[The preliminary study of the use of MRI navigation in identifying the safe surgical margin of the maxillofacial malignancy].

Objective: To evaluate the feasibility of MRI navigation in identifing the safe surgical margin of the maxillofacial malignancy.

Methods: The pathology results of the surgical margin identified by the technique of MRI navigation form 20 patients with maxillofacial malignancy were compared with those of 45 patients with maxillofacial malignancy who underwent the routine operation without MRI navigation.

Results: There was no difference between the two groups of patients in age, sex, size of tumor, tumor stages, pathologic diagnosis (P > 0.

A modified preauricular-temporal approach for fixing comminuted and redisplaced zygomatic arch fractures with the resorbable bone plate.

Objective: To evaluate the effectiveness of the rigid internal fixation for comminuted and redisplaced zygomatic arch fractures by modified preauricular-temporal approach with the resorbable bone fixation.

Methods: Totally twenty patients aged from 14 to 68 years and admitted to our hospital between September 2006 and June 2011 were reviewed, of whom seventeen had a unilateral comminuted zygomatic arch fracture and three re-displaced arch fracture after failed closed reduction. The fracture segments were aligned to restore the preinjury form of the arch by rigid fixation with resorbable plates and screws through a modified preauricular-temporal incision.

[Comparative study of clinical efficacy between surgery by intraoperative MRI navigation versus traditional surgical resection for malignancy of parapharyngeal space].

Objective: To investigate the clinical efficacy between mobile intraoperative magnetic resonance imaging (iMRI) navigation with a high field strength and routine surgical resection for malignancy of parapharyngeal space.

Methods: The surgical efficacy indexes of patients at our hospital during the time range from February 2010 to February 2011 were compared between two groups consisting of 29 or 42 individuals undergoing surgery with the assistance of the technique of iMRI navigation with a high field strength 1.5T or routine operation.

[The clinical application of acellular dermal matrix to repair the defect of oral mucosa].

Objective: To evaluate the clinical effect of acellular dermal matrix allograft in repairing the defect of oral mucosa.

Methods: Forty-two cases of large superficial defects in oral cavity were repaired by acellular dermal matrix. Defect areas included vestibule, tongue, the floor of mouth, buccal mucosa, palate, gingival and lip.