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Biomedical subjects

H S Loh

Publications and source records attributed to H S Loh.

At least 37 records · Page 2Linked to original sources
PubMed1989

Prosthodontic management of maxillofacial defects after cancer surgery.

Surgery for maxillofacial cancer often creates a defect, which may affect speech, swallowing, mastication and facial appearance. The provision of a prosthesis is one method to help restore these physiologic and psychologic functions. Prosthodontic planning and rehabilitation should be an integral part of the team management to provide not just the preservation, but a quality of life for the patient. Various types of appliances are illustrated and the role of the dental surgeon is emphasised.

Aged↗
PubMed1989

Clinical presentation of denture hyperplasia of oral tissues.

A clinical study on the presentation of denture hyperplasia was conducted on 15 patients with particular reference to age group, use and care of dentures, type and location of the hyperplastic lesion. The pilot study shows that a greater proportion of the studied sample were in the 50-60 years age group with a majority of them being unaware of the presence of the lesion in their mouth. Eleven of them responded that they use their dentures day and night. The incidence of lesions occurring in the lower jaw compared with the upper jaw was approximately 2:1. The average duration of denture usage was 8.7 years. Correct use of dentures and regular maintenance with professional care can help prevent the occurrence of these lesions.

Adult↗
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

Long-term dental management of cleft patients (Part 1).

This review paper examines the problems associated with the cleft patient and presents a scheme of management. Timing of each procedure is important, with particular emphasis on speech and maxillary development. The role of orthodontics is discussed.

Adolescent↗
PubMed1987

Dyskeratosis congenita in two male cousins.

Dyskeratosis congenita is reported in two male Singaporean Chinese cousins. The family pedigree is presented. Lichen planus or lichenoid lesions, instead of leukoplakia, was the manifestation in the oral cavity. The mode of inheritance and the differential diagnosis of Fanconi's anaemia are discussed. Dental findings are emphasised as such information is lacking in previously reported cases. One of the subjects expired of aplastic anaemia, which together with oral malignancy, is one fatal complication of this disease.

Child↗
PubMed1986

Are the incremental lines in human cementum laid down annually?

A local Singaporean study of the presence of incremental lines in the cement of extracted teeth of 41 identity card-holding subjects is reported. The undecalcified roots of these teeth were sectioned transversely, some of which were stained with alizarin red. The lines observed were counted by one observer while blind to the actual ages of the subjects. A previous suggestion that these lines are deposited annually could not be supported in this sample, the number of lines tending to produce a lower estimated age than that registered on the identity card. The Pearson correlation coefficient for the line counts between two observers on 26 teeth was 0.73 (r2 = 0.535) which reflected difficulties in visualising the lines.

Dental Cementum↗
PubMed1984

A retrospective evaluation of 23 reported cases of solitary plasmacytoma of the mandible, with an additional case report.

Twenty-four cases of solitary plasmacytoma of the mandible are reported in the literature. The criteria for the selection of cases and for their diagnosis are described. It is a rare condition, with a maximum occurrence in the fifth to seventh decades and a male to female ratio of 2:1. It predominates in the premolar and molar regions. Clinical and radiological features are non-specific. Diagnosis is by biopsy. Treatment of preference is surgery. Irradiation of greater than 5,000 Rads is also recommended. Investigations must be carried out for multiple myeloma. Long-term regular surveillance is advised, for infrequently, multiple myeloma may develop.

Adolescent↗