Idiopathic dilatation of the submandibular gland duct.

Lithiasis and stenosis may cause salivary duct dilatation due to the increased pressure in the duct upstream of the obstruction. Idiopathic dilatations, also called megaducts, with no associated increase in pressure, have only been described in the parotid gland. The aim of this study was to describe the characteristics of submandibular duct dilatation unrelated to lithiasis, stenosis, or an imperforate duct, to report the existence of submandibular megaducts. This retrospective single-centre study included patients treated at La Conception University Hospital, Marseille, France, between 2007 and 2019. Patients with submandibular duct dilatation of ≥4 mm confirmed by magnetic resonance imaging sialography (sialo-MRI), who also underwent sialendoscopy to identify any associated stenosis, were included. Patients with lithiasis, stenosis, an imperforate ostium, or a history of trauma or surgery to the floor of the mouth were excluded. Five patients (three female, two male) aged 30-76 years with idiopathic duct dilatations in nine submandibular glands were included. The most commonly reported symptoms were submandibular swelling, pruritus, and discomfort, mostly outside mealtimes. Recurrence of symptoms after treatment was frequent. This study is novel in describing submandibular megaducts as opposed to dilatation caused by high pressure associated with stenosis, with confirmation by sialo-MRI and sialendoscopy.

Significant decrease of facial cellulitis admissions during COVID-19 lockdown in France: A multicentric comparative study.

During the 2020 coronavirus pandemic, a lockdown was imposed in France during the first wave. An apparent decrease in incidence of cellulitis of odontogenic origin was noticed then. This study aimed to compare the incidence of cellulitis during this extraordinary period with the same period in 2018 and 2019, based on retrospective multicentric data. All maxillofacial surgery departments in French public hospitals were contacted. Responders were asked to include all patients admitted for the surgical drainage of a head and neck abscess of odontogenic origin during the first 2020 lockdown period, and in a similar time frame in 2018 and 2019 (control group), based on screening the French diagnostic and therapeutic classification of medical acts. We report a 44% significant nationwide decrease in the incidence of admissions for cellulitis. There were 187 patients in 2020 for 334 and 333 patients in 2018/2019 respectively. The reasons to explain this finding are hypothetical (organizational reasons leading to earlier management, patients' fear to seek for medical management, usual excess in surgical indications or concomitant decrease of non-steroidal anti-inflammatory drugs delivery). Whatever the explanation, it would be of great interest to find it out in order to improve the prevention of cellulitis.

Impact of the COVID-19 lockdown on the epidemiology of maxillofacial trauma activity: a French multicentre comparative study.

The coronavirus disease 2019 (COVID-19) outbreak has had a major impact on medical and surgical activities. A decline in facial trauma incidence was noticed during the lockdown period. The aim of this study was to evaluate the decline in maxillofacial trauma in France during this particular period. A retrospective multicentre comparative study was initiated in 13 major French public hospital centres. The incidence of facial trauma requiring surgery during the first month of lockdown was compared to that during equivalent periods in 2018 and 2019. Differences in the types of trauma were also analysed. Thirteen maxillofacial departments participated in the study. A significant decline in maxillofacial trauma volumes was observed when compared to equivalent periods in 2018 and 2019 (106 patients compared to 318 and 296 patients, respectively), with an average reduction of 65.5% (P=0.00087). The proportion of trauma due to sports and leisure was reduced when compared to reports in the literature. As a consequence, in the context of a pandemic, the material and human resources related to this activity could be reallocated to the management of other pathologies that cannot be postponed.

Facial pressure ulcers in COVID-19 patients undergoing prone positioning: How to prevent an underestimated epidemic?

Prone positioning is an adjuvant therapy used to treat COVID-19 pneumonia complicated by acute respiratory distress syndrome. However, prolonged pressure on facial skin at the level of the bony structures may be responsible for facial pressure ulcers. In the context of severe COVID-19 pneumonia, we hypothesized that hypoxemia, microvascular injury and thrombosis can increase the risk of pressure ulcers. We described two cases in order to emphasize the risk of facial pressure ulcers as a result of prone positioning, so as to discuss their physiopathology and highlight the importance of appropriate preventive measures.

A closer examination of the retromandibular subparotid approach: Surgical technique and anatomical considerations with a special focus on the angular tract. A cadaveric study and a technical note.

Several approaches have been described for the surgical management of condylar fractures. Although there is no consensus on the best surgical technique, the retromandibular approach appears to be the most common reported in the literature. This approach is traditionally performed via a retromandibular incision and a transparotid route. An alternative technique to this approach entails a subparotid passage with the gland lifted antero-superiorly and no intraglandular dissection. This modification has been designed to reduce the risk of direct injury of the facial nerve branches as well as the risk of post-operative salivary fistula. The purpose of this technical report was to provide a "step-by-step" description of the retromandibular subparotid approach as performed in our department with particular emphasis on the relevant anatomically critical structures.

Facial necrotising fasciitis following rhytidectomy.

Rhytidectomy is the most common surgical procedure used to rejuvenate the appearance of the aging face and neck. Necrotising fasciitis is a rapidly progressing, life-threatening, bacterial infection of the skin, the subcutaneous tissue, and the fascia. We report a case of necrotising fasciitis of the face caused by a group A streptococcal infection after rhytidectomy on a healthy female patient. An abscess on her hand that had been caused by an infection related to a venous catheter had provided a potential entry for the pathogen, and treatment combined both surgical debridement and antibiotics. The operation had resulted in large tissue losses around the ears, which we treated by healing by second intention.

Botulinum toxin for ductal stenosis and fistulas of the main salivary glands.

This study was performed to present the authors' experience with botulinum toxin therapy for salivary stenosis and salivary fistula in terms of the procedure, dosage, effectiveness, and complications. A retrospective study of all patients treated in the maxillofacial surgery department for salivary stenosis or fistula from January 2014 to September 2018 was performed. Intraglandular injections of incobotulinumtoxinA (Xeomin) were utilized. The frequency of relapse and the pain recorded before injection and at 3 months after each injection or fistula resolution were assessed. Swallowing dysfunction or any diffusion of toxin into the facial muscles was recorded. This study included 22 patients (mean age 53 years). Botulinum therapy was indicated for parotid duct stenosis in 14 patients, submandibular duct stenosis in four patients, and parotid fistula in four patients. The frequency of relapse (P = 0.0001) and pain level (P = 0.0001) decreased after botulinum therapy. The average duration of the botulinum effect was 4.50±2.00 months after the first injection. No complication was observed. Botulinum therapy with 100 IU of Xeomin proved effective at resolving salivary fistula. Botulinum therapy is an effective treatment for symptoms of salivary duct stenosis in patients for whom minimally invasive procedures have failed. Botulinum therapy can also be used for the treatment of salivary fistulas.

The Stensen's duct line: A landmark in parotid duct and gland injury and surgery. A prospective anatomical, clinical and radiological study.

INTRODUCTION: The parotid duct (PD) is often involved in parotid gland diseases. A skin landmark could help the surgeon to locate its position. The parotid duct line (PDL) joins the tragus-antitragus point to the middle of the half upper lip. The aim of this study was to assess and scientifically validate this landmark. METHODS: A monocentric prospective anatomical, clinical and radiological study was conducted. Six fresh cadavers' PD were dissected. A subcutaneous flap was performed and the PD's position spotted by needle checking through the skin. 10 subjects with parotid obstructive symptoms were included for sialendoscopy, which light through the skin revealed the PDL's position. MRI was conducted on 20 PDs. The radiologist virtually drew the PDL and did a 3D reconstruction of the PD. The distance from the PDL to the PD was measured. RESULTS: Anatomical study: 2 PDs were on the PDL, 2 under and 2 over. Sialendoscopic study: 6 PDs were on the PDL (60%), 3 under and 1 over. MRI study: 13 over 20 PDs crossed the PDL (65%). Maximum mean distance from the PD was 10.44 mm [5.01-15.87] and minimum mean distance from the PD was 2.42 mm [0-5.75]. DISCUSSION: This study sought to assess the relevance of the PDL, which is not parallel to the PD that runs a «S-Shape¼ curve when crossing the PDL. It could be used when evaluating a potential ductal injury in trauma management and when locating proximal parotid lithiasis during sialendoscopy.

Mucoceles of the anterior ventral surface of the tongue and the glands of Blandin-Nuhn: 5 cases.

INTRODUCTION: Mucoceles are cystic diseases of the oral mucosa. The most common are ranula and mococeles of the lower lip. Blandin and Nuhn mucoceles, which develop at the ventral side of the tongue, are rare benign lesions. They are often misdiagnosed and sometimes confused with ranula. The recommended treatment is a complete surgical excision of the gland. PATIENTS AND METHODS: We describe 5 clinical cases managed in service between 2009 and 2016. Clinical cases are presented in order to detail their clinical history, paraclinical and treatment. RESULTS: The clinical appearance is a longitudinal swelling of the ventral surface of the tongue, parallel to the frenulum. The volume of the swelling is variable; it is normally around 30 × 10 mm. The paraclinical (ultrasound, CT, MRI, or ponction) could be performed. CT showed an cyst located on the ventral surface of the tongue, with liquid density. Blandin and Nunh mucocele were strictly anechogenic. MRI confirms the liquid content of this cyst (low T1signal, high T2signal and no post-contrast-enhanced). The resection of Blandin and Nuhn glands should respect the sublingual gland, the lingual nerve and the lingual veins in the mouth floor. CONCLUSION: This study demonstrates that Blandin and Nuhn mucoceles must be understood and recognised to propose complete excision of the Blandin and Nuhn gland and avoid recurrence.

Hooliganism and maxillofacial trauma: The surgeon should be warned.

INTRODUCTION: With more than 270 million spectators, football - or soccer - is the most popular sport in the world. International football events generate many risky situations, including hooliganism and are an opportunity to analyze the incidence and the particularities of associated trauma. We sought to underline the potential rapid and brutal increase in maxillofacial trauma during a world-class competition. MATERIAL AND METHODS: A retrospective multicenter study of the epidemiology of maxillofacial traumas during the UEFA 2016 Cup was conducted. All the medical data from each UEFA 2016 World Cup matches from 10 June 2016 to 10 July 2016 were collected. Only the maxillofacial traumas requiring a surgery under general anesthesia and a hospitalization were included. RESULTS: 11 patients from 3 different cities were included. The main etiology was interpersonal violence (7/11), followed by road accidents (3/11). Open reduction with internal fixation of a mandibular fracture was the most performed surgery (9/11). Patients were 18 to 50 year-old, with an average age of 30.6 years. DISCUSSION: This study underlines the violence of riots between "ultra" supporters during the 2016 UEFA cup. We noticed an upsurge of maxillofacial trauma severe enough to require a surgery under general anesthesia. Hooligan behaviors should be known by every practitioner dealing with trauma care, and may requires transitional adjustment of public health policy.

Development and validation of an optimized finite element model of the human orbit.

INTRODUCTION: The authors' main purpose was to develop a detailed finite element model (FEM) of the human orbit and to validate it by analyzing its behavior under the stress of blunt traumas. MATERIALS AND METHODS: A pre-existing 3D FEM of a human head was modified and used in this study. Modifications took into account preliminary research carried out on PubMed database. Data from a CT scan of the head were computed with Mimics® software to re-create the skull geometry. The mesh production, the model's properties and the simulations of blunt orbital traumas were conducted on Hyperworks® software. RESULTS: The resulting 3D FEM was composed of 640 000 elements and was used to perform blunt trauma simulations on an intact orbit. A total of 27 tests were simulated. Fifteen tests were realized with a metallic cylinder impactor; 12 tests simulated a hit by a closed fist. In all the tests conducted (27/27), the orbital floor was fractured. Fracture patterns were similar to those found in real clinical situations according to the buckling and hydraulic theories of orbital floor fractures. DISCUSSION: The similitude between the fracture patterns produced on the model and those observed in vivo allows for a validation of the model. This model constitutes, at the authors knowledge, the most sophisticated one ever developed.

Finite element analysis of the human orbit. Behavior of titanium mesh for orbital floor reconstruction in case of trauma recurrence.

INTRODUCTION: The authors' main purpose was to simulate the behavior of a titanium mesh implant (TMI) used to reconstruct the orbital floor under the stress of a blunt trauma. MATERIALS AND METHODS: The orbital floor of a previously validated finite element model (FEM) of the human orbit was numerically fractured and reconstructed by a simplified TMI. Data from a CT scan of the head were computed with MICMICS (Materialise, Louvain, Belgium) software to re-create the skull's geometry. The meshing production, the model's properties management and the simulations of blunt traumas of the orbit were conducted on HYPERWORKS® software (Altair Engineering, Detroit, MI, USA). Some of the elements of the orbital floor were selected and removed to model the fracture; these elements were duplicated, their characteristics being changed by those of titanium to create a TMI covering this fracture. A 3D FEM composed of 640,000 elements was used to perform 21 blunt trauma simulations on the reconstructed orbit. RESULTS: In 90.4% (19/21) of the tests conducted, the TMI, whether free from any bony attachment or screwed to the orbital rim, has tended to move in the orbit and/or to deform. DISCUSSION: In the event of traumatic recurrence, which is not rare, TMIs may deform in a "blow-in" motion and threaten intra-orbital structures.

Impact of antithrombotic treatment in orbital haematoma.

INTRODUCTION: Orbital haematomas threaten the visual prognosis, but no treatment guidelines have been proposed. Antithrombotics could affect their prognosis and treatment. This study aimed to evaluate the effect of antithrombotics in the management of orbital haematomas and to suggest a standardised protocol. MATERIAL AND METHODS: We conducted a retrospective study by sending a standardised questionnaire to 20 French maxillofacial surgery university departments to collect all the cases of orbital haematoma. RESULTS: Twenty-five cases from 10 centres were collected, including five patients treated with anticoagulant and one patient treated with dual antiplatelet. Antithrombotics increased the risk of amaurosis and ocular disorders significantly. Surgery was performed for 66.7% of patients treated with antithrombotic and for 89.5% of other patients. Surgical delay was longer in patients treated with antithrombotic. Surgical drainage was used in most of the cases, whereas canthotomy with inferior cantholysis was the least-used technique. CONCLUSION: Antithrombotics appear to worsen the functional prognosis of orbital haematomas. A surgical management of orbital haematoma in patients treated with antithrombotics is not contraindicated. Surgical delay must be shortened as much as possible. A lateral canthotomy with inferior cantholysis seems to be an appropriate solution.

Endodontic-related inferior alveolar nerve injuries: A review and a therapeutic flow chart.

INTRODUCTION: Inferior alveolar nerve (IAN) lesions related to endodontic treatments can be explained by the anatomical proximity between the apices of the mandibular posterior teeth and the mandibular canal. The aim of this article is to review the management of inferior alveolar nerve lesions due to endodontic treatments and to establish a therapeutic flow chart. METHODS: A review of publications reporting IAN damage related to endodontic treatment over the past 20 years has been conducted, using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses checklist; it combines an electronic search of the Pubmed® and Google Scholar® databasis. Forty-two full-text articles corresponding to 115 clinical cases have been selected. Two personal clinical cases were additionally reported. RESULTS: IAN lesions due to endodontic treatments require urgent management. Early surgical removal of the excess of endodontic material, in contact with the nerve allows the best recovery prognosis (72h). Beyond this delay, irreversible nervous lesions prevail and a medical symptomatic treatment, most of the time with pregabalin, must be/can be carried out. A delayed surgical procedure shows some good benefits for patients. However, the healing prognosis remains poorly predictable.

WITHDROWN: Osteonecrosis of the jaw in patients traited by denosumab for malignant bone disease: Descriptive study on 9 cases

Ahead of Print article withdrawn by publisher

Extracorporeal lithotripsy of salivary gland stone: A 55 patients study.

Sialolithiasis are the most frequent salivary gland disease, mainly affecting the submandibular gland. With the advent of minimally invasive techniques, total salivary gland removal should not be considered as the first-line treatment anymore. Extracorporeal Shock Wave Lithotripsy (ESWL) is an alternative to surgery preserving the gland. The objective of our retrospective study was to evaluate the efficiency of ESWL on pain and obstructive syndrome in patients suffering from sialolithiasis. The global result felt by the patients was also considered. All patients treated between October 2009 and July 2016 for sialolithiasis by ESWL in our department were included. They were divided into two groups according to the concerned gland: a parotid gland (PG) and a submandibular gland (SMG) group. Our retrospective telephone questionnaire consisted in 4 questions about their symptomatology before and after ESWL, including pain self-evaluation before and after treatment. They were finally asked to evaluate the global result of the ESWL treatment: excellent, good, mean, or poor. In total, 55 patients were included in this study, 38 patients in PG group and 17 patients in SMG group. We observed a decrease of pain and obstructive syndrom after ESWL procedure in both groups. Better results were found on the obstructive syndrome in the PG group. Very few side-effects were reported by patients. Given that it has very few side effects, ESWL can easily be considered as first line treatment for sialolithiasis to avoid heavier treatments such as surgery. It should be the first-line treatment for symptomatic parotid sialolithiases. The treatment of symptomatic submandibular sialolithiases depends on the topography of the lithiasis.