Department of Restorative Dentistry

Permanent URI for this community

https://hdl.handle.net/10566/1897

The Department of Restorative Dentistry conducts both undergraduate and postgraduate programmes on the entire scope of Restorative and Prosthetic dentistry. Disciplines include Basic Conservative Dentistry, Dental Materials, Endodontics, Fixed and Removable Prosthodontics and Implantology. The postgraduate program consists of a postgraduate diploma, a clinical master’s programme, a research masters programme as well as a master’s specialist training programme.

Browse

Now showing 1 - 20 of 62

A comparative study evaluating physical properties of four tissue conditioners relined to modeling plastic material
(Universty of the Western Cape, 2024) Abdelrahman, Shahad Karamalla Ali; Asia-Michaels, Winifred
Tissue conditioners are widely used to allow for the healing of the insulted denture-bearing area and as a functional impression material for relining existing dentures, they display different clinical behaviours that are expressed in their viscoelastic properties. This variation should be considered when determining the type of tissue conditioner used in each clinical situation. Aims and objectives: To explore the physical properties of four different commercially available tissue conditioners after 1 and 7 days of immersion in Phosphate Buffered Saline (PBS). Methodology: This is a comparative quantitative in-vitro study evaluating the E-modulus, force exerted, water sorption, and solubility of four tissue conditioner groups. The groups named; Visco-gel, GC Coe-comfort, GC Soft- liner, Functional Impression Tissue Toner (FITT). Each group had 25 samples, and experiments were conducted at days 0, 1 and 7 of immersion in a simulated environment (PBS), totaling 100 samples in this study. Results: The following mean values were registered on days 1 and 7 respectively. The E-modulus values were .166 and .237 for Visco-gel, .046 and .061 for Coe-comfort, .112 and.188 for Soft-liner, and .025 and .031 for FITT. The force values were 5.708 and 7.620 for Visco-gel, 1.688 and 2.312 for Coe-comfort, 3.436 and 6.348 for Soft-liner, and .84 and 1.076 for FITT.
Ability of 5th year Students to Detect Early Interproximal Caries
(2021) Muzan, Abdalla; Khan, Saadika
Objective: The objectives of this study were to evaluate the diagnostic capability of 5th year students using digital imaging, conventional bitewing radiographs (BW), printed film on paper and to compare the results with the observers’ experience level to detect early interproximal caries lesions on radiographs. To map the literature in regards to different diagnostic methods that students use globally in dental clinics by conducting a scoping review. Methods: A cross-sectional study was conducted with senior dental students (Reg No: BM 19/9/8). Three digital radiographs were shown individually to the students on a screen, 3 bitewing radiographs and 3 printed films on paper were passed on individually to all students with a questionnaire; with a viewing time of 2 mins per radiograph; thus 9 radiographs in total were viewed. A control group consisting of specialists from both the Restorative and Radiology Departments had finalized the answers prior to conducting the study regarding the presence/absence of caries and its depth on all 3 different radiographic images. The answers recorded by students were divided into 5 categories, R0: Intact surface, R1: Radiolucency in outer half of enamel, R2: Radiolucency in inner half of enamel, R3: Radiolucency in outer half of dentin, and R4: Radiolucency in inner half of dentin. A protocol specific for the objectives of this study was developed according to the criteria for a scoping reviews. Relevant databases (Pubmed, Scopus, Ebscohost, Science Direct, Wiley Online Library and Cochrane Library) were searched to identify evidence which was restricted to the English language for the period 2015–2021. Results: Comparison using an Anova test on the 3 different diagnostic methods showed that the type of method used affects the presence detection and size measuring accuracy, where the P-value confirms a significant difference. The Prisma flow diagram showed a result of the most common methods for diagnosing interproximal caries happen to be visual examination and bitewing radiography. Conclusions: Senior dental students have shown good accuracy in detecting the presence of interproximal caries. Although the accuracy in detecting the size of carious lesions was poor.
Accuracy in reproduction of bounded edentulous saddle areas using different cast fabrication methods: A comparison
(University of the Western Cape, 2022) Essa, Ameera Yusuf; Farao, Warren
A common patient-request when presenting to restorative clinicians is replacement of missing teeth either by means of a fixed partial denture (FPD) or a removable partial denture (RPD). For decades, dental casts have been fabricated via the conventional cast fabrication technique which presents with its own set of disadvantages. To address these disadvantages, digital cast fabrication has been presented as an alternative. This is done via intraoral scanning and subsequent three-dimensional (3D) printing of dental models. However, the stitching process in intraoral scanning can be inadequate for areas lacking adequate geometry, such as edentulous saddle areas.
An in vitro study on the effect of organic derived nano hydroxyapatite on dentine permeability
(Universty of the Western Cape, 2023) Nyongesa, Christine Khanili; Adam, Razia
Dentine sensitivity, hinders oral hygiene practices and limits consumption of specific foods and drinks. Studies have shown that, the severity of dentine sensitivity is related to the permeability of dentine tubules such that the more permeable the tubule is the higher the degree of sensitivity. Hydroxyapatite is one of the components known to block dentine tubules to reduce their permeability. The use of eggshells in deriving nano hydroxyapatite is an important approach as it also contributes to organic waste management. The purpose of this study was to assess and compare the effectiveness of organic nano hydroxyapatite derived from eggshells on dentine tubules permeability. This is an in vitro study, in which specimens of 72 human tooth dentine material were sectioned to thickness of 120, 250, 350, 500, 750, 1000 micrometers. The specimens were then exposed to four groups of treatment including deionized water, Sensodyne Sensitivity and Gum toothpaste, Colgate toothpaste and organic derived nanohydroxyapatite derived from eggshells.
An in-vitro evaluation of the physical properties of a new bulk-fill composite
(University of the Western Cape, 2017) Eltayeb, Aziz; Patel, Naren
Dental composite is a synthetic resin that is used as a tooth coloured restorative material in dentistry. It became the material of choice in the dental field due to its superiority in strength and aesthetics (Garcia et al., 2006). Composite resin has favourable physical properties such as high wear resistance and shade stability. The main disadvantages are as follows: polymerization shrinkage which leads to marginal leakage; discoloration of the filling; postoperative sensitivity; and recurrent caries (Garcia et al., 2006). In order to decrease the application time of incremental layering techniques in conventional resin composite restorations, bulk-fill composites were introduced to the dental market with modifications in physical and mechanical properties. BulkFill composite can be applied in a single one-step increment layer of 4 - 5mm, saving considerable time during the clinical procedure when compared to the conventional composite layering technique of 2 mm (Leprince et al., 2014).
An in-vitro study of a modified bioactive orthodontic cement
(University of the Western Cape, 2017) Moodley, Tashia; Geerts, Greta
Introduction: Demineralization of the enamel surface adjacent to bonded orthodontic brackets during treatment is an ongoing drawback, especially when manifested as white spot lesions. Enamel demineralization is initiated by organic acids produced mainly by Streptococcus mutans. A favourable substitute is the development of orthodontic bonding agents with antibacterial or microbial properties. Chitosan is an interesting candidate in this respect. Thus, the rationale of this study was to incorporate chitosan into an orthodontic cement to create a novel orthodontic cement and assess whether the incorporation of chitosan to an existing orthodontic cement would affect its biological and physical properties.
Analysis of coronal discoloration from commonly used obturation materials
(University of the Western Cape, 2007) Elkhazin, Mohamed M. A.; Osaman, Y.I; Dept. of Restorative Dentistry; Faculty of Dentistry
The objective of this study was to assess coronal discoloration due to four commonly used endodontic sealers with gutta-percha, using spectrophotometric analysis. Extracted human teeth were obturated with the experimental sealers and GP. The sealers that were tested included AH Plus, EndoRez, and Kerr Pulp Canal Sealer. The teeth were maintained in a moist environment at 37 C. Immediate pretreatment readings of the crowns of the extracted teeth with a spectrometer were used as baseline data. Subsequent readings were taken every two weeks for two months. Results were analysed using Wilcoxson Signed Rank sum test and Kruskal Wallis test.
Antifungal and cytotoxic potential of green synthesized silver nanoparticles
(University of Western Cape, 2021) Klein, Widadh; Adam, Razia Z
The rate at which the population is ageing is much faster than in the past. An increase in age results in an increase in oral diseases. One of the most common types of oral diseases in the elderly are fungal infections caused by Candida albicans. It has been noted that drug resistance to fungal pathogens is developing into a serious threat to public health and healthcare systems worldwide. This has consequently led to the need to develop effective and innocuous treatment modalities. The purpose of this study was to explore the antimicrobial and cytotoxic potential of silver nanoparticles (AgNPs) synthesised from Berzelia lanuginose, Helichrysum cymosum, and Searsia crenata.
Clinical evaluation of shade improvement after in-office vital bleaching
(University of the Western Cape, 2010) Salem, Yousef; Osman, Y. I.
Tooth discoloration has increased the demand by patients to pursue aesthetic treatment options. Bleaching is considered a conservative approach in performing an aesthetic treatment for discolored teeth; however colour rebound and post-operative sensitivity are among the adverse effects associated with vital bleaching. In-office bleaching systems employ the use of high hydrogen peroxide concentrations. The effects of in-office bleaching agents on the degree of colour change and the gender differences in relation to bleaching outcomes are questionable. Post-operative sensitivity can be considered a bleaching side effect and the number of patients that experience it is unknown. Aim: The aim of this study was to assess the outcome of an in-office vital bleaching technique. Objectives: The objectives of this study were to evaluate the degree of colour change after vital tooth bleaching using a 35% hydrogen peroxide gel (Yotuel® Special, Biocosmetics Laboratories, Spain), using a spectrophotometer (CM-2600d Konica, Minolta) to measure the colour change at each intervention during the bleaching process, to assess the post operative sensitivity during the first week of the intervention, to evaluate the patients' perception of the colour change and to compare it to the colour change (~E) expressed in numeric values and to investigate whether gender differences exist in relation to the outcome of the bleaching procedure. Materials and Methods: The maxillary anterior teeth of 22 patients comprising of 11 males and 11 females were. bleached with a 35% hydrogen peroxide gel (Yotuel® Special, Biocosmetics Laboratories, Spain). Pre-treatment readings of the two maxillary central incisors using a spectrophotometer (CM-2600d Konica, Minolta) were obtained. Subsequent readings were obtained after scaling and polishing, before bleaching (which was used as a baseline reading), immediately after bleaching, one week and one month postoperatively. Patients were requested to complete a form regarding postoperative tooth sensitivity and their colour perception toward the bleaching treatment. Results: The quantitative effect of the bleaching material on tooth colour showed an increase in L * values and a decrease in a* and b* values, the changes were significant (p values- 0.05) except for the mean value of b* one month after bleaching which was only significant between five and ten percent.
Clinical evaluation of shade improvement after in-office vital bleaching
(University of the Western Cape, 2010) Salem, Yousef; Osman, Yusuf I.
Tooth discoloration has increased the demand by patients to pursue aesthetic treatment options. Bleaching is considered a conservative approach in performing an aesthetic treatment for discolored teeth; however colour rebound and post-operative sensitivity are among the adverse effects associated with vital bleaching. In-office bleaching systems employ the use of high hydrogen peroxide concentrations. The effects of in-office bleaching agents on the degree of colour change and the gender differences in relation to bleaching outcomes are questionable. Post-operative sensitivity can be considered a bleaching side effect and the number of patients that experience it is unknown.Aim: The aim of this study was to assess the outcome of an in-office vital bleaching technique. Objectives: The objectives of this study were to evaluate the degree of colour change after vital tooth bleaching using a 35% hydrogen peroxide gel (Yotuel® Special, Biocosmetics Laboratories, Spain), using a spectrophotometer (CM-2600d Konica, Minolta) to measure the colour change at each intervention during the bleaching process, to assess the post-operative sensitivity during the first week of the intervention, to evaluate the patients' perception of the colour change and to compare it to the colour change (ΔE) expressed in numeric values and to investigate whether gender differences exist in relation to the outcome of the bleaching procedure. Materials and Methods: The maxillary anterior teeth of 22 patients comprising of 11 males and 11 females were bleached with a 35% hydrogen peroxide gel (Yotuel® Special, Biocosmetics Laboratories, Spain). Pre-treatment readings of the two maxillary central incisors using a spectrophotometer (CM-2600d Konica, Minolta) were obtained. Subsequent readings were obtained after scaling and polishing, before bleaching (which was used as a baseline reading), immediately after bleaching, one week and one month post-operatively. Patients were requested to complete a form regarding post-operative tooth sensitivity and their colour perception toward the bleaching treatment. Results: The quantitative effect of the bleaching material on tooth colour showed an increase in L* values and a decrease in a* and b* values, the changes were significant (p values ≤ 0.05) except for the mean value of b* one month after bleaching which was only significant between five and ten percent.The mean values of colour change measured as ΔE between baseline and after bleaching was found to be 3.4 which did not exceed the visible colour change perceptible clinically at a difference of 3.7 units according to the literature. However nine patients exceeded the visible clinical colour change immediately after bleaching. There was no gender difference in the ΔE values in the entire bleaching process. Tooth sensitivity is considered a bleaching side effect and in this study sensitivity was traced until the fifth day after bleaching. The mean value of patients' tooth sensitivity was found to be 1.73 in the first day on a 4 point visual analog scale. The mean value of patients' colour perception was found to be 2.14 immediately after bleaching on a 3 point visual analog scale. Spearman correlation tests showed a positive relationship between ΔE values immediately and one week after bleaching and a weak relationship one week and one month after bleaching. There was significant consistency in the patients‟ colour perception data immediately and one week after the bleaching process and a weak relationship between ΔE values and patients' colour perception one month after bleaching. Conclusion: Yotuel® Special, Biocosmetics Laboratories, (Spain) an in-office bleaching material consisting of 35% hydrogen peroxide was able to bleach patients' teeth with a perceptible colour change however the chalky white teeth desired were not obtained for all the patients. Tooth sensitivity was a temporary side effect.
A Clinical Study to Determine the Factors That May Influence Results in Non-Surgical Endodontic Retreatments
(University of the Western Cape, 2010) Zolty, Gary; Saayman, Charlene
When faced with a failing or failed root treatment, the dentist must decide whether the tooth can be retreated and saved or extracted. The dentist's decision to retreat is often based on the x-ray presenting a failing root treatment. The dentist must be aware that there might be a number of factors that have contributed to the failure and which may preclude, following retreatment, a successful long term clinical function. The current study has been made to determine those factors that may influence the prognosis in order to assist the clinician in advising the patient of the best course of treatment. A literature review was made to determine and identify these factors and explain their relevance and influence on the healing process. The current study included identifying the factors described in the literature review and noting their influence on the prognosis following non-surgical retreatment. Retreatment of failed root treated teeth requires special knowledge and skill from the clinician in order to correct and manage the case. The current study was made in a clinical setting and compared results of retreatment with two types of rotary files on the market: progressive or variable taper (Pro Taper) with constant non-ISO 06 taper (K3). Clinical signs and symptoms were noted at the patient's presentation and following recalls at 1, 4 months and 1 year. The results were recorded and statistically analysed and the results were discussed. The results showed that out of 81 patients 10cases of retreatment were considered to have failed and 68 cases were considered to have been successful. Three patients did not return for their assessments and were therefore not considered in further results. There was a statistically significant (p<0.1 0) recording of deep periodontal pockets associated with teeth with failing root treatments (40%) and (13%) in the "Success" group. The two estimated proportions of "Sinus" present (60%) in the "Failure" group and 10% in the 'Success' group were significantly different (p<0.01). "Sinus present" in the "Success group" means in the initial clinical assessment before retreatment was initiated. The presence of a sinus at the One Year follow up signified a failure of the root retreatment (p<0.001). The two estimated proportions of "Occlusion" present (80% and 99%) in the "Failure" and "Success" group were significantly different (p<0.05). Therefore, teeth in "occlusion" were more within the "Success" group. 70% of those teeth that failed had pretreatment apical rarefactions of greater than 6mm diameter; whereas 76.5% of successful retreatments had areas less than 6mm diameter. The differences were significant according to Fisher's Exact Test (p<0.01). 44% of failed cases had areas of rarefaction described as "diffuse"; and 56% of failed cases had areas that were described as "well-defined". 95% of cases that were successful had areas described as "diffuse" and the rest were "welldefined". The differences between the success and failure categories were statistically significant (p<0.0 1). The two estimated proportions of "Post present" (0% and 31%) in the "Failure" and "Success" groups were significantly different (p<0.1 0). Therefore, the "Post was present" in many more cases within the "Success" group than in the "Failure" group. There was no difference between the Median "Crown/Root" ratios of the "Failure" (Median = 0.595) or "Success" groups (Median = 0.662) (Wilcoxon Test, p>O.10). Teeth with longer roots tend to lead to failure, however there was a considerable overlap between the distributions. Therefore the finding is that the Median length of the roots of the "Failures" is longer than that of the "Successes". (Wilcoxon Rank Sum Test, p-value = 0.0628). The results also indicated that previous short root filling preparation contributes to the final success of retreatment (Fisher Exact Test, p<0.05). There was a significant difference between the distribution of the "Failure" and "Success" (88.2%) groups (Fisher Exact Test, p
Colour comparison of two composite materials to natural tooth structure: an in vitro study
(University of the Western Cape, 2013) Grundlingh, Andries Adam; Patel, N.; Grobler, S.
This in vitro study compares the ability of two composite materials Filtek Supreme XTE™ (3M, ESPE) and CeramX™ Duo (Dentsply) against extracted tooth structure using the modern two layering concept. Fifty six extracted anterior maxillary central incisor teeth were selected which were caries free, had no surface defects and within the colour range A3, B3, C3 or D2. The teeth were randomly divided into four colour groups (A3, B3, C3 and D2), each containing 14 teeth. A class IV cavity was prepared on all the teeth and the two composite materials were used alternately with no bonding agent to restore the cavity. The colour of both composites was assessed immediately after restoration, 24 hours and after two weeks using the SpectroShade™ (MHT) spectrophotometer. The MHT SpectroShade™ version 3.3 software was used with the CIE L*a*b* colour system to evaluate the colour of the teeth and restorations. The Kruskal-Wallis One- Way analysis of variance was used to compare the differences between the medians of the two composite materials. The significance was set at z>3.1237. The Spearman’s rank correlation coefficient was set at a significance of p<0.01 to evaluate colour change (_E*ab) in the restorations over three time intervals (immediate restoration, 24 hours and two weeks).
The colour stability of various glass ionomer cements
(University of the Western Cape, 2019) Karjiker, Farzana; Moodley, Desigar; Khan, Saadika
Introduction: Together with bonding to both enamel and dentine, an ideal restorative material would display physical properties similar to that of natural tooth tissue and would not be prone to degradation as a result of the oral environment. This includes changes in colour. Glass ionomer technology has undergone many changes to its original chemistry since it was developed in the early 1970’s. In 1988 resin-modified glass ionomers were introduced and in 2008, nano-ionomers were introduced. As a result of the progression in material sciences and the use of more sophisticated techniques and methods in restorative dentistry, it is possible to accomplish much improved aesthetics and functional durability of a restoration, both anteriorly and posteriorly. However, for as long as aesthetic restorations have been available, and in spite of advances in material structure and performance, one of the greatest challenges facing clinicians still remains that aesthetic restorations have to be replaced relatively frequently as staining and discolouration is a common problem. Aim of the study: The aim of this study was to determine the stainability of four resin-modified glass ionomers and one glass ionomer cement when exposed to a staining broth. Objectives: To record any change in colour before and after exposing the sample with the staining broth using a spectrophotometer, to compare the stainability, to examine the depth of staining using a light microscope and to observe the particle size of the powder and the surface texture using Scanning Electron Microscopy of the four resin- modified glass ionomer cements and one glass ionomer cement. Materials and Methods: Four resin-modified glass ionomers (one nano-ionomer) and one glass ionomer (zinc-reinforced ionomer) were selected. All were shade A2, except for Vitremer™ which was not available in A2. 15 discs of each material were prepared. The discs were 15 mm in diameter and 2 mm in thickness. All the materials were handled and cured according to the manufacturers’ instructions. After curing, only one side of each disc was polished using Sof-Lex™ discs (3M ESPE, USA). The unpolished side of each disc was designated as a matrix finish. The specimens were all immersed in distilled water at 37 °C for one week. They were then immersed in a staining broth for a period of one week and readings were taken after a period of 2 hours, 4 hours, 8 hours, 24 hours and one week. Colour was read on each side of each disc at the indicated intervals with a spectrophotometer. The colour difference was calculated using the CIELAB colour co-ordinates. Sample discs were then sectioned to determine the depth of staining. An additional sample disc of each material was made for observation with the SEM and was therefore not stained. Also, an unmixed sample of each material was prepared for examination with the SEM. Results: In general, for all materials there was an increase in staining when assessed with the colour difference between the baseline colour and the 7 day reading. Ketac™ N100, showed the highest total colour change of 43.84 for the unpolished surface followed by Riva™ which showed the total colour change of 28.55 for the unpolished surface. This was similar to Fuji II LC® which had a total colour change of 28.16 for the unpolished surface. For Vitremer™, the total colour change increased to 18.07 for the unpolished surface. For the unpolished surfaces, ChemFil™ Rock showed the least colour difference from baseline to 7 days (ΔE*ab = 10.45), followed by Vitremer™ (ΔE*ab = 18.07). Both Fuji II LC® and Riva™ Light Cure showed similar colour change from baseline to 7 days for unpolished surfaces (ΔE*ab of 28.16 and 28.55 respectively). Ketac™ N100 showed the highest staining after 7 days in the staining broth with a colour difference of 43.84. For the polished surfaces, the colour change for Fuji II LC® was 25.72 which was similar to Riva™ Light Cure which was 22.44 and Ketac™ N100 which showed a colour change of 22.79 on the polished surface. ChemFil™ Rock showed the least colour change of 17.69 for the polished surface followed by Vitremer™ which showed a colour change of 23.63 for the polished surface. Thus, for both the unpolished and polished surfaces there was a similar staining pattern. Conclusion: In this study it was demonstrated that all products evaluated in this study showed some degree of staining when exposed to a staining broth when evaluated using the ΔE*ab CIELAB colour evaluation. Ketac™ N100 showed the highest colour change compared to the other materials, but the reason for this was not explored. Both Vitremer™ and ChemFil™ Rock showed similar patterns of staining.
A comparative study to evaluate patient satisfaction with conventional dentures and implant retained overdentures
(University of the Western Cape, 2006) Al-Makki, Amjad; Osman, Yusuf I.; Wilson, V.J; Dept. of Restorative Dentistry; Faculty of Dentistry
The edentulous jaw is a common feature in elderly patients that had lost their teeth during life due to local reasons such as poor oral hygiene and dental caries as well as periodontal disease. Hence these patients are the victims of biological phenomenona that lead to difficulties in different aspects of patient comfort with dentures. Clinicians are always concerned to minimize these difficulties and increase patient comfort through manufacturing a proper prosthesis to substitute for the loss of the natural teeth as well as the surrounding structures for optimum satisfaction and improved quality of life of the patient. The aim of this study was to evaluate patient satisfaction regarding function and aesthetics with conventional mandibular dentures and implant retained mandibular overdentures in denture wearers.
Comparison between immediate and conventional implant loading for fixed and removable prosthesis
(University of the Western Cape, 2022) Palanyandi, Celeste; Khan, Saadika
Literature states that different loading systems have been explored; and are used depending on the clinical situation. The success with each of these systems also differs with regards to quality of bone, the length and diameter of an implant, whether the implant is placed anteriorly or posteriorly, as well as number of implants inserted. This thesis will focus on these aspects to better guide clinical decision makers and practitioners on deciding which loading system can be best suited for the patient. Different types of loading systems include immediate, early, and conventional dental loading. Immediate loading refers to a prosthesis being attached to an implant within 24 hours.
Comparison of retentive properties of two attachment systems in mandibular overdentures - an in vitro study
(2013) Satti, Asim Alsadig; Patel, N.; Peck, M. Thabit
Aim: The aim of this study is to test and compare the retentive properties of two types of attachments i.e. Locator® and OT equator in a mandibular overdenture placed over 2 implants.
Comparison of time taken and breakage of six different endodontic systems to prepare molar teeth
(University of the Western Cape, 2006) Brittain, Roger; Saayman, C.M.; Dept. of Restorative Dentistry; Faculty of Dentistry
The purpose of this study was to determine duration time, breakage and apical displacement, whilst using six different endodontic filing systems to prepare molar teeth. A total of 96 molar teeth were used in the study, divided equally, ie 16 teeth per system selected randomly, totalling 48 canals per system. A standardised access cavity was prepared for all the teeth before selection. The canals were filed according to the manufacturers’ guidelines. The result showed that PROTAPER®, K3™ and the combination of: HERO Shaper®, HERO Apical® and Endoflare® (Referred from hereon as HERO System for convenience) were statistically faster than PROFILE® and FlexMaster®, which were in turn faster than AETTM. Although breakage did occur in K3™ and HERO System this was not deemed statistically significant. Apical displacement occurred in the form of Type 1 in the AETTM, PROFILE® and HERO System, but once again this was not statistically significant. It was concluded that more aggressive cutting features such as a positive rake angle, pyramidal shaped tip, progressive taper and absence of radial lands, if present, could have enabled K3™, HERO System and PROTAPER® to have faster times, and in addition these features did not compromise these systems with regard to apical foramina transportation and breakage.
Current prevalence and preferences for immediate loading of fixed completearch implant-supported prostheses: A survey among South African Prosthodontists
(University of Western Cape, 2021) Julyan, Jennifer; Maart, Ronel
Edentulism negatively impacts patients􀂶 quality of life. A fixed complete-arch implant-supported prosthesis is proven to restore function and aesthetics and is associated with high patient satisfaction. An immediate loading protocol can provide patient satisfaction in a shorter period, as the time between surgical implant placement and connection of a prosthesis is lessened. The many considerations involved in this type of treatment are either based on available evidence or the preferences of the clinicians themselves.
Dentine permeability and cytotoxicity of a dentine bonding agent
(University of the Western Cape, 2006) Du Bois, Alexander Hermann; Grobler, S.R.3; Dept. of Restorative Dentistry; Faculty of Dentistry
The objectives of this study were to create an in vitro situation which closest resembled the clinical situation by inclusion of human dentine discs at a specified anatomic location as barrier and evaluating if comparable or graded perfusion could be identified as well as whether a link existed between dentine thickness and permeability. The other leg of the study was to evaluate the cytotoxicity of Xeno III, one of the newly released new generation dentine bonding agents and to evaluate its cytotoxicity in an in vitro pulp chamber device, determining which thickness of dentine would be able to protect the dental pulp from noxious substances in the bonding agent.
Do complete dentures improve the quality of life of patients?
(University of the Western Cape, 2006) Adam, Razia Zulfikar; Geerts, G Prof; Lalloo, R Prof; Dept. of Restorative Dentistry; Faculty of Dentistry
Few studies have documented the impact of complete dentures on patients’ oral health-related quality of life. Objectives: The purpose of this study was to investigate the relationship between gender, age, socioeconomic status and denture satisfaction

Browse

Browsing by Title

Results Per Page

Sort Options