Periodontal Bony Defects on the Dry Skull

Saari, James T.; Hurt, William C.; Biggs, Norman

doi:10.1902/jop.1968.39.5.278

Cited by 43 publications

(22 citation statements)

References 5 publications

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“…It was twice as common per segment in the mandible as in the maxilla, and there was a higher prevalence of these defects in posterior segments than in anterior segments. This accords with the findings in dry skulls by Saari et al (1968). Apart from furcation involvement, which represents a stage in the progress of tissue destruction rather than a form of bone lesion, the interdental crater is the predominant lesion of the lower posterior segment.…”

Section: Bone Morphology and Bone Loss In Periodontal Disease 15supporting

confidence: 90%

“…The prevalence and location of the different forms of bone defect may give some clue as to their pathogenesis, and a number of studies of bone defects have been carried out on dry skull material (Stahl et al 1963, Saari et al 1968, Larato 1970, 1972; few studies have been carried out on the live patient during surgical intervention (Prichard 1965).…”

Section: Bone Morphology and Bone Loss In Periodontal Disease 15mentioning

confidence: 99%

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Bone morphology and bone loss in periodontal disease

Manson

1976

J Clinic Periodontology

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A clinical study of the distribution of different types of bone defects in chronic periodontitis was carried out on 30 patients. An analysis of 176 defects suggests that their distribution reflects the original morphology of the alveolar bone. The role of function as a determinant of that morphology is examined. While there appears to be a relationship between functional stress and the phylogenesis of the bone, there is no direct relationship between function and ontogenesis. A study of growth remodelling of the mandible in several animals indicates that the pattern of activity is dictated by a drive to achieve a mature form which is the expression of the genetic endowment. Normal function and normal muscle stress are part of the environment in which complete growth can take place, but they do not appear to play a more active role in determining the form of growth; abnormal function does not allow normal growth to take place. The relationship between functional stress and the morphology and activity of the mature bone is not clear. Osteoporosis of age, as measured by the metacarpal index in 101 patients with chronic periodontitis, did not appear to be significantly related to the bone loss score. However, in 54 females patients, aged 35-45 years, a significant correlation was found between the metacarpal index and a "rapidity of bone loss" score.

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Section: Bone Morphology and Bone Loss In Periodontal Disease 15supporting

confidence: 90%

Section: Bone Morphology and Bone Loss In Periodontal Disease 15mentioning

confidence: 99%

Bone morphology and bone loss in periodontal disease

Manson

1976

J Clinic Periodontology

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“…This frequency is similar to those reported in other surveys (Larato, 1970;Nielsen et al, 1980;Saari et al, 1968) although higher frequencies have been reported for patients at the time of surgerv (Manson and Nicholson. 1974) and for En; skeletal population from India (Rees et al, 1971).…”

Section: Skeletal Materialssupporting

confidence: 91%

ROC analysis of observer‐response subjective rating data—application to periodontal radiograph assessment

Hildebolt

Vannier

Shrout

et al. 1991

American J Phys Anthropol

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Many physical anthropological studies require that an observer or device discriminate between states that can be easily confused. Receiver operating characteristic (ROC) analysis currently offers the best method for determining the accuracy of such choices, particularly for small sample sizes. Although ROC analysis is widely accepted in psychophysical and biomedical testing, its use in anthropological studies has not been reported. ROC analysis is used here to determine the usefulness of enhanced dental radiographs to assess vertical alveolar bone defects for quantitative studies of human variation with regard to periodontal disease. The presence or absence of vertical-bony defects (truth) for 75 human skulls was established by the consensus of two trained observers. Dental bitewing-radiographs were taken of the alveolar processes, the radiographs digitized, and the brightness and contrast of the digital images enhanced. The two observers who established truth then rated 1) plain bitewing radiographs, 2) unenhanced digital images of bitewings, and 3) enhanced digital images of bitewings for vertical bony defects. The rating scale varied from 1 (vertical defect definitely or almost definitely present) to 5 (definitely or almost definitely absent). ROC analysis was used to compared the diagnostic value of the 3 imaging modalities. All modalities had nearly identical diagnostic performance, measured as Az values (areas beneath ROC curves) that were less than 0.80, which indicates only moderate usefulness. It is concluded that enhancement does not increase success in vertical-bony-defect diagnosis from digital dental radiographs processed in this manner. Moreover, it is suggested that conventional bitewing radiographs may be unsuitable for accurate quantification of such defects.

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“…Thus, there are more craters between first and second molars than between first molars and second premolars. 20 The relatively good access for oral hygiene to the distal furcation of the second molar (when the third molar is removed) makes root amputation somewhat less necessary than in the first molar. Further more, it seems that there is a relatively higher proportion of fused roots among second molars than first, which would contraindicate root amputation.…”

Section: Discussionmentioning

confidence: 99%