Olivier Lieger

• Prof Dr med Dr med dent
• Senior Surgeon at Clinic for Oral and Maxillofacial Surgery

There is ongoing discussion about patient-specific implants (PSI) to reconstruct orbital defects. Although PSI offer excellent clinical outcome, they are expensive. Subsequently, their routine application is not indicated. The purpose of this study was to estimate the frequency of implant malposition and revision procedures after primary orbital re...

Purpose: Establishing the symmetry of intraindividual orbital volumes is crucial for radiologic assessment, preoperative planning, and postoperative outcome evaluation. However, no reliable method exists to measure orbital volume because of problems in defining the bony boundaries of the orbit. Therefore, the purpose of this study was to propose a...

Purpose: Postoperative radiographic examinations are the gold standard in maxillofacial surgery, except in orbital reconstruction. Therefore, the purpose of this study was to estimate the frequency of implant malposition and revision operation after orbital repair. Materials and methods: This retrospective cohort study was conducted in a level I...

Objectives: Metal artefacts present challenges to both radiologists and clinicians during post-operative imaging. Such artefacts reduce the diagnostic effectiveness of computed tomography (CT) scans and mask findings that could be vital for patient management. Thus, a powerful artefact reduction tool is necessary when imaging patients with metal i...

To compare the initial stability and stability after fatigue of three different locking systems (Synthes(®), Stryker(®) and Medartis(®)) for mandibular fixation and reconstruction. Standard mandible locking plates with identical profile height (1,5 mm), comparable length and screws with identical diameter (2,0 mm) were used. Plates were fixed with...

The aim of this study was to evaluate the difference between the effect of a 5-day and a 1-day postoperative course of antibiotics on the incidence of infection after midfacial fractures. A total of 98 patients with displaced Le Fort or zygomatic fractures that required operation were randomly assigned into 2 groups, both of which were given amoxic...

The goal of this study was to evaluate the influence of the duration of postoperative antibiotics (1 day vs. ≥ 5 days) on wound infections following surgical treatment of facial fractures. Three hundred thirty-nine patient case histories with a total of 498 fractures were reviewed retrospectively with regard to infections occurring within a 6-month...

The aim of this study was to evaluate the difference between a 5-day and a 1-day postoperative course of antibiotic on the incidence of infection after mandibular fractures involving the alveolus. Sixty-two patients with fractures of the mandible involving the dentoalveolar region were randomly assigned to 2 groups, both of which were given amoxici...

The aim of this study was to evaluate the difference between the effects of a 5-day and a 1-day course of antibiotics on the incidence of postoperative infection after displaced fractures of the orbit. A total of 62 patients with orbital blow-out fractures were randomly assigned to two groups, both of which were given amoxicillin/clavulanic acid 1....

The purpose of this study was to share our clinical experience in the use and accuracy of a newly designed, low-profile titanium mesh (Modus OPS 1.5; Medartis, Basel, Switzerland) for primary internal orbital reconstruction. Observational study. This study was conducted at the Department of Cranio-Maxillofacial Surgery at the University Hospital of...

Bisphosphonates (BPs) are powerful drugs that inhibit bone metabolism. Adverse side effects are rare but potentially severe such as bisphosphonate-related osteonecrosis of the jaw (BRONJ). To date, research has primarily focused on the development and progression of BRONJ in cancer patients with bone metastasis, who have received high dosages of BP...

The two major causative factors for mandibular fractures, as stated in the literature, are either interpersonal violence or motor vehicle accidents. The purpose of this study was to describe epidemiological trends of mandibular fractures in Switzerland. A special emphasis was directed towards the potential impact of socio-economic standards on the...

To assess the long-term clinical and radiologic findings after insertion of a bioresorbable polylactide plates P(L/DL)LA 70/30 implant (PolyMax) in the repair of orbital floor and wall defects, with special focus on stability and clinical signs of foreign-body reaction. Forty-six patients who had orbital blowout fractures with at least 1.5-cm(2) bo...

To evaluate a new surgical method, using calvarial bone graft combined with a wedge of irradiated homologous costal cartilage, for the revision repair of posttraumatic enophthalmos. This retrospective study was performed from January 1, 2003, through December 31, 2007. Eight patients were diagnosed as having unilateral posttraumatic enophthalmos. A...

Tuberculosis (TB) is a frequent health problem. The prevalence of extrapulmonary TB has increased in the last couple of years. Head and neck tuberculosis forms nearly 10% of all extrapulmonary manifestations of the disease. TB of the temporomandibular joint (TMJ) is rare; only a few cases have been reported. The clinical appearance of TB infection...

To evaluate the use of computer-assisted designed and manufactured (CAD/CAM) orbital wall and floor implants for late reconstruction of extensive orbital fractures. We performed a retrospective data review on 29 patients treated for extensive orbital fractures from January 1, 1997, through December 31, 2007, at the University College London Hospita...

OBJECTIVE: To evaluate a new surgical method, using calvarial bone graft combined with a wedge of irradiated homologous costal cartilage, for the revision repair of posttraumatic enophthalmos. METHODS: This retrospective study was performed from January 1, 2003, through December 31, 2007. Eight patients were diagnosed as having unilateral posttrau...

The aim of the study was to investigate the association between dental injuries and facial fractures. We performed a prospective study of 273 patients examined at a level 1 trauma center in Switzerland from September 2005 until August 2006 who had facial fractures. Medical history and clinical and radiologic examination findings were recorded to ev...

PURPOSE: The aim of the study was to investigate the association between dental injuries and facial fractures. MATERIALS AND METHODS: We performed a prospective study of 273 patients examined at a level 1 trauma center in Switzerland from September 2005 until August 2006 who had facial fractures. Medical history and clinical and radiologic examinat...

The purpose of this study was to investigate the knowledge of school teachers about the emergency management of dental trauma, after an educational poster campaign. A total of 1000 questionnaires were sent to 100 schools in the area where the poster had been distributed. This was compared to another 100 schools (1000 questionnaires) in an area, Whe...

Retaining effective swallowing is a key element when optimising outcomes in the management of head and neck cancer. We report the functional swallowing outcomes for a cohort of 31 individuals with advanced oral and oropharyngeal cancer who underwent free or pedicled flap reconstruction of surgical defects. Swallowing was assessed pre and immediatel...

A case is presented of a 14-year-old boy with aneurysmal bone cyst of the tuberculum articulare of the temporomandibular joint (TMJ). This disease rarely involves the skull, and involvement of temporal bone is even more rare. To our knowledge, only 22 cases have been reported in the literature. This is the first case of aneurysmal bone cyst of the...

Arch bars still play an important role in the treatment of severely dislocated and comminuted fractures as well as in injuries where functional treatment is required. In an effort to optimise stability and reduce operation time, we developed a new titanium arch bar for use in maxillomandibular fixation. This report is an update on old and current m...

Epidermal growth factor (EGF) is excreted in a high concentration in human saliva and modulates the growth and differentiation of various cancer cells. To elucidate the molecular mechanisms by which EGF affects oral cancer growth and invasion, we analyzed the Matrigel invasion activity of the cultured oral cancer cell line. Cells grown under the in...

A retrospective evaluation was undertaken of eyelid reconstruction with amniotic membrane or oral mucosal membrane transplantation in patients with lower lid cicatricial entropion after orbital surgery. Seven patients (four women) were treated with a scar tissue dissection and an amniotic membrane or mucosal membrane transplantation between 2003 an...

BACKGROUND: A retrospective evaluation was undertaken of eyelid reconstruction with amniotic membrane or oral mucosal membrane transplantation in patients with lower lid cicatricial entropion after orbital surgery. PATIENTS AND METHODS: Seven patients (four women) were treated with a scar tissue dissection and an amniotic membrane or mucosal membra...

Whipple's disease is a systemic disorder caused by an infection with a gram-positive bacillus, Tropheryma whipplei. Almost every organ system can be affected in Whipple's disease, resulting in varying clinical symptoms. As far as we are aware, this report of a 61-year-old male is the first presenting with a periorbital manifestation of the disease,...

The aim of this study was to assess long-term changes in position of soft tissue landmarks following mandibular advancement and setback surgery. Twenty-seven patients (14 women, 13 men; mean age, 36 years) who had undergone either mandibular advancement (15 patients) or setback surgery (12 patients), were available for a long-term follow-up an aver...

Synovial chondromatosis of the temporomandibular joint (TMJ) is a rare, benign, monoarticular arthropathy characterized by formation of cartilaginous and osteocartilaginous nodules in the synovial membrane and joint space (loose bodies). Synovial chondromatosis commonly affects larger joints of the body, such as the knee, elbow, wrist, shoulder, an...

The aim of this follow-up study was to evaluate the clinical usefulness of a new type of 3-dimensional (3D) miniplate for open reduction and monocortical fixation of mandibular angle fractures. In 20 consecutive patients, noncomminuted mandibular angle fractures were treated with open reduction and fixation using a 2 mm 3D miniplate system in a tra...

The objective of the present study was to measure the occurrence of orofacial and cerebral injuries in different sports and to survey the awareness of athletes and officials concerning the use of mouthguards during sport activities. Two hundred and sixty-seven professional athletes and 63 officials participating in soccer, handball, basketball and...

The aim of this study was to compare objectively and subjectively the results after temporalis tendon and microneurovascular transfer for reanimation of the paralysed face. For the objective analysis, measurements of the distances between static and dynamic points in three-dimensional space were performed at rest and during smiling. The patients we...