Apical limit of root canal instrumentation and obturation, part 2. A histological study.

The results of an in vivo histological study involving apical and periapical tissues following root canal therapy after different observation periods demonstrated the most favourable histological conditions when the instrumentation and obturation remained at or short of the apical constriction. This was the case in the presence of vital or necrotic pulps, also when bacteria had penetrated the foramen and were present in the periapical tissues. When the sealer and/or the gutta-percha was extruded into the periapical tissue, the lateral canals and the apical ramifications, there was always a severe inflammatory reaction including a foreign body reaction despite a clinical absence of pain.

[1]  K. Langeland,et al.  Antibody Formation in Primates Following Introduction of Antigens into the Root Canal , 1966, Journal of dental research.

[2]  E. Rossomando,et al.  Tumor necrosis factor identified in periapical tissue exudates of teeth with apical periodontitis. , 1991, Journal of endodontics.

[3]  K Langeland,et al.  Work-saving devices in endodontics: efficacy of sonic and ultrasonic techniques. , 1985, Journal of endodontics.

[4]  T. Turek,et al.  A light microscopic study of the efficacy of the telescopic and the Giromatic preparation of root canals. , 1982, Journal of endodontics.

[5]  L. Spångberg,et al.  Biologic effects of dental materials. 3. Toxicity and antimicrobial effect of endodontic antiseptics in vitro. , 1973, Oral surgery, oral medicine, and oral pathology.

[6]  J H Gutierrez,et al.  Apical foraminal openings in human teeth. Number and location. , 1995, Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics.

[7]  A. Slee,et al.  Predominant microflora associated with human dental periapical abscesses , 1982, Journal of clinical microbiology.

[8]  D. Anderson,et al.  Diagnostic Criteria for the Treatment of Caries-Induced Pulpitis. , 1981 .

[9]  E. Saunders,et al.  Coronal leakage as a cause of failure in root-canal therapy: a review. , 1994, Endodontics & dental traumatology.

[10]  K. Safavi,et al.  Effect of calcium hydroxide on bacterial lipopolysaccharide. , 1993, Journal of endodontics.

[11]  K. Langeland.  Tissue response to dental caries. , 1987, Endodontics & dental traumatology.

[12]  Buchanan Ls.  Management of the curved root canal. , 1989 .

[13]  H. Nyborg,et al.  Healing processes after vital extirpation. An experimental study of 17 teeth. , 1965, Odontologisk tidskrift.

[14]  K. Langeland.  Tissue changes in the dental pulp : an experimental histologic study , 1957 .

[15]  S. Seltzer,et al.  Biologic aspects of endodontics. IV. Periapical tissue reactions to root-filled teeth whose canals had been instrumented short of their apices. , 1969, Oral surgery, oral medicine, and oral pathology.

[16]  S. Seltzer,et al.  Biologic aspects of endodontics , 1968 .

[17]  K. Safavi,et al.  Tissue reaction to endodontic materials: methods, criteria, assessment, and observations. , 1991, Oral surgery, oral medicine, and oral pathology.

[18]  K. Langeland,et al.  Development of predictable periapical lesion monitored by subtraction radiography. , 1987, Endodontics & dental traumatology.

[19]  L. Spångberg,et al.  Biologic effects of dental materials. 2. Toxicity of anterior tooth restorative materials on HeLa cells in vitro. , 1973, Oral surgery, oral medicine, and oral pathology.

[20]  J. Blayney.  Present Conception of Vital Reactions Which Occur Within Apical Tissues after Pulp Removal , 1929 .

[21]  T. Mullaney,et al.  Prevalence of teaching apical patency and various instrumentation and obturation techniques in United States dental schools. , 1997, Journal of endodontics.

[22]  S. Robbins,et al.  Pathologic basis of disease , 1974 .

[23]  K. Langeland,et al.  Pulp biopsies from the teeth associated with periapical radiolucency. , 1984, Journal of endodontics.

[24]  K. Langeland.  The histopathologic basis in endodontic treatment. , 1967, Dental clinics of North America.

[25]  Stephen Cohen,et al.  Pathways of the Pulp , 1976 .

[26]  E. Hatton,et al.  Histologic Findings in Teeth with Treated and Filled Root Canals , 1928 .

[27]  A. Möller.  Microbiological examination of root canals and periapical tissues of human teeth. Methodological studies. , 1966, Odontologisk tidskrift.