# Platelet-rich Plasma in Orthopedics: Unraveling Cellular Mechanisms, Therapeutic Potential, and Limitations: Platelet-rich Plasma in Orthopedics

## TL;DR

This review explores the use of Platelet-Rich Plasma (PRP) in orthopedics, highlighting its potential and limitations in tissue repair and the need for standardized protocols.

## Contribution

The paper provides a comprehensive analysis of PRP's cellular mechanisms and therapeutic effects in orthopedic applications, emphasizing the need for standardization.

## Key findings

- PRP's effectiveness in tendon injuries, bone repair, and joint replacements shows promise but with conflicting clinical results.
- PRP influences tendon fibroblasts and may impact macrophage polarization, though results remain inconsistent.
- Standardized PRP preparation and application protocols are urgently needed to improve clinical outcomes.

## Abstract

The growing interest in autologous biological therapies, such as Platelet-Rich
Plasma (PRP), within orthopedic surgery and sports medicine, necessitates
refined strategies for post-surgical tissue repair. Despite technological
advancements, the proliferation of PRP preparation devices has raised concerns
about preparation quality consistency. The absence of consensus on
standardization and condition-specific formulations contributes to conflicting
outcomes in the literature. Moreover, the potential of personalized treatment
protocols, platelet dosage optimization, and PRP’s angiogenic, antimicrobial,
and analgesic properties in orthopedic surgery remains underexplored. This
review delves into recent advancements in PRP preparation techniques and
therapeutic effects, drawing from published data on its applications in
orthopedic surgery for tendon injuries, bone repair, spinal fusion, and major
joint replacements. Despite promising preclinical study results, clinical trials
have shown varying efficacy compared to traditional repair methods. Mechanisms
underlying PRP’s actions, including its impact on tendon fibroblasts and
macrophage polarization, are scrutinized. While PRP elicits an inflammatory
response in tendon fibroblasts, its effect on macrophage polarization remains
ambiguous. Additionally, inconclusive findings from studies on PRP’s
effectiveness in shoulder surgery underscore the need for standardized protocols
and further investigation due to challenges like preparation discrepancies and
application techniques. This review focusing on influence on healing quality and
pace.