This Week in Orthopedics — Aug 27, 2026

Welcome to This Week in Orthopedics. This week we're covering 10 notable papers spanning shoulder arthroplasty and rotator cuff surgery, joint preservation around the knee and hip, and a cluster of spine papers on classification, biomarkers, and operating on older patients. Let's dive in.

We'll start at the shoulder, where a registry study, a meta-analysis, and a randomised trial each push in a slightly different direction. In the Journal of Shoulder and Elbow Surgery, Nguyen and colleagues interrogated more than sixty-three thousand primary stemmed reverse total shoulder replacements from the Australian Orthopaedic Association National Joint Replacement Registry, asking whether the degree of polyethylene cross-linking matters for revision [1]. Stratified by the three commonest diagnoses, the answer was that it does, but selectively. For osteoarthritis, non-crosslinked glenospheres carried roughly triple the revision risk from about eighteen months onward compared with highly crosslinked components, with no such signal in rotator cuff arthropathy or fracture. Non-crosslinked humeral cups in osteoarthritis showed about a thirty percent higher revision rate, and after fuller adjustment for the post-2015 cohort including body mass index, glenosphere size, and image-derived instrumentation, that penalty rose to roughly eighty percent higher in osteoarthritis and about fifty percent higher in cuff arthropathy. The detail worth carrying into clinic is that the commonest reason for revision in the non-crosslinked osteoarthritis group was infection, which is biologically curious and reminds us that all-cause revision in a registry is not the same as wear failure. The glenosphere signal was substantially confounded by patient and implant covariates; the humeral cup signal held up better.

Staying at the shoulder, Arthroscopy published a systematic review and meta-analysis by Seok and colleagues pooling eighteen randomised controlled trials and just over thirteen hundred patients comparing single-row with double-row arthroscopic rotator cuff repair [2]. Across all comers, double-row repair reduced retears — overall retear was close to twice as likely after single-row repair, and partial-thickness retear nearly three times as likely — with modest advantages in the University of California Los Angeles score and forward flexion, at the cost of meaningfully longer operating time. The clinically useful part is the subgroup split at thirty millimetres. For tears larger than thirty millimetres, double-row repair was consistently better on both function and structural healing. For tears under thirty millimetres, the two techniques were indistinguishable on every outcome. So the practical message is to reserve the extra anchors, the extra time, and the extra cost for the large tears, and to feel comfortable with an efficient single-row construct for small and medium tears. Alongside that, a Level One prospective randomised trial in the Journal of Shoulder and Elbow Surgery from Sarıkaş and colleagues addressed a question most of us settle by habit: which immobilisation device to use when treating a proximal humeral fracture non-operatively [3]. They randomised just over a hundred patients to a Velpeau bandage, a standard shoulder-arm sling, or a padded shoulder-arm sling, and found no differences at all — not in the Subjective Shoulder Value, pain scores, the American Shoulder and Elbow Surgeons score, the Disabilities of the Arm, Shoulder and Hand score, the Constant score, or range of motion. Nonunion occurred in about four percent of patients and malunion in roughly a fifth, with malunion rates comparable across groups. That is a genuinely negative trial in the most useful sense: choose the device your patient finds most comfortable and your department can most cheaply supply.

Our second theme is joint preservation — the knee and the hip — and here two papers offer encouragement while two temper enthusiasm. In Knee Surgery, Sports Traumatology, Arthroscopy, Hennessy and colleagues used twenty-five years of Hospital Episode Statistics data from England to describe the short-term safety profile of nearly twenty-five thousand osteotomies around the knee, mostly high tibial osteotomies [4 is not this one — see reference list] [5]. In a population averaging forty-one years of age and largely free of comorbidity, about two percent of patients underwent a reoperation within ninety days and about seven percent within a year, with infection accounting for roughly two percent of patients at one year. Conversion to arthroplasty within the first year was well under one percent. Serious medical complications within ninety days affected about two percent of patients, with pulmonary embolism in roughly four per thousand and myocardial infarction and stroke each in about three per ten thousand. Comorbidity burden, not the procedure itself, was the strongest predictor of trouble — useful, concrete numbers for a consent conversation. Complementing that, Arthroscopy published a meta-analysis by Xiang and colleagues of ten randomised trials and 460 patients with osteonecrosis of the femoral head, comparing core decompression alone with core decompression plus bone marrow-derived cell therapy [6]. The combination improved pain and hip function and roughly halved the risk of losing the hip joint, with no excess adverse events. The important caveat, which the authors state plainly, is that radiographic progression did not differ between groups, and the evidence base is small and heterogeneous — so this is a signal worth acting on cautiously rather than a settled standard.

On the more sceptical side, Vasiliadis and colleagues in Knee Surgery, Sports Traumatology, Arthroscopy pooled six comparative studies — only one of them randomised — covering just over three hundred patients, to ask whether adding a centralisation procedure to medial meniscus posterior root repair actually controls meniscal extrusion [9]. It did not, in any convincing way. Post-operative extrusion was numerically lower in the centralisation group, but the absolute difference was about half a millimetre, well inside measurement noise, and heterogeneity across studies was high. Lysholm, International Knee Documentation Committee, and pain scores were all indistinguishable. For now, centralisation should be regarded as unproven rather than routine. And in a sobering small series in Arthroscopy, Akrivos and colleagues followed patients who developed postoperative infection after anterior cruciate ligament reconstruction out to a mean of sixteen years [7]. All seven infected knees had radiographic three-compartment osteoarthritis, compared with about a third of matched uncomplicated controls. Alignment, laxity, and clinical scores did not differ, which is both reassuring for function and a warning that the radiographic damage accrues silently. Seven patients is a very small number, but the direction is unambiguous and the message for infection prophylaxis and aggressive early management is clear.

Our third theme is spine, where this week's papers are about decision-making rather than technique. Spine published a global survey by Vaccaro and colleagues of 159 spine surgeons and neurosurgeons, using clinical vignettes built on the AO Spine Upper Cervical Injury Classification to derive an operative threshold score [4]. Patterns scoring three or below were managed non-operatively with consistency, patterns scoring five or above were treated operatively, and a score of four sat in a genuine equipoise zone with no consensus. High-severity morphology, unstable B2 subtypes, and any significant neurological impairment crossed the operative threshold. This is expert opinion rather than outcome data, but it gives a shared vocabulary for upper cervical trauma discussions. Also in Spine, Lovecchio and colleagues prospectively measured bone turnover markers before and six weeks after anterior cervical discectomy and fusion in 33 analysable patients, of whom about thirty percent had radiographic pseudarthrosis at one year [8]. Baseline demographics and surgical factors did not separate the groups, but the early rise in procollagen type 1 N-propeptide was significantly greater in patients who went on to fail to fuse, and it remained an independent predictor in regression. Bone resorption measured by C-telopeptide did not differ. With 25 of 58 enrolled patients missing their six-week labs, this is hypothesis-generating, but it raises the possibility of identifying non-union risk at six weeks and testing anabolic agents in that window. Finally, Hardacker and colleagues in Spine propensity-matched 83 patients aged seventy or older against 83 younger patients undergoing short-segment antero-posterior lumbar fusion for degenerative disease [10]. Surgical time, blood loss, length of stay, and complication rates in hospital and at thirty days, ninety days, and one year were all similar. The one real difference was discharge destination: about a third of the older patients went somewhere other than home, versus one in ten of the younger group. Age alone should not exclude a patient from circumferential fusion, but discharge planning should start before the incision.

If you only have time for one paper this week, make it the Arthroscopy meta-analysis of single-row versus double-row rotator cuff repair [2]. It draws a clean, size-based line through a technique debate that has run for two decades, and it will change what you plan for the next small tear on your list.

Here are the key takeaways from this week in Orthopedics. Reserve double-row rotator cuff repair for tears over thirty millimetres; for smaller tears, single-row is equivalent and faster. For conservatively managed proximal humeral fractures, the immobilisation device does not affect outcome, so choose on comfort and cost. In reverse shoulder arthroplasty for osteoarthritis, non-crosslinked polyethylene components were associated with higher all-cause revision, with infection prominent among the reasons. Osteotomy around the knee is safe in young, healthy patients, with about two percent ninety-day reoperation and two percent ninety-day medical complications, and comorbidity is the dominant risk driver. Adding centralisation to medial meniscus root repair has not been shown to reduce extrusion meaningfully. And in the spine, age alone is not a contraindication to circumferential lumbar fusion, though non-home discharge is three times more likely in patients over seventy.

That's your roundup for This Week in Orthopedics. The full transcript and references are available on the episode page in your AudioScholar library. This is an AI-curated summary — for clinical decisions, always consult primary sources and current guidelines. See you next week.

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This is an automated summary generated by artificial intelligence, which can make mistakes. Always review the original source materials.