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  3. Evaluation of the occlusal relationship of canine teeth with primary molars in three to five year old children of Mashhad city

Evaluation of the occlusal relationship of canine teeth with primary molars in three to five year old children of Mashhad city

Number of pages: 66 File Format: word File Code: 31966
Year: 2012 University Degree: Master's degree Category: Medical Sciences
Tags/Keywords: baby tooth - Canine teeth - Dental occlusion - Dentistry - Milk molars - Occlusal communication - occlusion - Second milk molar
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  • Summary of Evaluation of the occlusal relationship of canine teeth with primary molars in three to five year old children of Mashhad city

    Dissertation to receive a doctorate degree in dentistry

    Summary:

    Introduction and purpose: It is important to evaluate occlusion during the period of milk teeth in order to recognize and correct occlusal problems during the development of teeth and to have a natural occlusion in adulthood. Because in children, occlusion examination, especially in the area of ??milk molars, requires skill, while examination of canine relationships is much easier. If a relationship between canines and molars is obtained, canine examination can be used as the first step of occlusion examination. The purpose of this research is to obtain a relationship between the position of canines and primary molars in the central occlusion of children. Materials and methods: This study was conducted on 281 children aged 3-5 years who had 20 erupted primary teeth and no proximal caries in Mashhad. Relationships of second molars. Shiri, the canines were examined in relation to central occlusion using a disposable mirror and head lamp in relation to age and sex. Findings: In total, 61% of the cases that had class one canine occlusion had a mesial step molar relationship, 62.3% of those who had class two canine occlusion had a flush terminal molar relationship, and 52.6% of those who had class three canine occlusion had a relationship mesial step molars. Also, in people with class three canine occlusion, the distal step molar relation was not observed at all. The highest prevalence of molar occlusion is related to flush terminal plan (50.2%) and the highest prevalence of canine occlusion is related to class two (49.1%), which is the most related to the situation where the tip of the upper canine is located in the range of 1.3 behind the lower canine (87%).

    Conclusion: In this study A significant relationship was found between canine and molar occlusion (p=0.00<0.05). Therefore, in young or non-cooperative children, it is possible to understand the molar relationship by examining the relationship of canines.

    Key words: deciduous canine, deciduous second molar, period of deciduous teeth, dental occlusion

    Chapter One:

    Review of texts and articles

    Introduction:

    Nowadays, the importance of prevention over treatment is not hidden from anyone. This priority not only has individual effects, but it will also have social and economic consequences.

    In children's dentistry, due to the fact that the placement of baby teeth is one of the most determining factors in the pairing of permanent teeth, therefore, the study of occlusion during the period of baby teeth is of particular importance.

    The best predictive index in the field of tooth occlusion Permanent problems in the milk teeth period are the terminal position of the second milk molar teeth and the presence or absence of interdental spaces. (1) In children, the occlusion examination especially in the area of ??the milk molars requires skill and patience because in young children it is difficult to guide the jaw to the central occlusion state while maintaining the position of observing and evaluating the relationship of the molars with the help of a mirror for both the child and the examiner, while the examination of the canine relationships is much easier.

    Therefore, the purpose of this study is to find a relationship between canine and molar relationships in the period of milk teeth.

    General:

    Occlusion: in medical science, it has Latin roots meaning to block and close, and in dentistry, it means the overlapping of upper and lower teeth when closed or during chewing movements, or to Another definition of occlusion is the contact of the teeth with each other when the mouth is empty of food. (2)

    Central relationships: the relationship of the lower jaw to the upper jaw is when the condyle is in a stable anterior position along the articular ridge of the glenoid cavity and the articular disc is located between the condyle and the articular ridge.. (3)

    Central occlusion: It is a dental relationship and it is the relationship between the occlusal surfaces of the opposite teeth when there is maximum contact and interference between the cusps. (3)

    Normal occlusion: Ideal occlusion is a state that is desirable both in terms of appearance and physiology. (4) Even when the teeth in the jaw are completely regular, they do not guarantee a natural occlusion. (5)

    The criteria for an arbitrary occlusion in a 7-year-old child include the following:

    1. The relationship of class one Muller and Kanin

    2. 2 mm anterior and posterior overjet

    3. 2 mm anterior overbite

    4. Dental midline overlap and alignment. (6)

    Also, some situations may be normal for a certain age, if they are abnormal for another age:

    1. presence of crowding during the growth of incisors

    2. Ugly duckling

    3. The tendency of class two contact of the first permanent molars before the fall of the second milk molars

    4. Lingual inclination of the mandibular second molar during eruption before the tongue has a chance to influence the direction of eruption

    5. Existence of interdental spaces

    Dentist should be able to recognize these transitory stages and should not intervene in the normalization of the condition that will normalize by itself. (4)

    Occlusion during the period of milk teeth: the milk tooth bud is formed during the first six weeks of fetal life inside the womb, and about six months after birth, the growth of the first milk teeth begins. Usually, the growth of milk teeth is completed by the age of two and a half with the growth of the second milk molar. The occlusal stability of milk teeth is achieved at the age of 3 years with the completion of the growth of the second milk molars and remains stable until the growth of the first permanent molars at the age of 6 years. (6)

    From the age of 3-4, two major changes occur in the dental arch:

    1. Teeth wear (especially in front teeth)

    2. Reduction of overbite and overjet so that the occlusion may be tip to tip. (6)

    Characteristics of normal occlusion in the period of milk teeth:

    Anterior diastema

    Presence of primate spaces

    Little or no overbite

    Interincisal angle 150 Degree

    Relationship of Class I molars: Flush terminal or Mesial step

    Maxillary canine contact with mandibular canine and first upper and lower milk molars

    Smooth occlusal plan

    Oval shaped arch and transverse coordination of dental arches. (7)

    Occlusal relationships

    With the growth of the first molars, a three-dimensional occlusion relationship is formed. (8) Posterior milk teeth are in contact with each other in such a way that the mesiolingual cusp of the upper molars is in contact with the central fossae of the mandibular molars and the incisors are positioned with minimum overjet and overbite. (8)

    Abstract:

    Introduction and aim: Evaluation of occlusion in primary dentition is very important for recognizing and treating occlusal problems during the teeth development and although for an adulthood normal occlusion. According to the need of a high level of experience for molar region examination in spite of canine relationships examination is easier. If a relationship is found between canines and molars, canine examination can be considered as the first step of occlusion examination. The aim of this study is to determine if there is a relationship between canine and molar situation in centric occlusion.

  • Contents & References of Evaluation of the occlusal relationship of canine teeth with primary molars in three to five year old children of Mashhad city

    List:

     

     

    Abstract. 1

    Introduction and purpose. 1

    Materials and methods. 1

    Findings. 2

    Conclusion. 2

    Chapter one: Introduction and literature review

    Introduction. 4

    Generalities. 5

    1-1 Occlusion. 5

    2-1 Occlusion in primary teeth. 6

    3-1 Occlusal relations. 7

    Review of texts and articles. 11

    Statement of the problem and its necessity. 18.

    Aims and assumptions. 19

    Chapter two: Materials and methods.

    Materials and equipment used. 22

    Working method. 25

    Sampling method and the studied population. 26

    Criteria for inclusion and exclusion from the study. 26

    Exam reliability check. 27

    Data analysis method. 27

    Chapter three: Findings

    Findings. 29

    Chapter four: Discussion

    Discussion. 42

    Chapter five: Conclusion

    Conclusion. 49.

    Proposals. 50

    Resources. H. Study of occlusion in children 3-5 years old in pediatric department in dental faculty of Mashhad. [Doctorate Thesis]. Iran. Dental School of Mashhad University of Medical Science; 1376. (Persian)

    2- Behnaz H, Shafagh I. Evaluation, diagnosis and treatment of occlusal disease. Jahad Daneshgahi Faculty of Dentistry of Tehran 1369;1(1):11-13-16.(Persian)

    3-Ram fgord S, Ash M.Occlusion .3th ed.German: WB Sanders; 1988.P.166.

    4-Graber TM.Orthodontics-principles and practice.3th ed:WB sanders; 1992.p.180.

    5-Henderson D, McGivney G, Castleberry, D. McCracken's Removable partial prosthodontics. 3th ed.Albany: C V Msoby company; 1985.p.5.

         

    6- Mc Donald RE, Avery D.R. Dentistry for the child and adolescent. 8th ed. USA: C.V. Mosby Co;2004.p.167to139-667to670.

    7- Patti A, Perrier G. Clinical Success in Early Orthodontic Treatment. 1st ed. France: Quintessence international; 1990. P. 19.

    8- Damle S.G. Text book of pediatric dentistry. 2nd ed. New Delhi: Arya Publishing house; 2003.p.109-115-110-115-116.

    9- Pinkham JR, McTigue DJ, Casamassimo PS, Fields HW, McTigue DJ, Nowak AJ. Pediatric Dentistry Infancy Through Adolescence. 4th ed. China: Elsevier Saunders; 2005.p.301-302-303.

    10- Mohl N, Zarb G, Carlsson G, Rugh J. A text book of occlusion. 3rd ed. Chicago: Quintessence Publishing Co; 1988. P. 43, 15.

    11- Bishara SE. Textbook of Orthodontics. 1st ed. USA: W.B. Saunders Co; 2001. P.248.62.54.136.

          12-Nakata M, Wei S. Occlusal Guidance in pediatric dentistry. 1st ed. Brentwood, Missouri: Brian W. Cochran; 1988. P. 11, 10,12.

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    17- Biriya M, Eslamiamirabadi GR. Evaluation of occlusal situation in children 3-5 year-old of Tehran in pre-primary school in 1381. Journal of Dental School of Shahid Beheshti Medical Sciences 1381;21:661-670.(Persian)

    18-Baghaee B, Ajami B, Hafez B, Kalesah N, Sarraf Shirazi AR. Evaluation of the relationship between occlusion and temporomandibular disorder in six-year-old preschool children in Mashhad-Iran. Journal of Mash Dent Sch 1388;33(4):267-76.(Persian)

    19-Baume LJ. Physiological tooth migration and itsPhysiological tooth migration and its significance for the development of occlusion. 1, The biogenetic course of the deciduous dentition. Journal of Dental Research 1950; 29(1): 123-132.

    20-Clinch LM. An analysis of serial models between three and eight years of age. Transaction of British society for the study of orthodontics 1951; 7(1): 61-72.

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    22-Ravn JJ. Occlusion in the primary dentition in 3-year-old children. Scandinavian journal of dental research 1975;83(3):30-123. (Abstract)

    23- Ohno N, Kashima K, Sakai T. A study on interdental space of the deciduous dental arch in Indian sample. Aichi Gakuin Diagaku Shigakkai Shi 1990; 28(1): 79-91. (abstract)

    24-Farsi NM, Salama FS. Characteristics of primary dentition occlusion in a group of Saudi children 1996; 6(1): 253-59.(abstract)

    25-Yuen KK, So LL, Tang EL. Mesiodistal crown diameters of the primary and permanent teeth in southern Chinese-a longitudinal study. European journal of orthodontics 1997;19(6):31-721.

    26- Alexander S, Prabhu NT. Profiles, occlusal plane relationships and spacing of teeth in the dentitions of 3 to 4 year old children. The Journal of clinical pediatric dentistry 1998;22(4):329-34.(abstract)

    27- Liversidge HM, Molleson TI. Deciduous tooth size and morphogenetic fields in children from Christ Church, Spitalfields. Archives of oral biology. 1999;44(1):7 -130.

    28- Ferreira RI, Barreira AK, Soares CD, Alves AC. Prevalence of normal occlusion traits in deciduous dentition. Pesquisa odontologica brasileira = Brazilian oral research 2001;15(1):23-8. (abstract)

    29- Abualhaija ES, Qudeimat MA. Occlusion and tooth/arch dimensions in the primary dentition of preschool Jordanian children. JPD 2003; 13(1): 230-239.

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    33-Yilmaz Y, Gurbuz T, Simsek S, Dalmis A. Primary canine and molar relationships in centric occlusion in three to six year-old Turkish children: a cross-sectional study. The journal of contemporary dental practice 2006;7(3):59-66.(abstract)

    34- Onyeaso CO, Isiekwe MC. Occlusal changes from primary to mixed dentitions in Nigerian children. The Angle orthodontist 2008;78(1): 64-9.(abstract)

    35- Cândido IRF, de Figueiredo ACP, Cysne SS, Santiago BM, Valença AMG. Characteristics of primary tooth occlusion in 2-5-year-old children in Jo?o Pessoa, PB, Brazil. Journal of dentistry for children 2010;10(1):15-220.

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Evaluation of the occlusal relationship of canine teeth with primary molars in three to five year old children of Mashhad city
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