A 3‐year clinical study of tunnel restorations

Strand, Gunhild Vesterhus; Nordbø, H; Tveit, Anne Bjørg; Espelid, Ivar; K, Wikstrand; Eide, Geir Egil

doi:10.1111/j.1600-0722.1996.tb00096.x

Cited by 32 publications

(20 citation statements)

References 12 publications

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“…Recently, different cavity models were investigated by the use of Finite Element Analysis [57], and it was concluded that in class I and small class II MO cavities maximum stresses were generated along the toothrestoration interface basically due to this lack of wall deformation. These observations were also confirmed in vivo [11,40,43,54]. In addition to the C-factor, lack of wall elasticity seems to be a critical issue that should be addressed in further investigations.…”

Section: Discussionmentioning

confidence: 54%

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

2006

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The aim of this study was to evaluate the marginal adaptation of CEREC ceramic inlays, CEREC composite inlays and direct composite restorations in unbeveled proximal slot cavities under artificial aging conditions. Two groups of each restoration type were prepared (n=6), one group with a self-etch adhesive, the other group with H 3 PO 4 enamel etching before the self-etch adhesive application. Replicas were generated before and after long-term thermo-mechanical loading under dentinal fluid simulation and margins were evaluated at ×200 magnification in the scanning electron miscroscope (SEM). Statistically, significant differences were found before and after loading with respect to the percentages of "continuous margins", the direct composite filling with H 3 PO 4 enamel etching giving the lowest percentages of "continuous margins" after loading (p<0.05). The highest percentage of "continuous margin" was attained by composite inlays without H 3 PO 4 enamel etching. However, these results were not significantly different from ceramic inlays after stressing. Polymerization shrinkage is still one critical property of composite restorative materials. The marginal adaptation of indirect adhesive proximal slot restorations without enamel bevels both fabricated out of composite and ceramic is better than that of directly placed composite restorations.

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Section: Discussionmentioning

confidence: 54%

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

2006

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“…New techniques, like saucer-shaped and tunnel preparation, have been developed to allow minimal substance removal [Peters and McLean, 2001]. Unfortunately, tunnel preparations have been proven unsuccessful [Strand et al, 1996;Hasselrot, 1998;Pilebro et al, 1999;Nicolaisen et al, 2000;Strand et al, 2000].…”

mentioning

confidence: 99%

Changes in the Treatment Concept for Approximal Caries from 1983 to 2009 in Norway

2011

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The aim was to measure variations in threshold for operative treatment of approximal caries in permanent teeth and the use of restorative materials, compared with results from studies conducted in Norway in 1983 and 1995. In 2009, a precoded questionnaire was sent electronically to 3,654 dentists with E-mail addresses in the member register of the Norwegian Dental Association. The questions were related to caries, treatment strategies and choice of dental materials. Replies were obtained from 61% of the dentists after two reminders. Restorative treatment of approximal lesions confined to enamel, based on radiographic appearance, was proposed by 7% of the dentists, compared with 66% in 1983 and 18% in 1995. Younger dentists, significantly more often than older, would defer operative treatment of approximal lesions until the lesion was visible in dentine. While tunnel preparation most often was the preparation of choice in 1995 (47%), saucer-shaped preparation was most favoured in 2009 (69%). Tunnel preparation was only preferred by 4% of the dentists. Resin composite was the restorative material preferred by 95%, compared with 16% in 1995. The corresponding values for conventional glass ionomer cement (GIC) were 1 versus 22%, for resin-modified GIC 1 versus 7%, and for a combination of GIC and resin composite 2 versus 22%. Compomer was preferred by 1% of the respondents. The authors conclude that treatment concepts for approximal caries have changed considerably during the last 26 years. In 2009, only 7% of dentists reported that they would treat approximal caries operatively before the lesion reached dentine.

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“…This should theoretically not affect sensitivity while the false positive fraction might be increased. The prevalence in this study may reflect the situation in clinical studies where 'recurrent' caries has been observed in connection with 13-38% of the filled tunnels in permanent teeth [Svanberg, 1992;Nordbø et al, 1993;Lumely and Fisher, 1995;Strand et al, 1996]. These figures may include false positive and exclude false negative registrations, and the true fraction of teeth with caries may therefore be lower or higher.…”

Section: Caries Detection In Tunnel Restorationsmentioning

confidence: 84%

“…However, laboratory and clinical studies have revealed various problems in relation to the tunnel restoration. Primarily, the problems have been ascribed to the presence of residual dentinal caries, recurrence of the lesion and marginal ridge fracture [Strand and Tveit, 1993;Hasselrot, 1993;Strand et al, 1996].…”

mentioning

confidence: 99%

Accuracy of Radiographic Detection of Residual Caries in Connection with Tunnel Restorations

Wenzel¹,

Hintze²,

Hørsted‐Bindslev³

1997

Caries Res

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The aim of this study was to evaluate the diagnostic accuracy of radiographic examination for the detection of residual caries after tunnel preparation and filling with glass ionomer cement. Further, two different radiographic modalities were compared. Forty-five extracted human promolars and molars with clinical signs of approximal caries were selected for the study. The teeth were radiographed in order to identify surfaces with dentinal lesions suitable for tunnel preparation. Seventeen of the teeth had lesions that were as a minimum through the enamel and as a maximum into the outer half of the dentin (14 teeth = 1 lesion, 3 teeth = 2 lesions). Seventeen surgically removed third molars were thereafter included. These teeth were sound with respect to caries. The teeth were arranged in blocks with approximal contacts and radiographed using two image receptors: Ektaspeed Plus film (E) and the Digora (D) digital storage phosphor plate system. The 20 carious surfaces and 20 surfaces of the impacted teeth were prepared following the guidelines for the class II tunnel technique and filled with glass ionomer cement. The radiographic examination was repeated with both modalities after filling, and the approximal surfaces scored on the radiographs by 5 observers using the criteria: 0 = no filling, 1 = filling with residual caries, 2 = filling with no adjacent caries. All teeth except the unerupted third molars were sectioned, and the sections examined under the microscope. Residual caries was observed in 8 surfaces. On average, sensitivity was 0.25 for E and 0.32 for D, specificity 0.83 for E and 0.76 for D, positive predictive value 0.38 for E and 0.32 for D, and negative predictive value 0.75 for E and 0.77 for D. The differences between the two modalities were not statistically significant (p > 0.3). Based on the relatively small number of lesions in this study, it is suggested that radiography immediately after tunnel restoration cannot be recommended, as the diagnostic benefit from this examination seems to be minuscule.

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A 3‐year clinical study of tunnel restorations

Cited by 32 publications

References 12 publications

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

Proximal direct composite restorations and chairside CAD/CAM inlays: Marginal adaptation of a two-step self-etch adhesive with and without selective enamel conditioning

Changes in the Treatment Concept for Approximal Caries from 1983 to 2009 in Norway

Accuracy of Radiographic Detection of Residual Caries in Connection with Tunnel Restorations

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