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Biomedical subjects

Y Suei

Publications and source records attributed to Y Suei.

36 records · Page 2Linked to original sources
PubMed1996

Relationship between the mandibular and lumbar vertebral bone mineral density at different postmenopausal stages.

OBJECTIVE: To analyse the relationship between mandibular and general skeletal mineral status at two different postmenopausal stages. METHODS: Using dual energy quantitative computed tomography, the mandibular and 3rd lumbar (L3) vertebral bone mineral density (BMD) were evaluated in 21 women within five years after the menopause (recent postmenopause) and 23 women more than five years after (long-term postmenopause). RESULTS: There were significant correlations between the mandibular cortical and L3 vertebral BMD (p < 0.01) in the recent postmenopausal women and between the mandibular BMD and the trabecular BMD of L3 vertebrae (p < 0.05) in the long-term postmenopausal women. CONCLUSION: These results suggest that the general mineral status more markedly affects the mandibular cortex in the recent postmenopausal stage and both cortical and trabecular bone in the long-term postmenopausal stage.

Adult↗
PubMed1996

Usefulness of panoramic radiography in the diagnosis of postmenopausal osteoporosis in women. Width and morphology of inferior cortex of the mandible.

OBJECTIVES: To evaluate the usefulness of width and morphology of the inferior cortex of the mandible on panoramic radiographs in the diagnosis of postmenopausal osteoporosis. METHODS: The width and morphology of the mandibular inferior cortex on panoramic radiographs were compared with trabecular bone mineral density (TBMD) of the 3rd lumbar vertebrae (L3) measured by dual energy quantitative computed tomography in 29 premenopausal and 95 postmenopausal women. RESULTS: There was a significant negative correlation between the width (Kendall's tau = -0.36, p < 0.001) and morphology (Kendall's tau = -0.49, p < 0.001) of the mandibular inferior cortex and the L3 TBMD. Regression analysis showed that significant linear relationships were observed between the L3 TBMD and age (p < 0.001), cortical width (p < 0.05), morphology (p < 0.05), controlling body mass index, number of teeth present and menopausal status (R2 = 0.42). CONCLUSION: Our results suggest that panoramic radiography could be reliable in screening for osteoporosis.

Adult↗
PubMed1996

Case report. synovitis, acne, pustulosis, hyperostosis and osteitis (SAPHO) syndrome.

A case of the SAPHO (synovitis, acne, pustulosis, hyperostosis and osteitis) syndrome in a 35-year-old woman is presented. Ignorance of this entity on the part of the physicians treating the patient may have contributed to her having repeated diagnostic procedures and treatment, some of which may have been unnecessary. Dentists are encouraged to suspect the SAPHO syndrome when they encounter a patient with mandibular osteomyelitis together with symptoms involving other bones and skin lesions such as pustulosis or psoriasis.

Acne Vulgaris↗
PubMed1995

Mucosal condition of the oral cavity and sites of origin of squamous cell carcinoma.

PURPOSE: This study investigated the clinical appearance of the affected mucosa in patients with squamous cell carcinoma (SCC) in the oral and oropharyngeal region. PATIENTS AND METHODS: The mucosal conditions of 396 patients was classified into two types. Type A, showing ulcer formation and/or tumor formation, and type B, showing only mucosal enlargement without any other abnormality. RESULTS: Type A was detected in the oral cavity and oropharynx, and type B was observed only in the upper and lower alveolus and gingiva. Of 14 type B patients histologically evaluated for the relationship between the tumor cells and surface oral epithelium, 10 showed a disconnection between the epithelium and the tumor cells, whereas in two the tumor cells extended into the epithelium. CONCLUSION: It was concluded that SCC of type B is not of oral epithelial origin, but is of maxillary sinus epithelium or odontogenic cell origin. In the mandible, type B SCC originates from odontogenic epithelium (odontogenic carcinoma).

Carcinoma, Squamous Cell↗
PubMed1995

Tooth loss and mandibular osteopenia.

The relationship between mandibular bone mass and tooth loss was studied in 269 patients who had neither metabolic disease nor local lesions affecting the mandibular cortex. In all of the subjects, the outline of the mental foramen was distinctly disclosed on unilateral or bilateral panoramic radiographs. Mandibular bone mass was evaluated by determining the mandibular cortical width in the mental region with the use of panoramic radiographs. The relationships of mandibular cortical width to patient age and sex and the number of teeth present were also investigated. In male subjects, there was no significant correlation between the number of teeth present and the mandibular cortical width. Among women in their seventh decade, those with 15 or more teeth showed significantly greater mandibular cortical width than those with fewer teeth. Decrease of mandibular bone mass was positively correlated with tooth loss in female subjects.

Absorptiometry, Photon↗
PubMed1995

Oral signs as indicators of possible osteoporosis in elderly women.

The relationship between oral signs and osteoporosis was investigated to assess the possibility of using this as an indicator of postmenopausal osteoporosis. Sixty-four women between the ages of 50 and 70 years were evaluated. Osteoporotic signs consisted of thoracic spine fracture as demonstrated on lateral chest radiographs. Oral signs were the number of teeth present, mandibular cortical width, alveolar bone resorption, and the morphologic classification of the inferior cortex on panoramic radiographs. The number of teeth present (N) was highly related to the probability of thoracic spine fracture and was used to derive the probability equation for the presence of thoracic spine fracture: probability value = 1/(1 + e-z), Z = 18.68-0.29 age -0.27N. A probability value higher than 0.5 suggests the possibility of thoracic spine fracture. It was concluded that this equation could serve as a simple and useful tool for dentists to assess the possibility of latent osteoporosis.

Age Factors↗
PubMed1995

Possible identity of diffuse sclerosing osteomyelitis and chronic recurrent multifocal osteomyelitis. One entity or two.

On the basis of the findings of nine of our patients and our review of previously reported cases of diffuse sclerosing osteomyelitis and chronic recurrent multifocal osteomyelitis, we discuss the similarity of these two entities. Our nine patients had initially been given diagnoses of diffuse sclerosing osteomyelitis on the basis of their clinicopathologic findings. However, technetium 99m-MDP bone scans performed on four of them revealed multiple bone lesions leading to the diagnosis of chronic recurrent multifocal osteomyelitis. Furthermore, no clear difference between clinical features in the patients with multiple bone lesions and those in the patients with diffuse sclerosing osteomyelitis was found. We conclude that diffuse sclerosing osteomyelitis is an expression of chronic recurrent multifocal osteomyelitis.

Adult↗
PubMed1994

Chronic recurrent multifocal osteomyelitis involving the mandible.

A patient with chronic recurrent multifocal osteomyelitis is presented for the first time in the dental literature. On the basis of the initial diagnosis of diffuse sclerosing osteomyelitis of the mandible, the clinical course was protracted and refractory to surgical and antibiotic therapies. The literature is reviewed to evaluate the relationship between chronic recurrent multifocal osteomyelitis and diffuse sclerosing osteomyelitis. Distinguishing features between the two entities could not be found. It is recommended that a skeletal survey be performed when the diagnosis of diffuse sclerosing osteomyelitis is established.

Adult↗
PubMed1994

Formation of double contour in the human mandibular condyle. A case report.

This is the first report of double contour formation in the human mandibular condyle that includes both radiographic and histologic confirmation. Panoramic radiographs showed an additional cortical layer formation on the posterior of the condyle during follow-up after displacement of the condyle. Two cortical layers on the posterior portion of the condyle were demonstrated on the histologic specimen. The outer layer consisted of a few lamellated bone layers and included many osteocytes. However, minimal fibroconnective tissue was seen, and there was no cartilage layer. We concluded that the double contour formation was not caused by endochondral ossification but by periosteal bone formation.

Bone Remodeling↗
PubMed1994

Simple bone cyst. Evaluation of contents with conventional radiography and computed tomography.

To evaluate whether gas is present in the cavity of simple bone cysts, the clinical and histologic findings of 53 patients with simple bone cysts were examined and compared with an experimental model. The model consisted of a dry mandible with the medullary bone removed and the resulting cavity injected with water. Although an air-liquid level was observed on all radiographs for the experimental model, none was observed in the clinical cases of simple bone cysts. When the experimental cavity was completely filled with water, the density in the cavity was similar to that of the surrounding water on computed tomography, but when it was filled with air, the density was lower than that of the surrounding water. In contrast, in simple bone cysts said to contain air at surgery, the cavity contents were not consistent with the density for gas on computed tomography. These results indicate that the operative finding of air in the cavity of simple bone cysts may have been in error at least in some cases.

Adolescent↗
PubMed1994

Primary intraosseous carcinoma: review of the literature and diagnostic criteria.

Twenty-four reports describing 39 cases of primary intraosseous carcinoma (PIOC) were reviewed and the clinicopathologic features were summarized. The mean age of the patients at the time of diagnosis was 51.0 years, and the male: female ratio was 2:3. The posterior mandible was the predominant site; in no patient was a lesion observed in the posterior maxilla. Twenty-five of 31 patients (80.6%) showed swelling of the oral mucosa. However, ulcer formation was observed in only 3 of 36 patients. Pain, sensory disturbances, and metastasis to regional lymph nodes were observed in 25 of 34 patients (73.5%), 9 of 15 patients (60%), and 13 of 33 patients (39.4%), respectively. Radiographically, most lesions produced bone resorption with ill-defined margins (51.6%) or with well-defined margins (19.4%). The diagnostic criteria proposed for PIOC are absence of ulcer formation, except when caused by other factors; histologic evidence of squamous cell carcinoma without a cystic component or other odontogenic tumor cells; and absence of another primary tumor on chest radiographs obtained at the time of diagnosis and during a follow-up period of more than 6 months.

Adolescent↗
PubMed1994

Radiographic evaluation of bone invasion of adenoid cystic carcinoma in the oral and maxillofacial region.

PURPOSE: To investigate the relationship between clinicopathologic features and bone invasion in adenoid cystic carcinoma. PATIENTS AND METHODS: Thirty-two patients with adenoid cystic carcinoma were included. Of 17 patients with suspected bone invasion based on clinical and/or radiographic findings, 13 also underwent histologic evaluation. RESULTS: Bone invasion was detected in nine patients. Bone involvement was radiographically classified as erosive, diffuse invasive, or minimal change. No tumor infiltration into the surrounding bone marrow spaces was observed in the erosive-type tumors. However, tumor invasion through the resorbed cortex was observed with the diffuse invasive tumors and through the bone defects in the minimal change tumors. CONCLUSION: Histologically, diffuse invasive radiographic change was observed with solid lesions. However, minimal bone resorption was observed on radiographs of the glandular lesions, even when the tumor cells had infiltrated extensively into the bone marrow spaces. In the tumors of the tubular type, all three radiographic types were observed.

Bone Marrow↗
PubMed1991

Image salvage in panoramic radiography using histogram optimization.

Optical density and contrast recovery from poor quality panoramic radiographs was studied using the histogram modification technique. A series of experimental images of varying density and contrast were obtained by exposing a phantom in 4 kV steps between 50 and 94 kV. A standard of good image quality was selected by 10 observers grading the radiographs. Images were processed using the histogram specification technique and re-evaluated. All the processed images were found to be of acceptable quality. This technique was also shown to be applicable for salvaging unacceptable clinical radiographs.

Humans↗