Custom sectional impression trays for patients with microstomia - Transfer the respective points of the half-cut in position, secure the heads of the half-cut die- die-pin heads on the acrylic bar by using a pres- pins into the holes by using the autopolymerizing sure spot indicator (Coltene® PSI, Switzerland) acrylic resin (Figure 5 & Figure 6). and drill slightly oversized holes in the acrylic bar on the marked points by using a bur (261-EF023, DISCUSSION Brasseler, USA). The 2-piece custom-made tray described above - With the closely juxtaposed sectioned trays allows for a functional impression to be made de- and the die-pins of the anterior assembly placed spite the difficulties associated with microstomia. Figure 3. Sleeves attached using autopolymerising acrylic resin. Figure 2. a-b. Slots made for attaching sleeves in each half of maxillary sectioned tray. a) Inside view, b) top view.view of anterior locking assembly. Figure 4. Components of posterior locking assembly- an acrylic block and upper halves of two dual pins and sleeves cut halfway through their height. Figure 5. Half-cut sleeve positioned on each sectioned tray and corresponding pins Figure 6. Completed sectional trays with both anterior and posterior locks assem- attached to acrylic block. bled (Maxillary). 246 European Journal of Dentistry