Gingival fibromatosis with multiple unusual findings: report of a rare case / 国际口腔科学杂志·英文版

Gingival fibromatosis is a rare disease, especially its syndromic form. Here, we review the literatures on gingival fibromatosis and briefly summarize some characters on clinical, etiological, genetic and histopathological aspects. We also present a rare case of gingival fibromatosis with multiple unusual findings in a 21-year-old man. And we differentiate it from some well-known syndromes including gingival fibromatosis. Maybe it implies a new syndrome within the spectrum of those including gingival fibromatosis.

Clinical application of radiotherapy for the treatment of giant vascular malformations in oral and maxillofacial region / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To discuss the clinical use of radiotherapy in the treatment of giant vascular malformation.</p><p><b>METHODS</b>Six patients with giant vascular malformation in oral and maxillofacial region were treated by three dimensional radiation therapy in Department of Stomatology, The Second Affiliated Hospital, School of Medicne, Zhejiang University in the last ten years and the cilinical data were reviewed. The treatment results were evaluated by clinical examination and radiology.</p><p><b>RESULTS</b>No complication was observed during and after the radiotherapy. All patients were satisfied with the aesthetic results. The lesions in MRI were all reduced and even disappeared. There was no sign of recurrence during the follow-up period.</p><p><b>CONCLUSIONS</b>Three dimensional radiotherapy is safe and effective for oral and maxillofical vascular malformation.</p>

Application of computer aided design-computer aided manufacture technique in mandible defect reconstruction with individual titanium prosthesis / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the application of computer aided design-computer aided manufacture (CAD-CAM) technique in the reconstruction of mandible defect with individual titanium prosthesis.</p><p><b>METHODS</b>Six patients with large mandibular ramus and angle tumor were spiral CT scanned preoperatively, and the CAD-CAM was used to design and make individual titanium prosthesis for reconstructing the mandibular defects after resection of the tumor. The prosthesis were assembled during operation. Postoperative follow-up period was 9 - 38 months.</p><p><b>RESULTS</b>The design and manufacture of titanium prosthesis by use of CAD-CAM technique was convenient and the prosthesis fitted the defects very well. The outline of the face, the occlusion and function were restored. After 9 - 38 months of follow-up, the mandibular symmetry was good.</p><p><b>CONCLUSIONS</b>The application of CAD-CAM provided accurate simulation and fast manufacturing process for the titanium prosthesis in the repair of mandibular defect.</p>

Study on the effects of overexpression of exogenous Notch1 in tongue squamous cell carcinoma cells on cell growth and expression of epidermal growth factor receptor in vitro / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the effects of overexpression of exogenous Notch1 in human tongue squamous cell carcinoma (TSCC) cells on cell growth and expression of epidermal growth factor receptor (EGFR) in vitro.</p><p><b>METHODS</b>Human TSCC cell line Tca8113 cells were transiently transfected with the eukaryotic expression plasmid pRAMIC-IRES2-EGFP encoding exogenous intracellular fragment of Notch1 and control plasmid pIRES2-EGFP by Lipofectamine 2000, respectively. Untransfected parental Tca8113 cells served as control. The cell proliferation was evaluated by methyl thiazolyl tetrazolium(MTT) assay. The apoptosis was assessed by flow cytometry. The mRNA and protein levels of Notch1 and EGFR in Tca8113 cells were detected by reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blot. The expression of EGFR protein in Tca8113 cells was detected by immunocytochemistry.</p><p><b>RESULTS</b>MTT assay showed that the cell proliferation of Tca8113 cells transfected with pRAMIC-IRES2-EGFP was significantly inhibited as compared with controls (P < 0.05). After transfected with pRAMIC-IRES2-EGFP for 48 h, the apoptosis rate of Tca8113 cells was significantly higher than those of Tca8113 cells transfected with pIRES2-EGFP and untransfected Tca8113 cells (P < 0.05), and Notch1 expression was significantly increased at mRNA (P < 0.05) and protein (P < 0.05) levels, while EGFR expression was significantly decreased at mRNA (P < 0.05) and protein (P < 0.05) levels.</p><p><b>CONCLUSION</b>Overexpression of exogenous Notch1 may inhibit cell growth and down-regulate EGFR expression in TSCC cells.</p>

Computer-aided design in double-step distraction osteogenesis of unilateral mandibular segmental defects reconstruction / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the feasibility of using computer-aided design (CAD) in double-step distraction osteogenesis in the reconstruction of mandibular segmental defects after tumor resection.</p><p><b>METHODS</b>Eight cases of unilateral mandibular segmental defects were reconstructed using distraction osteogenesis secondary to oncologic surgery, with the help of CT and CAD system. The mandibular body was lengthened first, and then the residual defect of mandibular ramus was restored using a distraction device.</p><p><b>RESULTS</b>No incidence of infection or other complications were observed. The maximal amount of the lengthening reached 55 mm in the mandibular body, and 45 mm in the mandibular ramus. The average amount of the lengthening reached 49 mm in the mandibular body, and 36 mm in the mandibular ramus. The aesthetic and functional results of bone lengthening were excellent in all cases. The retractor was removed eight months postoperatively.</p><p><b>CONCLUSIONS</b>Using CAD in double-step distraction osteogenesis in the reconstruction of unilateral mandibular segmental defects has the advantages of precise diagnosis, operation planning and assuring success of operation. It has the disadvantage of a long period for the overall treatment time.</p>

Effects of epidermal growth factor receptor gene silencing mediated by short hairpin RNA on proliferation and apoptosis of human tongue carcinoma cells / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the effects of epidermal growth factor receptor (EGFR) gene silencing mediated by short hairpin RNA (shRNA) on proliferation and apoptosis of human tongue carcinoma cells.</p><p><b>METHODS</b>shRNA eukaryotic expression vector targeting the specific sequence of human EGFR gene was constructed and termed shEGFR. The control vector targeting the unrelated sequence was also constructed and termed shNC. The vectors were transiently transfected into Tca8113 cells of human tongue squamous cell carcinoma by Lipofectamine 2000, respectively. The mRNA and protein levels of EGFR in Tca8113 cells were detected by reverse transcriptase polymerase chain reaction (RT-PCR) and Western blotting. The cell proliferation of Tca8113 cells was evaluated by methyl thiazolyl tetrazolium (MTT) assay. The apoptosis of Tca8113 cells was assessed by flow cytometry.</p><p><b>RESULTS</b>EGFR expression in Tca8113 cells transfected with shEGFR were obviously decreased at mRNA level (81.6%) and protein level (72.0%) (P < 0.05) 48 h after transfection of shEGFR compared with untransfected Tca8113 cells. The proliferation activity of Tca8113 cells transfected with shEGFR was significantly lower than that of Tca8113 cells transfected with shNC and untransfected Tca8113 cells (P < 0.05). The early apoptotic rate of Tca8113 cells transfected with shEGFR was significantly higher than that of Tca8113 cells transfected with shNC and untransfected Tca8113 cells [(39.4 +/- 7.7)%, (4.3 +/- 1.2)%, (2.5 +/- 0.9)%, P < 0.05] 48 h after transfection of shEGFR.</p><p><b>CONCLUSIONS</b>EGFR gene silencing mediated by shRNA may inhibit cell proliferation and induce apoptosis in human tongue carcinoma cells.</p>

Application of saliva protein fingerprints in the diagnosis of oral squamous cell cancer by surface enhanced laser desorption ionization time of flight mass / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To screen proteomic markers of oral precancerous lesion, local and metastatic squamous cell cancer from human saliva.</p><p><b>METHODS</b>Seventeen patients with oral squamous cell carcinoma, six cases with leukoplakia, seven cases with local metastasis and 15 healthy subjects were selected. All patients were diagnosed of T(1)N(0)M(0) and did not accept any preoperative treatment. Saliva samples were collected preoperatively, combined in the chips (CM-10) for two copies, and tested by surface enhanced laser desorption/ionization (SELDI) mass spectrometry respectively. Chips were detected by the PBS-II plus mass spectrometer reader. Mass accuracy was calibrated by the all-in-one peptide molecular mass standard (ciphergen ciosystems).</p><p><b>RESULTS</b>The differentiated pattern between oral squamous cell carcinoma and healthy people consisted of four biomarker peaks of 5797, 2902, 3883, 4951 (mass/charge) with the sensitivity of 88.24% and specificity of 93.33%. The differentiated pattern between oral squamous cell carcinoma and leukoplakia consisted of three biomarker peaks of 5818, 4617 and 3884 with the sensitivity of 100.00% and specificity of 100.00%. The differentiated pattern between oral squamous cell carcinoma and oral cancer with local metastatic consisted of three biomarker peaks of 55 809 and 5383 (mass/charge) with the sensitivity of 94.12% and specificity of 85.71%.</p><p><b>CONCLUSIONS</b>The biomarkers selected by SELDI could help in the adjuvant early diagnosis of oral cancer and forecasting the transformation from leukoplakia to oral cancer and metastasis.</p>

Expression of Notch1 and epidermal growth factor receptor in human tongue squamous cell carcinoma and precancerous lesion / 华西口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the expression of Notch1 in human tongue squamous carcinoma (TSCC) and precancerous lesion, and to explore the potential relation between Notch1 and epidermal growth factor receptor (EGFR).</p><p><b>METHODS</b>The expression of Notch1 and EGFR was detected in human TSCC (n = 41), tongue leukoplakia (LP) (n = 39) and normal tongue mucosa (n = 7) by immunohistochemistry.</p><p><b>RESULTS</b>In normal tongue mucosa and LP, the positive staining of Notch1 was mainly distributed in stratum corneum, partially in stratum granulosum and stratum spinosum, but not in stratum basale, while the positive staining of EGFR was mainly distributed in stratum basale, rarely in stratum spinosum, but not in stratum granulosum and stratum corneum. In TSCC, Notch1 expression was mainly distributed in locations of squamous metaplasia, but not in peripheral cells of carcinomas, while EGFR expression was detected mainly in peripheral cells of carcinomas, but not in locations of squamous metaplasia.</p><p><b>CONCLUSION</b>Notch1 promotes the differentiation of epithelial cells in tongue mucosa and acts as a tumor suppressor in TSCC. EGFR may act as a negative regulator of Notch1 expression in epithelium of tongue mucosa and TSCC, for maintaining cell proliferation and promoting the tumorigenesis and progression of TSCC.</p>

Double-step distraction osteogenesis in the reconstruction of unilateral mandibular segmental defects after tumor resection / 中华整形外科杂志

<p><b>OBJECTIVE</b>To investigate the application of double-step distraction osteogenesis in the reconstruction of mandibular segmental defects after tumor resection.</p><p><b>METHODS</b>From January 2002 to December 2006, six cases of post-tumor unilateral mandibular segmental defects were reconstructed using distraction osteogenesis. The mandibular body was lengthened first, following by mandibular ramus distraction.</p><p><b>RESULTS</b>No infection or other complication was observed. The maximal distraction length reached 55 millimeter in the mandibular body, and 42 millimeter in the mandibular ramus. The average distraction length was 52 millimeter in the mandibular body, and 34 millimeter in the mandibular ramus. Both the aesthetic and functional result was excellent in all cases.</p><p><b>CONCLUSIONS</b>Double-step distraction osteogenesis is effective and easily performed in the reconstruction of unilateral mandibular segmental defects with less morbidities and complications. There is no need for donor site. However, the treatment period is relatively long with three staged operations.</p>

Soft tissue profile changes in micrognathia after distraction osteogenesis / 中华整形外科杂志

<p><b>OBJECTIVE</b>To evaluate the effect of distraction osteogenesis for severe micrognathia by comparing the pre- and post-operative profile and mentolabial relationship.</p><p><b>METHODS</b>16 cases underwent temporal-mandibular joint plasty and temporal fasciomuscular flap transfer. The mandibular distraction began at the 5th postoperative day at a rate of 0.8 mm a day, two times a day. Bony and soft tissue cephalometry were performed before and after operation. T-test was used to study the change after distraction osteogenesis.</p><p><b>RESULTS</b>There were significant differences in facial convexity, lower facial height, lower lip length, inter-labial distance, the ratio of lip to mental, the distance from lip to esthetic plane, the depth of mentolabial crease and the thickness of mental soft tissue.</p><p><b>CONCLUSIONS</b>Mandibular distraction osteogenesis can markedly improve the soft tissue profile of the middle and lower face for severe micrognathia.</p>

Application of computer aided design/computer aided manufactured techniques in mandible defect reconstruction / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the application of CAD/CAM technique in reconstruction of mandible defect.</p><p><b>METHODS</b>Before surgery, three-dimensional computed tomography was performed in 23 patients with mandible lesions, then the CT data were transformed into a readable format to produce facsimile models by using rapid prototyping (RP) techniques. When individual mandibular models were produced, evaluation and surgical simulation were performed on the model, which included measuring range of mandible lesions, prefabrication of mandibular reconstructive titanium plates or distractors, ascertaining precise position of transport disk, and shaping the free vascularized fibula, etc. According to the simulation, the mandible reconstruction was accomplished in operation.</p><p><b>RESULTS</b>The surgical simulation on the model produced by CAD/CAM technique highly resembled the real operation. The measurements of the lesion on the model were completely correspondent with those found in operation, and the prefabricated plates and distractor fitted the contour of the mandible. The operation time shortened and the results were satisfactory. The post-operation X-ray showed that the mandible was symmetrical and the maxillofacial contour maintained.</p><p><b>CONCLUSIONS</b>CAD/CAM technique was very helpful for simulation of anatomically complicated mandible defect. By preoperative simulation of the mandible and lesions, surgeons are able to improve or refine surgical planning so that better results can be assured.</p>

Application of CAD/CAM techniques in mandible large-scale defect and reconstruction with vascularized fibular bone graft / 浙江大学学报·医学版

<p><b>OBJECTIVE</b>To exploit computer-aided design and computer-aided manufactured (CAD/CAM) techniques and application in the reconstruction of mandible large-scale defect with vascularized fibular bone graft.</p><p><b>METHODS</b>Before actually performing surgery, three-dimensional(3D) computed tomography(CT) was performed in 7 patients with mandibular large-scale defects, and 3D CT images were acquired by processing CT data. Then the CT data were transformed into a readable format and transferred to produce facsimile models by means of using rapid prototyping(RP) techniques. When individual mandibular models and enantiomorphous models were produced, evaluation and surgical simulation was performed in model, which included measuring range of mandible lesions, prefabrication of mandibular reconstructive titanium palate, precise position of titanium screws, shaping the free vascularized fibula by mandibular, etc. According to the simulations, the mandible reconstructions were finished in operation.</p><p><b>RESULT</b>CAD/CAM techniques and application can distinctly display the mandibular lesions and ambient relationships, which is very useful for clinical assessment and surgical planning. Particular advantages were the unlimited trials with the imaging method, and the feeling of reality with the model method. The actual operative time was shortened, and surgery results were satisfactory with few complications.</p><p><b>CONCLUSION</b>CAD/CAM techniques are very helpful for simulation of mandible large-scale defect with complicated anatomical and reconstructive problems. By preoperative simulation of procedures, surgeons can improve or refine treatment planning using this method and improve postoperative results.</p>

Deep lingual arterial chemoembolization of tongue carcinoma with microcapsuled anticancer drug / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

<p><b>OBJECTIVE</b>Microcapsule chemoembolism is a promising treatment of tumors. We describe a deep lingual arterial embolization of tongue carcinoma with microcapsuled carboplatinum.</p><p><b>METHODS</b>Lingual artery cast specimens from cadavers were microscopically examined, and 78 patients with tongue cancer were recruited and treated with the deep lingual arterial embolization therapy.</p><p><b>RESULTS</b>Microcapsule embolism occurred approximately at the fifth or sixth level of the deep lingual artery branches. The five-year survival rate was 88.5% (69 out of 78), and the ten-year survival rate 52.6% (41 out of 78).</p><p><b>CONCLUSION</b>The deep lingual arterial embolization of tongue carcinoma with microcapsuled carboplatinum is an effective therapy to treat carcinoma in mid-margin or mid-body of the tongue.</p>

Relative quantification of cytokeratin 19 transcription in oral squamous cell carcinoma tissues by fluorescent quantitive real-time RT-PCR / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the relative quantification of cytokeratin 19 transcription in oral squamous cell carcinoma tissues by fluorescent quantitive real-time reverse transcription-polymerase chain reaction ((RT-PCR).</p><p><b>METHODS</b>CK19mRNA level was detected by fluorescent quantitive real-time RT-PCR in cancerous and para-cancerous tissues from 31 oral squamous cell carcinoma patients. According to the 2(-DeltaDeltaCt) equation, the relative quantification fold of CK19mRNA level was calculated in cancerous tissues compared with para-cancerous tissues.</p><p><b>RESULTS</b>CK19mRNA levels in cancerous tissues were 2.21 folds higher than those in para-cancerous tissues, and the amplicon was specific. CK19mRNA level in cancerous tissue correlated significantly with pathological differentiation degree, the poorer the differentiation was, the higher the CK19mRNA level became.</p><p><b>CONCLUSIONS</b>Fluorescent quantitive real-time RT-PCR is accurate and reliable in the detection of relative quantification of CK19 transcription in oral squamous cell carcinoma tissues.</p>

The effect of artificial bone implantation in cleft palate on the development of maxilla / 中华整形外科杂志

<p><b>OBJECTIVE</b>To research the influence of palate bone implantation to the growth of maxilla in three dimensional direction.</p><p><b>METHODS</b>40 patients of congenital cleft palate type II with palate board damage were stochastically divide into the comparison group and bone planted group. In bone planted group, HA-Bone cement was used to repair palate tabular damage. All patients are 16 full year old, cephalometric radiograph and tooth cast model were measured and contrast analysis was applied.</p><p><b>RESULTS</b>Planted bone group and the comparison group does not have the significance difference in both the maxilla length and maxilla hightness( P > 0.05); But there was significance difference in the width of post-part of the maxilla (P < 0.05).</p><p><b>CONCLUSIONS</b>It could promote the growth of maxilla width in use of bone implantation, that advocated the bone repair in the sequence treatment process in cases of the hard palate bone damage.</p>

Relationship of expression of inducible nitric oxide synthase to microvessel density in oral squamous cell carcinomas / 浙江大学学报·医学版

OBJECTIVE: To study expression of inducible nitric oxide synthase (iNOS) in oral squamous cell carcinomas (OSCC) and its relations to microvessel density (MVD) and lymphatic metastasis. METHODS: With 9 cases of normal oral mucosa as control, the expression rate of iNOS in 41 cases of OSCC was evaluated by immunohistochemstry SP staining. With CD34 as label, MVDs of these cases were also detected. RESULTS: The iNOS expression rate of OSCC cases was 63.41%(26/41), while no positive expression was seen in 9 cases of normal oral mucosa. Anymore, the expression rate of N+ group was 85.00% while that of N group 42.90%, the rate between them was significantly different (P<0.01). There was correlation between MVD and lymphatic metastasis (rs=0.51, P<0.01). MVDs in groups of different iNOS expression( approximate, equals +++) were 29.667+/-6.945, 34.833+/-4.579, 46.357+/-6.687, 54.167+/-5.565, respectively, and were significantly different with each other (P<0.001). CONCLUSION: There is high expression rate of iNOS in OSCC, and it has close relation to lymphatic metastasis; angiogenesis may facilitate lymphatic metastasis of OSCC, and expression of iNOS has positive relation to MVD in OSCC.