Abstract
Composite resin full crowns which use composite resin and crown forms, had been used for restoration or 87 primary anterior teeth of 2 to 9 years old children, were observed clinically and microscopically and evaluated. Postoperative observation periods were from 30 to 1480 days, and averaged 496 days. Clinical observation was conducted by means of an explorer, X-ray and colour photography.
The following clinical findings were obtained.
1. Dislodgement of crowns 5 cases (5.7%)
2. Breakage of crowns 8 cases (9.2%)
3. Aburration of crowns 15 cases (17.2%)
4. Discolouration of crowns 5 cases (6.9%)
5. Gingivitis 2 cases (2.3%)Marginal adaptation of the composite resin full crowns was observed clinically in 6 cases of exfoliated teeth, and 3 cases were evaluated as good,1 case as fair and 2 cases as poor.
Marginal adaptation of the crowns was also observed through the scanning electron microscope and revealed that the adaptation was not always good. As a result of this experiment the following conclusions were obtained.
A composite resin full crown has maximal esthetics, easy to fablicate in minimal chair time, and also has better clinical results than that of the conventional resin jacket crown.
It is considered that a composite resin full crown results in suitable restoration for primary anterior teeth.
