摘要:

SummaryThe extent and rate of occlusal attrition in relation to degenerative arthritis of the temporomandibular joint were studied in 101 skulls representing early Aboriginal man in Australia. Joint degenerations affected 40% of the specimens and were associated with both the rate and extent of tooth attrition. Age, unaccompanied by tooth wear, was not significant in the progress of the disease. Degenerations affected the temporal joint surface more frequently than the condyle, particularly in the lateral and central regions of the articular eminence.Patterns of degenerative joint disease in the Aboriginals illustrated a break‐down in the physiological adaptability of the masticatory system resulting from increased occlusal stress consequent upon progressive tooth wear. Under these conditions, the teeth and the temporomandibular joints enter a ‘wear‐out’ phase of occlusal function which usually commences in early adult life and becomes more severe as the conditions c

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00504.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

SummaryIn this study diametral tensile strength and microhardness of composites were investigated in relation to various temperatures during curing. It has been demonstrated that temperatures elevated up to 60°C can improve the mechanical properties considerably. Also the stability of the resin system in aggressive environments was improved due to more efficient cross‐linking. Thermal analysis of the material showed an endothermic reaction between 60 and 70°C that is believed to be responsible for the initiation of the extra cross‐linking. Heating of composite fillings during clinical use is sugg

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00505.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

SummaryA major advance in endosseous implantology hinges on the coating of titanium implants by porous biodegradable, bioreactive tricalcium phosphate ceramic. When implanted into alveolar bone by a careful technique, the ceramic is resorbed to be replaced by bone. As a result, the endosseous implant becomes ankylosed to the bone. This represents a stable implant/bone interface as opposed to the unstable connective tissue interface that encapsulates many other implant devices.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00506.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

SummaryA photographic method for assessing colour change was compared with an instrumental colorimetric procedure. Two denture base resins were stained in various solutions. Optical density changes of colour transparencies were measured with a transmission densitometer. Good agreement with the colorimetric technique was obtained after 15 days of staining over a range of F‐stops and bandpass filter

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00507.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

SummaryFunctional mesio‐occlusion is thought to be uncommon, but, as observed in dental clinics, it may be sometimes mistaken for a true anterior cross‐bite, and unfortunately patients are left without any treatment or they are treated improperly. This may result in mandibular dysfunction and unattractive appearance. There are some clinical methods for the diagnosis of functional malocclusion. They include occlusal analysis on an articulator, radiographic cephalometry, temporomandibular joint radiography, mandibular kinesiography, electromyography and so on. In this article, functional mesio‐occlusion is illustrated using these scientific methods and based on clinical cases to complete oral rehabilit

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00508.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

SummaryDeionized water exerts a solubility effect on enamel which is increased in the presence of sodium dodecyl sulphate (SDS), at a concentration used in dentifrices.As expected, incorporation of fluoride by enamel decreases the solubility effect of the detergent in water and acidic buffer. With duration of treatment, the detergent has a lesser effect than demineralized water alone on subsequent solubility of enamel in acidic buffer.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00509.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY

摘要:

SummaryThe study reported compared the positions of the horizontal axis of rotation of the condyles when R.A.P. registrations were taken on seven subjects using: (1) An anterior jig with chinpoint guidance.(2) An anterior jig with chinpoint guidance and applied muscle force by the subject.(3) An anterior jig with bilateral manipulation (i.e. bilateral support of the body of the mandible by the operator).The results showed that the most superior positions were obtained with the technique using the anterior jig with chinpoint guidance and applied muscle force, which was also the most inconsistent technique. The technique using the anterior jig with chinpoint guidance was most consistent, and the mean difference between retruded axis position and intercuspal position using this technique was 0.31 mm on the right side and 0.34 mm on the left side.

ISSN:0305-182X    

DOI:10.1111/j.1365-2842.1981.tb00510.x

出版商:Blackwell Publishing Ltd    

年代:1981

数据来源: WILEY