Joel Ferri

Key takeaways

Joel Ferri belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Joel Ferri to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Joel Ferri from memory before moving on to harder problems.

Reference excerpt

Joel Ferri (born 10 August 1959) is a French stomatologist, oral and maxillofacial surgeon, academic and author. He is the chairman and head of the Department of Oral and Maxillofacial Surgery at the Lille Medical School. Ferri is most known for his contributions to stomatology and maxillofacial surgery outcomes, with a special involvement in bone surgery (orthognathic surgery, bone reconstruction, TMJ prosthesis). Among his notable works are his publications in academic journals, including the American Journal of Orthodontics and Dentofacial Orthopedics and Journal of Oral and Maxillofacial Surgery as well as an edited book titled Preprosthetic and Maxillofacial Surgery: Biomaterials, Bone Grafting and Tissue Engineering.

Education Ferri earned his medical degree from Nantes University in 1990. Additionally, he acquired a Specialized Diploma in Stomatology and Maxillofacial Surgery, along with a diploma in Facial and Neck Surgery. Subsequently, in 1996, he successfully completed his Ph.D.

Career Ferri is Professor Delaire’s pupil’s. From him he learned the rules of dentofacial orthopedics and orthodontics. Therefore, understanding the mechanisms of craniomaxillofacial growth and balance, associated with his strong surgical background, he developed an original approach to orthognathic surgery and maxillofacial bone surgery. Ferri was appointed as a professor in the Department of Oral and Maxillofacial Surgery at the University of Lille in 1997. From 2004 to 2008, he served as the president of the International Bone Research Association and as the president of the French Society of Stomatology and Maxillofacial Surgery in 2011. In 2022 as a result of his involvement of the head and neck malformations he was admitted as a member of the Undiagnosed Disease Network International (UDNI). He was admitted as a member of the European Society of TMJ Surgeons (ESTMJS) and was appointed president of this society in 2017. Moreover, he has been serving as the chairman and head of the Department of Oral and Maxillofacial Surgery at the Lille medical school since 1997. Ferri is the founding member of IAOMM (international Association of Oral and Maxillofacial Medicine)

Research Ferri's early research was focused on the bone of the maxillo-facial area. He conducted a retrospective study comparing the advantages and disadvantages of mandibular reconstruction using a fibula free flap versus other techniques. The study found that while the fibula flap offers benefits like bone length and low donor site morbidity, it may not be suitable for large soft tissue defects, with the conclusion that it is satisfactory for defects over 20 cm in size. While investigating the relationship between the fiber-type composition of the masseter muscle and different bite patterns in individuals undergoing surgical correction of malocclusion, his 2005 research revealed significant associations between muscle composition and vertical bite characteristics, particularly in Class III subjects. In the same year, through his research, he presented a surgical protocol utilizing bimaxillary advancement and adjunctive procedures for the treatment of obstructive sleep apnea syndrome (OSAS) in patients affected by facial or mandible retrusion, demonstrating a high success rate in reducing the apnea/hypopnea index and improving patient outcomes. Ferri's 2010 work examined the impact of orthognathic surgery on temporomandibular joint (TMJ) disorders, finding that while the surgery significantly reduces TMJ symptoms in patients with pre-operative symptoms, there is a risk of new onset of TMJ symptoms post-surgery, albeit with a low occurrence rate. In 2011, he co-edited the book titled Reprosthetic and Maxillofacial Surgery: Biomaterials, Bone Grafting and Tissue Engineering, wherein he provided a comprehensive overview of preprosthetic and maxillofacial surgery, focusing on bone grafting, reconstructive surgery, and tissue engineering to enhance dental implant success and patient rehabilitation. His 2014 work with Andreas Neff and others evaluated treatment strategies for mandibular condylar fractures, finding a growing consensus among experts favouring open reduction with internal fixation (ORIF) as the gold standard, especially for displaced fractures, with considerations for endoscopic approaches and pediatric cases. In 2016, he reported a case of osteochimionecrosis on a fibula flap transferred for mandibular reconstruction, demonstrating that the transferred bone behaved similarly to the original one, thereby proving that environmental factors dictate bone behavior and pathophysiology regardless of its original nature. His 2017 work was a retrospective study comparing recurrence rates of ameloblastoma following conservative and radical treatments, revealing a significantly higher recurrence rate in the conservative treatment group, suggesting treatment should be tailored based on tumor characteristics and patient factors. More recently in 2022, he explored the regeneration potential of bone substitutes using a rabbit model with two different types of critical-sized defects, validating the model for calvaria defects but not for mandibular defects, and suggesting further research to improve mandibular defect design.

Bibliography

Books Ferri, Joël; Hunziker, Ernst B., eds. (2011). Preprosthetic and Maxillofacial Surgery: Biomaterials, Bone Grafting and Tissue Engineering. Elsevier. ISBN 978-0-85709-242-7.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Joel Ferri

Start with the simplest possible case. Write down what Joel Ferri claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Joel Ferri before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Joel Ferri ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Joel Ferri

In research: Joel Ferri appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Joel Ferri in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Joel Ferri is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1959 births, French academics, French surgeons, so understanding it makes those chapters shorter.
In everyday life: Look for Joel Ferri outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study Joel Ferri in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Joel Ferri means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Joel Ferri out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Joel Ferri in simple terms?

Joel Ferri (born 10 August 1959) is a French stomatologist, oral and maxillofacial surgeon, academic and author. He is the chairman and head of the Department of Oral and Maxillofacial Surgery at the Lille Medical School.

Why does Joel Ferri matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Joel Ferri?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Joel Ferri.