Journal of the korean academy of Pediatric Dentistry (대한소아치과학회지)

Korean Academy of Pediatric Dentistry (대한소아치과학회)
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MORPHOLOGICAL FEATURES OF THE CROWNS OF MAXILLARY SECOND PRIMARY MOLAR AND FIRST PERMANENT MOLAR: AN ODONTOMETRIC STUDY

상악 제2유구치와 상악 제1대구치의 치관 형태: 치아계측학적 연구

  • Kim, Ji-In (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Hyun, Hong-Keun (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Kim, Young-Jae (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Kim, Jung-Wook (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Jang, Ki-Taeg (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Lee, Sang-Hoon (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Hahn, Se-Hyun (Department of Pediatric Dentistry, School of Dentistry, Seoul National University) ;
  • Kim, Chong-Chul (Department of Pediatric Dentistry, School of Dentistry, Seoul National University)
  • 김지인 (서울대학교 치의학대학원 소아치과학교실) ;
  • 현홍근 (서울대학교 치의학대학원 소아치과학교실) ;
  • 김영재 (서울대학교 치의학대학원 소아치과학교실) ;
  • 김정욱 (서울대학교 치의학대학원 소아치과학교실) ;
  • 장기택 (서울대학교 치의학대학원 소아치과학교실) ;
  • 이상훈 (서울대학교 치의학대학원 소아치과학교실) ;
  • 한세현 (서울대학교 치의학대학원 소아치과학교실) ;
  • 김종철 (서울대학교 치의학대학원 소아치과학교실)
  • Received : 2011.06.30
  • Accepted : 2011.10.10
  • Published : 2011.11.30
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Abstract

The basic structure of the primary crowns usually resemble their succeeding permanent teeth. However, maxillary second primary molars resemble ipsilateral first permanent molars. Accordingly in this study, odontometric data of the two teeth was obtained, then analyzed to verify the morphological relationship and sex difference between the two teeth. Dental study casts were examined for their mesiodistal and buccolingual width of the crowns, diameter of each cusps, and intercuspal distances. Photographs of the crowns were taken to measure the angles between each cusp tip. The results are as follows : 1. In boys, PrI, PaI, DBC angle, and MBC angle did not show any statistically significant difference between the two teeth(p>0.05), and moderate level of correlations were observed. 2. In girls, crown index, DBC angle, and MBC angle of the two teeth did not show any statistically significant difference(p>0.05), and moderate level of correlations were recognized. 3. Measurements that did not show statistically significant difference between the two teeth in both boys and girls were DBC angle and MBC angle(p>0.05). In DLC angle, however, statistically significant difference was observed(p<0.01). 4. Most of the measurements showed sex differences, except DBC angle, which did not show any sex difference in both teeth(p>0.05).

유치 치관의 기본적인 구조는 대개 계승 영구치를 닮는다. 그러나 제2유구치는 계승 영구치인 제2소구치보다 오히려 제1대 구치와 더 유사한 경향이 있다. 이에 본 연구는 한국인에서 상악 제2유구치와 제1대구치의 치아계측학적 자료(odontometric data)를 얻어 두 치아의 형태와 크기 사이의 연관성을 살펴보고, 나아가 남녀간의 차이점 유무를 고찰해 보고자 하였다. 남아 150명, 여아 150명 총 300명의 모형을 이용하여 상악 제2유구치와 상악 제1대구치의 근원심 치관 폭경, 협설측 치관 폭경, 각 교두의 직경, 교두정간 거리를 계측하였고, 치관의 교합면 사진을 촬영하여 각 교두정 사이의 각도를 측정하여 다음과 같은 결과를 얻었다. 1. 남아에서 Protocone index, Paraconeindex, Distobuccal cusp(DBC)각, Mesiobuccal cusp(MBC)각은 상악 제1대 구치와 제2유구치 사이에 통계적 유의차가 관찰되지 않았고(p>0.05), 중등도의 상관관계가 확인되었다. 2. 여아에서 crown index, Distobuccal cusp(DBC)각, Mesiobuccal cusp(MBC)각은 상악 제1대구치와 제2유구치 사이에 통계적 유의차가 관찰되지 않았고(p>0.05), 중등도의 상관관계가 확인되었다. 3. 남, 여 모두에서 Distobuccal cusp(DBC)각, Mesiobuccal cusp(MBC)각은 두 치아 사이에 유의할만한 차이를 보이지 않았고(p>0.05), Distolingual cusp(DLC)각에서는 통계적 유의차가 관찰되었다(p<0.01). 4. 대부분의 계측치에서 남녀 차이를 나타냈지만, Distobuccal cusp (DBC)각은 상악 제1대구치와 제2유구치 모두에서 남녀 차이를 보이지 않았다(p>0.05).

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References

  1. Puri N, Pradhan KL, Chandna A, et al. : Biometric study of tooth size in normal, crowded, and spaced permanent dentitions. Am J Orthod Dentofacial Orthop, 132:279. e7-e14, 2007.
  2. Bishara SE, Jakobsen JR, Abdallah EM, Fernandez Garcia A : Comparisons of mesiodistal and buccolingual crown dimensions of the permanent teeth in three populations from Egypt, Mexico, and the United States. Am J Orthod Dentofacial Orthop, 96:416-422, 1989. https://doi.org/10.1016/0889-5406(89)90326-0
  3. Townsend GC, Brown T : Heritability of permanent tooth size. Am J Phys Anthropol, 49:497-504, 1978. https://doi.org/10.1002/ajpa.1330490409
  4. Guagliardo MF : Tooth crown size differences between age groups: a possible new indicator of stress in skeletal samples. Am J Phys Anthropol, 58:383-389, 1982. https://doi.org/10.1002/ajpa.1330580405
  5. Dempsey PJ, Townsend GC : Genetic and environmental contributions to variation in human tooth size. Heredity, 86:685-693, 2001. https://doi.org/10.1046/j.1365-2540.2001.t01-1-00878.x
  6. Moorrees CF, Reed RB : Correlations among crown diameters of human teeth. Arch Oral Biol, 9:685-697, 1964. https://doi.org/10.1016/0003-9969(64)90080-9
  7. Kraus BS, Jordan RE : The human dentition before birth. Lea and Febiger, Philadelphia, 81-118, 1965.
  8. Butler PM : The prenatal development of the human first upper permanent molar. Arch Oral Biol, 12:551-563, 1967. https://doi.org/10.1016/0003-9969(67)90030-1
  9. Kondo S, Townsend GC : Associations between Carabelli trait and cusp areas in human permanent maxillary first molars. Am J Phys Anthropol, 129:196-203, 2006. https://doi.org/10.1002/ajpa.20271
  10. Takahashi M, Kondo S, Townsend GC, Kanazawa E : Variability in cusp size of human maxillary molars, with particular reference to the hypocone. Arch Oral Biol, 52:1146-1154, 2007. https://doi.org/10.1016/j.archoralbio.2007.06.005
  11. Gingerich PD : Size variability of the teeth in living mammals and the diagnosis of closely related sympatric fossil species. J Paleo, 48:895-903, 1974.
  12. Edgar HJ, Lease LR : Correlations between deciduous and permanent tooth morphology in a European American sample. Am J Phys Anthropol, 133:726-734, 2007. https://doi.org/10.1002/ajpa.20564
  13. Smith P, Koyoumdjisky-Kaye E, Kalderon W, Stern D : Directionality of dental trait frequency between human second deciduous and first permanent molars. Arch Oral Biol, 32:5-9, 1987. https://doi.org/10.1016/0003-9969(87)90146-4
  14. Saunders SR, Mayhall JT : Fluctuating asymmetry of dental morphological traits : New interpretations. Hum Biol, 54:789-799, 1982.
  15. Butler PM : Studies of the mammalian dentition-Differentiation of the post-canine dentition. Proc Zool Soc Lond B, 109:1-36, 1939.
  16. Townsend G, Harris EF, Lesot H, et al. : Morphogenetic fields within the human dentition : A new, clinically relevant synthesis of an old concept. Archs oral Biol, 54 Suppl 1:s34-44, 2009. https://doi.org/10.1016/j.archoralbio.2008.06.011
  17. Butler PM : Comparison of the development of the second deciduous molar and first permanent molar in man. Arch Oral Biol, 12:1245-1260, 1967. https://doi.org/10.1016/0003-9969(67)90126-4
  18. Kondo S, Wakatsuki E, Shun-Te H, et al. : Comparison of the crown dimensions between the maxillary second deciduous molar and the first permanent molar. Okajimas Folia Anat Jpn, 73:179-184, 1996. https://doi.org/10.2535/ofaj1936.73.4_179
  19. Smith P, Gomorri JM, Spitz S, Becker J : Model for the examination of evolutionary trends in tooth development. Am J Phys Anthropol, 102:283-294, 1997. https://doi.org/10.1002/(SICI)1096-8644(199702)102:2<283::AID-AJPA9>3.0.CO;2-Z
  20. Jensen E, KAI-JEN YEN P, Moorrees CF, Thomsen SO : Mesiodistal crown diameters of the deciduous and permanent teeth in individuals. J Dent Res, 36:39-47, 1957. https://doi.org/10.1177/00220345570360011501
  21. Kraus BS, Jordan RE, Abrams L : Kraus' Dental anatomy and occlusion, 2nd ed., Williams and Wilkins, Baltimore, 69-129. 1969.
  22. 백병주, 전소희, 김재곤, 김영신 : 유치의 치아크기에 관한 연구. 대한소아치과학회지, 29:382-388, 2002.
  23. 백병주, 박정렬, 김재곤, 이두철 : 영구치의 치아크기에 관한 연구. 대한소아치과학회지, 30:502-509, 2003.
  24. Black TK : Sexual dimorphism in the tooth-crown diameters of the deciduous teeth. Am J Phys Anthropol, 48:77-82, 1978. https://doi.org/10.1002/ajpa.1330480111
  25. Yuen KK, So LL, Tang EL : Mesiodistal crown diameters of the primary and permanent teeth in southern Chinese-a longitudinal study. Eur J Orthod, 19:721-731, 1997. https://doi.org/10.1093/ejo/19.6.721
  26. Kondo S, Funatsu T, Wakatsuki E, et al. : Sexual Dimorphism in the tooth crown dimension of the second deciduous and first permanent molars of Taiwan Chinese. Okajimas Folia Anat Jpn, 75:239-246, 1998. https://doi.org/10.2535/ofaj1936.75.5_239
  27. Garn SM, Lewis AB, Swindler DR, Kerewsky RS : Genetic control of sexual dimorphism in tooth size. J Dent Res, 46:963-972, 1967. https://doi.org/10.1177/00220345670460055801
  28. Bravo N, Facal M, Maroto M, Barberia E : Relationship between mesiodistal crown diameters of permanent first molars and deciduous second molars. Eur J Paediatr Dent, 11:115-121, 2010. https://doi.org/10.1007/BF03262726
  29. Kondo S, Townsend GC, Yamada H : Sexual dimorphism of cusp dimensions in human maxillary molars. Am J Phys Anthropol, 128:870-877, 2005. https://doi.org/10.1002/ajpa.20084
  30. Kay RF, Hiiemae KM : Jaw movement and tooth use in recent and fossil primates. Am J Phys Anthropol, 40:227-256, 1974. https://doi.org/10.1002/ajpa.1330400210
  31. 배찬주, 이종갑 : 유치와 계승영구치의 근원심 폭경에 관한 연구. 대한소아치과학회지, 12:163-173, 1985.