Removal of unerupted teeth
John Dudley Langdon, Mohan Francis Patel, Robert Andrew Ord, Peter Brennan in Operative Oral and Maxillofacial Surgery, 2017
Mandibular canine teeth may remain unerupted because they are ectopic or because of a lack of space for their relatively late eruption. Surgical removal is achieved by a buccal approach, usually with a two-sided flap. The relieving incision of this flap should be sufficiently mesial to avoid damage the mental nerve as it exits the mandible and to allow subsequent closure of the incision to be supported by intact bone (away from the site of bone and tooth removal). If the crown of the unerupted canine is not visible after a flap has been reflected, a water-cooled rosehead bur should be used to expose the tooth with superficial strokes at the site revealed by available imaging to represent its most likely location in order to minimize damage to adjacent teeth. Once the crown and upper portion of the root have been exposed, it is often possible to deliver the canine tooth with the use of elevators at its mesial and distal aspects. If this is not the case, the tooth should be decoronated to allow the crown and root to be elevated separately. The operator must ensure that the mental nerve which is frequently closely related to the crown of the unerupted canine is protected from compression during the elevation of the tooth or from the use of a flap retractor as both can produce post-operative neuropathy (Figure 6.9).
Mechanisms of Fibril Formation and Cellular Response
Martha Skinner, John L. Berk, Lawreen H. Connors, David C. Seldin in XIth International Symposium on Amyloidosis, 2007
Twenty-one consecutive patients seen at the Paramiloidose Clinical Unit of Hospital Geral S. Antonio, Porto, Portugal, (age: 17-63 SD: 10.61) were included in the study to make a clinical observation for Stomatology to exclude oro-facial pathology, namely odontogenic infections, before liver transplantation. All the patients were TTR Met30 positive by genetic studies. Distribution of the twenty-one patients was: twelve men, nine women. The staging of the disease was as follows: ten patients in stage I, five patients in stage II, and six patients in stage III. All patients were screened for the TTR Met30 variant, and electrophysiological evidence of axonal polyneuropathy according to previously published criteria. LSG biopsy was performed using local anaesthesia (3% lidocaine). The lip was everted and a 3-5 mm longitudinal incision was made in the labial mucosa in front of the mandibular canine tooth. Four minor salivary glands were removed per biopsy. Each specimen was cut in two portions for formol 10% and glutheraldeid 2.5%, to study by optical microscopy and electronic microscopy. The control group was comprised of eleven healthy individuals (age: 15-72, SD: 9.98), i.e., six men and five women. Amyloid deposits were detected in LSG biopsy samples by Congo red staining. Immunohistochemical characterization of amyloid deposits was performed using antisera against TTR Met30.
Dental Anatomy and Occlusion
Jeffrey R. Marcus, Detlev Erdmann, Eduardo D. Rodriguez in Essentials of CRANIOMAXILLOFACIAL TRAUMA, 2014
The position of the cuspids or canines during occlusion has also been used to describe a proper relationship between maxillary and mandibular dentition. When the first permanent molars are in a class I relationship, the mandibular canine occludes mesial to the maxillary canine in the embrasure between the maxillary canine and lateral incisor (see Fig. 4-10, A).
Sex-specific reference values for the crown heights of permanent anterior teeth and canines for assessing tooth wear
Published in Acta Odontologica Scandinavica, 2023
Paula Roca-Obis, Ona Rius-Bonet, Carla Zamora-Olave, Eva Willaert, Jordi Martinez-Gomis
Table 4 shows the 3rd, 5th, 10th, 25th, 50th and 75th percentiles for clinical crown height by tooth group and sex. Sexual dimorphism was detected in all two maxillary anterior tooth types and in maxillary and mandibular canines. Reference values for the clinical crown heights of unworn teeth measured from gingival margin to incisal edge are shown in Figure 3, where they are expressed as 10th percentiles, rounded to the nearest 0.5 mm and grouped by sex. Reference values were 7.5 mm for mandibular central and lateral incisors in both sexes and maxillary lateral incisor for women, 8.0 mm for maxillary lateral incisor in men, 8.5 mm for maxillary canine in women, 9.0 mm for maxillary central incisor and mandibular canine in women and maxillary canine in men and 9.5 mm for maxillary central incisor and mandibular canine in men.
Age estimation in children based on open apices measurement in the Serbian population: Belgrade Age Formula (BAF)
Published in Annals of Human Biology, 2020
Ksenija Zelic, Nemanja Marinkovic, Petar Milovanovic, Roberto Cameriere, Marija Djuric, Nenad Nedeljkovic
To perform the BAF, we still need the presence of the first 7 permanent teeth in the lower jaw, but the only information we need from the other 5 teeth is whether the apex is closed or not. The advantage of this approach is the possibility of performing the age estimation even if the crown of these teeth is destroyed. Statistical analysis showed that significant predictors of dental age in our Serbian sample were the lower canine and second molar. In our opinion, these teeth are suitable for age estimation for several reasons. The second molar is the last to finish its growth and development, between 14 and 15 years of age. Therefore, it could be a useful tool for age estimation up to this age. Likewise, the crown of the second molar remains intact for a long period since it is formed between ages 7 and 8 (Pahel et al. 2017), and tooth eruption is expected between ages 11 and 13 (“12-y molars”). The crown of the first molar is formed between ages 2.5 and 3 (Pahel et al. 2017) and it emerges between ages 6 and 7 (“6-y molars”), therefore at the age of 9 it might be possible to notice a caries lesion or crown filling, which might interrupt the use of this tooth for age estimation. The second molars are less exposed to attrition than other teeth, which grow earlier in life (Demko Rihter et al. 2015), so there is no reduction of clinical crown length that could have an influence on tooth ratio and final age estimation outcome. Furthermore, it was reported (Dalessandri et al. 2017) that the mandibular canine has a low incidence of impaction (between 0.92 and 5.1%) and transmigration (0.1 to 0.31%), which enables acceptable tooth position for radiological analysis.
Association between dental and skeletal maturation in Scandinavian children born between 2005 and 2010
Published in Acta Odontologica Scandinavica, 2023
Astrid Rathcke Poulsen, Liselotte Sonnesen
The DM stages in the mandible based on Haavikko’s method in relation to the SM stages are presented in Tables 6 and 7. The mandibular canine and the mandibular second premolar in the DM stage R3/4 were significantly positively associated with the SM stage PP2= or SM stage S when adjusted for age and sex (p < .05 and p < .001, respectively, highlighted in Table 6). These results indicate that when the roots of the mandibular canines and the mandibular second premolars are ¾ formed (DM stage R3/4), this is significantly associated with either the beginning of the adolescent period (SM stage PP2=) or shortly before PHV (SM stage S, approx. 1 year according to [1], Figure 2).
Related Knowledge Centers
- Canine Tooth
- Incisor
- Mouth
- Tooth
- Face
- Mandibular Lateral Incisor
- Mandibular First Premolar
- Chewing
- Cusp
- Prehensility