bluuebunny/crossref_metadata_2025_split huggingface dataset:
Teeth in cross‐bite: the role of removable appliances
Authors: Jacobs Stanley G. 
Published: May 2009

AbstractThe role of removable appliances with springs for the treatment of teeth in anterior and posterior cross‐bite is discussed. The indications for their use (that is, case selection), and their manipulation are examined. Cases are presented where removable appliances are the appliances of choice in the first stage of the correction of a posterior cross‐bite, the final treatment being completed with fixed appliances. The ease of correcting and retaining various maxillary teeth which may be in cross‐bite is discussed.
Discriminant function analysis of clinical and psychological variables in temporomandibular joint pain dysfunction
Authors: Gerke D. C. , Richards L. C. , Goss A. N. 
Published: May 2009

AbstractDetailed clinical, psychological and illness behaviour information was obtained from 43 patients with temporomandibular joint pain dysfunction. A discriminant function analysis was performed on the multiple variables to test their effectiveness as predictors of a successful response to simple conservative therapy. The questionnaire and statistical methodology employed are described in detail. It was found that clinical, psychological, and illness behaviour factors when used alone were poor predictors (less than 60 per cent) of treatment outcome. However, grouping clinical and psychological factors resulted in over 80 per cent successful prediction.
Clinical evaluation of six composite resins in posterior teeth
Authors: Tyas M. J. , Truong V. T. , Goldman M. , Beech D. R. 
Published: May 2009

AbstractSix different composite resin restorative materials were placed in posterior Class I and Class II cavities and evaluated at one and two years after placement for colour, marginal discoloration, and wear. Wear was determined by comparison with standard models and by SEM. All materials darkened over the study period but remained an acceptable match. Marginal discoloration increased. The trend of relative wear was in accordance with predictions from fracture mechanics. Insufficient restorations in one material were available at two years for it to be included in the results. The microfine materials used in this study suffered surface damage (microchipping) in high stress areas, again consistent with fracture mechanics predictions.
The anatomic relationship of the insertion of the superior lateral pterygoid muscle to the articular disc in the temporomandibular joint of human cadavers
Authors: Wilkinson Tom , Chan Eugene K. K. 
Published: May 2009

AbstractConfusion has existed as to whether the major insertion of the superior lateral pterygoid muscle is into the articular disc or the condyle. Five human cadaver joints were studied under the dissecting microscope. This allowed superior lateral pterygoid fibres to be selectively placed under tension to determine their point of insertion and to examine the integrity of the anterior joint capsule. All superior lateral pterygoid fibres gained either direct or indirect insertion to the condyle. A classification for the variation in insertion is suggested. The fibres of the anterior joint capsule extended from the anterior rim of the condyle to the roof of the infratemporal fossa but under the foot of the disc they blended with and became indistinguishable from disc fibres.
The etched metal/composite resin interface
Authors: Flood Andrew M. , Brockhurst Peter , Harcourt John K. 
Published: May 2009

AbstractThis study examined the interface between composite resin and two electrolytically etched alloys using different etching times. A new technique allowed this interface to be tested under both tensile and shear loading. The resultant surface morphology of the etched metal was also examined.There was a very large difference in the bond strengths and surface morphologies between the alloys. The bond strength results indicate the sensitivity of this interface to alterations in etching time, and this is also shown in the resultant surface morphology. The clinical significance of these findings is discussed and clinical recommendations made.
Multiple odontogenic keratocysts of the jaws
Authors: Yeo J. F. , Loh F. C. 
Published: May 2009

AbstractSingle odontogenic cysts are very well documented in the literature. Of those less common reports concerning multiple jaw cysts, many have been associated with systemic conditions or syndromes such as Gorlin‐Goltz or basal cell naevus syndrome, Hunter's syndrome and mucopolysaccharidosis, for example, Maroteaux‐Lamy syndrome. A case of multiple odontogenic keratocysts unassociated with any syndrome is reported so as to add to the growing number of such cases in the literature. The possibility of this case being a partial expression of the Gorlin‐Goltz syndrome is discussed.
Differential diagnosis of severe periodontal lesions
Authors: Hirsch Robert S. , Clarke Nigel G. 
Published: May 2009

AbstractIn current clinical practice, a differential diagnosis of severe localized periodontal lesions is rarely made; such lesions are considered to be manifestations of periodontitis caused by specific microbes from the commensal oral flora. However, deep seated lesions of the periodontium which are in communication with the alveolar crest, are well documented periodontal consequences of pulpal pathoses and can mimic the signs and symptoms of ‘periodontitis’. The very low incidence of tooth‐threatening periodontal disease in ancient and modern man is revealed when differential diagnoses are used in the examination of alveolar defects in anthropological materials and when epidemiological studies use more appropriate indices. However, no periodontal index to date has incorporated a differential diagnosis between gingival and pulpal causes of alveolar bone loss. The gingival and periodontal signs of severe localized periodontal lesions are reviewed and the imprecise nature of current clinical diagnostic tests (radiography, ‘pulp testing’, darkfield microscopy, bleeding on probing, periodontal probing) is discussed. None of these tests is able to detect disease activity and cannot be used to predict future patterns of disease behaviour. However, the commonly held belief that the tests are accurate has resulted in most severe periodontal lesions being falsely labelled as periodontitis. Failure to carry out differential diagnosis of severe periodontal lesions has resulted in the instigation of periodontal therapy for many lesions of non‐gingival origin. Whenever severe localized lesions of the periodontium are detected, the differential diagnosis between pulpal and periodontal origins should be made. The results of diagnostic tests in current use should be interpreted with extreme caution; clinicians are left to exercise their judgment based on consideration of all the available evidence.
Clinical evaluation of three dentine bonding agents
Authors: Tyas Martin J. 
Published: May 2009

AbstractThree commercial dentine bonding agents were used with composite resin to restore non‐undercut Class V abrasion lesions without enamel etching. Patients were reviewed at 3, 6 and 12 months and the integrity and marginal staining of restorations was assessed.The loss incidence of restorations ranged from 18 to 40 per cent at one year, and there was increasing evidence of marginal staining over the evaluation period.Comparisons are made with other commercial dentine bonding agents from previous studies in this series.
Survey of dental practice/dental education in Victoria Part I. Questionnaire/general aspects
Authors: Stewart Barry L. , Ralph William J. , Macmillan Cleo H. 
Published: May 2009

AbstractA questionnaire was designed to canvass the opinions of dentists registered with the Dental Board and resident in the State of Victoria, with a view to assessing the present undergraduate curriculum in relation to clinical dental practice. All respondents were requested to provide information about age, sex, registration, type/location of practice and qualifications. The questionnaire sought opinions from all respondents regarding the priority to be given to basic sciences and medical sciences as well as the introduction of topics not presently included in the undergraduate course. Questions were also posed in relation to physical assessment of applicants for the dental course, the timing of introduction to clinical procedures and the desirability of an intern year (Section A). Other sections were designed to ascertain the current trends and busyness of general dental practice (Sections B and C) and of restricted/specialist practice (Sections C and E), the views of recent graduates and postgraduates with respect to the appropriateness of their training for clinical practice (Sections D and F, respectively) and, in a separate questionnaire, the perceived views of graduating students with respect to their training for registration as dentists. The results of the survey were prepared in the form of four papers, namely, General aspects (Part I), Recent graduates/‐graduating students (Part II), Current trends in general dental practice (Part III) and Specialist dental practice (Part IV).This paper deals with the results of Section A of the survey which, it is suggested, need to be considered in any review of the curriculum.
Does midazolam sedation in oral surgery affect the potency or duration of diflunisal analgesia?
Authors: Rodrigo M. R. C. , Rosenquist J. B. 
Published: May 2009

AbstractA randomized cross‐over study was carried out to determine whether midazolam in doses used for conscious sedation had any effect on the potency or duration of diflunisal, a non‐narcotic analgesic used for postoperative pain in oral surgery. Thirty‐two Hong Kong Chinese patients of either sex, aged between 16 and 28 years, were given either midazolam to supplement local anaesthesia or local anaesthesia alone at one visit and the alternative at the other visit, for surgical removal of bilateral symmetrically impacted third molars. Surgery was carried out on one side only at each visit. Diflunisal was given for postoperative pain relief. Midazolam had no effect on the potency or duration of action of diflunisal. Independent of the method, more patients had better pain relief following the second procedure than following the first, probably due to a degree of adaptation to the pain, at the second visit.
The effect of etching on a number of glass ionomer cements
Authors: Fuss J. , Mount G. J. , Makinson O. F. 
Published: May 2009

AbstractIn view of the continuing interest in the use of glass ionomer cements as a dentine substitute or base under composite resins, further investigations were carried out on the effects of the length of time of etching of the surface of the cement prior to the placement of the resin. A number of cements are available on the Australian market which are advocated for use in this technique. Each of them was subjected to etching for periods of 15, 30, 45, or 60 seconds and then stored in water for one week. Examination under a dissecting microscope and a scanning electron microscope revealed some variation in results between the different cements.It would appear that not all those materials presently marketed for this purpose are entirely suitable. Whilst 15 seconds is the preferred time for most cements, some require times up to 60 seconds to achieve the best result. Also, some of the cements showed signs of cracking, expansion and distortion after they had been stored in water for one week to allow for maturation before being prepared for viewing under the SEM. It is suggested that this group of cements is not suitable for the ‘sandwich’ technique.
Medicaments: Aids to success in endodontics. Part 2. Clinical recommendations
Authors: Abbott Paul V. 
Published: May 2009

AbstractIn order to predictably achieve bacteria‐free root canal systems, especially in pulpless teeth, it is necessary to use intra‐canal medicaments. Medicaments can also be used to influence the peri‐radicular response to endodontic treatment. Consideration of a material's therapeutic action must be made when selecting a medicament for any pathological condition. In general, only two commercial preparations satisfy the general requirements for root canal medicaments. Guidelines and the rationale for the use of these preparations are presented.
The biocompatibility testing of some dental amalgams in vivo
Authors: Ellender Graham , Feik Sophie A. , Gaviria Claudia 
Published: May 2009

AbstractThe biological responses to some dental amalgams were determined in vivo and compared with those of dental porcelain. The technique of implantation employed in the study addressed some of the vagaries of the Recommended Standard Practices for Biological Evaluation of Dental Materials (RSP) and considered both cellular responses (inflammation, infiltration and fibrogenic cell activity) and the organizational status of the resultant encapsulation. The implantation sites for both the experimental and control were biogeometrically similar, unlike those currently recommended in RSP. At the end of the test period, all the dental amalgams tested caused minor responses reflected by the formation of thin capsules with an acceptable matrix organization. The Australian manufactured dental amalgams — Permite C®, Lojic, F400®, New Ultrafine® and GS80® all produced even capsules with quiescent cells. By one hundred days, the capsule around Dispersalloy®, although generally well formed, showed some areas of cellular activity and matrix variability. The biological responses to all the dental amalgams examined were mild and considered to be acceptable for clinical usage. The matrix organization of enveloping capsules must be considered in the determination of the biocompatibility of a dental restorative material.
A method of determining residual monomer in acrylic resin using methyl ethyl ketone
Authors: Sadamori Shinsuke , Shigeto Naofumi , Hamada Taizo , Okuda Kyuichiro 
Published: May 2009

AbstractAn improved method of extraction of residual monomer from acrylic resin has been described for determination of the concentration of residual monomer by gas chromatography. Four kinds of organic solvent selected according to their physico‐chemical properties (methanol, N,N‐dimethylformamide, ethyl acetate and methyl ethyl ketone) were tested for their capacity to extract residual monomer at varying temperatures and time periods. Extraction with methyl ethyl ketone at 4°C was found to be the most effective. The method is simpler and more effective than others reported so far, and therefore seems to be suitable for clinical laboratory use.
Odontogenic tumours. A series of 409 cases
Authors: Günhan Ömer , Erseven Gülçin , Ruacan Şevket , Celasun Bülent , Aydintug Yavuz , Ergun Ender , Demiriz Murat 
Published: May 2009

AbstractReports on the incidence of odontogenic tumours are infrequent with only a limited number of series having appeared in the literature. In this paper, the results of a multicentre retrospective study on the histologic types and relative frequencies of odontogenic tumours in Turkey are presented. The results indicated that the most frequent histologic type was ameloblastoma (36.5 per cent) and the area at greatest risk for the development of odontogenic tumours was the mandibular molar region. A Table showing the most likely type of tumour by location is also presented.
Enamel defects in a fluoridated South‐East Asian community
Authors: Chellappah N. K. , Vignehsa H. , Lo G. L. 
Published: May 2009

AbstractThe prevalence and distribution patterns of enamel defects in maxillary incisors was assessed in 194 Singaporean children aged 11–15 years and belonging to three different ethnic groups. All were born and continuously resident in Singapore, which has a tropical climate. The water supply was fluoridated in 1957 at a level of 0.7 ppm. The mouth prevalence of defects was 71.5 per cent and the tooth prevalence was 55.9 per cent; 82 per cent of all affected teeth demonstrated white lesions of various forms. Although there was no sex difference in the prevalence and distribution pattern of defects, some racial differences were observed. The results were compared with data from other studies where the same classification of defects was used.
Chairside evaluation of salivary parameters in patients with tooth surface loss: A pilot study
Authors: Bevenius Joan , L'Estrange Peter 
Published: May 2009

AbstractIn cases of tooth surface loss, the possibility of an erosive component should be considered, even when the lesions have the characteristic clinical appearance of abrasion or attrition. Individual susceptibility or resistance to erosive damage has been attributed to variations in the quality of saliva. Two recent studies have indicated that rate of flow of saliva and buffer capacity may be important determinants in erosion susceptibility. These parameters may be readily assessed using the chairside kits developed in Scandinavia for assessing caries susceptibility. In eight consecutive patients referred to the University of Queensland Dental School for investigation of tooth surface loss, six had no measurable quantities of resting whole saliva, four had low values for stimulated saliva flow rates, and only two patients had buffer capacities within the normal range. The results indicate the need for a larger scale study of salivary parameters in this patient group. The chairside kits provide a simple, rapid, hygienic means of assessing salivary values.
Acid etching of a glass ionomer cement base: SEM study
Authors: Smith E. Dell Kingsford , Martin F. Elizabeth 
Published: May 2009

AbstractThe effects of acid‐etching duration on the surface of a glass ionomer cement designed for use as an intermediary layer between composite resin and dentine were investigated. Cement topography changes occurred which could be related to etch duration. When compared with enamel etched for a similar period, undue loss of cement substance was not observed for any of the etch times used.
Computerized axial tomography in the diagnosis of internal derangements of the temporomandibular joint
Authors: Anker A. H. , D'Rozario R. H. , Li S. 
Published: May 2009

AbstractFourteen patients with a history of pain, clicking and locking of the temporomandibular joint were assessed clinically and by using computerized axial tomography (CAT). The findings of the clinical and CAT scan assessment were correlated and compared with surgical observations. Computerized axial tomography scanning proved to be a highly accurate method of assessing meniscal position. With the advent of more sophisticated methods of CAT scanning, it provides an accurate, non‐invasive method of assessing the temporomandibular joint and providing a basis for more effective treatment planning of problems related to internal derangements.
The natural tooth pontic — a compromise treatment for periodontally involved anterior teeth
Authors: Walsh L. J. , Liew V. P. 
Published: May 2009

AbstractA technique which uses a natural tooth pontic to replace a periodontally compromised tooth is described. Following extraction and root resection of a maxillary central incisor, the crown was bonded to the adjacent teeth using acid‐etched composite resin located in proximal cavity preparations. Some advantages of the technique are discussed.
The partial denture over a fixed guide bar appliance: A technique for restoring partially edentulous quadrants. Case report
Authors: Poschelk Kevin K. 
Published: May 2009

AbstractReplacement of a number of lost teeth in partially edentulous quadrants has been accomplished using a technically simple Tissue‐borne, Partial Denture over a Fixed Bar (PDOFB) Appliance. The appliance offers a similar degree of comfort and aesthetic appeal to that of a fixed bridge, but is specifically designed to reduce the high occlusal loads that normally are applied to the abutment teeth during mastication. It has been used where, because of the excessive distance between the abutment teeth, or because of the poor periodontal health of the abutment teeth, the construction of conventional crowns and bridges was contraindicated.The indications for, and the construction of such an appliance are described.
Post‐insertion sensitivity with a bonded etched cast metal prosthesis. Case report
Authors: Berekally Thomas L. 
Published: May 2009

AbstractAn interesting case of post‐insertion sensitivity in a patient who had an etched cast metal prosthesis (Maryland Bridge) cemented with a recently marketed resin luting agent is discussed. This case report draws attention to the fact that despite the relative conservatism and simplicity commonly associated with abutment tooth preparation for resin bonded prostheses, dentine exposure should be avoided if possible to reduce the potential for chemical irritation of the pulp by components of the resin luting system.
Fermentable simple sugars in self‐administered medications as aetiologic agents in rampant caries. Case report
Authors: Walsh L. J. , Seow W. Kim 
Published: May 2009

AbstractSucrose is recognized as the most cariogenic carbohydrate. However, other simple sugars may act as substrates for cariogenic micro‐organisms. The clinical features of an adult patient suffering from rampant caries are described. It was considered that the predominant aetiologic factor was prolonged intake of mineral supplements which contained the disaccharide lactose. The principal caries risk factors included drug‐induced xerostomia and prolonged contact time with the substrate in a retentive form. Chemical analysis of the products revealed the presence of lactose together with starch or glucose. A strategy for preventive management prior to restorative therapy based on chlorhexidine and fluoride‐containing products was followed. Possible contributions of sugar‐containing medications to caries risk status are discussed.
Determination of adhesive bond strength to dentine. A new method
Authors: Stewart Barry L. , Harcourt John K. , Tyas Martin J. 
Published: May 2009

AbstractSpecimens for the determination of adhesive bond strength to dentine were prepared using suitable surfaces of freshly extracted teeth from 15 patients who were having immediate dentures fitted. As soon as possible after extraction, shallow cavities were cut into the dentine to a depth of 1 mm using a highspeed round bur (diameter 4.2 mm) under water coolant. The cavities were restored using dentine bonding agents and single increments of light activated composite resin. The restored teeth were cut down to approximately 5 mm in diameter and 3 mm thick and were either placed in previously prepared sites in the buccal or occlusal surfaces of their respective dentures or in containers of tap water. Patients were instructed to remove their dentures only for cleaning with a soft nylon brush and toilet soap, while the laboratory specimens were stored at ambient temperature. After one week, the tensile force needed to dislodge each restoration from its cavity was determined using a universal testing machine.Previously reported laboratory methods for bond strength determination have usually employed a flat dentine surface. However, this study more closely resembled the clinical situation in that the smear layer was produced by a rotary cutting instrument, and the effects of polymerization shrinkage when curing the composite resin were simulated. Furthermore, it was easier to confine the bonding agent to the desired dentine surface.
Prosthetic management of hypohydrotic ectodermal dysplasia with anodontia. Case report
Authors: Shaw R. M. 
Published: May 2009

AbstractThe patient in this report is a young boy with hypohydrotic ectodermal dysplasia. His case is exceptional in that anodontia was complete in both deciduous and permanent dentitions. A brief review of this condition is presented along with the prosthetic management of the case which emphasizes the need for regular modification and replacement of dentures worn by a growing child.