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Biomedical subjects

D Roberts-Harry

Publications and source records attributed to D Roberts-Harry.

31 records · Page 2Linked to original sources
PubMed1998

Applications of Scanora multimodal maxillofacial imaging in orthodontics.

The principles of the Scanora multimodal radiography system are described. This self-contained unit of X-ray generator, patient chair, and imaging elements incorporates the two basic principles of narrow beam radiography and spiral tomography. Conventional panoramic images or magnified images of the dentition can be produced. In orthodontics, the application of spiral tomography in order to obtain cross sectional images has proved helpful in the assessment of a number of patients. Four cases are reported in which the images obtained using this system has substantially contributed to their management.

Adolescent↗
PubMed1997

A study to determine if changes to an undergraduate orthodontic course improved course quality and student satisfaction.

A study was carried out to determine if changes to the undergraduate orthodontic course at Leeds Dental Institute resulted in increased student satisfaction. The study was based on a questionnaire distributed to dental students comprising statements related to the undergraduate orthodontic course. Questionnaires were distributed in 1993 and 1995 to 2 groups of 4th year undergraduate dental students at the same stage of their course on both occasions. Questions were in the form of 16 statements with which students expressed a level of agreement, ranging from strongly agree to strongly disagree. The numbers of responses at each level of agreement were compared between the 2 groups. Statistical differences were determined using a Mann Whitney-U test. 8 of the 16 statements had more favourable responses in 1995 than in 1993. No statement received a less favourable response in 1995 than in 1993. It is concluded that changes in the undergraduate orthodontic course at Leeds Dental Institute aimed at increased problem-based learning and clinician-led tutorials, have resulted in improved student satisfaction with the teaching.

Consumer Behavior↗
PubMed1996

Facial growth in patients with unilateral clefts of the lip and palate: a two-center study.

Two groups of 10-year-old patients with complete unilateral clefts of the lip and palate were examined in this study. Two centers; Bristol, U.K. and Oslo, Norway, who had different treatment regimens were used. The groups comprised 40 patients from Oslo and 32 from Bristol. The groups were matched, in proportion to the size of the groups, for age, sex, and presence of Simonart's bands. In Oslo, a Millard lip repaired was performed at 3 months of age with a von Langenbeck palatal repair at 18 months, no presurgical orthopedics was employed and there was no primary nasal correction. The Bristol center also repaired the lip at 3 months with a Millard type repair but also performed a radical nasal correction at the same time. The palate was repaired at 6 months with a Veau repair, and presurgical orthopedics using a pinned arch orthopedic plate was carried out. In addition, the volume of primary repairs per surgeon was much higher in Oslo, and a much stricter treatment protocol was used compared with Bristol. Lateral cephalograms obtained within 1 year of the child's tenth birthday were digitized, and the craniofacial morphology of the two groups was compared. Significant differences in maxillary growth and soft tissue profile were noted with a much more retruded mid-face and flatter nasiolabial angle in the Bristol group. The main factors for the better results in Oslo are suggested to be the absence of presurgical orthopedics, no radical nasal correction, the high volume of operations performed per surgeon, and the stricter protocol.

Age Factors↗
PubMed1996

The Goslon yardstick applied to a consecutive series of patients with unilateral clefts of the lip and palate.

First described in 1987, the Goslon yardstick has been used since as a reliable and reproducible means of measuring dental arch relationships and, therefore, the quality of facial growth. The dental study models of a group of 32 consecutively treated patients with unilateral clefts of lip and palate, from the Frenchay Hospital, Bristol, U.K., were analyzed using the Goslon yardstick. More than 50% of the sample were in the unfavorable Goslon groups IV and V. Because of these results, we at Frenchay Hospital now base our related surgical procedures on the early vomerine closure of the anterior hard palate without nasal or alveolar repair at 3 months, followed by primary hard and soft palate closure at 6 months.

Age Factors↗
PubMed1993

Sri Lankan cleft lip and palate study model analysis: clefts of the secondary palate.

The study models of a group of adult Sri Lankan patients with clefts of the secondary palate were investigated. Tooth-size and arch-dimension comparisons were made with a comparable control group. Significant differences were found between the cleft and control groups in tooth sizes, chord lengths, and arch widths. The cleft group dimensions were generally smaller than those of the control group. Overjets were larger in the cleft group.

Adult↗
PubMed1992

Repair of cleft lip and palate: 1. Surgical techniques.

Studies in Sri Lanka have demonstrated that in the absence of surgery, growth of the facial skeleton is normal. In developed countries, however, it is considered unacceptable to leave a child with an unrepaired cleft. The aim of surgery being to produce a near normal face. Part 1 provides an overview of the surgical repair of clefts and outline the general principles, as well as the most common surgical procedures. Part 2 will evaluate the surgical techniques and discuss the clinical research methodology involved.

Alveolar Process↗
PubMed1990

A study model analysis of adult unoperated Sri Lankans with unilateral cleft lip and palate.

The maxillary arch-form of 41 Sri Lankan adults with unoperated complete unilateral cleft lip and palate (8 female and 33 male) were compared to a control group of 100 normal Sri Lankan adults (45 female and 55 male). The teeth in the cleft group were smaller than their equivalents in the control group, the most marked difference being found in the central and lateral incisors. Arch widths of the cleft groups were reduced, more anteriorly than posteriorly, resulting in more V-shaped arches. No differences were found in the arch length or chord lengths between the groups. Crossbites occurred in 19.5 percent of the cleft group as compared to none of the controls. The overjet was greater in the cleft group than in the controls. A higher percentage of missing teeth was recorded in the cleft group.

Adolescent↗
PubMedDate not supplied

Repair of cleft lip and palate: 2. Evaluation of surgical techniques.

Currently there is no consensus on which surgical technique, timing or sequence produces optimal results. In addition, there are now good indications that strategies adopted by some centres produce consistently superior results compared with other centres. Part 1 provided an overview of the surgical repair of clefts and outlined the general principles, as well as the most common surgical procedures. Part 2 evaluates the surgical techniques and discusses the clinical research methodology involved.

Cleft Lip↗