• Maxillofacial Plastic and Reconstructive Surgery
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• 제35권2호
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• pp.130-135
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• 2013

Primary intraosseous squamous cell carcinoma (PIOSCC) is a rare form arising within the jaws. PIOSCC is not related to the oral mucosa, presumably developing from remnants of the odontogenic epithelium. Because odontogenic cyst epithelium often transforms malignantly into PIOSCC, it could be misdiagnosed as odontogenic cyst based on a relatively ill-defined radiolucent lesion. Therefore, definite diagnosis is established from histological examination of biopsy samples taken during cyst enucleation in many cases. The present study is reported with a case of patient complaining of discomfort on his mandible. He was diagnosed as a putative dentigerous cyst and underwent a cyst enucleation treatment. After definite diagnosis as PIOSCC was established based on histologic findings, partial mandible resection and mandible reconstruction were performed. Up to the present, 10 months follow up of the patient showed satisfactory healing without recurrence and abnormal findings; thereby, we are reporting this case with literature review.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제37권1호
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• pp.77-80
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• 2011

A calcifying epithelial odontogenic tumor (CEOT) was first described as a separate entity in 1955 by Pindborg, and has since been referred to as Pindborg tumor. CEOT is characterized by the presence of squamous-cell proliferation, calcification and amyloid deposits, and accounts for only 1% of all odontogenic tumors. CEOT is a benign, though occasional locally invasive, slow-growing neoplasm. It is located either intraosseously or extraosseously, and is usually associated with an unerupted permanent tooth. A 24 year-old female visited our clinic, presenting with a palatal swelling and intra-oral ulcer. After an incisional biopsy, the lesion was confirmed to be odontogenic tumor. A tumor resection and reconstruction surgery with tongue flap were performed.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제40권5호
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• pp.211-219
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• 2014

Objectives: The purpose of this research was to create a scoring system that provides comprehensive assessment of patients with oromaxillofacial cancer or odontogenic infection, and to statistically reevaluate the results in order to provide specific criteria for elective tracheostomy. Materials and Methods: All patients that had oral cancer surgery (group A) or odontogenic infection surgery (group B) during a period of 10 years (2003 to 2013) were subgrouped according to whether or not the patient received a tracheostomy. After a random sampling (group A: total of 56, group B: total of 60), evaulation procedures were observed based on the group classifications. For group A, four factors were evaluated: TNM stage, reconstruction methods, presence of pathologic findings on chest posterior-anterior (PA), and the number of systemic diseases. Scores were given to each item based on the scoring system suggested in this research and the scores were added together. Similarly, the sum score of group B was counted using 5 categories, including infection site, C-reactive protein level on first visit, age, presence of pathologic findings on chest PA, and number of systemic diseases. Results: The scoring system rendered from this research shows that there is a high correlation between the scores and TNM stage in oral cancer patients, or infection sites in odontogenic infection patients. However, no correlation between pathologic findings on chest PA could be found in either group. The results also indicated that for both groups, the hospital day increased with the tracheostomy score. The tracheostomy score cutoff value was 5 in oral cancer patients and 6 in odontogenic infection patients which was used for elective tracheostomy indication. Conclusion: The elective tracheostomy score system suggested by this research is a method that considers both the surgical and general conditions of the patient, and can be very useful for managing patients with severe oral disease.

• 치과방사선
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• 제29권1호
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• pp.341-355
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• 1999

Squamous cell carcinoma is the most common type of oral cancer and odontogenic myxoma is relatively uncommon benign tumor of mesenchymal origin. There are, to our knowledge, no prior reports of simultaneously occurring squamous cell carcinoma and odontogenic myxoma of the jaw bones. In this case, at first, the plain films and computed tomograms revealed a large expansile multilocular radiolucent lesion on left mandible and marked expansion of cortical plate. In addition this radiograms revealed also infiltrative bony destruction of anterior and medial border of ascending ramus of left mandible and alveolar bone of left maxilla, floating teeth on left lower molar area and metastatic enlargement of left submandibular, jugular digastric and spinal accessory lymphnodes. Magnetic resonance imaging of this patient revealed infiltrative growth of tumor on alveolar bone of left maxilla, left retromolar fat pad. left masseter and left medial pterygoid muscle. Intraoral presurgical biopsy presented typical features of squamous cell carcinoma. After chemotherapy with radiation therapy during 6 months. this central lesion was diagnosed as odontogenic myxoma by the postsurgical biopsy. After 3 months, this patient presented multiple metastatic signs at lumbar spines, rib and liver. Consequently, our case is simultaneous occurrence of squamous cell carcinoma and odontogenic myxoma.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제34권6호
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• pp.498-504
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• 2012

The odontogenic keratocyst (OKC) was originally classified as a developmental cyst, and OKC is histologically divided into orthokeratic and parakeratic types. According to revised histopathological classification of odontogenic tumors by the World Health Organization (2005), the term, keratocystic odontogenic tumor (KCOT) has been adopted to describe parakeratic OKC. The KCOT is noted for its capacity to recur after treatment. The aggressive, or potentially aggressive, nature of KCOT has led to alternative treatments. Among the treatments is noted the use of Carnoy's solution as adjunctive intralesional therapy having a low rate of recurrence. This study suggests a possible benefit of Carnoy's solution against recurrence of KCOT.

• Maxillofacial Plastic and Reconstructive Surgery
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• 제31권5호
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• pp.419-424
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• 2009

Odontogenic myxoma, a rare tumour that occurs in the jaws, locally invasive, destructive tumors that do not metastasize to lymph nodes. Large odontogenic myxoma on mandible is treated by mandibulectomy, defected mandible is reconstructed by bone graft. Reconstructed mandible is difficult to reconstruct dentition using implant because of deficiency of bone amount. So it is necessary to additional bone graft. But a poor aspect of soft tissue lead to unsatisfactory result. Because of distraction osteogenesis is possible to reconstruction of an amount of bone and soft tissue, that is advantage to reconstruction of alveolar bone on reconstructed mandible. We report with review of literatures the 25 years old male patient who had odontogenic myxoma in left mandible, was undergone mandibulectomy and successfully implant installation and prosthetic restoration after distraction osteogenesis(Track $Plus^{(R)}$, KLS Martin, Germany) on the reconstructed mandible with a free iliac bone graft, and we have conservative and successful result.

• 치과방사선
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• 제26권2호
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• pp.147-152
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• 1996

Six observers with different amount of experience in the field of Oral and Maxillofacial Radiology interpreted the radiographs of 13 cases of ameloblastoma and 8 cases of odontogenic keratocyct which were confirmed histopathologically and showed pseudo-multilocular appearance and scalloped border radiographically. The authors examined the accuracy of radiologic diagnoses, interobserver agrement and intraobserver agreement. The obtained results were as follows; 1. The accuracy of radiologic diagnosis ranged from 0.48 to 0.81. The average value was 0.61. 2. The accuracy of radiologic diagnosis for ameloblastoma(0.55) was lower than that for odontogenic keratocyst(0.70) (P<0.05). 3. The overall agreement among the 6 observers was 14.3％ at the first interpretation and 19.0％ at the second interpretation. 4. The intraobserver agreement of each observer expressed in kappa index ranged from -0.14 to 0.64. The overall intraobserver agreement was 0.29. 5. The intraobserver agreement of each observer for ameloblastoma and odontogenic keratocyst ranged from -0.07 to 0.65 and from -0.25 to 1.00, respectively. The overall intraobserver agreement for ameloblatoma and odontogenic keratocyst were 0.27 and 0.26, respectively. 6. The diagnostic accuracy highly correlated to the intraobserver agreement(r=0.6370).

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제29권1호
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• pp.64-67
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• 2003

본 증례는 하악골 정중부의 종창과 미맹출 매복 견치를 주소로 내원한 12세 남아 환자로 환자의 임상 및 방사선 소견상 함치성 낭종으로 가진하였다. 그러나 정확한 진단과 환자의 조절 등의 문제로 인하여 전신마취하에 낭종성 병소의 적출을 시행하여 조직 검사를 시행하였으며 그 결과 매복 견치와 관련된 점액종으로 진단되었다. 이에 저자 등은 하악 양측 견치의 미맹출 매복치과 연관되어 매우 드물게 발생되는 점액종을 경험하였기에 문헌 고찰과 함께 보고하는 바이다.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제41권4호
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• pp.176-180
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• 2015

Objectives: The increased prevalence of antibiotic resistance is an outcome of evolution. Most patients presenting with odontogenic space infections also have associated systemic co-morbidities such as diabetes mellitus resulting in impaired host defense. The present study aims to compare the odontogenic spaces involved, antibiotic susceptibility of microorganisms, length of hospital stay, and the influence of systemic comorbidities on treatment outcome in diabetic patients. Materials and Methods: A 2-year prospective study from January 2012 to January 2014 was conducted on patients with odontogenic maxillofacial space infections. The patients were divided into two groups based on their glycemic levels. The data were compiled and statistically analyzed. Results: A total of 188 patients were included in the study that underwent surgical incision and drainage, removal of infection source, specimen collection for culture-sensitivity, and evaluation of diabetic status. Sixty-one out of 188 patients were found to be diabetic. The submandibular space was the most commonly involved space, and the most prevalent microorganism was Klebsiella pneumoniae in diabetics and group D Streptococcus in the nondiabetic group. Conclusion: The submandibular space was found to be the most commonly involved space, irrespective of glycemic control. Empiric antibiotic therapy with amoxicillin plus clavulanic acid combined with metronidazole with optimal glycemic control and surgical drainage of infection led to resolution of infection in diabetic as well as nondiabetic patients. The average length of hospital stay was found to be relatively longer in diabetic individuals.

• Imaging Science in Dentistry
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• 제34권1호
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• pp.49-54
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• 2004

Primary intraosseous carcinoma (PIOC) is a rare odontogenic carcinoma defined as a squamous cell carcinoma arising within a jaw having no initial connection with the oral mucosa, and presumably developing from residues of the odontogenic epithelium. A 56-year-old patient who complained of delayed healing after extraction of upper left central incisor visited our department. The conventional radiographs showed a bony destructive lesion with ill-defined margin and moth-eaten appearance. On the computed tomographic images, the lesion perforated the labial cortex of alveloar bone, elevated the left nasal floor superiorly, and perforated partially both nasal floor. The magnetic resonance images showed low signal intensity at T2 and Tl weighted images at the area and adjacent soft tissue. Histologically, there were irregular epithelial islands with cell atypia, nuclear hyperchromatism, pleomorphism, atypical mitosis. The final diagnosis was PIOC.