Extraoral control of geometry for digital subtraction radiography

Reddy, Michael S.; Webber, Richard L.; Williams, Rhodri; Ruttimann, Urs E.

doi:10.1111/j.1600-0765.1987.tb01605.x

Cited by 173 publications

(73 citation statements)

References 14 publications

(10 reference statements)

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“…Ideally, this will allow assessment in terms of quality and amount of bone, location of anatomical structures, and longitudinal morphological change through bone loss along the implant surface. Digital subtraction radiography was introduced into the field of periodontal research in the 1980s as one of the most versatile approaches to assessment of longitudinal bone change 8,10,11,28) . Jeffcoat et al 12) used a reference wedge calibrated to different thicknesses, which was incorporated into the periapical radiograph.…”

Section: Discussionmentioning

confidence: 99%

“…In other words, the implant fixture itself acts as its own ruler to compensate for linear measurement of bone loss. Although digital subtraction technique 8,11,12,27,28) with PE radiographs has recently become widely used for bone loss assessment, and most dentists in private clinics routinely use PE radiographs for implant site assessment, no studies have reported the accuracy of linear measurement of implant length based on PE radiographs compared with that on other radiographs.…”

Section: Introductionmentioning

confidence: 99%

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Reliability of Linear Distance Measurement for Dental Implant Length with Standardized Periapical Radiographs

Wakoh

Harada

Otonari

et al. 2006

Bull. Tokyo Dent. Coll.

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The purpose of this study was to investigate the accuracy of distance measurements of implant length based on periapical radiographs compared with that of other modalities. We carried out an experimental trial to compare precision in distance measurement. Dental implant fixtures were buried in the canine and first molar regions. These were then subjected to periapical (PE) radiography, panoramic (PA) radiography, conventional (CV) and medical computed (CT) tomography. The length of the implant fixture on each film was measured by nine observers and degree of precision was statistically analyzed. The precision of both PE radiographs and CT tomograms was closest at the highest level. Standardized PE radiography, in particular, was superior to CT tomography in the first molar region. This suggests that standardized PE radiographs should be utilized as a reliable modality for longitudinal and linear distance measurement, depending on implant length at local implantation site.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reliability of Linear Distance Measurement for Dental Implant Length with Standardized Periapical Radiographs

Wakoh

Harada

Otonari

et al. 2006

Bull. Tokyo Dent. Coll.

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“…Techniques have recently been developed for determining the degree of angulation error that occurs with each radiograph in a longitudinal series . Methods have also been developed for using cephalostats to control projection geometry (Jeffcoat et al, 1987). In sum, various methods have been developed for controlling projection geometry.…”

Section: Control Of Exposure Geometrymentioning

confidence: 99%

Image-based quantification of alveolar bone

Hildebolt

Bartlett

Shrout

et al. 1994

Am. J. Phys. Anthropol.

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Diminished alveolar bone support is the principal cause of tooth loss. This bone loss is most commonly attributed to periodontal disease. The causes of periodontal disease are not fully understood although bacteria in dental plaque are known to be major contributors. Moreover, it is thought that the incidence and prevalence of alveolar bone loss vary among human populations, hence identification of high-risk groups is essential to epidemiological studies aimed at establishing hypotheses about the etiology of alveolar bone loss. Data drawn from population surveys can then be used to test these hypotheses. Both epidemiological studies and laboratory and clinical testing have been hampered because of the lack of accurate methods for alveolar bone quantification. Recently, several noninvasive, image-based techniques, with accuracy sufficient for testing hypotheses concerning alveolar bone, have become available. The most commonly used of these methods are x-rays and dental radiographic films. We review the current methods for quantitative dental radiography, concentrating on digital techniques used in alveolar bone assessment. Although there is considerable potential to improve the imaging and quantifying of alveolar bone, current digital radiographic methods are practical for use by physical anthropologists and can provide information on bone mass variations among populations. Such information can be used to suggest and evaluate potential etiologic agents of alveolar bone loss. Moreover, these methods can be adapted to the quantitative measurement of image features (other than alveolar bone) that are of interest in anthropologic studies. The maintenance of a well-rounded, smooth alveolar crest with a n intact cortex results from an equilibrium between the formation and resorption of bone. When bone loss occurs, there is an absolute or relative increase in resorptive activity. This activity results in alterations in the alveolar bone. Cortical bone loss occurs through a n increase in cortical porosity and thinning while it appears that trabecular bone loss occurs through a decrease in the areaholume of the bone trabeculae (von Wowern, 1985(von Wowern, , 1986. Because of the lack of validated quantitative methods, the causes of alveolar bone loss have yet to be clearly identified although the presence and activity of bacteria in dental plaque are thought to be major contributors (Broadening the scope: Long-range research plan for the nineties: Na-

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“…[12][13][14][15][16][17] The various reports all can be applied to study radiographic changes at the implantation site as a function of time post-treatment, but do not allow for comparison of radiographic and clinical data as no application is available for such comparative studies. The main improvement of the method introduced in this study is that it makes such comparative studies possible.…”

Section: Measuring Errors (Mm Mean ± ± Sd) As Calculated For Each Sementioning

confidence: 99%

A Technique for Standardized Evaluation of Soft and Hard Peri‐Implant Tissues in Partially Edentulous Patients

Meijndert

Meijer

Raghoebar

et al. 2004

Journal of Periodontology

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Background: There is a growing need to evaluate the esthetics of implant‐supported crowns and bridges. An important tool for such an evaluation is standardized assessment of the soft and hard peri‐implant tissue levels.Methods: A simple acrylic device has been developed for reliable and reproducible assessment of soft and hard periimplant tissues using standardized color slides and standardized dental x‐rays. With this device, changes in both the soft and hard tissues around implant‐supported crowns can be evaluated as a function of time. The reproducibility of the technique was tested on color slides as well as on dental x‐rays in a series of implant‐supported crowns and their neighboring teeth. Results: The reproducibility of this technique was excellent. The measuring errors for repeated measurements of the soft and hard tissues were 0.14 ± 0.02 mm and 0.13 ± 0.01 mm, respectively.Conclusions: The device is a reliable tool to assess changes in both soft and hard tissues around crowns and implants over time. Likewise, it is suggested that this technique also can be used to objectively assess soft and hard tissue changes around natural teeth with or without prosthetic restorations. J Periodontol 2004;75:646‐651.

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Extraoral control of geometry for digital subtraction radiography

Cited by 173 publications

References 14 publications

Reliability of Linear Distance Measurement for Dental Implant Length with Standardized Periapical Radiographs

Reliability of Linear Distance Measurement for Dental Implant Length with Standardized Periapical Radiographs

Image-based quantification of alveolar bone

A Technique for Standardized Evaluation of Soft and Hard Peri‐Implant Tissues in Partially Edentulous Patients

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