Comparison of Changes in Intraoral Dynamic Space (Donders Space) with Myofunctional Therapy in Skeletal Class II Division 1 Malocclusion: An In Vivo Study
Citation Information :
Kamble RH, Alam F, Nambiar K, Kumari S, Suchak D, Toshniwal N. Comparison of Changes in Intraoral Dynamic Space (Donders Space) with Myofunctional Therapy in Skeletal Class II Division 1 Malocclusion: An In Vivo Study. J Contemp Dent Pract 2023; 24 (8):582-586.
Aim: To evaluate the changes in the intraoral dynamic space with myofunctional therapy in skeletal class II division 1 malocclusion using three-dimensional digital volume tomography (3D-DVT).
Materials and methods: The study type is observational and the duration of intervention was 3 years. Dental casts obtained from 20 samples of 11–14 years age-group were collected and 3D-DVT scans were performed prior to and after the myofunctional therapy. The parameters depicting the arch perimeter, arch width, arch length, arch shape, and arch volume on dental cast were used in the study using several linear and volumetric measurements. All parameters were compared before and after myofunctional therapy using t-test.
Results: The Intraoral volume before myofunctional therapy (T0) was 5.59 mL and after myofunctional therapy (T1), it was 7.22 mL. Significant changes were seen in intraoral volume, arch perimeter, arch length, and intercanine and intermolar arch width and the arch shape. Linear and volumetric measurements were increased after myofunctional therapy.
Conclusion: Myofunctional appliances lead to an expansion in the anteroposterior and sagittal direction thus increasing the Donders space and leading to proper formation of dental arches and proper positioning of the teeth.
Clinical significance: Myofunctional therapy is an effective method of increasing arch width, length, and volume. This therapy can be used in routine practices in young children with constricted arch and improvement in facial esthetic.
Balter W. The Master of Functional Appliance. Quintessence Publishing Company Incorporated. Simultanea Snc, Milan, Italy, 2003. pp. 278–298.
Perkins RE, Blanton PL, Biggs NL. Electromyographic analysis of the “buccinator mechanism” in human beings. J Dent Res 1977;56(7):783–794. DOI: 10.1177/00220345770560071301.
Angle EH. Treatment of Malocclusion of the Teeth. 7th edition. Philadelphia: SS White Dental Manufacturing Company, 1907.
Lundström AF. Malocclusion of the Teeth Regarded as a Problem in Connection With the Apical Base. Svensk Tandl Tidskr Festband 1925;11(8): 724–731. DOI: https://doi.org/10.1016/S0099-6963(25)90386-9.
Werner SP, Shivapuja PK, Harris EF. Skeletodental changes in the adolescent accruing from use of the lip bumper. Angle Orthod 1994;64(1):13–22. DOI: 10.1043/0003-3219(1994)064<0013:SCITAA>2.0.CO;2.
Grossen J, Ingervall B. The effect of a lip bumper on lower dental arch dimensions and tooth positions. Eur J Orthod 1995;17(2):129–134. DOI: 10.1093/ejo/17.2.129.
McWade RA, Mamandras AH, Hunter WS. The effects of Fränkel II treatment on arch width and arch perimeter. Am J Orthod Dentofacial Orthop 1987;92(4):313–320. DOI: 10.1016/0889-5406(87)90332-5.
Fränkel R. A functional approach to orofacial orthopaedics. Br J Orthod 1980;7(1):41–51. DOI: 10.1179/bjo.7.1.41.
Nevant CT, Buschang PH, Alexander RG, et al. Lip bumper therapy for gaining arch length. Am J Orthod Dentofacial Orthop 1991;100(4):330–336. DOI: 10.1016/0889-5406(91)70070-D.
Hime DL, Owen III AH. The stability of the arch-expansion effects of Fränkel appliance therapy. Am J Orthod Dentofacial Orthop. 1990;98(5):437–445. DOI: 10.1016/S0889-5406(05)81653-1.
Moss ML, Salentijn L. The primary role of functional matrices in facial growth. Am J Orthod 1969;55(6):566–577. DOI: 10.1016/0002-9416(69)90034-7.
Fränkel R. Decrowding during eruption under the screening influence of vestibular shields. Am J Orthod 1974;65(4):372–406. DOI: 10.1016/0002-9416(74)90271-1.
Owen III AH. Morphologic changes in the sagittal dimension using the Fränkel appliance. Am J Orthod 1981;80(6):573–603. DOI: 10.1016/0002-9416(81)90263-3.
Hamilton SD, Sinclair PM, Hamilton RH. A cephalometric, tomographic, and dental cast evaluation of Fränkel therapy. Am J Orthod Dentofacial Orthop 1987;92(5):427–436. DOI: 10.1016/0889-5406(87)90264-2.
Vargervik K. Morphologic evidence of muscle influence on dental arch width. Am J Orthod 1979;76(1):21–28. DOI: 10.1016/0002-9416(79)90296-3.