Magister Scientiae Dentium - MSc(Dent) (Diagnostics and Radiology)
http://hdl.handle.net/11394/45
2024-03-29T07:34:40ZIncidental calcifications s of the head and neck on CBCT scans
http://hdl.handle.net/11394/9818
Incidental calcifications s of the head and neck on CBCT scans
Ebrahim, Leila
One of the most notable additions to the dental imaging armamentarium is the introduction of cone-beam computed tomography (CBCT) scanning in general dental practices. The multi-planar functionality of CBCT allows for accurate localization of structures and pathology and hence minimizes the risk of overlapping of structure images, inherent in conventional two-dimensional radiographs. Additionally, the large image volume acquired in a CBCT scan means that more structures are viewable. Consequently, the chance of finding incidental findings (IFs) is increased. An IF could be defined as any asymptomatic entity/condition/presentation/region that draws the attention of a reporting clinician, with no clinical presentations prior to the primary exam. IFs occur extracranially and intracranially. Idiopathic, dystrophic, or metastatic calcification can affect head and neck structures and also be encountered as incidental findings.
>Magister Scientiae - MSc
2022-01-01T00:00:00ZA study of some cultural characteristics and blood serum antibodies: titers 0f enterococci isolated from the mouth and faeces
http://hdl.handle.net/11394/9082
A study of some cultural characteristics and blood serum antibodies: titers 0f enterococci isolated from the mouth and faeces
Slabbert, J C G
Crevicular epithelium presents no effective barrier to the
biologicaJly active constituents of plaque. Moreover, it
seems that the production of circulating antibodies, the
development of a state of delayed hypersensitivity and the
development of immunologicai tolerance all play a part in
the pathogenesis of periodontal disease. An investigation
was undertaken to study the cultural characteristics of
enterococci isolated from the mouth and gut of a group
of students, and to determinethe serum antibody titres to
these organisms. Enterococci were isolated from faeces
and the gingival crevice of 9 male dental students. Blood
was obtained from each subject and allowed to clot. The
serum was removed and stored at -20 0 C• unt'i l requi• red. Blood
serum antibody titres to the bacteria were obtained by the
indirect fluorescent antibody technique. In order to
investigate for the presence· of antibodies to homologous
and heterologous enterococcal strains, each subject's serum
was tested against all the strains of enterococci isolated.
Higher antibody titres were obtained to oral enterococci
than to faecal microorganisms. This investigation suggests
that there are either differences in the immunogenic
iii
potential of oral and faecal streptococci or micro-environmental
conditions in the host which favour antibody production to oral
streptococci as opposed to streptococci in the gut. There are
also differences in the cultural characteristics and bio=
chemical reactions of the gut and mouth organisms.
Magister Scientiae Dentium - MSc(Dent)
1975-01-01T00:00:00ZA comparison of two liner materials for use in the ferric sulfate pulpotomy
http://hdl.handle.net/11394/9047
A comparison of two liner materials for use in the ferric sulfate pulpotomy
Mohamed, N.
Pulp therapy in the primary dentition has always been a source of much controversy. Different pulpotomy techniques and medicaments have been covered extensively in the literature but due to the increasing awareness of the potential deleterious effects of some of these medicaments, a need has arisen in the dental profession to fmd safer, alternative pulpotomy agents. Ferric sulfate and calcium hydroxide have been suggested as possible, more biologically acceptable alternatives to formocresol, which is known for its toxic side effects. Ferric sulfate is one of the most recent agents used in vital pulp therapy and has enjoyed reasonable success. Further controversy also exists in terms of the type of base which is placed over the amputated pulp. The choice of the base seems to determine the pulpal response. Two
bases, calcium hydroxide (Dycal) and zinc oxide-eugenol (Kalzinol) have both been used in separate studies but have never been compared. The aim of this study is to compare the success rate obtained when applying one or the other of these two bases following a ferric sulfate pulpotomy. Presently it is unknown which base is best. In this study, after haemostasis was achieved with damp cotton pellets, ferric sulfate was applied to the pulpal stumps. Half of the cases then received a Dycal base followed by a cured layer of Vitrebond and a permanent amalgam restoration. The other half of the cases received a base of zinc oxide-eugenol (Kalzinol) followed by an amalgam restoration. Overall, teeth treated with Dycal demonstrated a higher failure rate when compared with those that received the Kalzinol base. Abscess formation and internal resorption were the most common causes of failure. Even though the Kalzinol base demonstrated greater success, there were still quite a few failures. This study demonstrates, that even with the use of a haemostatic agent, calcium hydroxide cannot be recommended as a medicament in primary tooth pulpotomies. It also highlights the need for alternative pulpotomy medicaments that are not irritating or harmful to the pulp.
Magister Chirurgiae Dentium (MChD)
2004-01-01T00:00:00ZCephalometric landmark detection: Artificial intelligence vs human examination
http://hdl.handle.net/11394/8795
Cephalometric landmark detection: Artificial intelligence vs human examination
Indermun, Suvarna
Cephalometric landmark detection is important for accurate diagnosis and treatment planning. The most common cause of random errors, in both computer-aided cephalometry and manual cephalometric analysis, is inconsistency in landmark detection. These methods are time-consuming. As a result, attempts have been made to automate cephalometric analysis, to improve the accuracy and precision of landmark detection whilst also minimizing errors caused by clinician subjectivity.This mini-thesis aimed to determine the precision of two cephalometric landmark identification methods, namely an artificial intelligence programme (BoneFinder®) and a computer-assisted examination software (Dolphin ImagingTM).
Magister Scientiae Dentium - MSc(Dent)
2021-01-01T00:00:00Z