Abstract
Investigations were carried out on three types of occlusal contact used in tissue-supported dentures: (A) full balanced occlusion, (B) Lingualized occlusion of the type which maintains bilateral balance over a wide range, and (C) lingualized occlusion of the type which does not maintain bilateral balance over a wide range. Objective and quantitative comparisons were done on six factors: (1) jaw movements, (2) interposition of food, (3) food extrusion, (4) extent of antero-posterior guidance, (5) masticatory efficiency, and (6) electromyographs during mastication.
It was concluded that lingualized occlusion of the type which maintains bilateral balance over a wide range was superior for all of the factors. To further enhance this type of lingualized occlusion, investigations were carried out as to the ideal shape of the occlusal surface of the artificial teeth. This report discusses the eleven structural elements of the bladed teeth employing lingualized occlusion which we developed using knowledge obtained from these results. In addition, based on clinical results and evaluations, reports were made and the effectiveness was demonstrated on three clinical cases with different treatment methods where occlusal reconstruction was carried out using bladed teeth with lingualized occlusion.
