. The Dental cosmos. meatus to the insertionof the ala of the nose (see Fig. 1. b)>viz. the auriculo-naso-labial line. If, in an adult, the occlusal plane isprolonged backward, while the jaws are compensation plane, instead of com-pensation curve and Spees curve—which neither correspond in any way toan anatomical reality nor do they findany application in prosthesis; while theplanes which I propose considerably sim-plify and facilitate the understandingof the problem of articulation in artificialteeth. Fig. a, Occlusal plane of the upper dental arch, c, Compensation plane of the sec-ond
. The Dental cosmos. meatus to the insertionof the ala of the nose (see Fig. 1. b)>viz. the auriculo-naso-labial line. If, in an adult, the occlusal plane isprolonged backward, while the jaws are compensation plane, instead of com-pensation curve and Spees curve—which neither correspond in any way toan anatomical reality nor do they findany application in prosthesis; while theplanes which I propose considerably sim-plify and facilitate the understandingof the problem of articulation in artificialteeth. Fig. a, Occlusal plane of the upper dental arch, c, Compensation plane of the sec-ond and third molars. B, Auriculo-naso-labial line, parallel to the occlusalplane. in occlusion, this plane (a) passes on alevel with the distal surface of the neckof the lower third molar. Upon the eruption of the second andthird molars another plane is formed ata mean acute angle of from 15 to 20degrees with the occlusal plane. Thisis the compensation plane, and the anglethus formed constitutes the compensa-tion angle. This plane, if projectedforward, passes by the labial surface ofthe neck of the lower incisor. (SeeFig. 1, c.) THE COMPENSATION PLANE. I propose to call the anterior plane theocclusal plane, and the posterior one the The angle formed between the com-pensation plane and the occlusal planestands in direct relation with the inclina-tion of the condyle path. With Gysi,1 have found that a condyle path of 40degrees corresponds, on an average, witha compensation an<rle of half that size,that is t
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Keywords: ., bookcentury1900, bookdecade1910, bookiddent, booksubjectdentistry
