Application of fenestration and suction drainage for treatment of large odontogenic mandibular cystic lesions / 南方医科大学学报

<p><b>OBJECTIVE</b>To evaluate the effect of fenestration and suction drainage in the treatment of large odontogenic mandibular cystic lesions.</p><p><b>METHODS</b>From 2005 to 2009, 24 cases of large odontogenic mandibular cystic lesions were treated with fenestration and suction drainage. The clinical symptoms and radiographical findings were evaluated before the operation and at 1 month and 6 months after suction drainage.</p><p><b>RESULTS</b>Follow-up for 1-3 years showed that all the cystic lesions disappeared without recurrence, and the clinical symptoms were resolved.</p><p><b>CONCLUSION</b>Fenestration and suction drainage can reduce the cystic size and rapidly correct the deformity to serve as a useful modality for primary management of large odontogenic mandibular cystic lesions.</p>

Pectoralis major myocutaneous flap for repairing large tissue defects following oral cancer surgery / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the method for reconstruction of large tissue defects following surgical resection of advanced oral cancer using pectoralis major myocutaneous flap.</p><p><b>METHODS</b>From 2005 to 2009, 40 patients with advanced oral cancer received extensive surgical resection of oral cancer, and the intraoral defects were reconstructed using pectoralis major myocutaneous flaps.</p><p><b>RESULTS</b>All the flaps survived except one flap with partial necrosis.</p><p><b>CONCLUSION</b>Pectoralis major myocutaneous flap is effective for reconstruction of large tissue defects after resection of advanced oral cancer.</p>

Three-dimensional design of surgery for mandibular retrusion / 南方医科大学学报

<p><b>OBJECTIVE</b>To explore the feasibility of surgical design for mandibular retrusion using three-dimensional software.</p><p><b>METHODS</b>Three-dimensional reconstruction was performed by Mimics software based on the preoperative CT data. The model of the maxillofacial region was imported into Rapidform software for measuring the associated parameters and Geomagic software for simulation of osteotomy. The reliability of the virtual operation was validated during the surgery.</p><p><b>RESULTS</b>The model of mandibular retrusion was reconstructed and successfully used to simulate the surgery. The simulation result was applied in subsequent actual surgery and good surgical outcomes were achieved.</p><p><b>CONCLUSION</b>The three-dimensional software can be used to simulate the surgery for mandibular retrusion and improve the predictability and accuracy of the surgery.</p>

Expression of osteopontin mRNA in oral squamous cell carcinoma and normal oral mucosa / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate osteopontin (OPN) mRNA expression in oral squamous cell carcinoma (OSCC) and normal oral mucosa tissues.</p><p><b>METHODS</b>Differential OPN gene expression were detected in 30 cancerous tissues and their paired normal tissues using real-time reverse transcription-PCR (real-time RT-PCR), and the data were analyzed statistically.</p><p><b>RESULTS</b>Real-time RT-PCR results demonstrated that the relative expression level of OPN mRNA in the cancerous tissues were significantly higher than that in paired normal samples (4.17-/+0.51 vs 0.97-/+0.12, P<0.001), showing a 4.3-fold up-regulation. In the 30 OSCC specimens, OPN mRNA expression in the OSCC of histological grades I showed a 3.1-fold down-regulation, significantly lower than the expression in grade II/III tumors (2.16-/+0.17 vs 6.80-/+0.72, P<0.05); its expression was significantly lower in early stage than in advanced stage OSCCs (2.34-/+0.17 vs 4.73-/+0.35, P<0.05). In cases of cervical lymph node metastasis, the expression was significantly higher than that in cases without lymphatic metastasis (6.38-/+0.56 vs 2.89-/+0.32, P<0.05).</p><p><b>CONCLUSION</b>OPN mRNA overexpression may play an important role in OSCC carcinogenesis and can be a potential target for OSCC therapy.</p>

Expression of MMP1 mRNA in oral squamous cell carcinoma and paired normal tissues / 南方医科大学学报

<p><b>OBJECTIVE</b>To investigate the mRNA expression of matrix metalloproteinase 1 (MMP1) gene in oral squamous cell carcinoma (OSCC) and the paired normal tissues.</p><p><b>METHODS</b>The differential expression of MMP1 mRNA between 30 OSCC and paired normal tissues were detected with reverse transcription-PCR (RT-PCR).</p><p><b>RESULTS</b>The relative expression level of MMP1 mRNA in the OSCC tissues showed a 3.26-fold increase in comparison with that in the paired normal tissues (4.06-/+0.52 vs 1.24-/+0.17, P<0.0001). In the 30 OSCC tissues, the relative expression level of MMP1 mRNA was higher in histological grade II/III tissues (4.31-/+0.68) than in grade I (3.87-/+0.57) tissues, higher in OSCC in advanced stages (III/IV) than in tumors in early stages (I/II) (4.18-/+0.67 vs 3.65-/+0.53), and also higher in OSCC with cervical lymph node invasion than in those without cervical lymph node invasion (4.32-/+0.71 vs 3.91-/+0.51), but these differences were not statistically significant (P>0.05).</p><p><b>CONCLUSION</b>MMP1 gene may play a role in local invasion of OSCC, and can serve as a potential biomarker molecule for diagnosis, treatment and prognostic evaluation of OSCC, with also clinical value for OSCC classification.</p>