An in vivo and in vitro evaluation of ASPA as a restorative material for cervical erosions and abrasions
Date
1979
DOI
Authors
Fayz, Farhad
Version
OA Version
Citation
Abstract
A clinical and in vitro study was conducted in order to evaluate the potential of a new cervical restorative material, ASPA.
In the clinical part of this approach 37 ASPA restorations were placed in cervical erosion defects of two patients. The patients were recalled after three and six months, and the fillings were photographed and assessed for anatomic form, marginal adaptation, color-match, marginal discoloration and surface integrity. One filling was lost between the first and second recall. The depth of this particular erosion was less than 1 mm. The marginal adaptation and discoloration were satisfactory. A slight deterioration in surface integrity was seen but was considered clinically insignificant. No change was observed in either the anatomical form, or the health of the gingival tissue. Even though an improvement was observed in the color-matching of ASPA, the material exhibited a lack of color compatibility with the tooth structures. The conservation of tooth substance (no cavity preparation is required), less time consumption and ease of placement compensate for this critical point.
In the in vitro portion of this study 40 extracted human teeth were prepared and filled with ASPA in cervical areas. They were thermal cycled and sectioned for detection of marginal leakage. None of the margins exhibited any vestige of dye penetration when placed on enamel, however, varying degrees of leakage were observed in those teeth which were finished on the C.E.J. or cementum. Scanning electron microscopy revealed a good adaptation and maintenance of margins placed on enamel while loss of filling material and poor adaptation were observed of those restorations which margins were placed on cementum or C.E.J.
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Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1979 (Operative Dentistry)
Bibliography: leaves 62-67.
Thesis (M.Sc.D.)--Boston University, Henry M. Goldman School of Graduate Dentistry, 1979 (Operative Dentistry)
Bibliography: leaves 62-67.
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This work is protected by copyright. Downloading is restricted to the BU community. If you are the author of this work and would like to make it publicly available, please contact open-help@bu.edu.