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Effect of Teriparatide on Fracture Healing in Patients With Incomplete Atypical Femur Fractures

University Health Network, Toronto logo

University Health Network, Toronto

Status and phase

Completed
Phase 3

Conditions

Non Displaced Atypical Femoral Fractures

Treatments

Other: Placebo
Biological: Teriparatide 20 mcg

Study type

Interventional

Funder types

Other
Industry

Identifiers

NCT01896011
12-0170
Control # 164050 (Registry Identifier)

Details and patient eligibility

About

Atypical femur (thigh bone) fractures (AFFs) are uncommon low-trauma fractures which often occur without warning, are highly debilitating, and are slow to heal. As physicians learn more about them, AFFs are increasingly being identified prior to a total break. However, there's no evidence on the best way to treat these non-displaced AFFs. One option is teriparatide, an osteoporosis medication that can build new bone. Investigators will conduct a double blind randomized placebo controlled trial to examine whether teriparatide use in AFF patients with an incomplete break will help accelerate fracture healing and prevent surgical intervention. Co-primary outcomes include change in WOMAC scores from baseline to 12 months and number of participants requiring surgical intervention at 12 months. Investigators will recruit 60 women and men over the age of 30 who have experienced an incomplete AFF. Participants will be randomly assigned to either teriparatide (20 mcg/day) or placebo (using an identical injection pen) for up to 2 years. As AFFs are highly debilitating, a trial examining the use of Teriparatide in this population is urgently needed.

Enrollment

34 patients

Sex

All

Ages

30 to 100 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

i. Female or male; ii. Over the age of 30; iii. Experienced an incomplete AFF that satisfies the diagnostic criteria as set forth by the American Society for Bone and Mineral Research (ASBMR) International Task Force on AFFs:

  1. Atraumatic or low trauma incomplete stress fractures, defined as fractures sustained with minimal force, such as a fall from standing height;
  2. From distal to the lesser trochanter to proximal to the supracondylar flare along the femoral shaft.
  3. Radiographic confirmation of AFF features is required for a definitive diagnosis. Incomplete AFF features include cortical thickening, cortical beaking, and lucency line. Patients with cortical beaking without lucency line can be included.

Exclusion criteria

i. Peri-prosthetic fractures, ii. High trauma fractures, iii. Pathological fractures secondary to metastases or metabolic bone diseases other than osteoporosis, iv. Fractures that are not confirmed by radiological investigations, v. Contraindication to use of teriparatide such as:

  1. pregnant or nursing mothers, or women who are planning on pregnancy within 1 year of completing teriparatide therapy,
  2. hypersensitivity to teriparatide,
  3. severe renal impairment,
  4. multiple myeloma,
  5. active cancer in past 5 years (other than non-melanoma skin cancer),
  6. primary hyperparathyroidism,
  7. hypercalcemia,
  8. Paget's disease or other conditions that may increase the risk for osteosarcoma,
  9. Prior radiation therapy involving the skeleton, vi. Concomitant use of other osteoporosis therapies including bisphosphonates or denosumab (except calcitonin).

AFF patients with complete fractures on the contralateral side or patients with secondary osteoporosis will not be excluded.

Trial design

Primary purpose

Treatment

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Triple Blind

34 participants in 2 patient groups, including a placebo group

Teriparatide 20 mcg daily
Active Comparator group
Description:
Teriparatide (Forteo) 20 mcg daily by injection pen for 12-24 months
Treatment:
Biological: Teriparatide 20 mcg
Placebo
Placebo Comparator group
Description:
Placebo injection pen identical to active drug injection pen
Treatment:
Other: Placebo

Trial contacts and locations

1

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Data sourced from clinicaltrials.gov

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