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PubMed1975

[Odontoanthropology].

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Age Determination by Teeth↗
PubMed1975

[Prosthetic rehabilitation of dysgnathic patients].

There are only few reports on the prosthetical care of patients with dysgnathias. Thus, it seems appropriate first to delimit the field by well-defined terms from maxillo-facial surgery and orthodontics. Reichenbach, Köle, and Brückl introduced the term "principal symptom" ("Leitsymptom") for the most significant dysgnathic finding. With a view to prosthetical aspects, this term is broadened to include primary and secondary dysgnathias, after several proposals of nomenclature were made. It is reported on the number of dysgnathic patients needing treatment. The description of some of the goals aimed at by prosthetical care concludes the paper.

Dental Occlusion, Balanced↗
PubMed1975

The mystery bridges of Martin Bormann's alleged Berlin skull--key clues for forensic identification or another Piltdown case?

Dental records prepared by Martin Bormann's dentist Dr Hugo Blaschke in 1945 have been examined in the Captured Military Record Branch of the US National Archives in 1972 and compared with the direct evidence from examination of skeletal remains unearthed in Berlin in 1972 at a site next to Lehrter RR station where Bormann is known to have been seen alive for the last time on May 2, 1945. There is adequate qualitative and quantitative concurrence between all available antemortem and postmortem dental data to ascertain that the forensic identification of Martin Bormann can be considered established.

Dental Records↗
PubMed2000

A longitudinal epidemiologic study of signs and symptoms of temporomandibular disorders from 15 to 35 years of age.

AIMS: To study the development over 20 years of signs and symptoms of temporomandibular disorders (TMD) in an epidemiologic sample and to analyze possible correlations between these signs and symptoms and some other variables. METHODS: The original group comprised 135 randomly selected 15-year-old subjects who were examined clinically and by means of a questionnaire for signs and symptoms of TMD. The examination was repeated after 5, 10, and 20 years by the same methods. After 20 years, when the original group had reached the age of 35 years, 124 individuals (92%) could be traced, and they were sent a questionnaire and invited for a clinical examination. The response rate was high: 114 subjects (92%) completed and returned the questionnaire, and 100 subjects (81%) attended the clinical examination. RESULTS: There was a substantial fluctuation of both reported symptoms and clinically recorded signs over the 20-year period, but progression to severe pain and dysfunction of the masticatory system was rare. In both the 15-year-old and 35-year-old subjects, 13% reported 1 or more frequent TMD symptoms. At age 35, only 3 subjects (3%) were classified as having severe or moderate clinical signs of dysfunction according to the Helkimo Index, fewer than in previous investigations. Women reported TMD symptoms and headache and had muscle tenderness and joint sounds more often than men. Correlations between the studied variables were mainly weak. Among the highest correlations found (rs = 0.4) were those between reported clenching and bruxing habits and TMJ sounds and jaw fatigue. CONCLUSION: In this epidemiologic sample followed from age 15 to 35 years, a substantial fluctuation of TMD signs and symptoms was found over time. Progression to severe pain and dysfunction was extremely rare.

Adolescent↗
PubMed2001

Occlusal disease revisited: Part II.

In part I of this article, the evolution of bruxism from childhood was discussed. Further, the different types of anterior tooth wear were reviewed. Specifically, the type of wear noted in bruxed-braced or cross-over position was pointed out. Examples were illustrated to allow the practitioner to recognize the type of parafunction in advance of treatment. This article will continue the discussion of cross over with moderate to extreme examples. Suggestions for treatment are discussed depending on the severity of the problem. Restorative failure and the implications for implant dentistry are noted.

Adolescent↗
PubMed2000

Enamel wear of modified porcelains.

PURPOSE: To evaluate the wear of three different modified ceramics along with a conventional porcelain and the wear of opposing enamel at initial wear cycle on a two-body and a three-body wear simulation. MATERIALS AND METHODS: Modified ceramics used in this study included a low fusing/low crystal porcelain (Finesse), a high fusing/low crystal porcelain (Softspar), and a heat-pressable ceramic (IPS Empress). A conventional porcelain (Ceramco II) was used as the control material. Hemispherical shaped ceramic styli (1/8 inch in diameter) made of respective materials were fabricated according to the manufacturers' directions. Proximal surfaces of non-carious human molars were ground flat within the enamel with a silicon carbide paper to 600 grit with copious irrigation. They were perpendicularly opposed to each other with or without intermediate material as a food bolus and subjected to in vitro wear test by a UAB wear simulator. A 75.6 N load was applied vertically onto the surface at 1.2 Hz. The surface was duplicated after respective wear cycles. Seven specimens were tested for each group of both simulations. RESULTS: The enamel wear loss when opposing the modified ceramics was less than the Ceramco II control which exhibited the greatest values. The IPS Empress material showed the least amount of wear among them. Statistically significant differences were seen between the IPS Empress and the Ceramco II for every cycle interval evaluated (ANOVA, P < 0.05). Although the enamel wear loss when opposing the IPS Empress was significantly less (ANOVA, P < 0.05) than the others until 20,000 wear cycles, no significant differences were found among the modified ceramics at the end of 50,000 wear cycles. The concentric wear patterns were already prominent at 5,000 wear cycles on two-body wear, however, the wear facet of the three-body wear was smaller (the wear depth of 0-5 microm) than the two-body wear test, as it was quite similar to the one of the two-body wear test at 100 wear cycles. On the other hand, although no statistically significant differences were found among the three modified ceramics and between the conventional porcelain and the modified ceramics at every wear cycle, the high values of the Finesse since 10,000 wear cycles were probably due to the mechanical properties of this porcelain. Moreover, on the surface of the ceramic styli at the end of 50,000 wear cycles, the glaze layer on the contact area had not yet worn off.

Aluminum Silicates↗
PubMed1998

[The study on the attrition of molars with occlusal hypersensitivity molars in elderly people].

OBJECTIVE: To investigate the attrition of molars in old people who suffered from occlusal hypersensitivity. METHODS: 113 maxillary and mandibular molars of old people (47-74 years old) who had dentine hypersensitivity caused by attrition were studied. The Lavelle's criteria were used. RESULTS: When the attrition reached to the e type, the rate of lesion rose up quickly (19.47%), the highest incidence was seen in g type (41.59%). The hypersensitivity occurred as 48.67% in the first molar, 51.33% in the second molar, 53.10% in enamel-dentin junction, and 38.05% in dentine concave site. CONCLUSION: The rate of hypersensitivity rises with the severity of attrition. There is no significant difference between the first molar and the second molar, but the incidence of hypersensitivity in enamel-dentin junction is significantly higher than in dentine concave site (P < 0.05).

Aged↗
PubMed2001

[Logistic regression analysis of wedge-shaped defects in the middle-aged and elderly].

OBJECTIVE: To investigate and identify the possible clinical risk factors associated with the formation of wedge-shaped defects. METHODS: Four hundred and ninety-three subjects were examined. The possible risk factors associated with wedge-shaped defects were identified by logistic regression analysis. RESULTS: The prevalence of wedge-shaped defects was observed 90.5% in this population. The prevalence and severity of wedge-shaped defects were found to be increasing with age. The correlation between age, sex, preferred side for tooth chewing, brushing twice a day, malocclusion, the formation and severity of wedge-shaped defects were noted. CONCLUSION: Occlusal factors and tooth brushing have found related to the formation of wedge-shaped defects.

Age Factors↗