Publications by authors named "Jeong Hyeon Jang"
Article Synopsis
- The study focuses on customizing the humeral component retroversion (HcRV) during reverse total shoulder arthroplasty (RTSA) to match the patient's natural humeral retroversion using CT scans.
- A new method was developed to assess postoperative HcRV, which showed excellent reliability in comparisons between preoperative and postoperative measurements.
- Results indicated high agreement between the postoperative HcRV and the planned insertion angles, with 86.8% of cases falling within 5° of accuracy.
Background: This study aims to investigate the trend of doctor shopping among patients with rotator cuff tear (RCT) before undergoing surgery and to examine the relevance of these findings to the public.
Methods: A survey was conducted of 326 patients from 10 hospitals (male, 176; female, 150) who underwent arthroscopic rotator cuff repair (ARCR) for symptomatic RCT between September 2019 and February 2020. A questionnaire was used to obtain data regarding the type of medical care service, medical institutions visited before surgery, number of treatments received, and cost of treatment.
Introduction: Bicortical screw fixation, which penetrates and fixes the near and far cortex of bone, has been conventionally used to achieve compressive fixation for fracture using screws. Open reduction and internal fixation using the locking plate are widely used for treating proximal humerus fractures. However, minimal contact between the bone and the locking plate can lead to an insufficient reduction.
View Article and Find Full Text PDFSpontaneous resolution of spinoglenoid ganglion cyst: a case series.
J Shoulder Elbow Surg
August 2024
Article Synopsis
- A study documented 12 patients with spinoglenoid notch ganglion cysts (SGCs) that resolved on their own without surgery over a period from 2011 to 2023.
- The median time for resolution was 13.2 months, with significant improvements in pain levels and shoulder mobility observed in patients post-resolution.
- The findings suggest that non-surgical treatment may be sufficient for SGCs, particularly when there is no nerve involvement or related physical issues.
Purpose: To investigate the effect of recombinant human parathyroid hormone (rhPTH) biocomposite on bone-to-tendon interface (BTI) healing for surgical repair of a chronic rotator cuff tear (RCT) model of rabbit, focusing on genetic, histologic, biomechanical and micro-computed tomography (CT) evaluations.
Methods: Sixty-four rabbits were equally assigned to the 4 groups: saline injection (group A), nanofiber sheet alone (group B), rhPTH-soaked nanofiber sheet (nanofiber sheet was soaked with rhPTH, group C), and rhPTH biocomposite (rhPTH permeated the nanofiber sheet by coaxial electrospinning, group D). The release kinetics of rhPTH (groups C and D) was examined for 6 weeks in vitro.
Article Synopsis
- Osteonecrosis of the humeral head (ONHH) is the second most common type of osteonecrosis, but its epidemiological data is limited compared to osteonecrosis of the femoral head (ONFH).
- A study analyzed data from South Korea's Health Insurance Review and Assessment (HIRA) database from 2008 to 2018 to compare trends in surgical treatment for ONHH and ONFH.
- Findings showed ONHH is less common, occurring mainly in older females, while ONFH predominantly affects middle-aged males; ONHH also has a higher rate of post-traumatic cases and a greater frequency of surgical interventions like arthroplasty.
Article Synopsis
- This study investigates the effects of far-infrared radiation (FIR) on pain, range of motion, and healing after arthroscopic rotator cuff repair in 64 patients.
- Patients were divided into two groups: one receiving FIR treatment for 10 weeks and a control group without it.
- Results showed that the FIR group experienced significantly lower pain levels at 5 weeks and 3 months, but there were no notable differences in range of motion, functional scores, or healing rates between the two groups.
Article Synopsis
- This study investigates how to identify rotator cuff tears in patients with shoulder stiffness using MRI findings, as stiffness can mask typical MRI indicators.
- Researchers reviewed data from patients who had arthroscopic rotator cuff repairs, focusing on various MRI metrics of the shoulder, especially in patients exhibiting stiffness.
- They found that increased anterior capsular thickness and distinct hyperintensities were strong indicators of stiffness, with specific measurements yielding high diagnostic accuracy.
Background: The incidence of rotator cuff tears is rapidly increasing, and operative techniques for rotator cuff repair have been developed. However, the rates of postoperative retear remain high.
Purpose/hypothesis: The purpose was to determine the effects of human dermal fibroblasts (HDFs) with hyaluronic acid (HA) on tendon-to-bone healing in a rabbit model of chronic rotator cuff tear injury.
Article Synopsis
- The study compares the transosseous anchorless repair (ToR) technique to the conventional suture anchor (SA) method in arthroscopic rotator cuff repair (ARCR) to evaluate clinical outcomes and cyst formation.
- While both techniques showed similar rates of implant failure and retear, the ToR group did not experience any peri-implant cysts, whereas 16.7% of the SA group did.
- The findings suggest that the ToR technique may offer certain advantages, such as lower risks of additional surgeries and reduced medical costs, making it a promising option for ARCR.
Article Synopsis
- The study compared outcomes from two types of glenoid components used in anatomical total shoulder arthroplasty: convertible metal-backed and conventional cemented polyethylene components, focusing on patient recovery and complications.
- Fifty patients were analyzed, with results showing significant clinical improvement post-surgery for both groups, and no major differences in functional angles between the two types of components.
- However, the convertible metal-backed group had significantly lower complication rates, particularly fewer radiolucent lines, suggesting it may be a more reliable option for reducing future revision surgeries.
Article Synopsis
- - The study investigates the relationship between the size of spinoglenoid cysts and various clinical factors like nerve function, muscle strength, and pain, aiming to establish a size threshold for surgical intervention.
- - It included patients diagnosed with spinoglenoid cysts via MRI between 2010 and 2018, focusing on measuring cyst size, conducting nerve tests, and analyzing muscle performance before and after surgery.
- - Results showed that cysts larger than 2.2 cm were linked to nerve function abnormalities and improved muscle strength post-surgery, suggesting that this size can be used as a guideline for deciding on decompression surgery.
Article Synopsis
- The study investigates the effectiveness of bioactive scaffolds that deliver growth factors over time to improve the healing of the bone-to-tendon interface (BTI) after rotator cuff repair.
- Conducted on 50 rabbits with chronic rotator cuff tears, the research compares outcomes between groups receiving saline, scaffolds without growth factors, and scaffolds with growth factors.
- Results show that scaffolds with growth factors led to significantly better healing, with higher mRNA expression of important collagen types, improved matrix formation, and stronger mechanical properties at the BTI compared to the other treatments.
Subacromial notching after reverse total shoulder arthroplasty.
J Shoulder Elbow Surg
September 2023
Article Synopsis
- Scapular notching is a known complication after reverse total shoulder arthroplasty (RTSA), while subacromial notching (SaN) has not been previously recognized clinically, prompting this study to examine its risk factors and impacts on patient function.
- The research involved a review of 125 patients who underwent RTSA, identifying SaN based on imaging comparisons from before and after surgery, while assessing pain levels and shoulder functionality via standard medical scales.
- Findings revealed that 12.8% of patients developed SaN, with preoperative acromion distance and postoperative humerus lateralization identified as significant risk factors, linking SaN with worse postoperative pain and shoulder function outcomes.
Article Synopsis
- The study investigates the impact of extracorporeal shock wave therapy (ESWT) on posterior rotator cuff tears (RCTs), which are less common and not well understood compared to anterior RCTs.
- Among 294 patients analyzed, 24 had posterior RCTs, and it was found that these patients had a higher frequency of calcific deposits and a greater likelihood of undergoing ESWT for both calcification removal and pain relief.
- The findings suggest a potential link between ESWT and an increased prevalence of posterior RCTs, highlighting the need for careful consideration of ESWT in treating related conditions like calcific tendinitis and tendinopathy.
Reverse total shoulder arthroplasty (RTSA) emerged as a new concept of arthroplasty that does not restore normal anatomy but does restore function. It enables the function of the torn rotator cuff to be performed by the deltoid and shows encouraging clinical outcomes. Since its introduction, various modifications have been designed to improve the outcome of the RTSA.
View Article and Find Full Text PDFBackground: There is a lack of studies about serum and tissue vitamin D levels of the rotator cuff muscle on muscle power, fatty degeneration, and healing failure after rotator cuff repair (RCR). Furthermore, no studies have evaluated vitamin D receptor proteins in the rotator cuff that show a close association with serum vitamin D levels.
Purpose: To evaluate the correlations between serum vitamin D and tissue vitamin D as well as perioperative variables of arthroscopic RCR.
Background: The optimal management for massive rotator cuff tears (MRCTs) without osteoarthritis (OA) remains controversial. The purpose of this study was to evaluate and compare the clinical outcomes of reverse shoulder arthroplasty (RSA) vs. rotator cuff repair (RCR) in patients with MRCTs without OA.
View Article and Find Full Text PDFPurpose: This study aimed to evaluate the effect of retear on long-term functional outcomes and glenohumeral joint osteoarthritis (OA) progression after arthroscopic rotator cuff repair (ASRCR).
Methods: We retrospectively reviewed 201 patients who underwent ASRCR and were followed up for at least 5 years. Rotator cuff tendon structural integrity was evaluated using magnetic resonance imaging and/or ultrasonography.
Article Synopsis
- This study aimed to compare the effects of allogeneic dermal fibroblasts (ADFs) and platelet-rich plasma (PRP) on healing chronic rotator cuff tears in rabbits.
- After a 6-week healing period, transosseous repairs were performed, and gene expression, as well as histologic and biomechanical properties, were evaluated at 4 and 12 weeks post-repair.
- Results indicated that ADFs led to greater expression of key healing genes at 4 weeks and improved structural and mechanical healing at 12 weeks compared to PRP, suggesting ADFs might be more effective for tendon-to-bone healing.
Background: There is growing interest in various biological supplements to improve tendon healing in patients after arthroscopic rotator cuff repair. The ideal biological supplement to strengthen rotator cuff remains unknown.
Purpose: To assess the safety and efficacy of autologous cultured dermal fibroblast (ADF) injection on tendon-to-bone healing in patients after arthroscopic rotator cuff repair.
Purpose: Conventionally, the central structure of the baseplate is inserted through the point where the vertical and horizontal axes of the glenoid intersect (conventional insertion site (CIS)). However, there is scanty theoretical evidence that CIS has the optimal bone stock. We evaluated the optimal insertion site for the glenoid baseplate through the three-dimensional volumetric measurement of the glenoid bone stock.
View Article and Find Full Text PDFBackground: Tenocytes derived from tendons have been reported to be effective in the treatment of rotator cuff tears through the expression of extracellular matrix proteins. Human dermal fibroblasts, known to express collagen types I and III as tenocytes do, may likely be substitutes for tenocytes to enhance healing rotator cuff tears.
Purpose: To demonstrate the capability of human dermal fibroblasts to enhance healing of rotator cuff tears.
Article Synopsis
- Osteoporosis significantly impacts tendon healing after arthroscopic rotator cuff repair, but traditional DXA scans of the hip and lumbar spine don't accurately measure bone mineral density in the proximal humerus.
- In a study of 212 patients, it was found that the bone mineral density in the affected shoulder was lower than in the healthy side, and the trabecular bone score from lumbar DXA showed a weak correlation with proximal humeral BMD.
- The only significant risk factor identified for intraoperative suture anchor failure was the BMD of the greater tuberosity of the proximal humerus, highlighting the need for direct measurement methods to assess proximal humeral osteoporosis more effectively.
Background: Platelet-rich plasma (PRP) has been applied as an adjuvant treatment for arthroscopic rotator cuff repair (ARCR) to enhance rotator cuff healing. However, it remains debatable whether PRP enhances tendon-to-bone healing.
Purpose: To assess the efficacy of intraoperative augmentation and postoperative injection of PRP that was prepared using the double-spin method and calcium activation without thrombin in patients with ARCR.