1. Root canal obturation;Ingle;J Am Dent Assoc,1956
2. Dependence of the results of pulp therapy on certain factors: an analytic study based on radiographic and clinical follow-up examination;Strindberg;Acta Odontol Scand,1956
3. Prognosis of pulp and root canal therapy. A clinical and roentgenographic follow-up examination;Grahnen;Odontol Revy,1961
4. Factors affecting successful repair after root canal therapy;Seltzer;J Am Dent Assoc,1963
5. Evaluation of the success of endodontically treated teeth;Heling;Oral Surg,1970