Condylar Head Operative or Conservative 1, Randomised Controlled Trial (CHOC1)

  • End date
    Jan 1, 2026
  • participants needed
  • sponsor
    Oxford University Hospitals NHS Trust
Updated on 17 October 2022
Accepts healthy volunteers


The condylar head is the part of the lower jaw which forms the joint. Displaced fractures of this area are uncommon but can cause problems with function, such as chewing, if not treated effectively. The medical literature does not have a clear consensus on whether these should be treated operatively (with surgery to reduce and fix the fracture) or conservatively (with advice and exercise and no surgery). The investigators propose a randomised controlled trial comparing the outcome of the operative or conservative treatment of condylar head fractures of the mandible, primarily with regards to patient related outcome measures of mandibular function, and secondarily objective measures of mandibular movement, function and symptoms to try and provide a clearer answer as to the best way of managing them.


The current medical literature provides conflicting evidence as to the benefits of operative or conservative management of displaced condylar head fractures. Whilst conservative treatment has few risks in itself, most of the evidence would suggest that outcomes are not quite as good as operative management. Operative treatment has complications that are not presented by conservative treatment, such as the risk of infection or facial nerve injury and therefore it is important to demonstrate that such treatment has sufficient benefits to merit it's consideration, and to properly inform the patients about the benefits and risks of treatment. When patients present with these injuries it is currently difficult to provide them with good evidence for them to make an informed decision with, as to whether to undergo surgery or not. At present the patient is expected to make a decision as to whether to have surgery or not based on this limited knowledge, and it is the investigator's experience with consulting these patients and the questions they asked that has demonstrated the need for and guided the design of the trial focusing on a patient related outcome quality of life measure, rather than the common objective measures.#

The main purpose of undertaking this RCT is to directly compare the results of operative and conservative management focusing on an outcome which is determined by the patients perception of their function and quality of life rather than purely objective measurements. A randomised controlled trial would provide the strongest level of evidence to support future care decisions and any patient with a unilateral fracture would be considered for inclusion if they can give informed consent and are able to complete the PROM questionnaire at the necessary time points. Exclusion criteria are limited, but include bilateral fractures because these are less common and the results may not be directly comparable.

The trial design has been kept simple and adds no significant burden to patients as all aspects of care and follow up are the same as the current standard of care apart from the completion of the questionnaire, which can be completed relatively quickly during participant's clinic appointments. The investigators are experienced surgeons in this field and able to fully answer any questions from patients with regards to the trial, and to risks and benefits of either treatment option. Neither has any conflict of interest in undertaking the trial.

All trial data will be handled confidentially in line with good governance procedures, and will be monitored by appropriate persons from the trial sponsors.

Condition Condylar Process of Mandible Open Fracture
Treatment Open Reduction and Internal Fixation
Clinical Study IdentifierNCT03264196
SponsorOxford University Hospitals NHS Trust
Last Modified on17 October 2022


Yes No Not Sure

Inclusion Criteria

Participant is willing and able to give informed consent for participation in the trial
Male or Female, aged 18 years or above
Be in good health - suitable for general anaesthesia for surgical treatment
Willing to allow his or her General Practitioner and consultant, if appropriate, to be notified of participation in the trial
Unilateral condylar head fracture with or without other mandibular body or angle fractures, or other maxillofacial injuries
Condylar head fracture displaced by at least 2 mm measured on coronal or sagittal CT scan
In the Investigator's opinion, is able and willing to comply with all trial requirements

Exclusion Criteria

Undisplaced condylar head fractures, or displaced less than 2 mm on coronal or sagittal CT
Bilateral condylar head fractures
Pre-existing congenital or acquired pathology of the ipsilateral or contralateral temporomandibular joint - including but not limited to ankylosis, inflammatory arthropathy, idiopathic condylar resorption
Pregnancy (increased risk of joint pain and laxity)
Clear my responses

How to participate?

Step 1 Connect with a study center
What happens next?
  • You can expect the study team to contact you via email or phone in the next few days.
  • Sign up as volunteer  to help accelerate the development of new treatments and to get notified about similar trials.

You are contacting

Investigator Avatar

Primary Contact


Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

Learn more

If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

Learn more

Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

Learn more

Similar trials to consider


Browse trials for

Not finding what you're looking for?

Every year hundreds of thousands of volunteers step forward to participate in research. Sign up as a volunteer and receive email notifications when clinical trials are posted in the medical category of interest to you.

Sign up as volunteer

user name

Added by • 



Reply by • Private

Lorem ipsum dolor sit amet consectetur, adipisicing elit. Ipsa vel nobis alias. Quae eveniet velit voluptate quo doloribus maxime et dicta in sequi, corporis quod. Ea, dolor eius? Dolore, vel!

  The passcode will expire in None.

No annotations made yet

Add a private note
  • abc Select a piece of text from the left.
  • Add notes visible only to you.
  • Send it to people through a passcode protected link.
Add a private note