain score of >3 in rest and during
activity were present in 43% and 64% of
the pt..
Conclusions: Patients with symptomatic hips after
PAO may benefit from HA, but half of the
joints underwent total hip replacement at
short-term follow-up. Signs of joint
degeneration after PAO are important
risk factors and to be considered when
offering patients arthroscopy. Pt. cannot
expect to be pain free. Further studies
are needed to clarify what role HA
should play in this patient group.
88. Arthroscopic treatment of degenerative meniscal tears: importance of age and osteoarthritis
Jens Jørgsholm, Claus Hjorth Jensen, Anders Odgaard
Dept. of Orthopaedics, Copenhagen University Hospital Gentofte
Background: Arthroscopic partial meniscectomy is one
of the most commonly performed
orthopedic procedures; still the
indication for treatment and evidence is
controversial.
Purpose / Aim of Study: This data-based study was conduced to
determine the outcome of arthroscopic
partial meniscectomy. The aim was to
determine whether age and knee
osteoarthritis are predictive factors
for the outcome of arthroscopic partial
meniscectomy.
Materials and Methods: Prospectively collected data was
retrieved from a local hospital
register. The data included knee
arthroscopic procedures and pre- and
postoperative PROMs from June 2013 to
May 2015. Patients were divided into two
age groups: ≥60 years and ≤40 years.
Preoperative X-rays were examined for
all patients ≥ 60 years (n = 59) to
determine the level of osteoarthritis
using the classification of Kellgren and
Lawrence (K&L). They were then divided
into different groups according to the
degree of osteoarthritis. The primary
outcome was measured in the difference
in Oxford Knee Score (OKS) and patient
satisfaction at 3 months.
Findings / Results: At 3 months, OKS was significantly
improved for both age groups, 6,6 (95%
CI 4,44 to 8,69) for patients ≥60 years
(n=72) and 7,4 (95% CI 4,43 to10,65) for
patients ≤40 years (n=48). The patient
satisfaction was 66% for patients ≥60
years (n = 79) and 73% for patients ≤40
years (n = 78). There was no significant
difference between the age groups in OKS
and patient satisfaction. Patients with
no osteoarthritis (K&L 0) had
significantly better outcome than
patients with severe osteoarthritis (K&L
3), (p = 0,044).
Conclusions: According to the outcome scores there
was a significant postoperative
improvement in both age groups. The
study failed to demonstrate a
significant difference between the age
groups. Preoperative osteoarthritic
changes correlated negatively with
patient satisfaction.
89. Minimal Important Change for the Knee injury and Osteoarthritis Outcome Score in patients undergoing anterior cruciate ligament reconstruction
Lina Holm Ingelsrud, Caroline Terwee, Lars-Petter Granan, Lars Engebretsen, Ewa Roos
Clinical Orthopaedic Research Hvidovre, Department of Orthopaedics, Copenhagen University Hospital Hvidovre; Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam; Department of Physical Medicine and Rehabilitation, Department of Pain Management and Research, Divi, Oslo University Hospital; Department of Orthopaedic Surgery, Oslo University Hospital and Faculty of medicine, Oslo; Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark
Background: Important change in the Knee injury and
Osteoarthritis Outcome Score (KOOS) in
patients undergoing anterior cruciate
ligament reconstruction (ACLR) is
unknown.
Purpose / Aim of Study: To determine Minimal Important Change
(MIC) for the KOOS in patients undergoing
ACLR.
Materials and Methods: 1197 patients undergoing unilateral primary
ACLR were extracted from the Norwegian
Knee Ligament Register: 397 at 6 months,
400 at 12 months and 400 at 24 months
postoperatively. KOOS was completed
postoperatively accompanied by anchor
questions with 7-point scales ranging from
“better, an important improvement” to
“worse, an important worsening”.
Preoperative KOOS scores were extracted
from the register. Two anchor-based MIC
approaches were used: 1) Receiver
operating curve (ROC) by using the point
of least misclassification between the
improved and unchanged groups, and 2)
the mean change in KOOS score for
patients being “somewhat better, enough to
be importantly improved”.
Findings / Results: 71% (n=357) and 74% (n=385) reported an
important improvement in sport and
recreational activities (Sport/Rec) and
quality of life (QOL), respectively.
Correlations between anchor question and
KOOS subscales were above 0.4 at all
time-points for Sport/Rec and QOL, except
Sport/Rec at 24 months (0.37). For all
other subscales correlations were below
0.39, besides Symptoms at 12 months
(0.49). ROC and Mean Change MIC values
for Sport/Rec were at 6 months: 22.5 and
17.4, 12 months: 2.5 and 23.7 and 24
months: 10 and 24.3. MIC values for QOL
were at 6 months: 21.9 and 29.7, 12
months: 15.6 and 24.3 and 24 months: 21.9
and 29.3.
Conclusions: MIC values varied based on methodology,
subscale and time to follow-up. Our
findings emphasize that MIC values must
be interpreted with caution and that one
MIC value cannot be applied across
different contexts.
90. Translation, cross-cultural adaptation, reliability and discriminative validity of the Danish version of the short questionnaire to assess health-enhancing physical activity (SQUASH)
Lotte Sørensen, Lone Ramer Mikkelsen, Julie Sandell Jacobsen, Inger Mechlenburg
Department of Orthopaedic Surgery, Aarhus University Hospital, Denmark ; Elective Surgery Centre, Silkeborg Regional Hospital, Denmark; Department of Physiotherapy and Occupational Therapy, Aarhus University Hospital, Denmark
Background: There is abundant evidence that physical
activity has a fundamental role in the
prevention and treatment of chronic disease.
Questionnaires are simple and inexpensive to
apply to measure physical activity.
Purpose / Aim of Study: Translate and cross-cultural adapt the short
questionnaire to assess health-enhancing
physical activity (SQUASH) to Danish and to
investigate the reliability and discriminative
validity of the Danish version.
Materials and Methods: The study was conducted according to the
COSMIN guidelines. The reliability was
evaluated in 50 healthy individuals, mean
age 47.2 ± 12.6 years and mean period
37.1 ± 14.9 days between test and retest.
The relative reliability was assessed with
intraclass correlation coefficient (ICC) and
the absolute reliability with standard error of
measurement (SEM) and smallest
detectable change (SDC). The
discriminative validity was evaluated in 22
patients with hip dysplasia, mean age 34.8
± 7.9 years, who were compared with 26
healthy individuals matched on age.
Findings / Results: For the total activity score ICC was 0.71 (95%
CI: 0.54; 0.82), SEM was 2351 MET x min/week
(25% of the grand mean) and the SDC was
6517 MET x min/week (70% of the grand
mean). There was no significant difference
between healthy adults and patients with hip
dysplasia in total activity score but a significant
difference in time spent on activities of high
intensity.
Conclusions: Relative raliability was acceptable and
indicates that the Danish version of
SQUASH can distinguish between
individuals, but the absolute reliability was
poor and SQUASH is not considered
suitable for measuring physical activity on
an individual level. SQUASH was unable to
discriminate between healthy individuals
and patients with hip dysplasia with respect
to total activity score, but was able to
discriminate on time spent on activities of
high intensity.
91. Incidence and outcome after PCL reconstruction. Results from the danish registry for knee ligament reconstructions
Martin Lind, Lene Rahr-Wagner, Kristian Behrndtz
Orthopedics, Aarhus Univerisity Hospital
Background: Outcome after posterior cruciate ligament
(PCL) reconstruction is poorly described in
the literature due to rare incidence. The
Danish ACL Registry has since 2005
monitored development and outcome of
PCL reconstruction.
Purpose / Aim of Study: This study presents the epidemiology and
outcome after PCL reconstructions in
Denmark.
Materials and Methods: A total of 585 PCL reconstructions out of a
total of 23.253 knee liagment
reconstructions was registered in the ACL
Registry in the period 2005-2014. Type of
reconstruction isolated or multiligament as
well as cause of injury and concomitant
meniscus and cartilage injuries were
extracted. Outcome at one year follow-up
was reported by KOOS score and Tegner
function score. Outcome data was
compared with data from primary ACL
reconstructions.
Findings / Results: Isolated PCL reconstruction was performed
in 32 % of cases. Meniscus lesions and
cartilage lesions was seen in 17 and 13 %
of cases respectively. The main causes for
PCL injury was sports 39 %, and traffic 34
%. The KOOS scores at 1 year follow-up for
isolated PCL reconstruction was 71 for
symptoms, 77 for pain, 83 for ADL, 49 for
Sports and 53 for QoL. For multiligament
PCL reconstruction scores were 69 for
symptoms, 78 for pain, 83 for ADL, 46 for
Sports and 51 for QoL. Tegner function
score for isolated and multiligament PCL
reconstruction was 4.3 and 3.9 respectively.
PCL reconstructions overall had poorer
subjective outcome than ACL
reconstructions.
Conclusions: PCL reconstructions represent only 2.5 % of
all knee ligament reconstructions in
Denmark. Sports and traffic is the main
causes for injury. Meniscus and cartilage
injuries are seen frequently with PCL injury.
PCL reconstructions had poorer outcome
than ACL reconstructions. There was no
difference in subjective outcome between
isolated and multiligament PCL
reconstructions.
92. The injured exerciser - in risk of depression?
Mia B. Lichtenstein, Uffe Jørgensen
Institute of Psychology, University of Southern Denmark; Orthopedic Department, Odense University Hospital
Background: Regular exercise is effective in health
promotion and disease prevention. It has
favorable effects on both physical and
mental well-being. But injuries can lead to
periods with reduced exercise levels. How
do these periods affect the exercisers'
emotional condition?
Purpose / Aim of Study: The aim of this study was to measure
emotional responses (depression and
stress) associated with severe
musculoskeletal injury in regular exercisers.
We also wanted to identify risk factors to be
able to detect the depression and stress
prone patient.
Materials and Methods: We conducted a cross-sectional study on a
orthopedic department at a local hospital. A
total of 694 consecutive patients with
musculoskeletal injuries at foot, knee or
shoulder completed a questionnaire. It
consisted of questions related to injury and
exercise habits. Further we estimated
depressive symptoms with the Major
Depression Inventory (MDI), clinical stress
with the Perceived Stress Scale (PSS) and
quality of life with the EQ-5D.
Findings / Results: We found that 18.7% participants with
symptoms of depression. Among those with
depression we found that 99 participants to
some extent had experienced that life was
not worth living. The stress-test showed that
39.1% had symptoms of mild stress while
29.9% reported clinical stress. The
participants with severe symptoms of
depression or stress were significantly
younger, had more days absent from work
due to injury and had decreased quality of
life.
Conclusions: Exercisers with injuries in the
musculoskeletal system seem to
experience symptoms of depression and
stress which is associated with reduced
quality of life.
The MDI and the PSS are useful in the
detection of depression and stress.
Psychological treatment seems to be an
important supplement to the medical
interventions. This could prevent severe
and expensive depression courses.
93. Distribution of muscle fibres with centralized nuclei close to the myotendinous junction in humans
Niels Jakobsen, Abigail Mackey, Jens Jakobsen, Michael Krogsgaard
Department of sportstraumatology M51, Bispebjerg Hospital; Institute for sportsmedicine, M51, Bispebjerg Hospital
Background: Strain injuries often occur at the myotendinous
junction (MTJ) and yet little is known about the
constant state of remodelling of fibres close to the
MTJ. During muscle fibre remodelling, nuclei can be
observed centrally in contrast to the normal
peripherally located nuclei. Heavy resistance
exercise (HRE) significantly reduces the risk of
strain injuries in the hamstrings but no studies have
analysed human MTJ material to investigate this.
Purpose / Aim of Study: To investigate if muscle fibres close to the MTJ
contain more central nuclei than further away from
the MTJ and to see if HRE affects this pattern.
Materials and Methods: 9 patients scheduled for ACL reconstruction with
hamstring grafts were randomized into a control or
HRE group (5 HRE, 4 control). The MTJ samples
from semitendinosus and gracilis were embedded in
TissueTech and frozen in liquid Nitrogen, cut on a
cryostat and stained immunohistochemically for
nuclei and collagen type 12 and 22. Muscle fibres
were divided into 3 groups depending on their
distance to MTJ: [0 µm], [1-200 µm] and [201-400
µm]. We measured the percentage of muscle fibres
with central nuclei in each group and calculated the
median and range
Findings / Results: In the HRE group, adjacent to MTJ [0 µm], the
median of fibres with central nuclei was 46% (range:
11 – 88). [1 – 200 µm] from MTJ, 22% (0 – 22). [201
- 400 µm], 7% (2 – 25).
In the control group, adjacent to MTJ [0 µm], the
median was 31% (25 – 61). [1 – 200 µm], 26% (11 –
33). [201 – 400 µm], 13% (7 – 17).
Conclusions: It appears that a higher proportion of the fibres
closest to the MTJ have centrally located nuclei. A
similar analysis is being performed with collagen 22
as a specific marker for MTJ to confirm these
findings and allow statistical comparisons between
control and HRE groups
94. Large improvements in patient-reported outcome occur after hip arthroscopy within the first year – but HAGOS finds continued markedly reductions in patient’s ability to perform desired physical activity and in their quality of life.
Otto Kraemer, Anne-Dorthe Madsen, Per Hölmich, Kristian Thorborg
Orthopedic dept., Arthroscopic Center Amager, Sports Orthopedic Research Centre - Copenhagen (SOR-C), Amager and Hvidovre Hospital
Background: Improvements in modified Harris Hip
Score (mHHS) following hip
arthroscopy are well-known, with no
additional improvements within one
year. One-year results from the
Copenhagen Hip And Groin Outcome
Score (HAGOS) in patients undergoing
hip arthroscopy are still unknown.
Purpose / Aim of Study: To evaluate and compare outcomes at
3, 6 and 12 months following hip
arthroscopy for cam impingement
and/or labral injury using mHHS and
HAGOS.
Materials and Methods: From October 2011 to February 2014,
108 consecutive patients, 63 females,
mean age 39(11) and 45 males, mean
age 38(11), underwent hip
arthroscopy . Standardised post-
operative rehabilitation instructions
were provided. Outcomes were
evaluated using mHHS and HAGOS
preoperatively and at 3, 6, and 12
months.
Findings / Results: Preoperative mHHS status, mean(SD),
was: 62(14) and corresponding
HAGOS status, mean(SD) was: Pain:54
(19); Symptoms:48(17); ADL:57(23);
Sport:37(20); PA:20(23); QOL:26(16).
Large improvements were seen at 3
months for all scales (p<0.001), except
HAGOS, PA-subscale. Significant
improvements between 3 and 6
months, and from 3 to 12 months,
were only seen for HAGOS subscales
Sport and PA, (p<0.05), with no
improvement from 6-12 months.
Status, mean(SD) at 12 months was:
mHHS: 83 (17) and corresponding
HAGOS status was: Pain:80(18);
Symptoms:73(18); ADL:94(8); Sport:70
(25); PA:56(38); QOL:61(28).
Conclusions: Large improvements in mHHS and
HAGOS subscale scores were seen at
3 months for all scales following hip
arthroscopy, however, further
improvements from 3 to 6 months, and
from 3 to 12 months, were only seen in
HAGOS subscales Sport and PA.
Specific subscales of the HAGOS (PA
and QOL) suggests that the ability to
participate in desired physical activities
and quality of life is still markedly
reduced in patient undergoing hip
arthroscopy at 1-year follow-up.
95. Muscle strength symmetry of the hip flexors and extensors in patients with femoroacetabular impingement included in the HAFAI-cohort – preliminary data
Signe Kierkegaard, Ulrik Dalgas, Bent Lund, Kjeld Søballe, Inger Mechlenburg
Department of Orthopaedic Surgery, Horsens Hospital; Section of Sport Science, Department of Public Health, Aarhus University
Background: Isometric muscle strength of hip extensors and
flexors is reduced in the primary affected leg of
patients with femoroacetabular impingement (FAI)
compared to matched healthy controls. Muscle
strength asymmetry between legs has been related
to decreased physical performance. Hence, it is
relevant to investigate if muscle strength differences
exist between the primary affected leg and the
contralateral leg in patients with FAI.
Purpose / Aim of Study: To compare maximally muscle strength of the hips in
patients with FAI. We hypothesised, that muscle
strength of the primary affected leg would be lower
than in the contralateral leg.
Materials and Methods: Sixteen patients scheduled for hip arthroscopic
surgery for FAI were included. Maximum voluntary
contraction (MVC) of the hip flexors and extensors
were tested for both legs in a randomised order.
Patients completed two submaximal familiarisation
trials followed by 3-4 MVC trials performed
isometrically at 45 degrees and isokinetically at 60
degrees/second. Pain levels were registered during
testing, using a 100 mm Visual Analog Scale.
Findings / Results: The primary affected leg was significantly weaker
than the contralateral leg for all MVC tests.
Concentric, isometric and eccentric hip flexion
strength of the primary affected leg was respectively
median (interquartile range) 12(2-31) %, 7(5-17)%
and 17(11-23)% lower than of the contralateral leg
while a deficit of 11(1-29)%, 10(3-20)% and 10(2-
23)% was observed for hip extension. Median
(range) pain during test, affected leg: flexion 25(0-
82) mm, extension 15(0-75) mm, contralateral leg:
flexion 0 (0-59) mm and extension 0 (0-50) mm.
Conclusions: In patients with FAI hip extensor and flexor muscle
strength of the primary affected leg is significantly
lower than in the contralateral leg which could be
affected by difference in pain levels.
96. 2 year FU after hip arthroscopy with labral repair in children and adolescents
Søren Winge, Christian Dippmann, Kristian Thorborg, Otto Kraemer, Per Hølmich
Orthopaedic Department, Copenhagen Private Hospital; Section for Sports Traumatology M51, Department of Orthopedic Surgery, Bispebjerg Hospital; Arthroscopic Center Amager, Copenhagen University Hospital
Background: Femoroacetabular impingement (FAI) is
also being recognized in children and
adolescent as a cause of hip pain. Hip
arthroscopy in children and adolescents is
technically demanding and although widely
accepted as treatment of FAI in adults little
is know about the results in this age group.
Purpose / Aim of Study: The purpose of this study was to investigate
the self-reported outcome of Hip
arthroscopy with labral repair in children and
adolescents 2 years after surgery.
Materials and Methods: From November 2010 to February 2013 16
consecutive patients (mean age 16,2
years) 6M and 10F, underwent hip
arthroscopy with labral repair at
Copenhagen Private Hospital. Modified
Harris Hip Score (mHHS) and a Visual
Analogue Score (VAS) for pain were used
as outcome measures. All patients
completed both measures pre-op. and 2
years post-op. Data were collected
prospectively and analyzed using non –
parametric statistics.
Findings / Results: Significant statistical improvements were
seen for both outcome measures (p <
0,001) at 24 months. The VAS pain score
improved from mean 53 (37-80) to mean 11
after 24 months (0-55). MHHS increased
from mean 57 (37-71) to mean 97 (73-100)
at 2 years. The 2 worst patients had the 2
lowest CE angles (22 dg and 26 dg). These
2 patients increased mean 44 point in
mHHS from 37 to 81 and decreased mean
21 point in VAS score from 79 to 58.
Conclusions: Hip arthroscopy in children and adolescents
provide promising results equal to those
achieved for active, non-arthritic adults. Two
years after surgery we found clinically
relevant improvements. CE angle close to
or within the dysplasia grey zone (20-25
degrees) might lead to less optimal results.
Overall the results are promising, but further
investigation, including long-term results are
needed.