
Erik HohmannUniversity of Queensland | UQ · School of Medicine
Erik Hohmann
MBBS, FRCS, FRCS (Tr&Orth), MD, PhD
About
151
Publications
38,023
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
3,312
Citations
Introduction
Additional affiliations
June 2003 - present
March 2003 - present
March 2002 - present
Publications
Publications (151)
Purpose
Posterior tibial slope (PTS) influences knee kinetics and kinematics. The purpose of this study was to investigate morphology and variation within a sample of the black and white male and female population.
Method
480 randomly selected lateral knee radiographs were included. The anterior tibial cortex angle (ATC), proximal anatomical tibia...
Background
Microfragmented adipose tissue has been proposed for intra-articular treatment of knee osteoarthritis. There are little data comparing the outcomes of treatment between microfragmented adipose tissue and other biological treatments.
Purpose
To perform a systematic review and meta-analysis comparing microfragmented aspirated fat injectio...
Purpose
To investigate the safety and accessibility of direct posterior medial and lateral portals into the knee.
Methods
This study was a controlled laboratory study that comprised a sample of 95 formalin-embalmed cadaveric knees and 9 fresh-frozen knees. Cannulas were inserted into the knees, 16 mm from the vertical plane between the medial epic...
This study aimed to describe the morphology of the coracoid process and determine the frequency of commonly observed patterns. The second purpose was to determine the location of inferior tunnel exit with superior based tunnel drilling and the superior tunnel exit with inferior based tunnel drilling.
A sample of 100 dry scapulae for the morphology...
The posterior compartments of the knee are currently accessed arthroscopically through anterior, posteromedial or posterolateral portals. A direct posterior portal to access the posterior compartments has been overlooked due to a perceived high-risk of injury to the popliteal neurovascular structures. Therefore, this study aimed to investigate the...
Knee arthroscopy is typically approached from the anterior, posteromedial and posterolateral portals. Access to the posterior compartments through these portals can cause iatrogenic cartilage damage and create difficulties in viewing the structures of the posterior compartments. The purpose of this study was to assess the feasibility of needle arth...
The purpose of this study was to develop a quality appraisal tool for the assessment of laboratory basic science biomechanical studies.
Materials andScore development comprised of the following phases: item identification/development, item reduction, content/face/criterion validity, weighting, test-retest reliability and internal consistency. For i...
Purpose:
The purpose of this study was to perform a Delphi consensus for return to sports (RTS) following sports related concussion (SRC).
Methods:
Open-ended questions in rounds 1 and 2 were answered. The results of the first two rounds were used to develop a Likert style questionnaire for round 3. If agreement at round 3 was <80% for an item,...
Background:
The purpose of this study was to perform a systematic review and meta-analysis of studies comparing local injections of either platelet-rich plasma (PRP) or corticosteroid for the treatment of lateral elbow epicondylitis.
Methods:
A systematic review of Medline, Embase, Scopus, and Google Scholar was performed, and all level 1 and 2...
Purpose:
To determine the location of coracoid inferior tunnel exit with superior-based tunnel drilling and coracoid superior tunnel exit with inferior-based tunnel drilling.
Methods:
Fifty-two cadaveric embalmed shoulders (mean age 79 years, range 58-96 years) were used. A transcoracoid tunnel was drilled at the center of the base. Twenty-six s...
INTRODUCTION: The purpose of this study was to report the temporary loss of medical license and pilot incapacitations in the United Arab Emirates from 2018-2021.METHOD: The General Civil Aviation Authority database was searched for all reported temporary suspensions of license between 2018-2021 and the ICD-10 codes were extracted.RESULTS: A total o...
Introduction
The purpose of this study was to perform a systematic review and meta-analysis of both randomized controlled and observational studies comparing double-button suture fixation to hook plate fixation for types III–IV acromioclavicular joint dislocation.
Methods
Systematic review of Medline, Embase, Scopus, and Google Scholar, including...
Background:
The purpose of this study was to perform a systematic review and meta-analysis of both randomized controlled and observational studies comparing conservative to surgical treatment of displaced proximal humerus fractures.
Methods:
Systematic review of Medline, Embase, Scopus, and Google Scholar, including all level 1-3 studies from 20...
Background:
Surgical reconstruction of ACL injuries is a common strategy but superiority over conservative treatment has not been established. The aim was to perform a systematic review and meta-analysis comparing outcomes between operative and non-operative treatment of ACL injuries.
Methods:
Systematic review of Medline, Embase, Scopus, and Go...
IntroductionThe purpose of this study was to perform a systematic review and meta-analysis of both randomized controlled and observational studies comparing surgical interventions for proximal humerus fractures.Methods
Systematic review of Medline, Embase, Scopus, and Google Scholar, including all level 1–3 studies from 2000 to 2022 comparing surgi...
INTRODUCTION: The purpose of this study was to assess test-retest reliability of the Pieterse return to flight duty protocol for cabin crew to return to flight duties. METHOD: Flight attendants between 20–50 yr old were included if they underwent rehabilitation at the musculoskeletal rehabilitation unit for a musculoskeletal injury, surgical treatm...
Purpose
The purpose of this study was to report the results of subacromial arthroscopic decompression (SAD) without removal of the calcific deposits in patients with calcifying tendinitis.
Methods
All patients between 2016 and 2019 were included if they were aged between 18 and 60 years and had an isolated calcific deposit. The Constant–Murley sco...
Introduction
The purpose of this study was to determine the effect of biceps tendon tenotomy on the load of the supraspinatus tendon/muscle complex during abduction of the arm from 0⁰-15⁰.
Methods
Eleven fresh frozen human cadaver shoulders (6 males, 5 females, age ranged 44-88 years, mean upper extremity weight 2.96 +0.56 kg) were included. The s...
Purpose
The purpose of this study was to perform a Delphi consensus for the treatment of patients with shoulder impingement with intact rotator cuff tendons, comparing North American to European shoulder surgeon preferences.
Methods
Nineteen surgeons from North America [NAP] and 18 surgeons from Europe [EP] agreed to participate and answered 10 op...
Disruptive innovation completely changes the traditional way that we operate and may only be realized in retrospect. For example, shoulder superior capsule reconstruction (SCR) is a complete change from the traditional methods of treating massive, irreparable rotator cuff tears and pseudoparalysis. Classic examples of disruptions in orthopaedic sur...
Purpose
The purpose of this systematic review was to investigate variability in biomechanical testing protocols for laboratory-based studies using suture anchors for glenohumeral shoulder instability and SLAP lesion repair.
Methods
A systematic reviewing of Medline, Embase, Scopus and Google Scholar using Covidence software was performed for all b...
Purpose
Minimally invasive surgery in the posterior knee is high risk for iatrogenic injury to popliteal neurovascular neurovasculature structures. This study aimed to use reliable landmarks to define safe zones for arthroscopic portal placement into the posterior knee.
Methods
Distances were measured between bony landmarks and neurovascular struc...
Background
Higher posterior tibial slope (PTS) is a risk factor for anterior cruciate ligament (ACL) injury in men and women. The individual contribution of the lateral (LPTS) and medial (MPTS) slope has not yet been investigated.
Purpose
To determine whether either the LPTS or the MPTS is an independent risk factor for ACL injury, and to determin...
Purpose:
The purpose of this study was to quantify the posterior horn meniscal slope and determine its contribution to the reduction in posterior tibial slope.
Methods:
Patients aged between 16 and 60 years and had intact menisci with no evidence of previous injury or surgery were included. Patients with radiological evidence of osteoarthritis G...
Purpose
The purpose of this study was to measure slope of both the medial and lateral posterior horn of the meniscus, and its contribution to the overall resulting posterior tibial slope (bone and meniscus combined slope) in ACL-intact (ACLI) and ACL-deficient (ACLD) knees.
Methods
MR images of patients with intact menisci aged between 16-60 years...
PURPOSE
To perform a systematic review that determines the percentage of published Orthopedic Surgery and Sports Medicine systematic reviews and meta-analyses that have a conclusive conclusion.
METHODS
A systematic review was performed using PRISMA guidelines. Six high-quality orthopedics journals were chosen for analysis over a ten-year eligibili...
Aim and objective:
The purpose of this study was to compare clinical results following complex proximal, midshaft, and distal tibial fractures and investigate whether there are differences in outcomes between these locations.
Materials and methods:
Patients between 18 years and 65 years of age and minimum follow-up of 12 months with complex tibi...
Purpose
The common peroneal nerve (CPN) can be injured during fibular-based posterolateral reconstructions due to its close relationship to the neck of the fibula. Therefore, the purpose of this study was to observe the course of the CPN and its branches around the fibular head and neck and quantify the position in relation to relevant bony landmar...
Surgical access to the posterior knee poses a high-risk for neurovascular damage. The study aimed to define the popliteal fossa by reliable bony landmarks and comprehensively mapping the neurovascular structures for application in posterior knee surgery. Forty-five (20 male, 25 female) embalmed adult cadaveric knees were included. The position of t...
Purpose
To summarize the best available evidence with regards to timing of staged bone grafting for infected tibial non-union, and to extract evidence-based criteria indicating when bone grafting can be safely performed.
Methods
Medline, Embase, Scopus, and Google Scholar were searched, and publications of evidence Level I-IV from 2000 to 2020 wer...
The classic concept of translational research can be described as a bench-to-bedside approach. Reverse translational research, bedside-to-benchtop, also may have a place. Under some circumstances, innovative clinicians may develop new techniques in advance of basic science research. A recent example of the success of reverse translational research...
Background
Plantar fasciitis is a common cause of heel pain. Corticosteroid injections are commonly used and proven to be effective, and lately platelet-rich plasma (PRP) has been used with mixed results.
Purpose
To perform a systematic review and meta-analysis comparing intralesional injections of PRP and steroid infiltration.
Study Design
Syste...
Introduction
The purpose of this study was to perform a systematic review and meta-analysis comparing intra-articular knee injection of PRP and hyaluronic acid and investigate clinical outcomes and pain at both 6 and 12 months.
Methods
A systematic review of Medline, Embase, Scopus, and Google Scholar was performed in the English and German litera...
Objectives:
To develop a post-traumatic bone defect classification scheme, and complete a preliminary assessment of its reliability.
Design:
Retrospective classification.
Setting:
Tertiary referral trauma center.
Patients/participants:
20 open fractures with bone loss.
Intervention:
Assignment of a bone defect classification grade.
Main o...
Airline pilots can learn how to fly without ever leaving the ground, and pilots are required to pass proficiency checks using simulator-based tools to ensure they are competent, and remain competent, to fly specific types of planes under specific circumstances. In contrast, generally, surgical training is based on an apprenticeship model, and surgi...
Purpose
To determine whether femoral epicondylar width (FECW) obtained from either magnetic resonance imaging (MRI) or plain radiographs could be used to predict anterior cruciate ligament (ACL) length. A secondary purpose was to develop a formula to use maximum FECW on either MRI or plain radiographs to estimate ACL length preoperatively.
Methods...
Since the introduction of acromioplasty by Neer in 1971 and arthroscopic subacromial decompression (SAD) by Ellman in 1987, the outcomes have been reported to be consistently good. Recently it was suggested that supervised physical therapy is comparable with SAD, which was contested by other studies claiming that SAD is clearly superior to nonopera...
Purpose:
The purpose of this study was to perform an evidence-based, expert consensus survey using the Delphi panel methodology to develop recommendations for the treatment of degenerative meniscus tears.
Methods:
Twenty panel members were asked to respond to 10 open-ended questions in rounds 1 and 2. The results of the first 2 rounds served to...
Aim:
The purpose of this study was to compare the functional and radiological outcomes of complex tibia fractures treated with two different hexapod fixators.
Material and methods:
This is a retrospective comparative study of patients treated for complex tibial fractures between 2010 and 2015. Inclusion criteria was patients between 18 years and...
Background:
The purpose of this study was to investigate the blood supply of the humeral head (HH) originating from the anterior (ACHA) and posterior circumflex humeral arteries (PCHA).
Methods:
Formalin preserved specimens were used to measure ACHA length, ACHA length in the bicipital groove (BG), the length of the ascending branch of the ACHA,...
Introduction
The purpose of this study was to perform a meta-analysis comparing open and arthroscopic surgical techniques for distal clavicle resection.
Methods
A systematic review of Medline, Embase, Scopus, and Google Scholar identified relevant publications in the English and German literature between 1997 and 2017. All included studies were le...
» Deforming forces make it difficult to reduce and maintain reduction of Neer type-II distal clavicular fractures.
» Contemporary surgical techniques are associated with high rates of union and good and excellent outcomes.
» Plate fixation of distal clavicular fractures does not address horizontal and vertical instability.
» Hook-plate fixation has...
Background
Lower extremity fractures have a profound negative effect on a patient’s gait and outcomes. Correction of deformity, and with it normalization of objective gait parameters, may result in better subjective and objective functional outcomes in patients treated with circular external fixation for malunited tibial fractures.
Aim
The purpose...
PurposeThe purpose of this study was to investigate the isokinetic, eccentric and isometric hamstring/quadriceps (HQ) ratios in patients before and after ACL reconstruction (ACLR) using bone–patellar tendon grafts and to establish the relationships between HQ ratio and knee function. Methods
Forty-four patients (mean age of 26.6 years) underwent is...
Purpose
The purpose of this study was to evaluate the clinical and functional outcomes of failed plate fixation in distal tibia fractures salvaged with hexapod circular fixators.
Materials and methods
The database of a specialized limb reconstruction center was searched for all patients with failed plate fixation undergoing limb reconstruction wit...
The evolution of a systematic approach to assessing pertinent investigations is known as evidence-based medicine (EBM). EBM is defined as the conscientious and judicious use of current best evidence from clinical care research and integration of clinical expertise in the management of individual patients. There is no doubt that EBM is important but...
Evidence-based medicine (EBM) guidelines were first introduced in 1986 and were defined as the conscientious, explicit, and judicious use of current best evidence in making decisions about the care of individual patients. The practice of EBM means integrating individual clinical expertise with the best available external clinical evidence from syst...
Background
Swimming induced pulmonary oedema is an uncommon occurrence and usually presents during strenuous distance swimming in cold water. The prevalence is most likely underreported and the underlying mechanisms are controversial. The purpose of this study was to summarize the evidence with regards to prevalence, pathophysiology and treatment o...
Bacterial DNA is present in a large percentage in failed anterior cruciate ligament reconstructions. A potential concern is the presence of biofilm on both failed anterior cruciate ligament reconstruction grafts and suture material. Despite the high prevalence of bacterial material observed, microbial cultures are rarely positive. However, it is cu...
International migration of healthcare professionals has increased substantially in recent decades. In order to practice medicine in the recipient country, International Medical Graduates (IMG) are required to fulfil the requirements of their new countries medical registration authorities. The purpose of this project was to compare the final fellows...
Open-wedge high tibial osteotomies result in a gap on the medial aspect of the proximal tibia and filling the gap with autologous bone graft may reduce nonunion rates and result in better functional outcomes. Autologous bone grafts are the golden standard, but synthetic bone fillers are an attractive option; however, current evidence suggests that...
Most closed humeral shaft fractures can be successfully managed nonsurgically. However, fractures for which closed treatment is unsuccessful are stabilized using either plates or intramedullary nails. There are shortcomings associated with each technique, including the potential complications of nonunion, infection, shoulder pain, and radial nerve...
Background
The purpose of this study was to conduct a bibliometric analysis of orthopaedic academic output in the United States.
Methods
Publications based on city and state origin, corrected for population size, median household income, total number of surgeons, and the number of various subspecialties were evaluated. The 15 highest-ranked orthop...
PurposeThe purpose of this study was to perform a systematic review and meta-analysis comparing single- and double-row biomechanical studies to evaluate load to failure, mode of failure and gap formation. Materials and methodsA systematic review of MEDLINE, Embase, Scopus and Google Scholar was performed from 1990 through 2016. The inclusion criter...
In addition to traumatic events such as hip dislocations, bony impingement can result in partial or complete tears of the ligamentum teres. The understanding of the biomechanical function, structural and mechanical properties of the ligament teres, and the reasons for tears is still evolving, and we should continue to look out for unusual appearanc...
Purpose:
The purpose of this systematic review was to investigate study quality and risk of bias for randomized trials comparing partial meniscectomy with physical therapy in middle-aged patients with degenerative meniscus tears.
Methods:
A systematic review of Medline, Embase, Scopus, and Google Scholar was performed from 1990 through 2017. The...
Background:
The purpose of this study was to evaluate the reliability and reproducibility of three commonly used radiographic measures for plantar surface angles.
Methods:
The calcaneal angle (CA), calcaneal pitch angle (CPA), and length-height index (LHI) was measured by three independent examiners on two occasions on lateral foot radiographs....
Human cadaveric specimens commonly serve as mechanical models and as biological tissue donors in basic biomechanical research. Although these models are used to explain both in vitro and in vivo behavior, the question still remains whether the specimens employed reflect the normal in vivo situation. The mechanical properties of fresh-frozen or pres...
Subpectoral tenodesis is performed at the surgical neck of the humerus. In a cadaveric study, the insertion of a unicortical PEEK (polyether ether ketone) screw decreased the torsional load to failure (fracture) by 30% compared with intact control specimens but was similar to unicortical reaming without screw insertion. Placing the biceps tendon in...
Our current trend and focus on evidence-based medicine is biased in favor of randomized controlled trials, which are ranked highest in the hierarchy of evidence while devaluing expert opinion, which is ranked lowest in the hierarchy. However, randomized controlled trials have weaknesses as well as strengths, and no research method is flawless. More...
Does imaging of the pelvis using a set of radiographs and computed tomography (CT) cause cancer? A computer-based simulation study using 5 different imaging and radiation dose protocols has calculated the lifetime risk of malignancy for young adults for pelvic radiographs and CT scans. The cumulative lifetime-attributable risk of cancer was 0.2% fo...
There are many bone block procedures described to treat glenoid bone defects in anterior shoulder instability and most of these techniques apparently result in anatomic reconstruction. However, anatomic restoration of the biconcave glenoid morphometry for bone defects in patients with anterior shoulder instability is nearly impossible.
Is the double bundle structure of the anterior cruciate ligament (ACL) a myth? Derotation untwists the ACL and results in a flat ribbon structure. However, other researchers dispute this theory and revealed 2 distinct bundles separated by a synovial septum. The answer is simple: we do not know and the evidence is conflicting.
Background
The purpose of this study was to perform a meta-analysis comparing open and arthroscopic surgery for the treatment of anterior shoulder instability by analyzing comparative studies during 2 different time intervals during the last 20 years.
Methods
We conducted a systematic review of MEDLINE, Embase, Scopus, and Google Scholar. Two grou...
Introduction:
This study compared bone transport to acute shortening/lengthening in a series of infected tibial segmental defects for infected tibial non-union.
Methods:
In a retrospective comparative study 42 patients treated for infected tibial non-union with segmental bone loss measuring between 3 and 10cm were included. Group A was treated w...
Background
Whether early or delayed surgical intervention in patients with multi-ligament injuries results in better outcomes, is of current and controversial debate.
Purpose
The purpose of this study was to perform a meta-analysis comparing early versus late surgical treatment of multi-ligament knee injuries.
Methods
We performed a systematic re...
AIM
To perform a bibliometric analysis of publications rates in orthopedics in the top 15 orthopaedic journals.
METHODS
Based on their 2015 impact factor, the fifteen highest ranked orthopaedic journals between January 2010 and December 2014 were used to establish the total number of publications; cumulative impact factor points (IF) per country w...
Purpose:
The purpose of this study was to compare the outcome of combined circular external fixation and cemented polymethylmethacrylate (PMMA) spacer application between a cohort of patients with grade 3 open fractures and infected tibial nonunions and concomitant segmental bone loss.
Methods:
The study was designed as a retrospective cohort st...
Purpose:
To use magnetic resonance imaging to determine the influence of the labrum on both the osseous version and effective diameter of the glenoid.
Methods:
This was a retrospective, cross-sectional study of patients with shoulder pain who underwent MRI between February 2014 and February 2015. The morphology of the glenoid labrum and glenoid...
The focus of predictive modeling or predictive analytics is to use statistical techniques to predict outcomes and/or the results of an intervention or observation for patients that are conditional on a specific set of measurements taken on the patients prior to the outcomes occurring. Statistical methods to estimate these models include using such...
Purpose:
The purpose of this study was to investigate the relationship between radiological alignment and functional outcomes including strength, range of motion (ROM), and disabilities of the arm, shoulder, and hand (DASH) and patient-rated wrist evaluation (PRWE) scores in elderly patients with united distal radius fractures.
Methods:
We revie...
Introduction:
The purpose of this retrospective study was to investigate the possible short-term benefit of a single intra-articular corticosteroid injection in those patients treated with physiotherapy when compared to a group of patients undergoing physiotherapy only (PT only).
Methods:
A retrospective chart review was conducted to identify el...
Introduction:
The purpose of this study was to survey the growth of Google Scholar public profiles in orthopedics over a 12-month period and to investigate global patterns.
Methods:
Data was prospectively acquired from June 2013 to June 2014. Google Scholar queries specific to orthopedic surgery were performed at 90-day intervals. Demographic as...
Introduction Research is a major component of innovation and can contribute to health improvements through a knowledge-to-action-process. 1 In general, the total number of publications by a country is one of the indicators of research output and productivity and is an important aspect of clinical excellence. 2-4 While the developing world contains...
In a comparative Level III study, Achtnich et al. compared suture anchor repair of acute proximal anterior cruciate ligament avulsion tears with single-bundle anterior cruciate ligament reconstruction with the quadrupled semitendinosus tendon. Short-term follow-up at a mean of 28 months showed that the between-group differences were not different....