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In the field of orthopedic research, preclinical orthopedic CROs play a crucial role in assessing the efficacy and safety of pharmaceutical drugs before they can enter the clinical trial phase. These studies are conducted by specialized contract research organizations (CROs) that offer preclinical orthopedic testing services. This feature outlines a comprehensive nonclinical animal experimental plan for evaluating the efficacy and safety of pharmaceutical drugs in the discovery and development pipeline for orthopedic applications.

Study Design and Timeline for Preclinical Orthopedic Animal Studies

The nonclinical animal experimental plan involves a systematic approach to ensure reliable and reproducible results. The study is divided into different stages, including study initiation, protocol development, animal procurement, surgical procedures, in-life assessments, biomechanics assessments, DEXA scans, and data analysis. The estimated timeline for the entire study is approximately weeks to 12-18 months, depending on the complexity and scope of the research. Interim nonclinical study reports are provided on an as-needed basis with clients requesting anywhere from weekly to monthly status reports. Communication needs for your team are flexible.

Study Budget

The cost of preclinical orthopedic CRO services can vary depending on several factors, such as the number of animals required, the complexity of surgical procedures, the duration of the study, and additional assessments needed. A detailed study budget is tailored to the specific requirements of each research project. It covers expenses related to animal procurement, housing, surgical equipment, anesthesia, imaging modalities, and data analysis. The study budget typically varies based on individual project specifications.

Orthopedic Bone Disease Animal Model Selection

Animal models play a vital role in preclinical orthopedic studies. The selection of appropriate animal models is based on the specific orthopedic disease being investigated and the suitability of the animal species. Commonly used animal models include mice, rats, rabbits, dogs, and non-human primates. The sample size is determined based on statistical analysis and power calculations to ensure meaningful results. Generally, a minimum of 6-12 animals per group is recommended to achieve statistical significance. This is entirely dependent on the endpoint analysis.

Nonclinical Orthopedic Surgical Procedures

Surgical procedures are conducted to induce orthopedic disease models or simulate conditions relevant to human orthopedic diseases. These procedures may include fracture induction, joint destabilization, ligament or tendon injury, or implantation of orthopedic devices. The surgeries are performed by experienced surgeons following strict aseptic techniques to minimize the risk of infection and ensure accurate modeling of the targeted orthopedic condition.

In-Life Assessments for Orthopedic Research

In-life assessments are conducted throughout the study to monitor the progression of orthopedic diseases, evaluate treatment efficacy, and assess safety parameters. These assessments may include pain scoring, gait analysis, range of motion measurements, radiographic evaluations, and functional testing. Regular monitoring and data collection allow researchers to track disease progression and treatment response accurately.

Dual-Energy X-ray Absorptiometry (DEXA)

DEXA scans are utilized to assess bone mineral density and bone quality in preclinical orthopedic studies. This non-invasive imaging technique provides valuable information about the effects of pharmaceutical drugs on bone health and the potential for treating bone diseases. DEXA scans can measure bone mineral density, bone mineral content, and body composition, aiding in the evaluation of drug efficacy and the identification of potential adverse effects.

Biomechanics Assessments

Biomechanical assessments play a crucial role in evaluating the mechanical properties and performance of orthopedic devices or treatment strategies. These assessments involve the measurement of various parameters, such as load-bearing capacity, stiffness, range of motion, and stress distribution. Specialized equipment, such as biomechanical testing machines, force plates, and motion capture systems, are utilized to quantify the biomechanical properties of the tested orthopedic interventions.

The Anilocus Approach to Orthopedic CRO Services

Preclinical orthopedic CRO services play a vital role in the discovery and development of pharmaceutical drugs for orthopedic applications. We want your team to have a comprehensive overview of the nonclinical animal experimental plan for animal studies including study design, timeline, budget considerations, animal model selection, surgical procedures, in-life assessments, biomechanics assessments, and the use of DEXA scans. With our team, your preclinical research endeavours are customizable and flexible as your specific needs change.

By following a systematic approach, our team of scientists can ensure the efficacy and safety assessment of the preclinical stage of your orthopedic drug development. Let’s collaborate to advance your drug product and orthopedic disease research.


  1. Sánchez-Duffhues G, Hiepen C. Human iPSCs as Model Systems for BMP-Related Rare Diseases. Cells. 2023;12(17):2200. Published 2023 Sep 2. doi:10.3390/cells12172200.
  2. Stein M, Elefteriou F, Busse B, et al. Why Animal Experiments Are Still Indispensable in Bone Research: A Statement by the European Calcified Tissue Society. J Bone Miner Res. 2023;38(8):1045-1061. doi:10.1002/jbmr.4868.
  3. Rios JL, Sapède D, Djouad F, et al. Animal Models of Osteoarthritis Part 1-Preclinical Small Animal Models: Challenges and Opportunities for Drug Development. Curr Protoc. 2022;2(11):e596. doi:10.1002/cpz1.596.
  4. Lorenz J, Grässel S. Experimental osteoarthritis models in mice. Methods Mol Biol. 2014;1194:401-419. doi:10.1007/978-1-4939-1215-5_23.