Marginal adaptation

Abstract

A critical review of studies assessing the marginal adaptation of direct placement, plastic restorations is presented. The effects upon adaptation of cavity design and location of cavity margins are examined, together with the effects of differing placement and finishing techniques. Both the choice of restorative material and the use of liners/bases are shown to influence the quality of restoration margins. Techniques used in both in vivo and in vitro assessment are reviewed, however it appears that a wide variety of methodologies exist and the establishment of standard, published criteria for the qualitative assessment of marginal adaptation is recommended.

The Effect of Polishing Techniques and Time on the Surface Characteristics and Sealing Ability of Resin Composite Restorations After One-year Storage

“…15,38 The thermal insults produced by rotational instruments during finishing and polishing procedures can somewhat affect marginal sealing of the restorations. 27,39 The results of the current study show that, after one year, there were no differences among the groups. A reasonable explanation is that the storage period compromised adhesion between the composite and cavity walls, possibly due to adhesive degradation.…”

Non-destructive 3D imaging of composite restorations using optical coherence tomography: Marginal adaptation of self-etch adhesives

“…The most common method for leakage observation of restorative material-tooth is by immersing the bonded samples into a dye solution (organic or silver), followed by multiple slices sections and observation of the depth of dye penetration along the interface using light microscopy, scanning electron microscopy (SEM) or transmission electron microscopy (TEM). 10,11 Creating several slices can provide a more accurate data of leakage formation in the whole cavity; however, the conventional leakage evaluation techniques are clinically unfeasible. Moreover, it is evidenced that leakage is seldom uniformly distributed, and that it is highly dependent on the C-factor as well as the composite volume.…”

“…[12][13][14] Clinical assessments of margin quality are routinely carried out by dentists; however, the replacement of existing restorations and the treatment planning decisions are very subjective. 10 Radiographic assessment is frequently used in the clinic, though a translucent zone on a radiograph can be associated with either the presence of a thick adhesive layer, secondary caries or a gap. 15 Furthermore, radiation hazard of the X-ray to both the patient and the clinician remains an issue.…”

Assessment of current adhesives in class I cavity: Nondestructive imaging using optical coherence tomography and microtensile bond strength

“…Marginal adaptation tests often require multiple sectioning of the samples, followed by immersion into a staining solution, and surface polishing before observation using light microscopy, or scanning electron microscopy (SEM), or ultrathin sectioning for observation using transmission electron microscopy (TEM) [6][7][8]. These procedures are time-consuming and are limited to in vitro studies.…”