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Maxillary first molar agenesis and other dental anomalies.
Angle Orthod. 2010 Nov; 80(6):1002-9.AO

Abstract

OBJECTIVE

To explore the association of maxillary first molar agenesis with other dental anomalies in Japanese orthodontic patients.

MATERIALS AND METHODS

A total of 32 subjects with one or two congenitally missing maxillary first molars (group M) were selected and divided into group 1M (12 subjects with one maxillary first molar missing) and group 2M (20 subjects with two maxillary first molars missing). As controls, 32 sex-matched subjects without agenesis of maxillary first molars were collected (group C). Panoramic and periapical radiographs, cephalograms, study models, intraoral photographs, and anamnestic data were used to identify anomalies of permanent teeth. Chi-square, Fisher's exact, Kruskal-Wallis, and Steel-Dwass tests were used to make statistical comparisons.

RESULTS

The prevalence rates of tooth agenesis other than the maxillary first molars and advanced tooth agenesis, with third molars excluded, were significantly higher in group 2M than in group C. The absence of second premolars was most common. The prevalence rate of third molar agenesis was significantly higher in groups 1M and 2M than in group C. The occurrence of symmetrical agenesis of the mandibular third molars was particularly notable in group 2M as compared to group 1M, in which maxillary third molar agenesis was predominant. There was no significant association between maxillary first molar agenesis and other dental anomalies, except for agenesis of teeth other than maxillary first molars.

CONCLUSION

Agenesis of maxillary first molars is associated with a higher prevalence of other permanent tooth agenesis and advanced tooth agenesis.

Authors+Show Affiliations

The Nippon Dental University Niigata Hospital, Niigata, Japan.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

20677947

Citation

Abe, Ryota, et al. "Maxillary First Molar Agenesis and Other Dental Anomalies." The Angle Orthodontist, vol. 80, no. 6, 2010, pp. 1002-9.
Abe R, Endo T, Shimooka S. Maxillary first molar agenesis and other dental anomalies. Angle Orthod. 2010;80(6):1002-9.
Abe, R., Endo, T., & Shimooka, S. (2010). Maxillary first molar agenesis and other dental anomalies. The Angle Orthodontist, 80(6), 1002-9. https://doi.org/10.2319/020210-69.1
Abe R, Endo T, Shimooka S. Maxillary First Molar Agenesis and Other Dental Anomalies. Angle Orthod. 2010;80(6):1002-9. PubMed PMID: 20677947.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Maxillary first molar agenesis and other dental anomalies. AU - Abe,Ryota, AU - Endo,Toshiya, AU - Shimooka,Shohachi, PY - 2010/8/4/entrez PY - 2010/8/4/pubmed PY - 2010/12/14/medline SP - 1002 EP - 9 JF - The Angle orthodontist JO - Angle Orthod VL - 80 IS - 6 N2 - OBJECTIVE: To explore the association of maxillary first molar agenesis with other dental anomalies in Japanese orthodontic patients. MATERIALS AND METHODS: A total of 32 subjects with one or two congenitally missing maxillary first molars (group M) were selected and divided into group 1M (12 subjects with one maxillary first molar missing) and group 2M (20 subjects with two maxillary first molars missing). As controls, 32 sex-matched subjects without agenesis of maxillary first molars were collected (group C). Panoramic and periapical radiographs, cephalograms, study models, intraoral photographs, and anamnestic data were used to identify anomalies of permanent teeth. Chi-square, Fisher's exact, Kruskal-Wallis, and Steel-Dwass tests were used to make statistical comparisons. RESULTS: The prevalence rates of tooth agenesis other than the maxillary first molars and advanced tooth agenesis, with third molars excluded, were significantly higher in group 2M than in group C. The absence of second premolars was most common. The prevalence rate of third molar agenesis was significantly higher in groups 1M and 2M than in group C. The occurrence of symmetrical agenesis of the mandibular third molars was particularly notable in group 2M as compared to group 1M, in which maxillary third molar agenesis was predominant. There was no significant association between maxillary first molar agenesis and other dental anomalies, except for agenesis of teeth other than maxillary first molars. CONCLUSION: Agenesis of maxillary first molars is associated with a higher prevalence of other permanent tooth agenesis and advanced tooth agenesis. SN - 1945-7103 UR - https://www.unboundmedicine.com/medline/citation/20677947/Maxillary_first_molar_agenesis_and_other_dental_anomalies_ L2 - http://www.angle.org/doi/10.2319/020210-69.1?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -