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This letter to the editor is a response to an article titled "Early versus late physiotherapy following arthroscopic repair of small and medium size rotator cuff tear: a randomized clinical trial." The author of the letter acknowledges the contribution of the original article in studying the effects of early and late physiotherapy on shoulder joint recovery after rotator cuff repair. However, they suggest that individual differences and compliance with physical therapy may impact the accuracy of the experiment, and recommend the use of intelligent sports equipment to reduce bias. They also mention that the long-term clinical difference between early and late physiotherapy is still controversial, citing other studies that negate the differences or highlight potential risks. The letter concludes by thanking the author and expressing anticipation for a reply. [Extracted from the article]

This letter to the editor discusses a retrospective study on the use of extracorporeal shock wave therapy (ESWT) in treating osteonecrosis of the femoral head (AVNFH). The study found that ESWT can reduce pain, improve range of motion, and delay surgical intervention in patients with AVN of the femoral head. However, the letter raises some concerns about the study, including the accuracy of locating the AVN margin during operation and the impact of shock wave energy and number of treatments on patient outcomes. The authors suggest further research to address these issues. [Extracted from the article]

In this article, the authors found that total knee arthroplasty (TKA) post-wound drainage can increase blood loss and length of hospital stay. Of course, some sicker patients are more likely to be assigned to the drainage and TXA groups, and the sicker patients have a poorer prognosis in the first place. No difference in blood loss and risk of transfusion between patients treated with one or two doses of intravenous tranexamic acid after simultaneous bilateral TKA. [Extracted from the article]

Although the bone mineral density measured in the article reflects the level of bone remodeling, there are still other factors that jointly determine the level of bone health, such as bone fragility [[5]]. Recently, we read Shinya Hayashi's article "Comparison study of periprosthetic bone remodeling between simultaneous bilateral total hip arthritis and unilateral total hip arthritis: a matched cohort study" [[1]], which aroused our great interest. [Extracted from the article]

This study did not analyze the postoperative pain status of the two groups of patients, so the use of VAS to evaluate the postoperative pain status of patients can make the research results comprehensive. The larger the diameter of the intramedullary nail, the better the stability, and patients with little medullary cavities usually need multiple reamings to help place the intramedullary pin with an appropriate diameter and improve strength. Secondly, Wang et al. [[3]] evaluated the postoperative pain status of patients by visual analogue scale (VAS) and believed that intravenous injection of TXA was beneficial to the early postoperative pain relief of high tibial osteotomy. [Extracted from the article]

Dear editor, We have recently been very interested and discussed in depth an article entitled "Patella non-resurfacing in primary total knee arthroplasty provides good functional results - a retrospective review of nine thousand three hundred forty six knees" [[1]]. For example, Fan et al. [[2]] found that in patients undergoing total knee arthroplasty, cautery depths of 1 to 3 mm on the patella effectively reduced anterior knee pain. [Extracted from the article]