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Biomedical subjects

J F Yeo

Publications and source records attributed to J F Yeo.

At least 37 records · Page 2Linked to original sources
PubMed1995

Oral pyogenic granuloma (excluding pregnancy tumour)--a clinical analysis of 304 cases.

A clinical analysis of 304 cases of pyogenic granuloma (excluding pregnancy tumour) were obtained from the clinical evaluations submitted by clinicians while sending specimens for biopsy. The average age of the patients with pyogenic granuloma was 28.9 years with a peak age incidence in the second decade. More female patients were affected and the lesions present mainly in the Chinese. The majority of the lesions were ulcerated and pedunculated. The lesions had a mean diameter of 10.8 mm with a mean lesion duration of 6.0 months. The gingiva was the prevalent site for these lesions with a greater number being located in the maxilla. The recurrence rate was found to be 14.1%.

Adolescent↗
PubMed1991

Primitive neuroectodermal tumour in the oral cavity. Case report.

Primitive neuroectodermal tumour is regarded as a rarely seen lesion as it occurs mainly within the central nervous system. However, this neoplasm does occasionally occur elsewhere in the body. One such case which occurred in the posterior part of the palate in a child is reported. Following a combined therapeutic approach comprising surgery, radiotherapy and chemotherapy, the patient has been well for nine years since treatment.

Child↗
PubMed1990

Bifid mandibular condyle.

This report brings the total number of bifid mandibular condyles reported so far in the English-language literature to 15 cases. In addition, one dried specimen with two distinct condylar heads is reported. This rare anomaly does not appear to have a predilection for any particular race or either gender. At the time of initial consultation, almost all patients are adults. Sixty-seven percent of the patients have no complaints related to the affected condyles, but the condition is an incidental dental panoramic radiographic finding. The left condyles seem to be affected twice as often as the right condyles. We do not yet fully know the etiology, epidemiology, and long-term functional effects of this condition. We recommend the transorbital condylar view as a good, inexpensive, and lower dosage technique, compared with the tomogram, to demonstrate this anomaly.

Adult↗
PubMed1990

Amyloidosis with oral involvement. Case report.

A patient with chronic renal failure was investigated after complaining of oral discomfort which was found to be due to macroglossia and generalized involvement of the oral soft tissues by amyloidosis. A search for multiple myeloma proved to be positive. She also had a previous history of Carpal-tunnel syndrome. Despite an initial good response to treatment with phenylalanine nitrogen mustard (melphalan hydrochloride), she finally succumbed to end-stage renal failure.

Amyloidosis↗
PubMed1990

Evaluation of soft tissue profile following intraoral ramus osteotomy in Chinese adults with mandibular prognathism.

Twenty-five Chinese adults with mandibular prognathism were treated with either the intraoral vertical subcondylar osteotomy or the bilateral sagittal split ramus osteotomy. The patients were kept in maxillomandibular fixation for 6 to 8 weeks while osteosynthesis was achieved with the use of intraosseous wiring. Serial lateral cephalograms were taken presurgery and between 12 and 26 months postsurgery, and specific soft and hard tissue points were digitized on a computer. The mean mandibular setback postsurgically was 8.4 +/- 3.2 mm, with a 5.2-degree reduction in point A-nasion-point B angle. Posterior movement of pogonion, point B and the mandibular incisal edge was accompanied by posterior movement of 95% at soft tissue pogonion (r = .96), 89% at soft tissue point B (r = .83), and 67% at labrale inferius (r = .81), respectively. The correlation between changes in the labrale superius and mandibular setback appeared to be dependent on both the amount of mandibular setback and the degree of mandibular rotation during the setback surgery. The presently reported ratios of the soft tissue response to hard tissue movement vary from those reported in white patients by other researchers, which confirms the need for different ratios for different racial types.

Adult↗
PubMed1989

Florid osseous dysplasia in Orientals.

Florid osseous dysplasia has been described as a condition that characteristically affects the jaws of middle-aged black women. It usually manifests as multiple radiopaque cementum-like masses distributed throughout the jaws. This condition has also been classified by various authors as sclerosing osteomyelitis, sclerosing osteitis, sclerotic cemental masses, gigantiform cementoma, and various other terms. In this series, we want to document eight cases of florid osseous dysplasia in middle-aged, female ethnic Chinese and one case in an Indian subject on the basis of radiographic and histopathologic findings. On the basis of this series, incidence is estimated to be 0.01 case per year 100,000 population. Florid osseous dysplasia constitutes 11% of cemental lesions in our files.

Adult↗
PubMed1989

Talisman in the orofacial region.

Among the various traditional beliefs and practices of the peoples of the Southeast Asia region is the practice of inserting talismans under the skin in various parts of the human body. In the orofacial region, these talismans (also called charm needles or charm pins) are also seen, usually as incidental radiographic findings. These talismans are believed to enhance the beauty of the wearers, as well as to provide protection to the wearers against harm. It is also believed that they could help the wearer obtain favorable business deals inasmuch as they are believed to have a "spell-like" influence on the business counterparts. In the present series, 67% of the patients are female and 66% of them are Muslim. Very little is known about the possible ill effects of these talismans because there is no report of these radiographic findings in major dental journals. In the present series of 12 cases representing a total of 65 talismans, only one talisman was surgically removed. We believe that generally no definitive treatment is required. However, we believe that the existence of these talismans should be made known so that they will not be misdiagnosed and mismanaged.

Adult↗
PubMed1989

Serious circulatory disturbance after Le Fort I osteotomy. A case report.

Severe impairment of the blood supply occurred in a patient who underwent a Le Fort I type osteotomy in which the fragment was displaced in a cranio-dorsal direction. Necrosis with sequestration of the torus palatinus present and some permanent parodontal damage ensued. Alternative procedures and management of developing circulatory impairment during surgery are discussed.

Adult↗
PubMed1989

Histoplasmosis presenting as hyperplastic gingival lesion.

A case of histoplasmosis presenting as ulcerated, hyperplastic gingiva and with no other systematic signs and symptoms is reported. The clinical presentation and the rarity of this condition led one of us to the differential diagnosis of a malignant lesion. The correct diagnosis was made after histological examination and tissue culture which yielded Histoplasma capsulatum. The patient was successfully treated with ketoconazole.

Adult↗
PubMed1989

Multiple odontogenic keratocysts of the jaws. Case report.

Single odontogenic cysts are very well documented in the literature. Of those less common reports concerning multiple jaw cysts, many have been associated with systemic conditions or syndromes such as Gorlin-Goltz or basal cell naevus syndrome, Hunter's syndrome and mucopolysaccharidosis, for example, Maroteaux-Lamy syndrome. A case of multiple odontogenic keratocysts unassociated with any syndrome is reported so as to add to the growing number of such cases in the literature. The possibility of this case being a partial expression of the Gorlin-Goltz syndrome is discussed.

Adolescent↗
PubMed1989

Retrograde removal of fractured endodontic instruments.

During root canal therapy, accidental fracture of endodontic instruments may occur. While in the majority of such cases the fragment concerned can be retrieved non-surgically, there are some occasions that surgical intervention is needed in order to remove the broken tip lodged within the root canal. In this paper the authors would like to suggest a management approach to this uncommon and extremely unpleasant complication in dental practice.

Adolescent↗
PubMed1989

Intraoral vertical ramus osteotomy.

In corrective surgery for mandibular prognathism, the vertical ramus osteotomy, also known as the vertical subsigmoid osteotomy (VSS) is one of the simplest osteotomy to perform and therefore widely popular with oral & maxillofacial surgeons. Traditionally, the surgical approach for VSS is by the extra-oral approach although the approach may be either extraoral or intraoral. In this paper, the main advantages and disadvantages of the following three techniques, i.e. VSS via extraoral approach, VSS via intraoral approach and the sagittal split ramus osteotomy will be discussed. The vertical ramus osteotomy via the intraoral approach is not usually performed in Singapore until recently. The authors would like to present the observations and a surgical technique employed by them to perform VSS osteotomy via an intraoral approach.

Humans↗
PubMed1989

Profile changes following anterior subapical osteotomy in Chinese adults with bimaxillary protrusion.

Nineteen adult Chinese patients, aged 18 to 28 years, who sought treatment for bimaxillary protrusion were treated with combined maxillary and mandibular anterior subapical osteotomy and the extraction of one premolar in each quadrant. Intraoral cephalograms were taken pretreatment and an average of 19.8 months posttreatment. Significant cephalometric soft tissue changes (P less than .01) included increase at the nasolabial angle, reduction of both the upper and lower lip protrusions, lengthening of the upper lip, and decrease in the interlabial gap. The predictable success and the fact that these improvements in facial profile usually can be achieved in as little as 3 to 9 months make this mode of addressing bimaxillary protrusion a viable alternative to orthodontic treatment of adult patients with bimaxillary protrusion.

Adolescent↗
PubMed1988

Reconstruction of soft tissues of the chin and lower lip region following excision of a basal cell carcinoma.

A rather unusual case of basal cell carcinoma of the labio-mental fold area is presented where it was possible to preserve the vermilion of the lower lip after wide excision. This made reconstruction with bilateral nasolabial flaps and a platysma myocutaneous flap possible. Thus the sensitivity of the lower lip could be partly preserved, a competent lip seal obtained, microstoma avoided and a good vestibulum reconstructed.

Basal Cell Carcinoma↗