A computerized system to measure interproximal alveolar bone levels in epidemiologic, radiographic investigations: I. Methodologic study

Wouters, Francis R.; Jon-And, C.; Frithiof, Lars; Söder, Per‐Östen; Lavstedt, Stig

doi:10.3109/00016358809004743

Cited by 26 publications

(12 citation statements)

References 16 publications

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“…These investigators using 2 times the standard deviation of differences between original and repeat measurements and their impression/electronically guided alignment device (I/EGAD), determined a threshold of change of 0.52 mm for CEJ-AC measurements 20. This value is similar to what these investigators had determined previously and is similar to what others (using method error and standard deviations of differences) determined for a threshold of change for CEJ-AC measurements 22, 34, 37-40…”

Section: Discussionsupporting

confidence: 83%

Alveolar bone measurement precision for phosphor-plate images

Hildebolt

Couture

Garcia

et al. 2009

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, an

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Objectives-To demonstrate methods for determining measurement precision and to determine the precision of alveolar-bone measurements made with a vacuum-coupled, positioning device and phosphor-plate images.Study design-Subjects were rigidly attached to the x-ray tube by means of a vacuum coupling device and custom, cross-arch, bite plates. Original and repeat radiographs (taken within minutes of each other) were obtained of the mandibular posterior teeth of 51 subjects, and cementoenameljunction-alveolar-crest (CEJ-AC) distances were measured on both sets of images. In addition, xray-transmission (radiodensity) and alveolar-crest-height differences were determined by subtracting one image from the other. Image subtractions and measurements were performed twice. Based on duplicate measurements, the root-mean-square standard deviation (precision) and least-significant change (LSC) were calculated. LSC is the magnitude of change in a measurement needed to indicate that a true biological change has occurred. Publisher's Disclaimer: This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final citable form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. NIH Public Access NIH-PA Author ManuscriptNIH-PA Author Manuscript NIH-PA Author ManuscriptResults-The LSCs were 4% for x-ray transmission, 0.49 mm for CEJ-AC distance, and 0.06 mm for crest-height 0.06 mm. Conclusion-TheLSCs for our CEJ-AC and x-ray transmission measurements are similar to what has been reported. The LSC for alveolar-crest height (determined with image subtraction) was less than 0.1 mm. Compared with findings from previous studies, this represents a highly precise measurement of alveolar crest height. The methods demonstrated for calculating LSC can be used by investigators to determine how large changes in radiographic measurements need to be before the changes can be considered (with 95% confidence) true biological changes and not noise (that is, equipment/observer error).In this study, measurement precision is considered to be the extent to which a numerical result can be reproduced when no biological change has taken place. 1 Measurement precision is determined by performing repeated measurements on the same subjects. The limitations of using regression analysis, correlation coefficients, and intra-class correlation coefficients for assessing repeated measurements have been described. 2, 3 Assessing precision is critical in clinical settings when diagnostic and therapeutic decisions are made--such as, when a clinician needs to know how large the difference between baseline and follow up bone-mineral-density measurements [determined with dual-energy, x-ray absorptiometry (DXA)] needs to be befor...

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Section: Discussionsupporting

confidence: 83%

Alveolar bone measurement precision for phosphor-plate images

Hildebolt

Couture

Garcia

et al. 2009

Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, an

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“…The study was thus designed in accordance with statistically accepted principles and the presentation of the results fulfills recommendations for the presentation of periodontal disease data in epidemiological research , Okamoto et al 1988). Furthermore, the computerized system (Wouters et al 1988a) which was utilized for measurement of the interproximal alveolar bone levels from radiographs has been thorougly tested and has been shown to be precise and reliable for cross-sectional epidemiologic investigations (Wouters 1988, Wouters et al 1988b).…”

Section: Discussionmentioning

confidence: 99%

“…The reference points were registered as coordinate pairs from x 5-magnified radiographs using the personal computer/digitizer system described by Wouters et al (1988a) and the computer application program EPIX (Wouters 1988). The recordings were performed by the same examiner (FRW) on each interproximal tooth surface unit of the permanent teeth, except the 3rd molars.…”

Section: Number Of Remaining Teeth (Table 2)mentioning

confidence: 99%

Marginal alveolar bone height in an adult Swedish population

Frithiof

Wouters

et al. 1991

J Clinic Periodontology

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The purpose of the present cross-sectional epidemiologic study was to assess the interproximal alveolar bone level within the dentition of 732 randomly selected adult individuals, stratified according to gender and age. Full mouth series of periapical radiographs were used for the assessments of the relation alveolar bone height/root length (B/R). A computer/digitizer recording method was utilized for the assessments. The results were presented as (i) mean values per age group and gender, (ii) mean frequency of subjects with sites exceeding certain thresholds of bone loss and (iii) cumulative frequencies of subjects with various number and percentual proportion of sites in relation to different B/R-ratio intervals. The results showed a reduction in mean alveolar bone/root ratio with age. The women had a significantly more favourable mean B/R-ratio than men in the ages above 40 years; the women had, however, more missing sites above age 60 years. By older age, there was observed an increased variation between individual mean B/R-ratios. Only a few subjects had a mean B/R-ratio less than or equal to 50%. A subfraction of the subjects in the different age groups had greater than 20% of their sites below a B/R-ratio of 60%. This fraction increased with age.

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“…Radiographs were taken and, using a computerized measuring system, bone height was determined as a percentage of the root length (BH%) from radiographs magnified Â5 (22,23).…”

Section: Periodontal Examinationðselection Of Sites and Samplingmentioning

confidence: 99%

Neutrophil elastase activity, levels of prostaglandin E₂, and matrix metalloproteinase-8 in refractory periodontitis sites in smokers and non-smokers

Söder

1999

Acta Odontologica Scandinavica

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The study was aimed to determine elastase activity, levels of prostaglandin E2 (PGE2), and matrix metalloproteinase-8 (MMP-8) in gingival crevicular fluid (GCF) in 20 smokers and 20 non-smokers, mean age 47.4 (+/-2.9 SD) years with refractory periodontal diseases. GCF was collected with intracrevicular washing from four sites in each subject. Clinical assessments, included gingival index, probing depth, clinical attachment level, bleeding on probing, bone height, and plaque accumulation. Smokers had a significantly higher percentage of the gingival margin covered by plaque (P%Im), higher number of sites with probing pocket depth > or = 5 mm, higher mean values of probing pocket depth and probing attachment level (P< 0.01). Smokers had significantly higher mean levels of neutrophil elastase activity (P< 0.01) in the supernatants than non-smokers did. In sites with matching pocket depths, neutrophil elastase activity was significantly higher in smokers (P< 0.001) than in non-smokers. In sites with high levels of MMP-8 the PGE2 levels were significantly (P< 0.001) higher compared to sites with low levels in smokers as well as in non-smokers. A significant correlation was found between probing pocket depth and levels of MMP-8 (P< 0.001) and in non-smokers between probing pocket depth and levels of PGE2 (P< 0.05).

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A computerized system to measure interproximal alveolar bone levels in epidemiologic, radiographic investigations: I. Methodologic study

Cited by 26 publications

References 16 publications

Alveolar bone measurement precision for phosphor-plate images

Alveolar bone measurement precision for phosphor-plate images

Marginal alveolar bone height in an adult Swedish population

Neutrophil elastase activity, levels of prostaglandin E₂, and matrix metalloproteinase-8 in refractory periodontitis sites in smokers and non-smokers

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A computerized system to measure interproximal alveolar bone levels in epidemiologic, radiographic investigations: I. Methodologic study

Cited by 26 publications

References 16 publications

Alveolar bone measurement precision for phosphor-plate images

Alveolar bone measurement precision for phosphor-plate images

Marginal alveolar bone height in an adult Swedish population

Neutrophil elastase activity, levels of prostaglandin E2, and matrix metalloproteinase-8 in refractory periodontitis sites in smokers and non-smokers

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Neutrophil elastase activity, levels of prostaglandin E₂, and matrix metalloproteinase-8 in refractory periodontitis sites in smokers and non-smokers