In vivo and in vitro evaluation of marginal fit of class II ceromer inlays

Abstract

The aim of this study was to evaluate the marginal adaptation of class II ceromer (Targis, Vivadent) indirect inlay restorations under both in vivo and in vitro conditions. Twenty Targis inlays were produced for class II inlay cavities (13 mandibular and seven maxillary teeth) in 20 patients. The in vivo adaptation of the inlay to the tooth cavity was evaluated by means of silicone replica technique. For in vitro evaluation, 20 mesio-occluso-distal (MOD) Targis inlays were made in extracted upper molars. Half of the inlays were cemented with Variolink high-viscosity resin cement while the other half was cemented with Variolink Ultra. The replica specimens and in vitro samples were sectioned buccolingually and mesiodistally, and marginal adaptation was evaluated at both proximal and occlusal margins at 200x magnification under a light microscope. The data was analyzed with anova (P < 0.05). The in vivo mean film thickness values for occlusal and proximal locations were recorded as 73 and 132 microm respectively. In vitro mean marginal fit values were observed as 48 and 67 microm for occlusal and proximal margins of inlays luted with Variolink II high viscosity. The marginal fit values recorded under in vivo conditions were higher in magnitude than the measurements obtained under in vitro conditions. The use of a highly filled resin luting agent with an ultrasonic insertion technique did not cause an increase in marginal gap width of the inlay.

Clinical Marginal and Internal Adaptation of Maxillary Anterior Single All‐Ceramic Crowns and 2‐year Randomized Controlled Clinical Trial

“…Silicone replicas were sectioned at the mid‐point for both buccolingual and mesiodistal directions to standardize the measurement points. Marginal and internal gap measurement results from clinical studies are generally higher than those of in vitro studies due to several patient factors . It is not possible to standardize some factors such as clinical crown length, axial angle, and location of the shoulder.…”

“…These conditions include multiple intermittent cyclic forces during chewing, grinding, and clenching, constant exposure to a moist, bacteria‐rich environment, consumption of too hot or too cold liquids and acids, and traumatic or inadequate tooth brushing. In addition, specimens used for testing dental ceramics in the laboratory sometimes differ significantly in both size and structure from the restorations they represent . Therefore, in vivo evaluation has been the basis for establishing criteria for clinically successful and acceptable crowns …”

Evaluation of internal adaptation in ceramic and composite resin inlays by silicon replica technique

“…It is generally accepted that marginal integrity is an important factor for the long‐term success of inlays. The long‐term clinical performance of inlays depends on a number of factors of which marginal adaptation is of significant interest (14). However, it is necessary to achieve good, overall three‐dimensional fit for the restoration to receive maximum mechanical support from the underlying tooth, especially for occlusally loaded posterior teeth (11).…”

Evaluation of adaptation of ceramic inlays using optical coherence tomography and replica technique

“…36 However, the replica technique indirectly represents the cement film thickness 14 and had some limitations and inherent errors, such as identification of restoration margins and finishing lines. 20,21 In addition, the defects on the replica or in the cutting process could affect evaluation of the film thickness. 22,23 Higher adaptation values of ceramic inlays measured using the replica technique in our study could have arisen due to the aforementioned factors related to the indirect evaluation.…”