Scielo RSS <![CDATA[South African Dental Journal ]]> http://www.scielo.org.za/rss.php?pid=0011-851620200006&lang=pt vol. 75 num. 6 lang. pt <![CDATA[SciELO Logo]]> http://www.scielo.org.za/img/en/fbpelogp.gif http://www.scielo.org.za <![CDATA[<b>Prof Mervyn Shear ... a towering presence in Oral Pathology</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600001&lng=pt&nrm=iso&tlng=pt <![CDATA[<b>COVID-19: When recovery does not mean a return to health</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600002&lng=pt&nrm=iso&tlng=pt <![CDATA[<b>From practitioner to patient - My COVID journey</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600003&lng=pt&nrm=iso&tlng=pt <![CDATA[<b>In the face of COVID-19, SADA continues to deliver to its members</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600004&lng=pt&nrm=iso&tlng=pt <![CDATA[<b>Throughputs of two cohorts of dental students at Sefako Makgatho Health Sciences University: A comparison</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600005&lng=pt&nrm=iso&tlng=pt INTRODUCTION: The numbers of student dentists enrolled at dental schools across the country do not give an indication of the students' progress to degree. AIMS AND OBJECTIVES: To describe and compare the throughputs of dentistry course for two cohorts of students at Sefako Makgatho Health Science University. The progress to degree of the 2005 and 2010 cohorts of first year dental students was tracked and compared. DESIGN: A comparative cross-sectional study. METHODS: Academic records of the 2005 and 2010 cohorts of first year dental students were followed up over a five-year period. Data related to the demographic characteristics, numbers enrolled, numbers who dropped out, and the numbers who graduated were acquired and then captured in Microsoft Excel software. RESULTS: Female students constituted the majority of enrolees in both cohorts (53.8% vs. 51.3%). The proportions of students who started the course, completed the degree and graduated within the regulation time among the 2005 and 2010 cohorts were similar (42.1% vs. 41.2%. A lone student among the 2010 cohort dropped out of the course. The majority of students (57.9% vs. 55.9%) in both cohorts took longer to qualify. CONCLUSIONS: The throughputs of dentistry course for the two cohorts hovered around 40% <![CDATA[<b>Comparison of three different instruments for orthodontic study model analysis</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600006&lng=pt&nrm=iso&tlng=pt INTRODUCTION: A proper model analysis forms a vital part of the orthodontic diagnosis process, but it remains a time-consuming procedure. In day-to-day practice, many orthodontists assess the models subjectively, without applying analytical tests, due to the time it takes to do proper model analysis.1,2 Plaster dental models have long been the gold standard for orthodontic study model analysis and to calculate the Bolton index for tooth size disproportions, as well as intra-arch space discrepancies.3,4 Vernier callipers or needle pointed dividers are traditionally used to perform measurements on dental models.5 More recently digital orthodontic study models that are computer-based have been developed and have the potential to replace the traditional plaster orthodontic models.6 AIMS AND OBJECTIVES: The aim of this study was to do model analysis on one hundred orthodontic cases by making use of three different measuring tools. The objective was to see if a difference exists with regards to the measurements produced by the three different instruments and to compare the instruments with each other. MATERIAL AND METHODS: Three different instruments were used to measure Ave values on one hundred orthodontic study models. The three instruments included a Boley Gauge, Digital Vernier Calliper and Carestream 3600 scanner with accompanying software. The five values measured on the study models were: maxillary intercanine width, maxillary intermolar width, mesio-distal width of tooth 11, mesio-distal width of tooth 46 and mesio-distal width of tooth 41. RESULTS: The statistical analysis performed showed that the difference in measurements produced by the three instruments were not statistically significant for the inter-molar width (p = 0.849), intercanine width (p = 0.657), mesio-distal width of tooth 11 (p = 0.178) and mesio-distal width of tooth 41 (p = 0.240 The difference in measurements for the mesio-distal width of tooth 46 were statistically significant (p<0.01). However no clinically significant difference was found when the measurements produced by the three instruments were compared. CONCLUSIONS: All three of the instruments produced accurate measurements and can be used confidently when doing a comprehensive study model analysis for orthodontic diagnosis and treatment planning. The values produced were similar for all three instruments with insignificant differences between the three <![CDATA[<b>The effect of off-axis seating on the marginal adaptation of full coverage all ceramic crowns</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600007&lng=pt&nrm=iso&tlng=pt INTRODUCTION: No studies on the marginal gap or internal fit of crowns have reported the effect of non-axial seating which may often occur inadvertently clinically. AIM: Therefore this in vitro study sought to investigate the off-axis seating of CAD/CAM crowns and its effect on the marginal gap and internal fit. METHOD: A standardised crown preparation on a typodont tooth was used to design and mill 30 crowns with a flat occlusal surface. Ten Zirconia (Dentsply Sirona, Germany), 10 Enamic (Vita, Austria), and 10 Brilliant Crios (Coltene, Switzerland) crowns were milled, Ave of each milled with a luting space of 100µm, and Ave of 200µm. The marginal gap was measured in two and three dimensions after luting with silicone on a 3D-printed metal replica. Seating occurred axially, at 5° buccally and 5° lingually. The silicone was used to calculate the internal fit RESULTS: Axial seating with a 100 µm luting space obtained the smallest marginal gap, irrespective of material or luting space. 3D measurements were larger than 2D measurements, but not significantly. The maximum off-axis gap was 117µm, on the opposite side to which pressure was applied. CONCLUSIONS: Care must be taken clinically to ensure that luting takes place in an axial direction only. <![CDATA[<b>Perforation of the palate - A report of two Syphilitic Gumma cases</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600008&lng=pt&nrm=iso&tlng=pt Syphilis has recently shown resurgence in its incidence especially in immune-compromised patients. We present two cases of tertiary syphilis in middle-aged males with large perforations in the hard and soft palates, one of which had Human Immunodeficiency Virus (HIV) co-infection. Diagnosis was initially difficult due to non-specific features mimicking other conditions such as perforation of cocaine abuse aetiology, neoplastic conditions, sarcoi-dosis, fungal infections, bacterial infections other than Treponema pallidum and Wegeners granulomatosis. With special investigations including Anti-Treponema Immunohistochemistry and histology, however, a definitive diagnosis of syphilitic gumma was reached. Intravenous penicillin was the mainstay of management along with treatment of the underlying medical conditions. A removable acrylic obturator was used to close the oro-nasal fistula to improve swallowing and speech. Syphilis should be included as a differential diagnosis in cases of palatal perforation. <![CDATA[<b>Calcific Metamorphosis - A review of literature and clinical management</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600009&lng=pt&nrm=iso&tlng=pt Syphilis has recently shown resurgence in its incidence especially in immune-compromised patients. We present two cases of tertiary syphilis in middle-aged males with large perforations in the hard and soft palates, one of which had Human Immunodeficiency Virus (HIV) co-infection. Diagnosis was initially difficult due to non-specific features mimicking other conditions such as perforation of cocaine abuse aetiology, neoplastic conditions, sarcoi-dosis, fungal infections, bacterial infections other than Treponema pallidum and Wegeners granulomatosis. With special investigations including Anti-Treponema Immunohistochemistry and histology, however, a definitive diagnosis of syphilitic gumma was reached. Intravenous penicillin was the mainstay of management along with treatment of the underlying medical conditions. A removable acrylic obturator was used to close the oro-nasal fistula to improve swallowing and speech. Syphilis should be included as a differential diagnosis in cases of palatal perforation. <![CDATA[<b>Visual assessment is no substitute for radiographic analysis - A forensic case report</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600010&lng=pt&nrm=iso&tlng=pt Syphilis has recently shown resurgence in its incidence especially in immune-compromised patients. We present two cases of tertiary syphilis in middle-aged males with large perforations in the hard and soft palates, one of which had Human Immunodeficiency Virus (HIV) co-infection. Diagnosis was initially difficult due to non-specific features mimicking other conditions such as perforation of cocaine abuse aetiology, neoplastic conditions, sarcoi-dosis, fungal infections, bacterial infections other than Treponema pallidum and Wegeners granulomatosis. With special investigations including Anti-Treponema Immunohistochemistry and histology, however, a definitive diagnosis of syphilitic gumma was reached. Intravenous penicillin was the mainstay of management along with treatment of the underlying medical conditions. A removable acrylic obturator was used to close the oro-nasal fistula to improve swallowing and speech. Syphilis should be included as a differential diagnosis in cases of palatal perforation. <![CDATA[<b>What's new for the clinician?</b>: <b>- Excerpts from and summaries of recently published papers</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600011&lng=pt&nrm=iso&tlng=pt Syphilis has recently shown resurgence in its incidence especially in immune-compromised patients. We present two cases of tertiary syphilis in middle-aged males with large perforations in the hard and soft palates, one of which had Human Immunodeficiency Virus (HIV) co-infection. Diagnosis was initially difficult due to non-specific features mimicking other conditions such as perforation of cocaine abuse aetiology, neoplastic conditions, sarcoi-dosis, fungal infections, bacterial infections other than Treponema pallidum and Wegeners granulomatosis. With special investigations including Anti-Treponema Immunohistochemistry and histology, however, a definitive diagnosis of syphilitic gumma was reached. Intravenous penicillin was the mainstay of management along with treatment of the underlying medical conditions. A removable acrylic obturator was used to close the oro-nasal fistula to improve swallowing and speech. Syphilis should be included as a differential diagnosis in cases of palatal perforation. <![CDATA[<b>Maxillofacial Radiology 182</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600012&lng=pt&nrm=iso&tlng=pt Syphilis has recently shown resurgence in its incidence especially in immune-compromised patients. We present two cases of tertiary syphilis in middle-aged males with large perforations in the hard and soft palates, one of which had Human Immunodeficiency Virus (HIV) co-infection. Diagnosis was initially difficult due to non-specific features mimicking other conditions such as perforation of cocaine abuse aetiology, neoplastic conditions, sarcoi-dosis, fungal infections, bacterial infections other than Treponema pallidum and Wegeners granulomatosis. With special investigations including Anti-Treponema Immunohistochemistry and histology, however, a definitive diagnosis of syphilitic gumma was reached. Intravenous penicillin was the mainstay of management along with treatment of the underlying medical conditions. A removable acrylic obturator was used to close the oro-nasal fistula to improve swallowing and speech. Syphilis should be included as a differential diagnosis in cases of palatal perforation. <![CDATA[<b>The renaissance of virtue ethics and its application in dentistry</b>]]> http://www.scielo.org.za/scielo.php?script=sci_arttext&pid=S0011-85162020000600013&lng=pt&nrm=iso&tlng=pt Virtue ethics, an ethical theory that focuses on concepts of how to live a good life and the characteristic traits or virtues of individuals, has enjoyed increasing popularity and considerable re-emergence in ethical assessment in various healthcare disciplines. This popularity is, in part, attributable to its contrasting approach to the more formalized rule-based approaches to ethical assessment in healthcare practice. The formalization of ethical healthcare practice (presented as the four principles of autonomy, beneficence, non-maleficence and justice) coupled with various codes of ethics, has led to a considerable focus and reliance on rules and obligations. A significant limitation of this type of approach arises from the difficulty in choosing which principle takes greater priority, in cases in which two or more principles are in conflict. What is more, in this rule-oriented approach, motivations of individuals, characteristic traits and relationships, which are important aspects in ethical deliberations, have taken a back seat. Against this background we describe and propose the incorporation of a virtue ethics approach, with a focus on the character and motivations of the individual or agent, as part of ethical deliberations in the practice of dentistry.