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[Access cavity preparation for mandibular incisors with suspected two canals]
Zhonghua Ya Yi Xue Hui Za Zhi
|March 1, 1989
Summary
Many Chinese lower incisors have double root canals, often missed by X-rays. Access cavity preparation should extend to the incisal edge to locate these canals and prevent endodontic failure.
Area of Science:
- Endodontics
- Dental Anatomy
- Radiology
Context:
- Incomplete root canal obturation is a leading cause of endodontic treatment failure.
- Previous research indicates a prevalence of 10-45% for double canals in mandibular incisors.
- Understanding root canal anatomy is crucial for successful endodontic therapy.
Purpose:
- To determine the incidence of double canals in Chinese mandibular incisors.
- To evaluate the efficacy of X-rays in detecting these double canals.
- To propose an optimized access cavity preparation method for mandibular incisors with double canals.
Summary:
- This study examined 100 Chinese mandibular incisors using dental X-rays from multiple angles.
- A significant incidence of 36% for double canals was found, with only 2% exhibiting separate apical foramina.
- X-ray imaging proved limited in definitively locating double canals, especially in the middle root third.
Impact:
- The findings highlight the prevalence of complex root canal anatomy in mandibular incisors.
- A clinical recommendation is provided: extend access cavity preparation to the incisal edge when lingual canals are suspected or obscured on X-rays.
- This approach aims to improve root canal treatment outcomes by ensuring complete canal obturation and reducing endodontic failures.