Clin Case Rep. 2019;7:2331–2335. | 2331 wileyonlinelibrary.com/journal/ccr3 1 | INTRODUCTION High success rate has been reported regarding the use of os- seointegrated dental implants for the rehabilitation of fully edentulous and partially edentulous jaws as well as replace- ment of a single missing tooth in the long‐term. 1 Systemic factors may influence the healing of bone around dental im- plants. Nevertheless, despite a reduced success rate caused by unfavorable systemic conditions, they may not always be con- sidered as absolute contraindications for bone augmentation and placement of dental implants. 2 The implant placement and consequently an adequate functional prosthetic rehabili- tation in the maxillary molar region require further attention, because of potential bone quality and anatomical structure issues, related to masticatory pattern and occlusal load entity. The reabsorption process, in edentulous posterior maxillary regions, could determine insufficient vertical dimensions for the implant positioning, often requiring additional surgical procedures such as different techniques for maxillary sinus floor augmentation. Several bone graft materials have been used over time for sinus maxillary augmentation. 3 Guillain‐Barre syndrome (GBS) is an immune‐mediated disorder of the peripheral nervous system, triggered by either infectious or noninfectious factors. 4 It is the most common form of acute flaccid paralysis occurring at any age. The in- cidence of GBS increases with age after 50‐year old from 1.7/10 000/y to 3.3/100 000/y. 5 Controlled epidemiological studies have reported that GBS is associated with infection with Campylobacter jejuni in addition to viruses, including cytomegalovirus and Epstein‐Barr virus. 6 This lethal syn- drome is characterized by muscle weakness and paralysis starting in the lower extremities and progress in an ascending fashion to the gastrointestinal and respiratory muscles and upper limbs. 7 There are no strong clinical trials with respect to dental implant placement guidelines in patients with GBS, and this treatment is not absolutely contraindicated in them. But some problems in dental implant treatment of patients with GBS, as well as the major precautions are noticed below: Received: 14 April 2019 | Revised: 20 August 2019 | Accepted: 23 August 2019 DOI: 10.1002/ccr3.2485 CASE REPORT Maxillary sinus floor augmentation and simultaneous dental implant placement in a patient with Guillain‐Barre syndrome: A case report Fardin Faraji 1 | Mojtaba Bayani 2 | Maryam Jafarpour 3 | Fateme Abdolalian 2 This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. © 2019 Arak University of Medical Sciences. Clinical Case Reports published by John Wiley & Sons Ltd. 1 Department of Neurology, School of Medicine, Arak University of Medical Sciences, Arak, Iran 2 Department of Periodontics, School of Medicine, Arak University of Medical Sciences, Arak, Iran 3 Dentist, Private Practice, Arak, Iran Correspondence Mojtaba Bayani, Department of Periodontics, School of Dentistry, Arak University of Medical Sciences. Arak, Iran. Email: mbayani@mail.com Funding information All parts of this presentation were self‐ funded. Abstract Dental implant placement in patients with Guillain‐Barre syndrome could be accom- plished, and it may turn into a successful treatment for edentulous sites and function- ally stabilized for long life. However, a proper patient selection, accurate medical consultation with physician, atraumatic surgery, and other important cautions should be considered. KEYWORDS dental implant, Guillain‐Barre syndrome, maxillary sinus augmentation, osseointegration