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How is tendon healing measured?

Tendon healing is assessed through a combination of clinical scoring systems, imaging, and biomechanical testing. This page outlines the methods used in research studies, from the Constant-Murley score to histopathology

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How is tendon healing measured?

Tendon healing is measured using a combination of patient-reported outcome measures, imaging modalities, and, in preclinical models, histopathological and biomechanical testing. The most commonly reported clinical measure in rotator cuff repair studies is the Constant-Murley score (CMS), a composite scale that incorporates pain, function, range of motion, and strength [2]. Other trials may use tendon-specific pain scores or imaging-based assessments of tendon integrity, but the CMS remains a standard endpoint for clinical healing after surgical repair.

At the molecular level, tendon healing research often centres on growth factor signalling pathways, including fibroblast growth factor (FGF) and vascular endothelial growth factor (VEGF) families, which regulate angiogenesis and cellular recruitment to the injury site [5].

Research Studies

BPC-157 and tendon healing after rotator cuff repair

A randomized, double-blind, placebo-controlled pilot trial is investigating the effects of BPC-157 on tendon healing and functional recovery following arthroscopic rotator cuff repair (aRCR) [1]. Twenty patients will receive either BPC-157 or saline placebo via daily subcutaneous injections for 90 days after surgery. The study notes that BPC-157 has shown regenerative and anti-inflammatory effects in preclinical animal models of musculoskeletal injury, but it has not yet been studied in formal human clinical trials [1].

Autologous microfragmented lipoaspirate and long-term outcomes after rotator cuff repair

A prospective randomized controlled single-blind trial evaluated the safety and efficacy of autologous microfragmented lipoaspirate tissue in arthroscopic rotator cuff repair [2]. The primary hypothesis was that intraoperative injection of autologous microfragmented adipose tissue, processed with an enzyme-free technology, could improve clinical outcomes of single-row arthroscopic rotator cuff repair as measured by the Constant-Murley score at least 5 years after surgery [2].

Metformin and chronic Achilles tendon pain

An exploratory clinical trial is assessing the effect of oral metformin in non-diabetic patients with chronic Achilles tendon pain [3]. The trial has two aims: to assess the effects of metformin treatment on tendon pain, and to determine the effects of metformin capsules on tendon healing and repair. Twenty participants will receive metformin for 16 weeks combined with a home exercise program, while a comparison group of 20 participants will receive placebo tablets with the same exercise program [3].

Sex hormone supplementation and rotator cuff repair

A pilot study is investigating whether sex hormone therapy improves tendon healing and shoulder function in men with low sex hormone levels undergoing rotator cuff repair [4]. Participants will be randomly assigned to receive sex hormone therapy or placebo pills while healing from tendon repair surgery. The investigators will test whether increased sex hormone levels show promise in improving tendon healing, patient shoulder function, and pain [4].

bFGF and VEGFA gene delivery in tendon healing

Preclinical research has explored spatially distributed delivery of basic fibroblast growth factor (bFGF) and vascular endothelial growth factor A (VEGFA) genes to tendon and peritendinous tissues [5]. Tendon healing is limited by inadequate vascularity and low cellularity within the tendon, whereas surrounding peritendinous tissues include vascular, stromal, and extrinsic reparative cells. This approach aims to enhance early tendon healing by targeting both the tendon and its surrounding tissues [5].

BPC-157 and TB-500 in a rat Achilles tendon model

A study in rats evaluated the effects of BPC-157, synthetic thymosin beta-4 (TB-500), and their combination on Achilles tendon healing using biomechanical, histopathological, histochemical, and immunohistochemical analyses [6]. This research was conducted in an animal model and does not provide data on human tendon healing.

BMP-7 and low-molecular-weight peptide solution in a rat rotator cuff model

Another rat study assessed the effects of bone morphogenetic protein-7 (BMP-7) and a low-molecular-weight peptide solution on early tendon-to-bone healing in a rotator cuff tear model [7]. The study used histopathologic and biomechanical methods to evaluate healing. These findings are from an animal model and have not been confirmed in human trials.

GHRP-2 and tendon-bone healing in a rat rotator cuff model

Research in a rat rotator cuff tear model explored the potential of growth hormone-releasing peptide 2 (GHRP-2) for tendon-bone healing [8]. The study examined the impact of GHRP-2 on M1 macrophage polarization in vitro using real-time polymerase chain reaction, Western blot, and immunofluorescence, and assessed histologic and biomechanical healing properties. This work is preclinical and does not establish clinical outcomes in humans.

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