Quantitative evaluation of the shape and the elasticity of repaired cleft lip.

Tight lip in repaired cleft lip patients with or without cleft palate (CL[P]) has been discussed as one of the causal factors of maxillary growth retardation and malocclusion. The purpose of this study was to evaluate the shape and the elasticity of repaired cleft lip quantitatively. Forty-one Japanese CL(P) patients were examined. Fifty-four noncleft patients under orthodontic treatment were used as a control group. An apparatus to stretch the anguli oris bilaterally was devised and the extensibility of the lip was measured to evaluate lip elasticity. Standardized photos of the lips were taken to examine lip shape. CL(P) patients showed poor elasticity of the lip. This trend was more apparent in bilateral CL(P) patients than in unilateral CL(P) patients. The upper lip of CL(P) patients was significantly shorter in vertical height. These results clearly demonstrated the tightness and shortness of the repaired lip in CL(P) patients.

[1]  T. Togawa,et al.  Perioral force measurement by a radiotelemetry device. , 1989, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[2]  A. Mamandras.  Linear changes of the maxillary and mandibular lips. , 1988, American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics.

[3]  B. Ingervall,et al.  Application in children of a new method for the measurement of forces from the lips on the teeth. , 1985, European journal of orthodontics.

[4]  W R Proffit,et al.  Equilibrium theory revisited: factors influencing position of the teeth. , 2009, The Angle orthodontist.

[5]  W. K. Lindsay,et al.  MORPHOLOGY OF THE ADULT FACE FOLLOWING REPAIR OF UNILATERAL CLEFT LIP AND PALATE IN CHILDHOOD , 1973, Plastic and reconstructive surgery.

[6]  D. C. Picton,et al.  A study of pressures exerted by the lips and cheeks on the teeth of subjects with angle's class II division 1, clss II division 2 and class 3 malocclusions compared with those of subjects with normal occlusions. , 1968, Archives of oral biology.