Abstract
Secondary caries is the most common cause of dental restoration failures. This study aimed to compare the diagnostic accuracy of conventional and digital intraoral radiography and cone beam computed tomography (CBCT) for detection of recurrent caries around composite restorations. mesio-occluso-distal (MOD) cavities were prepared using bur on 45 extracted sound human molar teeth. The teeth were divided into 3 groups. In the control group, cavities were restored with composite resin after etching and bonding (n=15). In Group 2, 500-μm thick wax was placed over the buccal, lingual and gingival walls and the cavities were restored with composite resin. Group 3 specimens were subjected to pH cycling and artificial caries were created on the buccal, lingual and gingival walls. The cavities were restored with composite. Conventional and digital photo-stimulable phosphor (PSP; Optime) radiographs and two CBCTs images (NewTom 3G and Cranex 3D) were obtained from them. Presence or absence of caries in the cavity walls was assessed on these images. Data were analyzed using Kappa statistic. The diagnostic accuracy of CBCT was significantly higher than that of digital and conventional intraoral radiography (p<0.05). The accuracy was 0.83, 0.78, 0.55 and 0.49 for CBCT Cranex 3D, CBCT NewTom 3G, conventional and digital intraoral radiography, respectively. CBCT has a higher diagnostic accuracy than digital and conventional intraoral radiography for detection of secondary caries around composite restorations.
Highlights
Despite the advances in composite restorative materials and dentin bonding systems, secondary caries is still a main cause for failure of resin restorations [1,2]
Secondary caries are defined as carious lesions developed at the margins of existing restorations [3,4]
No significant difference was found in the diagnostic accuracy of cone beam computed tomography (CBCT) Cranex and CBCT NewTom for the assessment and detection
Summary
Despite the advances in composite restorative materials and dentin bonding systems, secondary caries is still a main cause for failure of resin restorations [1,2]. Secondary caries are defined as carious lesions developed at the margins of existing restorations [3,4]. These carious lesions are formed as extrinsic lesions. Resin restorations of the posterior teeth must be radiopaque because detection of marginal defects, overhangs and secondary caries around these restorations highly depends on the radiopacity of these restorations [6]. Diagnosis of secondary caries at the interproximal surfaces is extremely difficult unless the carious lesion is large enough or has resulted in loss of tooth structure [7,8,9]. Considering the high prevalence of secondary caries and the importance of preserving tooth vitality, early detection of these lesions is of utmost importance to prevent further extension
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