sir please explain??? Angle of cervical convergence on two teeth presenting dissimilar contours. A greater angle of cervical convergence on tooth A necessitates placement of a clasp terminus, x, nearer the height of contour than when a lesser angle exists
The depth of undercut on tooth A will be more thwrefore retentive terminal should be place nesrer height of contour because it will fulfill its purpose of providing retention from dislodging forces and at same time will also provide passive fit else if deeply placed it will apply lateral stress on tooth.
Ring clasp is used in mesiolingually tilted molar. Reason being that with other clasp it is not possible to approach proximal undercut. Because of tilt you will get undercut only in the infrabulge area of mesiolingual surface.
Direct retainers are part of the framework which are rigid except the terminal third. They are connected in waxup stage and casted as other components.
Please sir, could you explain when reverse Aker clasp is contraindicated🤔 You have said that when bar clasp is contraindicated, we use reverse Aker clasp and if reverse Aker one is not to be used , we use fish hook one
Reverse circlet clasp is contraindicated in esthetic area and when occlusal clearance is less. Yes first choice is bar clasp if it cannot be given then reverse circlet is given. Fishhook is only given when both cannot be given
