The influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth

Young-Gyun Lee; Hye-Jin Shin; Se-Hee Park; Kyung-Mo Cho; Jin-Woo Kim

doi:10.5395/JKACD.2004.29.6.515

Articles

Page Path: HOME > Restor Dent Endod > Volume 29(6); 2004 > Article

Original Article The influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth: Young-Gyun Lee, Hye-Jin Shin, Se-Hee Park, Kyung-Mo Cho, Jin-Woo Kim; 2004;29(6):-519.
DOI: https://doi.org/10.5395/JKACD.2004.29.6.515
Published online: November 30, 2004

Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Korea.

Corresponding author: Jin-Woo Kim. Department of Conservative Dentistry, College of Dentistry, Kangnung National University, Jibyun-Dong, Kangnung City, Kangwon-Do, Korea, 210-702. Tel: 82-33-640-3189, Fax: 82-33-640-3113, mendo7@kangnung.ac.kr

131 Views
0 Download
1 Crossref

prev next

Full Article

Download PDF

Abstract
REFERENCES

Abstract

Straight access cavity design allows the operator to locate all canals, helps in proper cleaning and shaping, ultimately facilitates the obturation of the canal system. However, change in the fracture strength according to the access cavity designs was not clearly demonstrated yet. The purpose of this study was to determine the influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth.

Recently extracted mandibular anterior teeth that have no caries, cervical abrasion, and fracture were divided into three groups (Group 1 : conventional lingual access cavity, Group 2 : straight access cavity, Group 3 : extended straight access cavity) according to the cavity designs. After conventional endodontic treatment, cavities were filled with resin core material. Compressive loads parallel to the long axis of the teeth were applied at a crosshead speed of 2mm/min until the fracture occurred. The fracture strength analyzed with ANOVA and the Scheffe test at the 95% confidence level.

The results of this study were as follows :
- 1. The mean fracture strength decrease in following sequence Group 1 (558.90 ± 77.40 N), Group 2 (494.07 ± 123.98 N) and Group 3 (267.33 ± 27.02 N).
- 2. There was significant difference between Group 3 and other groups (P = 0.00).
Considering advantage of direct access to apical third and results of this study, straight access cavity is recommended for access cavity form of the mandibular anterior teeth.
Keywords: Access cavity form; Lingual access cavity; Straight access cavity; Fracture strength; Mandibular anterior teeth

Figure 1

Access cavity forms used in this study

Figure 2

Schematic diagram of specimen used in this study

Table 1

Experimental groups of this study

Table 2

Fracture strength of experimental groups (N).

^* : p = 0.00

REFERENCES

1. Mauger MJ, Waite RM, Alexander JB, Schindler WG. Ideal endodontic access in mandibular incisors. J Endod. 1999;25(3):206-207.Article PubMed
2. Weine FS. Endodontic Therapy. 2003;6th ed. St. Louis: Mosby; 104-163.
3. Mannan G, Smallwood ER, Gulabivala K. Effect of access cavity location and design on degree and distribution of instrumented root canal surface in maxillary anterior teeth. Int Endod J. 2001;34(3):176-183.Article PubMed PDF
4. Benjamin KA, Dowson J. Incidence of two root canals in human mandibular incisor. Oral Surg Oral Med Oral Pathol. 1974;38(1):122-126.PubMed
5. LaTurno SAL, Zillich RM. Straight-line endodontic access to anterior teeth. Oral Surg Oral Med Oral Pathol. 1985;59(4):418-419.Article PubMed
6. Zillich RM, Jerome JK. Endodontic access to maxillary lateral incisors. Oral Surg Oral Med Oral Pathol. 1981;52(4):443-445.Article PubMed
7. Rhim EM, Choi HY, Park SJ, Choi GW. The canal system of mandibular incisors. J Korean Acad Conserv Dent. 2002;27(4):432-439.Article
8. Gutmann JL. The dentin-root complex: anatomic and biologic considerations in restoring endodontically treated teeth. J Prosthet Dent. 1992;67(4):458-467.Article PubMed
9. Reeh ES, Messer HH, Douglas WH. Reduction in tooth stiffness as a result of endodontic and restorative procedures. J Endod. 1989;15(11):512-516.Article PubMed
10. Chow TW. Mechanical effectiveness of root canal irrigation. J Endod. 1983;9(11):475-479.Article PubMed
11. Heydecke G, Butz F, Strub JR. Fracture strength and survival rate of endodontically treated maxillary incisors with approximal cavities after restoration with different post and core systems: an in-vitro study. J Dent. 2001;29(6):427-433.Article PubMed
12. Milot P, Stein RS. Root fracture in endodontically treated teeth related to post selection and crown design. J Prosthet Dent. 1992;68(3):428-435.Article PubMed
13. Sorensen JA, Engelman MJ. Ferrule design and fracture resistance of endodontically treated teeth. J Prosthet Dent. 1990;63(5):529-536.Article PubMed
14. Tidmarsh BG. Restoration of endodontically treated posterior teeth. J Endod. 1976;2(12):374-375.Article PubMed
15. Helfer AR, Melnick S, Schilder H. Determination of the moisture content of vital and pulpless teeth. Oral Surg Oral Med Oral Pathol. 1972;34(4):661-670.Article PubMed
16. Papa J, Cain C, Messer HH. Moisture content of vital vs endodontically treated teeth. Endod Dent Traumatol. 1994;10(2):91-93.Article PubMed
17. Rivera EM, Yamauchi M. Site comparisons of dentine collagen cross-links from extracted human teeth. Arch Oral Biol. 1993;38(7):541-546.Article PubMed

Tables & Figures

Figure 1

Access cavity forms used in this study

Figure 2

Schematic diagram of specimen used in this study

Table 1

Experimental groups of this study

Table 2

Fracture strength of experimental groups (N).

^* : p = 0.00

REFERENCES

1. Mauger MJ, Waite RM, Alexander JB, Schindler WG. Ideal endodontic access in mandibular incisors. J Endod. 1999;25(3):206-207.Article PubMed
2. Weine FS. Endodontic Therapy. 2003;6th ed. St. Louis: Mosby; 104-163.
3. Mannan G, Smallwood ER, Gulabivala K. Effect of access cavity location and design on degree and distribution of instrumented root canal surface in maxillary anterior teeth. Int Endod J. 2001;34(3):176-183.Article PubMed PDF
4. Benjamin KA, Dowson J. Incidence of two root canals in human mandibular incisor. Oral Surg Oral Med Oral Pathol. 1974;38(1):122-126.PubMed
5. LaTurno SAL, Zillich RM. Straight-line endodontic access to anterior teeth. Oral Surg Oral Med Oral Pathol. 1985;59(4):418-419.Article PubMed
6. Zillich RM, Jerome JK. Endodontic access to maxillary lateral incisors. Oral Surg Oral Med Oral Pathol. 1981;52(4):443-445.Article PubMed
7. Rhim EM, Choi HY, Park SJ, Choi GW. The canal system of mandibular incisors. J Korean Acad Conserv Dent. 2002;27(4):432-439.Article
8. Gutmann JL. The dentin-root complex: anatomic and biologic considerations in restoring endodontically treated teeth. J Prosthet Dent. 1992;67(4):458-467.Article PubMed
9. Reeh ES, Messer HH, Douglas WH. Reduction in tooth stiffness as a result of endodontic and restorative procedures. J Endod. 1989;15(11):512-516.Article PubMed
10. Chow TW. Mechanical effectiveness of root canal irrigation. J Endod. 1983;9(11):475-479.Article PubMed
11. Heydecke G, Butz F, Strub JR. Fracture strength and survival rate of endodontically treated maxillary incisors with approximal cavities after restoration with different post and core systems: an in-vitro study. J Dent. 2001;29(6):427-433.Article PubMed
12. Milot P, Stein RS. Root fracture in endodontically treated teeth related to post selection and crown design. J Prosthet Dent. 1992;68(3):428-435.Article PubMed
13. Sorensen JA, Engelman MJ. Ferrule design and fracture resistance of endodontically treated teeth. J Prosthet Dent. 1990;63(5):529-536.Article PubMed
14. Tidmarsh BG. Restoration of endodontically treated posterior teeth. J Endod. 1976;2(12):374-375.Article PubMed
15. Helfer AR, Melnick S, Schilder H. Determination of the moisture content of vital and pulpless teeth. Oral Surg Oral Med Oral Pathol. 1972;34(4):661-670.Article PubMed
16. Papa J, Cain C, Messer HH. Moisture content of vital vs endodontically treated teeth. Endod Dent Traumatol. 1994;10(2):91-93.Article PubMed
17. Rivera EM, Yamauchi M. Site comparisons of dentine collagen cross-links from extracted human teeth. Arch Oral Biol. 1993;38(7):541-546.Article PubMed

Citations

Citations to this article as recorded by

Fracture resistance of crown-root fractured teeth repaired with dual-cured composite resin and horizontal posts
Seok-Woo Chang, Yong-Keun Lee, Seung-Hyun Kyung, Hyun-Mi Yoo, Tae-Seok Oh, Dong-Sung Park
Journal of Korean Academy of Conservative Dentistry.2009; 34(5): 383. CrossRef

CanvasJS.com

ePub Link

Cite

CITE: export Copy Download Format; Close

Download Citation

Download a citation file in RIS format that can be imported by all major citation management software, including EndNote, ProCite, RefWorks, and Reference Manager.

Format:

RIS — For EndNote, ProCite, RefWorks, and most other reference management software
BibTeX — For JabRef, BibDesk, and other BibTeX-specific software

Include:

Citation for the content below
Citation and abstract for the content below

The influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth

J Korean Acad Conserv Dent. 2004;29(6):515-519. Published online November 30, 2004

DOI: https://doi.org/10.5395/JKACD.2004.29.6.515

XML Download

Figure

The influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth

Figure 1 Access cavity forms used in this study

Figure 2 Schematic diagram of specimen used in this study

Figure 1

Figure 2

The influence of different access cavity designs on the fracture strength in endodontically treated mandibular anterior teeth

Table 1

Experimental groups of this study

Table 2

Fracture strength of experimental groups (N).

^* : p = 0.00

Table 1 Experimental groups of this study

Table 2 Fracture strength of experimental groups (N).

^* : p = 0.00