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Increased occurrence of dental anomalies associated with second-premolar agenesis.
Angle Orthod. 2009 May; 79(3):436-41.AO

Abstract

OBJECTIVE

To evaluate the prevalence of dental anomalies in patients with agenesis of second premolars and compare the findings with the prevalence of these anomalies in the general population.

MATERIALS AND METHODS

A Brazilian sample of 203 patients aged 8 to 22 years was selected. All patients presented agenesis of at least one second premolar. Panoramic and periapical radiographs and dental casts were used to analyze the presence of other associated dental anomalies, including agenesis of other permanent teeth, ectopia of unerupted permanent teeth, infraocclusion of deciduous molars, microdontia of maxillary lateral incisors, and supernumerary teeth. The occurrence of these anomalies was compared with occurrence data previously reported for the general population. Statistical testing was performed using the chi-square test (P < .05) and the odds ratio.

RESULTS

The sample with agenesis of at least one second premolar presented a significantly increased prevalence rate of permanent tooth agenesis (21%), excluding third molars. Among the sample segment aged 14 years or greater (N = 77), occurrence of third-molar agenesis (48%) exceeded twice its normal frequency. Significant increases in occurrence of microdontia of maxillary lateral incisors (20.6%), infraocclusion of deciduous molars (24.6%), and distoangulation of mandibular second premolars (7.8%) were observed. Palatally displaced canine anomaly was also significantly elevated (8.1%).

CONCLUSION

The results provide evidence that agenesis of other permanent teeth, microdontia, deciduous molar infraocclusion, and certain dental ectopias are the products of the same genetic mechanisms that cause second-premolar agenesis.

Authors+Show Affiliations

Department of Orthodontics, University of São Paulo City, Brazil. dgarib@uol.com.brNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19413376

Citation

Garib, Daniela G., et al. "Increased Occurrence of Dental Anomalies Associated With Second-premolar Agenesis." The Angle Orthodontist, vol. 79, no. 3, 2009, pp. 436-41.
Garib DG, Peck S, Gomes SC. Increased occurrence of dental anomalies associated with second-premolar agenesis. Angle Orthod. 2009;79(3):436-41.
Garib, D. G., Peck, S., & Gomes, S. C. (2009). Increased occurrence of dental anomalies associated with second-premolar agenesis. The Angle Orthodontist, 79(3), 436-41. https://doi.org/10.2319/021308-87.1
Garib DG, Peck S, Gomes SC. Increased Occurrence of Dental Anomalies Associated With Second-premolar Agenesis. Angle Orthod. 2009;79(3):436-41. PubMed PMID: 19413376.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Increased occurrence of dental anomalies associated with second-premolar agenesis. AU - Garib,Daniela G, AU - Peck,Sheldon, AU - Gomes,Simone Carinhena, PY - 2008/02/01/received PY - 2008/05/01/accepted PY - 2009/5/6/entrez PY - 2009/5/6/pubmed PY - 2009/9/16/medline SP - 436 EP - 41 JF - The Angle orthodontist JO - Angle Orthod VL - 79 IS - 3 N2 - OBJECTIVE: To evaluate the prevalence of dental anomalies in patients with agenesis of second premolars and compare the findings with the prevalence of these anomalies in the general population. MATERIALS AND METHODS: A Brazilian sample of 203 patients aged 8 to 22 years was selected. All patients presented agenesis of at least one second premolar. Panoramic and periapical radiographs and dental casts were used to analyze the presence of other associated dental anomalies, including agenesis of other permanent teeth, ectopia of unerupted permanent teeth, infraocclusion of deciduous molars, microdontia of maxillary lateral incisors, and supernumerary teeth. The occurrence of these anomalies was compared with occurrence data previously reported for the general population. Statistical testing was performed using the chi-square test (P < .05) and the odds ratio. RESULTS: The sample with agenesis of at least one second premolar presented a significantly increased prevalence rate of permanent tooth agenesis (21%), excluding third molars. Among the sample segment aged 14 years or greater (N = 77), occurrence of third-molar agenesis (48%) exceeded twice its normal frequency. Significant increases in occurrence of microdontia of maxillary lateral incisors (20.6%), infraocclusion of deciduous molars (24.6%), and distoangulation of mandibular second premolars (7.8%) were observed. Palatally displaced canine anomaly was also significantly elevated (8.1%). CONCLUSION: The results provide evidence that agenesis of other permanent teeth, microdontia, deciduous molar infraocclusion, and certain dental ectopias are the products of the same genetic mechanisms that cause second-premolar agenesis. SN - 0003-3219 UR - https://www.unboundmedicine.com/medline/citation/19413376/Increased_occurrence_of_dental_anomalies_associated_with_second_premolar_agenesis_ L2 - http://www.angle.org/doi/10.2319/021308-87.1?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -