A Computer‐Aided Image Analysis System for Area Measurement of Tooth Root Surfaces

Verdonschot, E.H.A.M.; Sanders, Adam; Plasschaert, and A.J.

doi:10.1902/jop.1990.61.5.275

Cited by 18 publications

(5 citation statements)

References 6 publications

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“…Such a study should include the parameters evaluated in the present study: thorough clinical registration of all lesions, salivary values and occlusal excursions. The micromorphology of the lesions may be simply and accurately recorded by replication and SEM; the feasibility of quantitative monitoring of lesion progression by computerized image analysis (Verdonschot, Sanders & Plaaschaert, 1990) or profilometry (Sorvari & Kiviranta (1988) of the replicas is under investigation. Video-microendoscopy gives a new dimension to optical recording of the oral tissues at magnifications corresponding to low magnification SEM.…”

Section: Discussionmentioning

confidence: 99%

Idiopathic cervical lesions: in vivo investigation by oral microendoscopy and scanning electron microscopy. A pilot study

Bevenius

L'Estrange

Karlsson

et al. 1993

J of Oral Rehabilitation

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The development and progression of cervical lesions have not been thoroughly documented. Clinically, two morphologically distinct forms, saucer-or wedge-shaped, have been described. In this study, the micromorphology of manifest cervical lesions was documented in six subjects, by SEM replication and microendoscopy. Optoelectronic recordings were made of extreme mandibular lateral excursions. Salivary parameters were evaluated and a detailed case history, including oral hygiene and dietary habits, was taken. Lesions of varying severity could be observed in the same subject. Longitudinal fractures of the enamel were common. The dietary analyses were uneventful and salivary values were normal. No correlation was found between brushing habits and the location and severity of the lesions. The optoelectronic recordings, however, indicated a possible correlation between irregular lateral excursion and the severity and location of the lesions, with a tendency for fewer and less severe lesions on the preferred chewing side. The results have indicated some areas of interest for future studies applying non-invasive observation methods.

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Section: Discussionmentioning

confidence: 99%

Idiopathic cervical lesions: in vivo investigation by oral microendoscopy and scanning electron microscopy. A pilot study

Bevenius

L'Estrange

Karlsson

et al. 1993

J of Oral Rehabilitation

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“…Previous studies investigating scaling and root planing have utilised dyes such as toluidine blue (Waerhaug 1975, Stambaugh et al 1981, Reinhardt et al 1985), malachite green (Schwarz et al 1993), methylene blue (Rabbani et al 1981, Eschler & Rapley 1991, Wylam et al 1993, Anderson et al 1996) and gentian violet (Poole et al 1984, Eaton et al 1985). In addition, a number of studies have used erythrosine to indicate the thoroughness of root surface debridement (Thornton & Garnick 1982, Eakle et al 1986, Walmsley et al 1988, Nosal et al 1988, Verdonschot et al 1990, Boyd et al 1992, Braun & Ciancio 1992). However, none of these studies have gone beyond macroscopic observations to analyse the nature of the stained material.…”

Section: Discussionmentioning

confidence: 99%

Subgingival debridement of root surfaces with a micro‐brush: macroscopic and ultrastructural assessment

Carey

Daly

2001

J Clinic Periodontology

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“…The contrast in brightness between the tooth surface and the dark dentifrice allowed for a clear demarcation of the dentifrice area. Using the metric reference on the slide, the area o f one pixel was measured and multiplied by the number of pixels of the dentifrice area, according to the method described by Verdonschot et al [1990].…”

Section: Methodsmentioning

confidence: 99%

Electrical Conductance and Electrode Area on Sound Smooth Enamel in Extracted Teeth

Huysmans¹,

Verdonschot²,

Rondel³

1995

Caries Res

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Electrical conductance measurements are being used experimentally to diagnose caries. Current equipment, e.g. the electronic caries monitor (ECM), uses a probe to scan occlusal fissures. For full-mouth examination this method is rather time-consuming. A method with which only one measurement is needed for an entire (occlusal) surface would be preferable. However, the enlargement of the area being measured will influence the conductance. It was the purpose of this study to investigate the relationship between the electrical conductance of human teeth and the enamel electrode area, and to compare the range of results of surface measurements with those of the scanning method. Twenty-five sound extracted teeth were selected for the study. The reference electrode of the ECM was connected to the roots. The buccal surface was blotted dry, and a coloured dentifrice was syringed in increments onto the surface. After each increment the surface was photographed together with a metric reference, a conductance measurement was performed by holding the ECM probe tip in the dentifrice, and the ECM reading was recorded. For each tooth between 5 and 10 increments were applied and measured. The photographs were digitised and the electrode areas were calculated. A least squares curve fitting procedure yielded a linear relationship between conductance and electrode area (0.88 ≤ R² ≤ 1.0, mean R² = 0.97). For most teeth the threshold for dentinal caries as used for scanning ECM measurements (ECM reading = 6.00) was reached only when the electrode area exceeded 12 mm2. For 6 teeth this conductance was already reached between 5 and 12 mm². Electrical conductance measurements of the occlusal surfaces of 18 teeth, with electrode areas as projected two-dimensionally of between 5 and 10 mm², showed only 3 measurements above the threshold. None of those 3 came from the group of 6 teeth mentioned before. It was concluded that the relationship between electrical conductance of teeth and electrode area is linear. It was also concluded that when electrical conductance measurements of occlusal surfaces are to be made, the threshold for dentinal caries will probably have to be shifted to a higher conductance level to limit false-positive results.

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A Computer‐Aided Image Analysis System for Area Measurement of Tooth Root Surfaces

Cited by 18 publications

References 6 publications

Idiopathic cervical lesions: in vivo investigation by oral microendoscopy and scanning electron microscopy. A pilot study

Idiopathic cervical lesions: in vivo investigation by oral microendoscopy and scanning electron microscopy. A pilot study

Subgingival debridement of root surfaces with a micro‐brush: macroscopic and ultrastructural assessment

Electrical Conductance and Electrode Area on Sound Smooth Enamel in Extracted Teeth

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