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65.悬空式(卫生桥)桥体的龈面有哪些要求? 要求悬空式桥体龈而呈圆突形,近似球面,或呈拱形,保持高度光滑;与牙嵴的距离愈大愈好,以便于食物的流通。 66.桥体的外形、色泽有哪些要求? (1)正确恢复桥体的唇、颊侧和舌、腭侧的外形突度;在不影响美观的前提下,尽量扩大桥体的邻间隙,使之有利于自洁作用和龈组织的健康。 (2)前桥桥体的大小、形态、排列位置及唇侧牙颈绿应与同名牙对称,与邻牙协调;颜色与口内天
65. vacant (hygienic bridge) gingival pontic What are the requirements? Requires open bridge gingival pontic-shaped, spherical or arched, maintaining a high degree of smoothness; and the greater the distance from the crest , In order to facilitate the circulation of food. 66. Bridge shape, color what are the requirements? (1) the correct restoration of pontic lip, buccal and tongue, palatal contour shape; under the premise of not affecting the appearance, try to expand the adjacent gap pontic, Make it conducive to self-cleaning and gingival tissue health. (2) The size, shape, arrangement of the anterior bridge and the position of the labial gingival neck should be symmetrical with the same name and coordinate with the adjacent teeth. The color and inner mouth day