This Week in Orthopedics — Aug 7, 2026

Welcome to This Week in Orthopedics. This week we're covering 10 notable papers spanning shoulder arthroplasty technique and bearing surfaces, knee ligament and osteotomy decision-making, spine risk stratification in the very young and the very old, and implant fixation and hip preservation. Let's dive in.

We start at the shoulder, where three papers converge on a familiar question: which technical details actually change outcomes. The Journal of Bone and Joint Surgery published a patient-blinded randomized controlled trial settling some of the long-running debate about the subscapularis in reverse total shoulder arthroplasty [1]. Eighty-five shoulders in eighty-one patients with a repairable subscapularis were randomized to repair or non-repair of the lesser tuberosity osteotomy fragment. At two years, the repair group scored meaningfully higher on the American Shoulder and Elbow Surgeons score, about ninety versus eighty-two, and had roughly seven times the odds of achieving improved internal rotation. Importantly, that came without any loss of motion in other planes, which has historically been the argument against repair. This is Level I evidence that when the tendon is intact enough to reattach, reattaching it is the better default. From the Journal of Shoulder and Elbow Surgery, a national registry analysis of more than ten thousand primary anatomic total shoulder arthroplasties for osteoarthritis looked at glenoid polyethylene type, humeral head size, and head material [4]. Highly cross-linked polyethylene glenoids showed a fifteen-year cumulative revision rate of six percent versus about eleven percent for conventional polyethylene, translating to roughly a forty-five percent higher revision hazard with non-cross-linked components. But the benefit was not uniform. It emerged mainly with mid-range heads, forty-four to fifty millimetres, and disappeared at the smallest and largest head sizes; with ceramic heads there was no difference at all, and with metal heads under forty-four millimetres the cross-linked bearing actually showed a higher revision risk. So the message is not simply that cross-linked polyethylene is always better, but that bearing surface and head geometry interact, and registry-level effects are modest. The same journal reported a single-centre propensity-matched analysis of scapular stress fracture after reverse arthroplasty [7]. The incidence was five point four percent across five hundred fifty-one cases. Reassuringly, pain scores and patient-reported outcomes at final follow-up were no different from matched controls, but forward flexion and abduction were both significantly lower, by roughly ten to fourteen degrees. Levy type III fractures fared worst for motion, and critically, neither operative treatment nor radiographic union changed the final result. That argues against aggressive surgical intervention for these fractures and supports counselling patients that the main cost is elevation, not pain.

Turning to the knee, the American Journal of Sports Medicine published a large registry-based cohort of five thousand six hundred fifty-three primary anterior cruciate ligament reconstructions that should give pause to anyone who has recently switched to quadriceps tendon autograft [3]. Overall non-revision reoperation was nineteen percent in the quadriceps group versus about nine percent for hamstring and seven percent for bone-patellar tendon-bone, driven almost entirely by procedures for extension deficit or pain. After adjustment, quadriceps grafts roughly doubled the odds of reoperation for stiffness or pain, and patients were substantially less likely to reach the minimal important change on the Knee Injury and Osteoarthritis Outcome Score compared with either alternative. Both quadriceps and patellar tendon grafts also had about twice the odds of treatment failure versus hamstring. A sex-stratified signal is worth noting: women had higher reoperation rates than men, and women receiving larger grafts, nine and a half to twelve millimetres, had about seventy percent higher odds of reoperation for extension deficit or pain — a caution against reflexively maximizing graft diameter in smaller knees. This is Level 3 evidence with the usual confounding-by-indication caveats, but the effect size is large enough to justify revisiting your graft selection conversation. Alongside that, Knee Surgery, Sports Traumatology, Arthroscopy published a narrative review and consensus recommendation from the Osteotomy Committee of the German Knee Society on managing increased posterior tibial slope in the anterior cruciate ligament-deficient knee [6]. Three practical points: measure the slope on long lateral radiographs using the mechanical axis with the posterior condyles exactly superimposed; do not use a single fixed cut-off to decide on osteotomy, but base it on individual risk including instability, meniscal status, number and quality of previous reconstructions, and contact versus non-contact mechanism; and when correcting, no anterior closing wedge technique has proven superior, though the infratuberositary approach is recommended as technically easier and safer. This is expert opinion, Level V, so it is a framework rather than a mandate.

The spine section this week is really about risk stratification at the extremes of age. In the Journal of Bone and Joint Surgery, an analysis of more than forty-six thousand pediatric spinal fusions from the National Surgical Quality Improvement Program pediatric database showed that frailty and surgical invasiveness are independently associated with complications [5]. Severely frail children had nearly seven times the odds of any adverse event and, strikingly, more than twenty times the odds of a severe adverse event compared with non-frail children, with reoperation and readmission odds roughly tripled and quadrupled. High-invasiveness surgery independently raised the odds of any adverse event by about sixty percent and severe adverse events roughly twofold. The two domains stack — the frailest children undergoing the biggest operations had the highest event rates — which makes a strong case for scoring both patient vulnerability and planned operative magnitude at the consent conversation. At the other end of life, Spine reported a propensity-matched TriNetX analysis of anterior cervical discectomy and fusion in octogenarians [8]. Multi-level surgery raised early dysphagia in the first two weeks from eight to about eleven and a half percent, roughly a forty percent relative increase, but the difference vanished by six weeks. Octogenarians also had higher early dysphagia than patients aged fifty to sixty-nine after both single and multi-level surgery, again resolving by six to twenty-four weeks. So the risk is real but transient — the actionable step is proactive swallowing precautions and counselling in the first fortnight, not avoiding multi-level surgery. Also from Spine, a propensity-matched database study found that patients on SGLT2 inhibitors before anterior cervical discectomy and fusion had fewer postoperative emergency department visits, lower one-year pseudarthrosis at about five versus seven percent, and lower five-year reoperation, with no excess of acute kidney injury, infection, or intensive care admission [10]. This is association, not causation, in a diabetic population, and it cannot tell you whether to hold or continue the drug perioperatively — but it does argue against assuming these agents are a liability around fusion surgery.

Two hip papers round out the week. Acta Orthopaedica published a randomized controlled trial in sixty-one patients comparing a short collum-fixated femoral stem with a conventional metaphyseal and diaphyseal-engaging stem, using dual-energy X-ray absorptiometry to measure periprosthetic bone density [2]. At two years, the short stem preserved significantly more bone in Gruen zones three, five, and seven, with relative differences of roughly nine to nineteen percent. However, patient-reported outcomes — the Oxford Hip Score, EQ-5D, and Forgotten Joint Score — improved equally in both groups with no significant differences. So the benefit is radiographic bone stock, which may matter for future revision, and not yet clinical. Also in Acta Orthopaedica, a nationwide Swedish cohort of twenty-eight patients undergoing capital realignment, predominantly the modified Dunn procedure, for slipped capital femoral epiphysis reported an overall avascular necrosis rate of twenty-two percent [9]. That risk was concentrated in unstable slips — four of eight — versus two of nineteen stable slips, and notably none of the eight hips with intraoperative epiphyseal perfusion monitoring developed necrosis. Functional scores were best when realignment was performed as primary treatment within a month of diagnosis. The authors conclude the procedure should be reserved for stable slips, done early, with perfusion monitoring — a small cohort, but a sobering national denominator.

If you only have time for one paper this week, make it the randomized trial of lesser tuberosity osteotomy repair in reverse shoulder arthroplasty from the Journal of Bone and Joint Surgery [1]. It is Level I evidence on a genuinely contested intraoperative decision that most shoulder surgeons face every week, and it points clearly in one direction.

Here are the key takeaways from this week in Orthopedics. When the subscapularis is repairable in a reverse shoulder arthroplasty, repair it — better function and internal rotation, no cost to other planes. Quadriceps tendon autograft carried roughly double the odds of reoperation for extension deficit or pain and worse patient-reported outcomes than hamstring at two years, so revisit your default graft, especially in women where larger grafts fared worse. Score both frailty and surgical invasiveness before pediatric deformity surgery; the frailest children undergoing the largest operations face dramatically elevated severe complication risk. Scapular stress fracture after reverse arthroplasty costs elevation but not pain, and neither surgery nor union changed the final outcome. And in the very elderly, dysphagia after anterior cervical fusion is an early, transient problem — counsel and mitigate in the first two weeks rather than avoiding multi-level surgery.

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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