Braz Dent J (1995) 6(2): 143-146 ISSN 0103-6440
| Introduction | Case
report | Discussion | References
The authors present a case report of a radicular groove in a maxillary
lateral incisor in a 58-year old male patient. Endodontic and periodontal
treatment was not carried out and therefore, avulsion of the tooth was
indicated. The radicular grooves were very deep with pulp chamber communication.
Key words:radicular groove, maxillary lateral incisor.
Withers et al. (1981) studied the incidence of lingual gingival grooves in 2099 teeth from 531 patients and detected the presence of radicular grooves in 2.3% of the central and lateral maxillary incisors examined. Periodontal problems were associated with the presence of radicular grooves.
Pécora et al. (1991) examined in vitro 500 maxillary central incisors and 421 maxillary lateral incisors and reported the presence of radicular grooves in 2% of the central incisors and 2.6% of the lateral incisors. All of the radicular grooves of maxillary lateral incisors were located on the lingual surface.
Pécora and Cruz Filho (1992) examined the incidence of radicular
grooves in the upper incisors of 642 patients and found this morphologic
defect in 3.9% of the patients. Most of the radicular grooves were found
on the lingual surface of the maxillary lateral incisors (3%). The maxillary
central incisors showed radicular grooves on both the buccal and lingual
surfaces (0.9%). The radicular grooves began on the lingual surface of
the crown of the maxillary lateral incisors and extended to the root. They
may reach the cervical region or the medial region and in many cases reach
the apical region.
Due to the poor conservation of the teeth, the high incidence of caries and poor buccal hygiene, this tooth was avulsed. Figure 1 shows the lingual surface of this tooth with the radicular grooves visible from the crown to the apical region.
Scanning electron microscope of the extracted tooth showed that the
deep radicular grooves communicated with the pulp chamber (Figure 2).
1 - Left, Lingual surface of tooth with radicular grooves visible from
the crown to the apical region. Right, X-ray showing the presence of a
radiolucent area around the root of the tooth.
2 - Deep radicular grooves communicating with the pulp chamber shown by
scanning electron microscope.
The presence of a radicular groove is easily detected in the crown, but it is very difficult to detect in the root because the radiographic image is normally in the same direction as the pulp chamber, superimposing the image. Figure 1 clearly shows the radicular groove in the crown. In this case, scanning electron microscopy showed the depth of the groove which showed that if the radicular canal had been treated, there would have been a poor prognosis.
Professionals must be aware of the possible existence of radicular grooves
in order to insure correct diagnosis and a better prognosis and to instruct
the patient on the necessity of good oral hygiene to prevent periodontal
problems (Pécora et al., 1991).
Lee KW, Lee EC, Poon KY: Palato-gingival grooves in maxillary incisor. Br Dent J 124: 14-18, 1968
Meister F, Keating K, Gerstein H, Mayer JC: Successful treatment of a radicular lingual groove: case report. J Endod 9: 561-564, 1983
Pécora JD, Sousa Neto MD, Santos TC, Saquy PC: In vitro study of the incidence of radicular grooves in maxillary incisors. Braz Dent J 2: 69-73, 1991
Pécora JD, Cruz Filho AM: Study of the incidence of radicular grooves in maxillary incisor. Braz Dent J 3: 11-16, 1992
Withers JA, Brunsvold MA, Killoy WJ, Rabe AJ: The relationship of palato-gingival
grooves to localized periodontal disease. J Periodontol 52: 41-44, 1981
Correspondence: Prof. Jesus Djalma Pécora, Departamento
de Odontologia Restauradora, Faculdade de Odontologia de Ribeirão
Preto, Universidade de São Paulo, 14040-904, Ribeirão Preto,
SP, Brasil. E-mail: firstname.lastname@example.org.
Accepted June 20, 1995
Electronic publication: March, 1996