IJCRR - Vol 07 Issue 09, May, 2015
THREE DIMENSIONAL EVALUATION OF CONDYLAR HEAD INCLINATION WITH RESPECT TO RAMUS AMONG POST PUBERTAL CLASS II PATTERNS
Author: Abhilasha Goyal, R. H. Kamble, Sunita Shrivastav, Narendra Sharma
Objective: To assess the condylar head inclination with respect to ramus in Angle’s Class II division 1 and division 2 skeletal patterns using Digital Volume Tomography.
Material and method: The sample consisted of 45 post pubertal patients who were divided on the basis of clinical and cephalometric analysis into three groups - skeletal Class I, Class II division 1 and Class II division 2. The selected cases underwent Digital Volume Tomography and the images obtained were used to assess condylar head inclination, mediolateral and anteroposterior thickness of the condylar head on right and left sides for all the three groups. ANOVA, Least significance difference and Paired student’s t test were done.
Results: The Class II division 2 group showed significantly more anteriorly angulated condyles as compared to those of Class II division 1 and Class I groups on both right and left sides. Class II division 1 group showed significantly smaller mediolateral dimension as compared to Class I and Class II division 2 groups. The anteroposterior dimension was not significantly different in all three groups studied.
Conclusion: There exists a variation in the condylar morphology in the various skeletal malocclusions examined. The individuals with Class II division 2 malocclusion had a tendency towards having more anteriorly angulated condyles. Also the mediolateral dimension of condylar head of individuals with Class II division 1 malocclusion is smaller than Class II division 2 and Class I malocclusions.
Keywords: Condyle, Class II malocclusion, DVT
Abhilasha Goyal, R. H. Kamble, Sunita Shrivastav, Narendra Sharma. THREE DIMENSIONAL EVALUATION OF CONDYLAR HEAD INCLINATION WITH RESPECT TO RAMUS AMONG POST PUBERTAL CLASS II PATTERNS International Journal of Current Research and Review. Vol 07 Issue 09, May, 20-27
1. Gail Burke, Paul Major, Kenneth Glover and Narasimha Prasad. Correlations between condylar characteristics and facial morphology in Class II adolescent patients. Am J Ortho Dentofac Orthop. 1998; 114 (3): 328-336.
2. Ishibashi H, Takenoshita Y, Ishibashi K, Oka M. Age-related changes in the Human mandibular condyle: a morphologic, radiologic and histologic Study. J Oral Maxillofac Surg. 1995; 53(9):1016–23.
3. Yale SH, Allison BD, Hauptfuehrer JD. An epidemiological assessment of mandibular condyle morphology. Oral Surg Oral Med Oral Pathol. 1966; 21(2): 169–77. 4. Kurusu A, Horiuchi M, Soma K. Relationship between occlusal force and mandibular condyle morphology. Angle Orthod. 2009; 79(6):1063–9.
5. Arnett GW, Milam SB, Gottesman L. Progressive mandibular retrusion idiopathic condylar resorption-Part II .Am J Orthod Dentofacial Orthop. 1996; 110(2):117– 27.
6. M. Ozgar Say?n, Hakan Turkkahramana. Cephalometric Evaluation of Nongrowing Females with Skeletal and Dental Class II, division 1 Malocclusion. Angle Orthod. 2005; 75:656–660
.7. Hunter WS. The vertical dimensions of the face and skeletodental retrognathism. Am J Orthod. 1967; 53:586–595.
8. Bacon W, Eiller V, Hildwein M, Dubois G. The cranial base in subjects with dental and skeletal Class II. Eur J Orthod. 1992; 14:224–228.
9. Ishii N, Deguchi T, Hunt NP. Craniofacial morphology of Japanese girls with Class II division 1 malocclusion. J Orthod. 2001; 28:211–215.
10. Gianelly AA, Petras JC, Boffa J. Condylar position and Class II deep-bite, no-overjet malocclusions. Am J Orthod Dentofacial Orthop. 1989; 96:428-32.
11. Ricketts RM. Variations of the temporomandibular joint as revealed by cephalometric laminagraphy. Am J Orthod. 1950; 36: 877-98.
12. Ricketts RM. Tomographic research studies of the temporomandibular joint and occlusion. In: Provocations and perceptions in craniofacial orthopaedics. Dental science and facial art. Denver: Rocky Mountain Orthodontics; 1989. p. 901-46.
13. Elias G. Katsavrias. Morphology of the temporomandibular joint in subjects with Class II division 2 malocclusions. Am J Orthod Dentofac Orthop. 2006; 129:470-8.
14. Sug-Joon Ahn,Tae-Woo Kim, Dong-Yul Lee, and Dong-Seok Nahm. Evaluation of internal derangement of temporomandibular joint by panoramic radiographs compared with panoramic resonance imaging. Am J Orthod Dentofacial Orthop.2006; 129:479-85
15. Anuraag B. Choudhary , Mukta B. Motwani , Shirish S. Degwekar , Rahul R. Bhowate , Panjaj J. Banode , Abhilasha O. Yadav and Aarti Panchbhai. Utility of Digital Volume Tomography in Maxillofacial trauma. Journal of Oral and Maxillofacial Surgery. 2011 June; 69 (6):135-140.
16. Elias G. Katsavrias, Demetrios J. Halazonetis. Condyle and fossa shape in Class II and Class III skeletal patterns: A morphometric tomographic study. Am J Ortho Dentofac Orthop. 2005; 128:337-46.
17. Bjork A, Skieller V. Facial development and tooth eruption: An implant study at the age of puberty. Am J Orthod. 1972; 62:339-83.
18. Bjork A, Skieller V. Normal and abnormal growth of the mandible: A synthesis of longitudinal cephalometric implant studies over a period of 25 years. Eur J Orthod. 1983;5: 1-46,
19. Stockli PW, Willert HG. Tissue reactions in the temporomandibular joint resulting from anterior displacement of the mandible in the monkey. Am J Orthod .1971; 60:142- 55.
20. McNamara JA Jr. Neuromuscular and skeletal adaptations to altered function in the orofacial region. Am J Orthod .1973; 64:578-606?
21. McNamara JA Jr, Hinton RJ, Hoffman DL. Histologic analysis of temporomandibular joint adaptation to protrusive function in young adult rhesus monkeys (Macaca mulatta). Am J Orthod. 1982; 82:288-98.
22. McNamara JA Jr, Bryan FA. Long-term mandibular adaptations to protrusive function: an experimental study in Macaca mulatta. Am J Orthod. 1987; 92:98-108.
23. Zane Krisjane, Ilga Urtane, Gaida Krumina, Katrina Zepa. Three-dimensional evaluation of TMJ parameters in Class II and Class III patients. Stomatologija, Baltic Dental and Maxillofacial Journal. 2009, Vol. 11, No. 1.
24. Jeff Cohimia, Joydeep Ghosh, Pramod K. Sinha, Ram S. Nanda and G. Frans Currier. Tomographic assessment of temporomandibular joint in patient with malocclusion. Angle Orthod. 1996; 66(1): 27-36.
25. Robert Willer Farinazzo Vitral, Carlos de Souzza Telles. Computed tomographic evaluation of TMJ alteration in patients with Class II division 1 subdivision malocclusion: condylar symmetry. Am J Ortho Dentofac Orthop. 2002 April; 121: 396-375.
26. Andreia Fialho Rodrigues, Marcelo Reis Fraga and Robert Willer Farinazzo Vitral. Computed tomography evaluation of the temporomandibular joint in Class I malocclusion patients: Condylar symmetry and condyle-fossa relationship. Am J Orthod Dentofacial Orthop. 2009;136:192-8
27. Ben-Bassat Y, Yaffe A, Brin I, Freeman J, Ehrlich Y. Functional and morphological-occlusal aspects in children treated for unilateral posterior cross-bite. Eur J Orthod 1993; 15: 57-63.
28. Robert Willer Farinazzo Vitral, Marcio Jose da Silva Campos, Andreia Fialho Rodrigues and Marcelo Reis Fragac. Temporomandibular joint and normal occlusion: Is there anything singular about it? A computed tomographic evaluation. Am J Orthod Dentofacial Orthop. 2011; 140:18-24.