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Radix entomolaris: identification and morphology.

O Carlsen¹, V Alexandersen

¹Department of Dental Morphology, Royal Dental College, Copenhagen, Denmark.

Scandinavian Journal of Dental Research

|October 1, 1990

Summary

Radix entomolaris (RE), a supernumerary root in mandibular molars, was studied in 398 human teeth. This research established identification criteria and mapped RE variants and clinical variables for dental professionals.

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Area of Science:

Dental Morphology
Anthropology
Endodontics

Background:

The Royal Dental College in Copenhagen possesses a significant collection of human teeth.
This collection includes 398 permanent mandibular molars exhibiting a lingually-located supernumerary root, known as radix entomolaris (RE).

Purpose of the Study:

To establish uniform and precise criteria for identifying radix entomolaris (RE) in mandibular first, second, and third molars (M1 inf, M2 inf, M3 inf).
To map the representation of different RE variants across tooth types.
To register relevant clinical variables associated with RE, including separation, divergence, apical bend, apical gracility, and fusion.

Main Methods:

Analysis of a large collection of 398 human permanent mandibular molars.
Inclusion of both separate and non-separate radix entomolaris (RE) specimens.
Qualitative and non-metric investigation of RE variants and associated clinical variables.

Main Results:

Development of standardized criteria for the identification of radix entomolaris (RE) in mandibular molars.
Mapping of the distribution of RE variants across different mandibular molar types.
Registration of key clinical variables such as degree of separation, divergence, apical bend, apical gracility, and fusion in RE.

Conclusions:

The study provides a comprehensive analysis of radix entomolaris (RE) morphology and its variants.
The established identification criteria and mapped variants are valuable for clinical dentists, dental morphologists, and anthropologists.
This research contributes to a better understanding of mandibular molar anatomy and potential clinical implications of RE.

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