3D Boolean operations in virtual surgical planning.

Purpose: Boolean operations in computer-aided design or computer graphics are a set of operations (e.g. intersection, union, subtraction) between two objects (e.

Anatomical landmarks for maxillary nerve block in the pterygopalatine fossa: A radiological study.

Introduction: The aim of this study was to describe the anatomical landmarks for maxillary nerve block in the pterygopalatine fossa. The risk of injury to the skull base and maxillary artery was assessed.

Methods: This retrospective study was based on the analysis of 61 consecutive computed tomography angiographies obtained from patients suffering from different pathologies.

Upper cervical range of motion is impaired in patients with temporomandibular disorders.

Aims: Clinicians increasingly suggest assessment and treatment of the cervical spine in patients with temporomandibular dysfunction (TMD); however, few studies have investigated upper cervical spine mobility in people who suffer from TMD. The purpose of this study was to investigate whether patients with TMD pain (with or without headache) present with upper cervical spine impairment when compared with asymptomatic subjects.

Methodology: A single blind examiner evaluated cervical range of motion (ROM) measures including axial rotation during the flexion-rotation test (FRT) and sagittal plane ROM.

[Orthognathic mandibular osteotomy and condyle positioning: update and innovation].

The temporomandibular joints function in synergy with the dental occlusion within the manducatory system. Orthodontists and surgeons must take into account the condylar position since any problem related to positioning of the condyle could result in occlusal disorders including relapse and the risk of occurrence, decompensation or worsening of temporomandibular dysfunction. We wanted to answer three questions: What is the position of the condyle following orthognathic surgery? What benefit is there in repositioning the condyle? What means are available to check condylar position? Finally, in the light of the answers, we describe an innovative occlusal and condylar positioning device for mandibular osteotomies based on computer-assisted surgical planning techniques.

Sentinel lymph node biopsy for head and neck Merkel cell carcinoma: a preliminary study.

Introduction: A retrospective preliminary study assessed the feasibility of sentinel lymph node biopsy (SLNB) in the management of Merkel cell carcinoma (MCC) of the head and neck.

Patients And Methods: Twelve patients with stage I or II head and neck MCC underwent SLNB over a 4-year period.

Results: Only 1 of the 12 patients had a positive SLNB.

[Comparison between closure and absence of closure after removal of fully impacted mandibular third molar: a prospective randomized study].

Unlabelled: We prospectively and randomly assessed the absence of surgical wound closure on the patient's postoperative outcome when removing impacted mandibular third molars.

Material And Method: Patients were randomized in 2 groups: the "open group" (O) and the "closed group" (C). We considered the postoperative perimandibular edema, postoperative pain, and limitation of mouth opening at preoperative time, Day2, and Day7.

[When should an orthoptic evaluation be prescribed in the management of orbital floor fracture? A prospective study of 47 fractures].

Introduction: We evaluated the indication of orthoptic evaluation for the management of orbital floor fractures in a prospective series.

Material And Method: Forty-seven patients presenting with an orbital floor fracture were included in our prospective study. Consultations in orthoptics and maxillo-facial surgery were regularly carried out.

Surgical anatomy of the preauricular anteroparotid approach for mandibular condyle surgery.

Purpose: The different surgical approaches used to treat mandibular condyle fractures are carried out in the periparotid skin area and can lead to facial nerve injury. We conducted a preauricular and anteroparotid surgical approach. Our main aim was to show the anatomical relationship between this approach site and the facial nerve branches, and to define cutaneous landmarks to locate the extraparotid facial nerve branches.

Mandibular ridge expansion using a horizontal bone-splitting technique and synthetic bone substitute: an alternative to bone block grafting?

Purpose: Inadequate bone width in atrophic edentulous jaws is a challenge for successful oral rehabilitation with endosseous dental implants. The aim of this clinical study was to evaluate the effectiveness of a new method for ridge expansion with sagittal splitting using a new surgical device (Crest-Control Bone Splitting System, Meisinger) and to determine whether it is necessary to fill the expansion area with bone substitute to maintain the expanded bone volume.

Materials And Methods: During a 3-year period, a prospective study was performed in 32 patients (59% women, 41% men).

[Composite midfacial flap vascularized by the facial artery: a preliminary anatomic study].

Introduction: Extended facial tissue defects are difficult to reconstruct because of the anatomical and functional complexity of the area. Recently, composite facial allotransplantation was used for reconstruction. This could be performed because of specific facial blood supply and its facial and maxillary anastomoses.

[Absence of the musculocutaneous nerve and its distribution from median nerve: About two cases and literature review].

Musculocutaneous nerve arises mostly from the lateral cord of brachial plexus. Nevertheless, variations have been reported and, among them: the total absence of musculocutaneous nerve (from 1.4 to 15%), the absence of its passage through the coracobrachial muscle, its variable level of penetration as measured from the tip of the coracoid process, and its communicating branches with the median nerve.

[Tongue reconstruction with a bilateral infrahyoid flap innervated by Ansa Cervicalis after total glossectomy].

Introduction: Reconstruction after total glossectomy remains a functional challenge. It must provide a large volume to ensure adequate phonation and swallowing. We present the larynx sparing bilateral infrahyoid flap reconstruction procedure after total glossectomy.

Antero-medial approach to the wrist: anatomic basis and new application in cases of fracture of the lunate facet.

The Henry approach is the classical anterolateral surgical exposure of the volar aspect of the distal radius. This approach does not allow good access to the medial side of the volar distal radius (lunate facet) and the distal radio-ulnar joint, unless it is extended proximally, retracting the tendons and the median nerve medially, which can cause some trauma. The purpose of our study was to investigate the anatomic basis and to outline the advantages of the unusual anteromedial approach, reporting our experience in the treatment of 4 distal radius fractures, with a 90° or 180° twist of the lunate facet, and 10 wrist dissections on cadavers.

A multirecurrent ameloblastoma metastatic to the lung.

Introduction: The ameloblastoma is a rare tumor of odontogenic epithelial origin. It is a neoplasm in which ameloblastic features are revealed by the primary growth in jaws and by any metastatic growth. Recurrences are usually local and distant metastases are rare.

On two equations about brain volume, cranial capacity and age.

Aim: We decided to study the relationship between brain volume and cranial capacity and the relationship between brain volume and age on a series of CT from healthy adults.

Methods: Fifty-eight healthy volunteers (27 women, 31 men, age range 18-95 years) were examined using our imaging protocols. The volunteers had no present or past neuropsychiatric illness and no abuse of alcohol or illicit drugs.

Treatment of mandibular fractures with Michelet technique: manual fracture reduction without arch bars.

Purpose: In our Bordeaux maxillofacial surgery unit, we have used the Michelet technique described for 40 years: manual fracture reduction and semi-rigid miniplate osteosynthesis fixation. No maxillomandibular fixation (MMF) with arch bars or with screws was used for reduction during osteosynthesis. The aim of this work was to evaluate results of this unknown manual reduction method.

[276 cases of horizontal infrahyoid myocutaneous flap].

Introduction: The infrahyoid myocutaneous flap was described by Wang et al. in 1986. The horizontal design of the skin paddle is a modification of this technique allowing for a smaller scar.

Result of maxillomandibular fixation using intraoral cortical bone screws for condylar fractures of the mandible.

Purpose: Treatment of mandibular condylar fractures is not standardized. The maxillomandibular cortical bone screw fixation technique carries many advantages. The aim of this work was to evaluate this technique for routine method.

[Head and neck reconstruction with antebrachial flap concerning 100 patients].

We studied the files of head and neck reconstruction with antebrachial flap used in 100 patients between May 1996 and March 2007 in the department of Maxillofacial Surgery of the CHU of Bordeaux. Flap harvesting and vascular anastomosis were performed by the same operator. Antebrachial flap was used to cover the defect after resection of head and neck cancer in 89 patients and after shotgun injuries of the face in 11 patients.

[The horizontal infrahyoid myocutaneous flap: surgical technique].

The infrahyoid myocutaneous flap technique was described by Wang in 1986, the skin pad being orientated vertically. Its blood supply comes from the superior thyroid artery. This flap consists of the sternohyoid muscle, the sternothyroid muscle, and the superior belly of the omohyoid muscle.

[Role of PET-CT with 18-FDG in the management of UADT squamous-cell carcinomas: a retrospective study of 43 cases].

Introduction: The aim of our retrospective study was to evaluate the role of PET-CT in the management of upper-aerodigestive tract (UADT) squamous-cell carcinomas.

Material And Methods: Our study included 43 patients with UADT squamous-cell carcinomas having undergone PET-CT for: initial staging (n=20), diagnosis of recurrent disease (n=16), and response to treatment (n=7).

Results: PET-CT diagnosed distant metastases missed by conventional imaging in four patients (20%) in initial staging, four patients (25%) in diagnosis of recurrent disease, and two patients (29%) in response to treatment.