Analysis of masticatory cycle efficiency in complete denture wearers.

PURPOSE This study assessed masticatory efficiency and duration of the masticatory cycle in 14 asymptomatic patients with severe bone resorption. All patients had worn complete dentures for over 10 years. Recall visits were scheduled at 5 months and 1 year after receiving new dentures. MATERIALS AND METHODS Fourteen patients were evaluated in this study. The Research Diagnostic Criteria questionnaire and tests of the efficiency and duration of the masticatory cycle were performed with artificial food before, 5 months after, and 1 year after new dentures were delivered. Masticatory efficiency was assessed using a sieve system; artificial food was ground for 35 masticatory cycles and monitored by the operator. RESULTS Masticatory efficiency at 5 months was significantly improved for the 0.42-mm mesh. An improvement in masticatory efficiency and a reduction in mastication time were observed with the new dentures after 1 year. CONCLUSION The results of this study indicated that 5 months did not allow enough time to demonstrate improved muscular capacity and ability after receiving new dentures. After 1 year, the duration of the masticatory cycle was reduced, and masticatory efficiency was significantly improved.

[1]  R. Wilding,et al.  The association between chewing efficiency and occlusal contact area in man. , 1993, Archives of oral biology.

[2]  A Mishellany,et al.  The regulation of masticatory function and food bolus formation. , 2006, Journal of oral rehabilitation.

[3]  Y. Shikano.  [Clinical study of evaluation on masticatory function in complete denture wearers. A comparison of masticatory movements between normal natural dentition and complete denture wearers]. , 1990, Nihon Hotetsu Shika Gakkai zasshi.

[4]  H. Chauncey,et al.  Masticatory performance and food acceptability in persons with removable partial dentures, full dentures and intact natural dentition. , 1984, Journal of gerontology.

[5]  N. Brill.  Reflexes, registrations, and prosthetic therapy , 1957 .

[6]  A. van der Bilt,et al.  Modulation of the Mandibular Stretch Reflex Sensitivity During Various Phases of Rhythmic Open-Close Movements in Humans , 1997, Journal of dental research.

[7]  M. A. van 't Hof,et al.  Masticatory performance and chewing experience with implant-retained mandibular overdentures. , 1999, Journal of oral rehabilitation.

[8]  R. Miralles,et al.  Influence of balanced occlusion and canine guidance on electromyographic activity of elevator muscles in complete denture wearers. , 1989, The Journal of prosthetic dentistry.

[9]  D. Farina,et al.  Surface EMG of jaw-elevator muscles and chewing pattern in complete denture wearers. , 2005, Journal of oral rehabilitation.

[10]  J. P. Lund,et al.  Influence of age on adaptability of human mastication. , 2004, Journal of Neurophysiology.

[11]  A. van der Bilt,et al.  Human jaw-elevator muscle activity and food comminution in the dentate and edentulous state. , 1993, Archives of oral biology.

[12]  A P Slagter,et al.  Force-deformation properties of artificial and natural foods for testing chewing efficiency. , 1992, The Journal of prosthetic dentistry.

[13]  M. Bakke,et al.  Unilateral, isometric bite force in 8-68-year-old women and men related to occlusal factors. , 1990, Scandinavian journal of dental research.

[14]  P H Buschang,et al.  Normal masticatory performance in young adults and children. , 1996, Archives of oral biology.

[15]  C. Gibbs,et al.  Biting strength and chewing forces in complete denture wearers. , 1990, The Journal of prosthetic dentistry.

[16]  M. Goiato,et al.  Electromyographic Activity of the Mandible Muscles at the Beginning and End of Masticatory Cycles in Patients with Complete Dentures , 2008, Gerontology.

[17]  J. Rugh,et al.  Dietary intake in edentulous subjects with good and poor quality complete dentures. , 2002, The Journal of prosthetic dentistry.

[18]  B. Bergman,et al.  Masticatory efficiency of complete denture patients. A clinical examination of potential changes at the transition from old to new denture. , 1982, Acta odontologica Scandinavica.

[19]  D. A. Luke,et al.  Methods for analysing the breakdown of food in human mastication. , 1983, Archives of oral biology.

[20]  M. B. Gavião,et al.  Masticatory performance and bite force in children with primary dentition. , 2007, Brazilian oral research.

[21]  H. Gunne,et al.  The effect of new complete dentures on mastication and dietary intake. , 1985, Acta odontologica Scandinavica.

[22]  F. Bosman,et al.  Comparison of force-deformation characteristics of artificial and several natural foods for chewing experiments , 1986 .

[23]  T. Rudy,et al.  A comparison of the effect of different occlusal forms in mandibular implant overdentures. , 1998, The Journal of prosthetic dentistry.

[24]  R. Manly,et al.  Clinical comparison of masticatory performance and electromyographic activity of patients with complete dentures, overdentures, and natural teeth. , 1978, The Journal of prosthetic dentistry.

[25]  A. van der Bilt,et al.  Biting and Chewing in Overdentures, Full Dentures, and Natural Dentitions , 2000, Journal of dental research.

[26]  L. V. Christensen,et al.  Bilateral masseteric contractile activity in unilateral gum chewing: differential calculus. , 2008, Journal of oral rehabilitation.

[27]  H. Karkazis,et al.  Surface EMG activity of the masseter muscle in denture wearers during chewing of hard and soft food. , 1998, Journal of oral rehabilitation.

[28]  R. Dunford,et al.  Skeletal osteopenia and residual ridge resorption. , 1989, The Journal of prosthetic dentistry.

[29]  S. Dworkin,et al.  Research diagnostic criteria for temporomandibular disorders: review, criteria, examinations and specifications, critique. , 1992, Journal of craniomandibular disorders : facial & oral pain.

[30]  M. B. Gavião,et al.  Masticatory efficiency in children with primary dentition. , 2001, Pediatric dentistry.

[31]  Reestablishing occlusal vertical dimension using a diagnostic treatment prosthesis in the edentulous patient: a clinical report. , 2003 .

[32]  M. Goiato,et al.  Electromyographic evaluation of masseter and anterior temporalis muscles in resting position and during maximum tooth clenching of edentulous patients before and after new complete dentures. , 2007, Acta odontologica latinoamericana : AOL.