1 00:00:00,000 --> 00:00:11,766 2 00:00:11,766 --> 00:00:18,599 This Quick Guide tutorial from exocad shows how to design a reduced crown with a milled brace support 3 00:00:18,600 --> 00:00:25,200 by using the telescopic crown restoration type and the "Shrink Telescope's Anatomy" feature. 4 00:00:25,200 --> 00:00:26,500 5 00:00:26,500 --> 00:00:32,433 To save time, the tooth placement and the anatomical design have already been done. 6 00:00:32,433 --> 00:00:33,833 7 00:00:33,833 --> 00:00:38,033 We proceed to the telescope's insertion axis step. 8 00:00:38,033 --> 00:00:41,566 9 00:00:41,566 --> 00:00:44,632 Define the telescope's insertion axis. 10 00:00:44,633 --> 00:00:45,966 11 00:00:45,966 --> 00:00:50,732 I already saved a custom view with the desired insertion axis. 12 00:00:50,733 --> 00:00:51,433 13 00:00:51,433 --> 00:01:01,366 This insertion axis will not only be used for the milled lingual, but also for any attachment that might possibly be attached to the construction. 14 00:01:01,366 --> 00:01:02,032 15 00:01:02,033 --> 00:01:04,066 Let's proceed to the next step, 16 00:01:04,066 --> 00:01:08,399 which will be the design of the milled brace support. 17 00:01:08,400 --> 00:01:10,200 18 00:01:10,200 --> 00:01:15,200 The telescope parameters will be explained in a separate tutorial. 19 00:01:15,200 --> 00:01:16,800 20 00:01:16,800 --> 00:01:25,033 Now I will demonstrate how a milled lingual can be designed very quickly with the telescopic crown restoration type. 21 00:01:25,033 --> 00:01:26,133 22 00:01:26,133 --> 00:01:31,533 I usually start with the lower border by adjusting the points on the lower curve. 23 00:01:31,533 --> 00:01:32,399 24 00:01:32,400 --> 00:01:38,366 Tip: With Shift you can move a whole region limited by three points. 25 00:01:38,366 --> 00:01:40,566 26 00:01:40,566 --> 00:01:43,366 Or move each point individually. 27 00:01:43,366 --> 00:01:48,666 28 00:01:48,666 --> 00:01:52,699 You may use the semitransparent anatomical crown 29 00:01:52,700 --> 00:01:59,066 to define the border thickness in the region of the milled lingual according to visual judgement. 30 00:01:59,066 --> 00:02:03,632 31 00:02:03,633 --> 00:02:10,499 Or use the dot below the control point to stick the border's point to the anatomical shape. 32 00:02:10,500 --> 00:02:11,366 33 00:02:11,366 --> 00:02:18,432 I prefer to do it for these cases manually, and to make the borders slightly bigger than the crown in this region, 34 00:02:18,433 --> 00:02:24,333 as the anatomical tooth will be bigger in the upper region of the crown. 35 00:02:24,333 --> 00:02:24,799 36 00:02:24,800 --> 00:02:29,633 When the border is done, proceed with adjusting the friction area. 37 00:02:29,633 --> 00:02:30,599 38 00:02:30,600 --> 00:02:37,566 Start with using Ctrl to move all points simultaneously inwards on the middle curve 39 00:02:37,566 --> 00:02:42,832 in order to ensure the friction surface is as thin as possible. 40 00:02:42,833 --> 00:02:45,399 41 00:02:45,400 --> 00:02:54,266 Now add another point with Ctrl in the mesial region to prepare the design for a beading where you want to stop the porcelain. 42 00:02:54,266 --> 00:02:56,866 43 00:02:56,866 --> 00:02:59,532 Do the same in the distal area. 44 00:02:59,533 --> 00:03:01,566 45 00:03:01,566 --> 00:03:09,766 Now move all points in the buccal area of the lower curve towards the margin to eliminate any additional border in this zone. 46 00:03:09,766 --> 00:03:14,766 47 00:03:14,766 --> 00:03:23,799 Now use again the semitransparent anatomical crown to adjust the thickness of the crown in the the ceramic beading areas. 48 00:03:23,800 --> 00:03:30,133 49 00:03:30,133 --> 00:03:38,466 If required, add a third control point to create a flat area in the zone where you would like to add attachments later. 50 00:03:38,466 --> 00:03:49,032 51 00:03:49,033 --> 00:03:51,866 Repeat this step on the distal side. 52 00:03:51,866 --> 00:03:59,166 53 00:03:59,166 --> 00:04:07,299 If you want to place a milled channel later, add enough material in the region where you'd like to place it. 54 00:04:07,300 --> 00:04:08,033 55 00:04:08,033 --> 00:04:13,399 Most technicians like to design a chamfer on the occlusal beading of the ceramic 56 00:04:13,400 --> 00:04:19,733 to pave the way for a smooth transition between the partial's metallic brace and the ceramic. 57 00:04:19,733 --> 00:04:22,933 This can be achieved with the upper curve. 58 00:04:22,933 --> 00:04:30,366 Move all points with Ctrl to move and place the upper curve with a constant distance to the friction area. 59 00:04:30,366 --> 00:04:36,732 Or use Shift to place the beading individually by using the transparent anatomical mesh. 60 00:04:36,733 --> 00:04:47,299 Now click on the UFO (cone) icons between the upper and middle curve to change the state for this segment from conical to friction surface. 61 00:04:47,300 --> 00:04:54,533 That creates a second friction surface which has the same chamfer as set in the main friction surface. 62 00:04:54,533 --> 00:04:54,933 63 00:04:54,933 --> 00:04:58,966 Now we proceed with the most important step in this tutorial: 64 00:04:58,966 --> 00:05:04,399 the definition of the anatomical zone which shall then be reduced. 65 00:05:04,400 --> 00:05:14,166 To do this, we click again on the UFO icons in the occlusal area and change the state of these segments to anatomic shape. 66 00:05:14,166 --> 00:05:17,966 67 00:05:17,966 --> 00:05:25,132 Now it's the right time to do some fine-tweaking for the distances of the chamfer on the ceramic beading area. 68 00:05:25,133 --> 00:05:33,499 69 00:05:33,500 --> 00:05:39,800 Furthermore we also have to define the anatomical zones to be reduced in the buccal area. 70 00:05:39,800 --> 00:05:47,900 To do that, we click on the hat icons, this time in the buccal area, to change this segment's state to anatomic shape. 71 00:05:47,900 --> 00:05:49,466 72 00:05:49,466 --> 00:05:58,466 In the second friction area, you have to click twice on the UFO icon to switch the segment's state to anatomic shape. 73 00:05:58,466 --> 00:06:00,032 74 00:06:00,033 --> 00:06:07,766 You can find more information about the usage of the UFO/hat/tooth icons in the exocad wiki. 75 00:06:07,766 --> 00:06:11,799 76 00:06:11,800 --> 00:06:19,233 You can extend the chamfered zone in the area where you possibly want to place a milled channel at a later stage, 77 00:06:19,233 --> 00:06:23,133 78 00:06:23,133 --> 00:06:28,566 and do some adjustments in the transition zone between metal and porcelain. 79 00:06:28,566 --> 00:06:49,699 80 00:06:49,700 --> 00:06:52,833 Now proceed to the free-forming step. 81 00:06:52,833 --> 00:06:59,499 The first free-forming step has the advantage that the friction surface segments stay untouchable. 82 00:06:59,500 --> 00:07:09,066 That allows you to add some material on the anatomic segments to improve the transition zone between metal and porcelain. 83 00:07:09,066 --> 00:07:16,932 84 00:07:16,933 --> 00:07:22,266 But don't be too critical as these regions will be reduced at a later stage. 85 00:07:22,266 --> 00:07:30,166 86 00:07:30,166 --> 00:07:38,599 That's how the finished crown will look like later with porcelain, but now we want to reduce the anatomical area. 87 00:07:38,600 --> 00:07:42,166 To do that, we switch to the Expert mode 88 00:07:42,166 --> 00:07:43,099 89 00:07:43,100 --> 00:07:49,933 and click on the "Shrink Telescope's Anatomy" button in the expert frame on the bottom of the screen. 90 00:07:49,933 --> 00:07:51,633 91 00:07:51,633 --> 00:08:01,366 The telescopic segments friction surface and conical shape will be automatically marked in blue and will thus be excluded from shrinking. 92 00:08:01,366 --> 00:08:04,666 Only the anatomical segments will be shrunk. 93 00:08:04,666 --> 00:08:04,932 94 00:08:04,933 --> 00:08:09,099 Certainly you can adjust the blue area manually with a brush, 95 00:08:09,100 --> 00:08:12,666 or delete blue parts while holding on Shift. 96 00:08:12,666 --> 00:08:12,699 97 00:08:12,700 --> 00:08:18,233 Use the slider or Ctrl and the mouse wheel to adjust the brush thickness. 98 00:08:18,233 --> 00:08:18,399 99 00:08:18,400 --> 00:08:24,966 The blue friction area cannot be deleted as long as "Hold friction parts" is checked. 100 00:08:24,966 --> 00:08:25,266 101 00:08:25,266 --> 00:08:31,232 If this feature is unchecked, you can even delete the blue area on the friction surface segments. 102 00:08:31,233 --> 00:08:36,233 If checked again, these parts will automatically be marked in blue again. 103 00:08:36,233 --> 00:08:36,266 104 00:08:36,266 --> 00:08:42,332 As for reduced crowns, you can now set the desired depth of shrinking. 105 00:08:42,333 --> 00:08:51,733 You will find more information about the other shrinking parameters in a separate basic features tutorial called "Anatomic Coping with Cutback". 106 00:08:51,733 --> 00:08:52,633 107 00:08:52,633 --> 00:08:56,333 Now click the "Apply" button to start shrinking. 108 00:08:56,333 --> 00:09:02,299 109 00:09:02,300 --> 00:09:04,666 And here is the result. 110 00:09:04,666 --> 00:09:09,432 111 00:09:09,433 --> 00:09:14,699 Click "OK" to close this dialog and you can proceed in the wizard. 112 00:09:14,700 --> 00:09:18,466 113 00:09:18,466 --> 00:09:24,832 The wizard will restart with the second free-forming step on the reduced restoration. 114 00:09:24,833 --> 00:09:32,333 Still, free-forming on the friction segments is not possible yet. These zones stay untouchable. 115 00:09:32,333 --> 00:09:40,633 116 00:09:40,633 --> 00:09:46,699 You may benefit from this advantage to add or remove material in the beading zone. 117 00:09:46,700 --> 00:09:51,133 118 00:09:51,133 --> 00:09:56,533 If you want to do some free-forming or smoothing on the friction surface segments, 119 00:09:56,533 --> 00:10:03,666 you can do that in the last "Free-form restorations" step once you've reached the end of the wizard. 120 00:10:03,666 --> 00:10:20,432 121 00:10:20,433 --> 00:10:28,833 Now you can for example smooth the borders which were created between friction surface segments and the reduced part 122 00:10:28,833 --> 00:10:33,699 123 00:10:33,700 --> 00:10:37,700 or simply smooth sharp edges on the top beading. 124 00:10:37,700 --> 00:10:45,933 125 00:10:45,933 --> 00:10:55,766 Please note that as for now you are allowed to free-form the friction surface segments, you can deform these parts or their parallelism. 126 00:10:55,766 --> 00:11:10,666 127 00:11:10,666 --> 00:11:13,266 And here is the finished design. 128 00:11:13,266 --> 00:11:17,466 129 00:11:17,466 --> 00:11:23,766 You can now continue and add some attachments or cut some milled channels if required. 130 00:11:23,766 --> 00:11:29,199 This will be explained in a separate tutorial called "New Attachment Feature". 131 00:11:29,200 --> 00:11:30,633 132 00:11:30,633 --> 00:11:33,999 Thank you for watching this video.