bluuebunny/crossref_metadata_2025_split huggingface dataset:
Evaluation of proximal contacts with shim stock
Authors: BOICE P. A. , NILES S. M. , DUBOIS L. M. 
Published: June 2007

SummaryA total of 969 proximal contacts in forty volunteer subjects was examined for proximal contact integrity with shim stock. It passed uninhibited through 88% of the contacts. Neither sex nor age affected the evaluation; however, shim stock was more likely to pass through contacts with enamel surfaces than those which were restored.
A biometric comparison of face shape with denture tooth form
Authors: SELUK L. W. , BRODBELT R. H. W. , WALKER G. F. 
Published: June 2007

SummaryDentist and patient preferences are often used to select replacement teeth in prosthodontics. Face shape compared with inverted tooth form classifications based on Leon Williams's work are currently used. Shapes of teeth and faces have been referred to as square, ovoid or tapered, or some combination of these.Six patients, three male and three female, were selected as being classically square, tapered or ovoid in facial form. Three sets of dentures had been made for each patient with tapering, ovoid and square denture teeth. Using a standardized photographic technique, full face views with profiles and close‐ups of the teeth were taken. Then from standardized enlarged tracings, key anatomic and derived points were marked, digitized and computer analysed. The face shapes and inverted tooth forms were digitized in the same manner.A comparison of tooth moulds versus the actual denture teeth shows a highly significant difference (P<0.001) between set and unset denture teeth. There is also a significant difference (P<0.001) between facial form and denture teeth using temporal zygomatic and gonial widths for faces, compared with incisal, contact, and cervical widths for the teeth.
Denture stomatitis: a review
Authors: ARENDORF T. M. , WALKER D. M. 
Published: June 2007

SummaryDenture stomatitis has been reported in 11–67% of complete denture wearers. It is more common on the palatal mucosa and in female patients. In Newton's type I denture stomatitis, where the inflammation remains focal, trauma seems to be responsible. In Newton's types II and III denture stomatitis, where the denture‐bearing mucosa is diffusely involved, most workers assert that the aetiology is multi‐factorial. Evidence is presented incriminating Candida albicans colonization of the fitting surface of the prosthesis in many cases of denture stomatitis promoted by continuous denture wearing. Allergic and primary irritant reactions to the denture base material, systemic predisposing factors including dietary deficiency and haematological disorders, also play a part. In most cases of denture stomatitis, elimination of denture faults, control of denture plaque and discontinuous denture wearing are sufficient treatment. The routine use of antiseptic or antimycotic drugs seems unnecessary.
The influence of enamel prism orientation on leakage of resin‐bonded restorations
Authors: CRAWFORD P. J. M. , WHITTAKER D. K. , OWEN G. M. 
Published: June 2007

SummaryA new method is described for the quantification of leakage between etched enamel and restorative resin. A significant correlation was demonstrated between the plane of enamel section prior to etching and subsequent leakage. It is suggested that these findings will be of value in the design of cavities for use with the acid‐etch technique; when possible, enamel should be prepared to expose prisms transversely prior to etching and bonding.
Stability of ceramic pigments for maxillofacial applications
Authors: SELUK L. W. , YU R. , KORAN A. 
Published: June 2007

SummaryIn this study samples made from pigmented porcelain and Silastic 44210 were evaluated for colour stability after accelerated ageing in order to determine the potential of coloured ceramic powders as maxillofacial pigments. These pigments demonstrated good clear colour stability compared with the same pigments which were not incorporated into a porcelain matrix.
Subjective need of removable denture treatment in Finnish adults
Authors: NYYSSÖNEN V. , LAPPALAINEN R. , HONKALA E. , MARKKANEN H. , PAUNIO I. 
Published: June 2007

SummaryThe aim of this study was to analyse the clinical dental health, use of dental services and socio‐economic factors correlating with the subjective need for removable dentures in Finnish adults aged 30 years and older. A total of 2528 persons who had lost one or more natural teeth (wisdom teeth excluded) and who had not been provided with any dentures, were selected for this study. Subjects who had subjective need for prosthetic treatment had statistically significantly fewer teeth and fewer fillings, and more decayed teeth than others. Irregular users of dental services felt the need for a prosthesis more often than did regular users of those services. Irregular brushing of teeth was also associated with a greater need for prosthetic treatment. Men, older individuals and persons with less education and a smaller family income felt the need for prosthetic treatment more often than women, younger individuals and better educated persons.The factors differentiating between the two groups with and without a subjective prosthetic treatment need were analysed by discriminant analysis. The best differentiating factors were frequency of dental visits, caries score, frequency of brushing teeth, family income, number of fillings and sex.
Occlusal interferences related to dental panoramic radiographic changes in subjects treated with fixed prosthesis
Authors: ETTALA‐YLITALO U.‐M. , SYRJÄNEN S. , MARKKANEN H. 
Published: June 2007

SummaryBecause of contradictory reports between clinical and radiographic findings, occlusal analysis correlated to dental panoramic findings was completed in 147 patients treated with fixed prosthesis. Both occlusal interferences and radiographic changes in the TMJ area and/or in dentition were frequently discovered. Dysfunction and occlusal indices gave statistically significant correlations to radiographic changes (P<0.01 and P<0.05, respectively) in the TMJ area. Periodontal changes with vertical bone pocket formation and sclerotic lamina dura seem to be early radiographic findings and occlusal interferences were the only means to give a clear‐cut correlation to the radiographic changes (P<0.001). However, if periodontal tissues with supporting bone structure fail to respond to occlusal trauma, changes in the TMJ area will probably appear. From the clinical changes the deviation on mouth opening, tenderness to palpation of TMJ, and slide from retrusion to intercuspidation (RP–IP) explained most of the radiological TMJ changes when tested by the discriminant analysis. The value of radiographic follow‐up of subjects following prosthetic treatment is emphasized.
Anatomical and electromyographic studies of the lateral pterygoid muscle
Authors: WIDMALM S. E. , LILLIE J. H. , ASH M. M. 
Published: June 2007

SummaryThe relationships of the lateral pterygoid muscle within the infratemporal fossa were observed by conventional dissections and by examination of specimens sectioned in the horizontal and frontal planes. The following less well‐known features were noted. At the origins of the superior and inferior heads there are regions in which the fibres are interlaced or closely overlapped by fibres of either the temporalis muscle or the medial pterygoid muscle. Fibres of the superior head insert not only into the meniscus of the temporomandibular joint, but also into the pterygoid fovea at the neck of the mandibular condyle. Specimens sectioned through the origin of the inferior head of the muscle show internal tendon lamellae consistent with a pennate structure.Electromyographic (EMG) activity was recorded in five healthy subjects using concentric needle and fine‐wire electrodes. Strong to very strong activity was consistently observed in the superior head during clenching and tooth gnashing. The inferior heads were silent or had negligible to slight activity most of the time during ipsilateral movements or clenching, but were co‐activated bilaterally, with strong to very strong activity during jaw opening, protrusion, swallowing, tooth gnashing and during passive retrusion. They showed marked activity unilaterally during contra‐lateral movements.
An evaluation of a lathe‐cut high‐copper amalgam alloy
Authors: KNIBBS P. J. , PLANT C. G. , SHOVELTON D. S. , JONES P. A. 
Published: June 2007

SummaryModification of an amalgam alloy may give rise to improved physical properties. The physical properties of a newly formulated, single‐composition lathe‐cut amalgam alloy were studied and found to be superior to those of a conventional lathe‐cut amalgam alloy. However, such modification in formulation may result in changes in the clinical handling properties of the material. The high‐copper amalgam alloy was assessed by a panel of general practitioners who found that the general handling properties of the material were similar to those of conventional lathe‐cut amalgam alloys.The longer term performance of the high‐copper alloy was assessed by means of a blind, controlled clinical trial carried out by two operators. A 1‐year assessment of the resulting restorations and tooth replicas could not distinguish between the high‐copper alloy and a conventional alloy. The two alloys had both given good clinical results.
Mandibular dysfunction in an institutionalized and predominantly elderly population
Authors: MacENTEE M. I. , WEISS R. , MORRISON B. J. , WAXLER‐MORRISON N. E. 
Published: June 2007

SummaryOral health problems were identified among 653 residents of 40 long‐term care institutions in Vancouver, using a personal interview and a dental examination. Information on jaw function was analysed as part of this investigation to identify associations between the clinical signs of mandibular dysfunction and the complaints of the subjects, their occlusal instability, and the quality of their dentures. The sample population were predominantly female and over 75 years of age, and 42% had some natural teeth. Complaints of jaw dysfunction, usually sore muscles, were heard from 13% of the 488 subjects interviewed. The examination was performed on all of the subjects and revealed that 43% had unstable occlusal contacts, 37% were using loose or unstable dentures, and 20% had one or more clinical signs of jaw dysfunction. Joint noise was the most frequent sign detected and it was heard in a greater percentage of the women than men, while deviation of the mandible during mouth opening was observed with great frequency in the younger age groups. There was no apparent association found between the clinical signs of jaw dysfunction and the complaints of the subjects or the condition of their teeth or dentures. The study demonstrated that complaints and clinical signs of jaw dysfunction, with the exception of joint noises, were uncommon in this population.
Follow‐up study of patients with bridge constructions performed by private dental surgeons and at a university clinic, 8 years following insertion*
Authors: ÖDMAN P. A. , KARLSSON S. 
Published: June 2007

SummaryPatients treated in private practice and patients treated at the Department of Prosthetic Dentistry of the Faculty of Odontology in Gothenburg with fixed bridgework were questioned about their experience of their bridges. The interview was carried out with questionnaires and in some cases by telephone. The results were similar in both groups, and the patients were satisfied with the treatment.
Tissue response to implanted ceramic‐coated titanium alloys in rats
Authors: SATOMI K. , AKAGAWA Y. , NIKAI H. , TSURU H. 
Published: June 2007

SummaryIn order to assess the tissue compatibility of the hybrid materials for the dental implant (hydroxyapatite, titanium oxide and titanium nitride coated titanium alloys), tissue response to these materials implanted in the rat subcutaneous tissue was histologically examined. Initial inflammatory response was less evident in titanium oxide coated and non‐coated titanium alloys. All materials were encapsulated by thin fibrous connective tissues. The membrane thickness of hydroxyapatite coated titanium alloy was significantly higher than that of titanium nitride coated one. These results suggest that all materials possess favourable tissue compatibility and may encourage clinical use as the dental implant.
The effects of mixing capsule geometry on the early compressive strength of dental amalgam
Authors: PEARSON G. J. , ATKINSON A. S. 
Published: June 2007

SummaryThree dental amalgams were mixed in a number of different mixing capsules. Compressive strength specimens were prepared using a clinically relevant technique and tested at 1 h and 7 days. The results showed that the early compressive strength of an alloy was influenced by the mixing capsule, and suggested that internal capsule geometry may be an important contributary factor in capsule performance. With one exception, there was a marked difference between the compressive strengths produced under the present method and those reported by manufacturers under test conditions laid down in standards specifications.
In vitro temperature rises during visible‐light curing of a lining material and a posterior composite
Authors: SMAIL S. R. J. , PATTERSON C. J. W. , MCLUNDIE A. C. , STRANG R. 
Published: June 2007

SummaryThe aim of this study was to measure the rise in temperature during: (i) a single cycle of a curing light unit, (ii) the polymerization of a layer of light‐cured lining material, and (iii) the polymerization of a light‐cured posterior composite material, and also during combinations of these individual procedures. Experimental work was undertaken in vitro and measurements were made using a thermocouple placed centrally in an insulated PTFE well. Large temperature rises occurred with the use of the curing light alone. The lining material itself did not contribute significantly to the rise in temperature during curing, nor did it provide thermal insulation from the output temperature emitted by the light guide. The presence of a layer of posterior composite reduced the temperature transmitted from the light but the residual temperature rise transmitted was still of such a magnitude as to cause concern regarding possible thermal injury to the pulp.
The value of the Gothic arch tracing in the positioning of denture teeth
Authors: EL‐GHERIANI A. S. , WINSTANLEY R. B. 
Published: June 2007

SummaryTwenty‐five subjects of three nationalities carried out Gothic arch tracings. Measurements between the side arms were compared with the upper intercuspid distances measured in the same subjects. A relationship was found which may be of value in the setting up of anterior maxillary denture teeth.
The effect of variation of residual ridge angle on partial denture abutment tooth movement
Authors: FEINGOLD G. M. , GRANT A. A. , JOHNSON W. 
Published: June 2007

SummaryUsing a laboratory model simulating a free‐end saddle partial denture situation, the effect of variation of the angulation of the crest of the residual alveolar ridge to the horizontal on movement of the abutment tooth and saddle was observed. It was found that the inclination of the residual ridge affected the direction and magnitude of abutment tooth movement. The direction of abutment tooth movement was not related to the position of the occlusal rest. However, the magnitude of saddle and abutment tooth movement is affected by the design of the clasp used.
Determination of vertical dimension by hydraulic intraoral jack
Authors: LoSCHIAVO M. , MADHAV S. , WHYMAN R. 
Published: June 2007

SummaryThis paper describes the application of a hydraulic intraoral jig to the establishment of the vertical dimension of occlusion for full denture construction. The device enables the patient to establish an occlusion height which is most comfortable without the intervention or guidance of the dentist. Six patients for whom new dentures were to be constructed in the University of Otago School of Dentistry were invited to participate in the study. A conventional technique of denture construction was employed, but an additional stage was introduced after the jaw records had been taken and the casts mounted. Each patient was instructed in the use of the hydraulic jig and was asked to find a comfortable bite height in his own time. The results were compared with occlusal heights determined by conventional subjective methods. The former results proved to be more repeatable than those utilizing rest position and an average free‐way space. The results are discussed and the implications outlined. Suggestions for further research using the hydraulic jig are made and the authors conclude that the hydraulic jig may be used to determine vertical dimension for full denture construction.
Inhibition of bacterial colonization by antimicrobial agents incorporated into dental resins
Authors: BAPNA M. S. , MURPHY R. , MUKHERJEE S. 
Published: June 2007

SummaryThe antimicrobial activity of several chemical agents was determined by incorporating these agents into dentine adhesive resin and following the colonization of Streptococcus mutans on the surfaces of the resin and culture vessel, as well as in the surrounding medium, by optical density measurements. It was found that sodium fluoride and dodecylamine, an organic amine, exhibited excellent antimicrobial properties. These chemicals not only inhibited bacterial growth completely but also seemed to reduce the adhesion of the bacteria to the resin surface. A silver compound, protargin, was mildly effective in inhibiting growth ofS. mutans. Copper oxide and chelating acids such as vanillic acid, syringic acid, and ethylenediamine‐n, n'diacetic acid (EDDA) were not effective as antimicrobial agents againstS. mutans.
Signs and symptoms of mandibular dysfunction in shortened dental arches*
Authors: WITTER D. J. , VAN ELTEREN P. , KÄYSER A. F. 
Published: June 2007

SummaryIn this study subjects with shortened dental arches (SDA, n=60), characterized by the absence of molar support, are compared with subjects with a complete dentition (n=72) with respect to signs and symptoms of mandibular dysfunction.The subjective examination consisted of questions related to pain, noises within the joints and mobility of the lower jaw. The objective examination consisted of the registration of clicking of the temporomandibular joint (TMJ) by bilateral palpation and measuring the maximal mouth opening.In spite of the finding that significantly more subjects of the SDA group under 40 years of age reported pain in or around the TMJ, it is concluded that in the population studied no convincing evidence was found that a SDA provokes signs and symptoms of mandibular dysfunction.
Histological and histomorphometrical analysis of bioactive glass and fibre reinforced bioactive glass dental root implants
Authors: SCHEPERS E. , DE CLERCQ M. , DUCHEYNE P. 
Published: June 2007

SummaryBioactive glass has the ability to bond with bone, but it cannot be used as a load bearing device due to its limited mechanical properties. By reinforcing bioactive glass with a ductile second phase, a structurally reliable material is obtained.The aim of the present study was to evaluate histologically and morphometrically the interfacial behaviour of submerged composite dental root implants. Therefore, bulk and composite implants were subgingivally installed in the partially edentulous jaws of Beagle dogs and harvested after 4 and 16 months.Histologically, the connection between the implants and bone tissue could be clearly demonstrated. This bone connection is mainly located at the cortical bone level. In the vicinity of the infraalveolar nerve a fibrous tissue contact was found.It is shown that surgical trauma, motion at the glass to tissue interface, and gross ion dissolution from the material adversely affect the interfacial osteogenesis. If these factors are controlled, bone bonding is found over a larger area than the initial area of contact between the implant and bone tissue. This means that bone grows out along the implant surface, starting from the initial contact area.No difference was observed between the interfacial behaviour of bulk bioactive glass and intact fibre reinforced bioactive glass implants.
Condition of prosthetic constructions and subjective needs for replacing missing teeth in a Finnish adult population
Authors: TERVONEN T. 
Published: June 2007

SummaryProsthetic treatment needs were studied in a sample of 1600 adults distributed equally into cohorts aged 25,35,50 and 65 years. A total of 1275 subjects (80%) were clinically examined with respect to the condition and age of existing prosthetic constructions, subjective needs for replacing missing teeth and the frequency of oral mucosal lesions associated with the wearing of dentures. Approximately half of the removable dentures (56%) were objectively non‐acceptable and one‐third (36%) subjectively so. One in four of those subjects with missing anterior teeth and premolars, or with 0–2 remaining mandibular molars and one in five of those with 0–2 remaining maxillary molars expressed a need to have one or more of the missing teeth replaced. The replacement needs were slightly greater for missing anterior teeth and premolars than for molars. Subjective needs for replacing missing teeth were greatest at the age of 50 years. The condition of removable dentures according to objective assessment was poorest among those aged 65 years. A high frequency of mucosal lesions associated with old and non‐acceptable removable dentures was observed.
Wearing of removable partial dentures in relation to dental caries
Authors: TUOMINEN P. , RANTA K. , PAUNIO I. 
Published: June 2007

SummaryUsing a representative sample of 5028 dentulous Finnish adults the occurrence of dental caries was studied among removable partial denture (RPD) wearers and non‐wearers. Of the subjects wearing no RPD(s) 61·4% had one or more carious teeth, among those wearing a single RPD the figure was 60·5% and among those wearing RPDs in both jaws 62·7%, respectively. When sociodemographic background, other oral status measures than caries and oral health care habits were simultaneously controlled, subjects wearing RPDs in both jaws had slightly increased (P≥0·05) probability of having one or more carious teeth compared to those with no RPD(s). Subjects with a single RPD did not have a statistically significantly increased probability of having carious teeth. Among those 3075 subjects who had one or more carious teeth the wearing of one or two RPDs did not significantly increase the number of carious teeth. Because the subjects wearing RPDs in both jaws were seen to have a slightly increased risk of having caries, this confirms the view that dentists should emphasize good oral hygiene habits and regular dental attendance among RPD wearers.
Bulk fracture of amalgam restorations—a 5‐year controlled clinical trial*
Authors: LEMMENS P. L. M. , LETZEL H. , PETERS M. C. R. B. , VAN'T HOF M. A. T. 
Published: June 2007

SummaryA controlled clinical study, containing 720 posterior amalgam restorations placed in a group of 103 adult patients by three dentists, was used for examination of the influences on the incidence of occlusal and approximal bulk fractures. These fractures were evaluated from black and white photographs, taken annually, of the occlusal surface of the restorations over a 5‐year period, using a three point photorating scale for both fracture sites.The influence of the dentist as well as the influence of the alloy and tooth type were statistically analysed. The results of these analyses demonstrated that the dentist, as well as the alloy and tooth type, have a statistically significant influence on the incidence of bulk fracture of amalgam restorations.