A Clinical Study on 7 Premolars treated with Endodontic Therapy due to Central Cusp Fracture

DOI 5 Citations 35 References
  • Yaezawa Takako
    Department of Pedodontics, School of Dentistry, Niigata University
  • Haishima Keiko
    Department of Pedodontics, School of Dentistry, Niigata University
  • Tomizawa Mieko
    Department of Pedodontics, School of Dentistry, Niigata University
  • Noda Tadashi
    Department of Pedodontics, School of Dentistry, Niigata University

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  • 中心結節の破折により歯内療法を施した小臼歯7歯の臨床的観察

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Seven immature premolars were treated with endodontic therapy due to central cusp fracture at the Pedodontic Clinic of Niigata University Dental Hospital during a period of 14 years and 9 months from September 1979 to June 1994. We investigated these cases clinically and radiologically.<BR>The results were as follows:<BR>1. The observation period ranged from 8 months to 7 years and 5 months.<BR>2. The ages of the patients at the first examination ranged from 9 years and 2months to 12 years and 7 months.<BR>3. Five cases were affected on the lower second premolars, one involving the upper second premolar and the other the lower first premolar. The state of root formation at the first examination ranged from 2/3 to 3/4 of root length.<BR>4. Treatment included vital pulp amputation with Calvital in one tooth, and root canal filling with Vitapex after pulpectomy or infected root canal therapy on each of the three teeth.<BR>5. Based on X-ray examination, in the case of vital pulp amputation, hard tissue formation at the amputation site was observed after about 3 weeks, then growth of the root with apexogenesis was recognized. In the cases of pulpectomy, two of the three teeth showed root extension after apical closure by the hard tissue. However in the cases of infected root canal therapy, only apexification was observed except for the growth of the root. Also the dose of hard tissue added to the root apex depended on each individual case.<BR>6. It is suggested that apical closure or growth of the root could be accomplished by early detection and adequate treatment for the central cusp fracture of premolars.

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