Head & Face Medicine | |
Lip closing force of Class III patients with mandibular prognathism: a case control study | |
Fengshan Chen1  Ying Cai1  Sihui Chen1  | |
[1] Department of Orthodontics, Laboratory of Oral Biomedical Science and Translational Medicine, School of Stomatology, Tongji University, Middle Yanchang Road 399, Shanghai, P. R. China | |
关键词: Perioral force; Class III; Mandibular prognathism; Lip closing force; | |
Others : 1145508 DOI : 10.1186/1746-160X-10-33 |
|
received in 2014-03-16, accepted in 2014-08-22, 发布年份 2014 | |
【 摘 要 】
Introduction
To compare the lip closing force of patients with mandibular prognathism to that of patients without dentofacial anomalies.
Methods
The subject group included 62 female patients of Class III relationship with mandibular prognathism. The control group been comprised of 71 patients of Class I relationships without skeletal deformities. Maximum lip closing force and average lip closing force were measured using a Y-meter. Student’s t-test was carried out to analyse the differences between the groups. Correlation and stepwise multiple linear regression analyses were performed to analyse the relationship between lip closing force and craniofacial morphology.
Results
The lower lip closing force of subjects with mandibular prognathism was significantly greater than that of patients in the control group (P < 0.001), while the upper lip closing force showed no difference (P > 0.05). The lower lip closing force of patients with mandibular prognathism was strongly correlated with IMPA (Lower Incisor - Mandibular Plane angle, P < 0.001) and FMA (Frankfort Plane-Mandibular Plane angle, P < 0.001). Multiple regression equations: (MaxLL) = 12.192 - 0.125 * (IMPA) + 0.082 (FMA); (AveLL) = 9.112 - 0.091 * (IMPA) + 0.054 (FMA).
Conclusions
The lower lip closing force was markedly increased in Class III patients with mandibular prognathism and was strongly correlated with lower incisor position and mandibular plane angle.
【 授权许可】
2014 Chen et al.; licensee BioMed Central Ltd.
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
20150402095019182.pdf | 757KB | download | |
Figure 5. | 58KB | Image | download |
Figure 4. | 59KB | Image | download |
Figure 3. | 37KB | Image | download |
Figure 2. | 84KB | Image | download |
Figure 1. | 79KB | Image | download |
【 图 表 】
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
【 参考文献 】
- [1]Kitai N, Takada K, Yasuda Y: School health database and its application [in Japanese]. J Kin-To Orthod Soc 1989, 24:33-38.
- [2]Johnson JS, Soetamat A, Winoto NS: A comparison of some features of the Indonesian occlusion with those of two other ethnic groups. Br J Orthod 1978, 5:183-188.
- [3]Susami R: A cephalometric study of dentofacial growth in Class III subjects with anterior crossbite [In Japanese]. J Jpn Orthod Soc 1967, 26:1-34.
- [4]Mackay F, Jones JA, Thompson R, Simpson W: Craniofacial form in Class III cases. Br J Orthod 1992, 19:15-20.
- [5]Graber LW: Chin cup therapy for mandibular prognathism. Am J Orthod 1977, 72:23-41.
- [6]Capelozza Filho L, Martins A, Mazzotini R, da Silva Filho OG: Effects of dental decompensation on the surgical treatment of mandibular prognathism. Int J Adult Orthod 1996, 11:165-180.
- [7]Singh GD: Morphologic determinants in the Etiology of class III Malocclusions: a review. Clin Anat 1999, 12:382-405.
- [8]Seren E: EMG investigation on mentalis, masseter and OOS muscles of adults with Class III malocclusion. Turk Ortodonti Derg 1990, 3:85-93.
- [9]Jung MH, Yang WS, Nahm DS: Maximum closing force of mentolabial muscles and type of malocclusion. Angle Orthod 2010, 80:72-79.
- [10]Jung MH, Yang WS, Nahm DS: Effects of upper lip closing force on craniofacial structures. Am J Orthod Dentofacial Orthop 2003, 123:58-63.
- [11]Proffit WR: Equilibrium theory revisited: factors influencing position of the teeth. Angle Orthod 1978, 48:175-186.
- [12]Lear CS, Deco RE, Ng DH: Threshold levels for displacement of human maxillary central incisors in response to lingual directed forces. J Dent Res 1974, 53:942.
- [13]Proffit WR: Muscle pressures and tooth position: North American Whites and Australian aborigines. Angle Orthod 1975, 45:1-11.
- [14]Posen AL: The influence of maximum perioral and tongue force on the incisor teeth. Angle Orthod 1972, 42:285-309.
- [15]Thüer U, Ingervall B: Pressure from the lips on the teeth and malocclusion. Am J Orthod Dentofacial Orthop 1986, 90:234-242.
- [16]Ueki K, Mukozawa A, Okabe K, Miyazaki M, Moroi A, Marukawa K, Nakagawa K: Changes in the lip closing force of patients with Class III malocclusion before and after orthognathic surgery. Int J Oral Maxillofac Surg 2012, 41:835-838.
- [17]Dahlberg G: Statistical Methods for Medical and Biological Students. New York: Interscience Publications; 1940.
- [18]Ellis E 3rd, McNamara JA Jr: Components of adult class III malocclusion. J Oral Maxillofac Surg 1984, 42:295-305.
- [19]Ruan WH, Chen MD, Gu ZY, Lu Y, Su JM, Guo Q: Muscular forces exerted on the normal deciduous dentition. Angle Orthod 2005, 75:785-790.
- [20]Bardach J, Kelly JM, Salyer KE: The effects of lip repair with and without soft-tissue undermining and delayed palate repair on maxillary growth: an experimental study in beagles. Plast Reconstr Surg 1994, 94:343-351.
- [21]Thüer U, Jason T, Ingervall B: Application in children of a new method for the measurement of forces from the lips on the teeth. Eur J Orthod 1985, 7:63-78.
- [22]Kato Y, Kuroda T, Togawa T: Perioral force measurement by a radiotelemetry device. Am J Orthod Dentofacial Orthop 1989, 95:410-414.
- [23]Bundgaard M, Bjerregard J, Melsen B, Terp S: An electro-myographic study of the effect of the mandibular lip bumper. Eur J Orthod 1983, 5:149-156.
- [24]Ruan WH, Ye XW, Su JM: Pressure from the lips and the tongue in children with Class III malocclusion. J Zhejiang Univ Sci B 2007, 8:296-301.
- [25]Weinstein S, Haack DC, Morris LY: On an equilibrium theory of tooth position. Angle Orthod 1963, 35:1-25.
- [26]Chang HP, Tseng YC, Chang HF: Treatment of Mandibular Prognathism. J Formos Med Assoc 2006, 105:781-790.
- [27]Jeong J, Li X, McEvilly RJ, Rosenfeld MG, Lufkin T, John LR: Rubenstein: Dlx genes pattern mammalian jaw primordium by regulating both lower jaw-specific and upper jaw-specific genetic programs. Development 2008, 135:2905-2916.
- [28]Balic A, Adams D, Mina M: Prx1 and Prx2 cooperatively regulate the morphogenesis of the medial region of the mandibular process. Dev Dyn 2009, 238(10):2599-2613.
- [29]Tomes CS: The bearing of the development of the jaws on irregularities. Dental Cosmos 1873, 15:292-296.
- [30]Ingervall B, Janson T: The value of clinical lip strength measurements. Am J Orthod 1981, 80:496-507.
- [31]Proffit WR, Fields HW: Occlusal forces in normal and long-face children. J Dent Res 1983, 62:571-574.