{"id":5720,"date":"2026-03-10T12:50:48","date_gmt":"2026-03-10T11:50:48","guid":{"rendered":"https:\/\/smartalignerservices.com\/?p=5720"},"modified":"2026-03-10T12:50:48","modified_gmt":"2026-03-10T11:50:48","slug":"interincisal-diastema-after-marpe","status":"publish","type":"post","link":"https:\/\/smartalignerservices.com\/en\/interincisal-diastema-after-marpe\/","title":{"rendered":"How to close the interincisal diastema after MARPE"},"content":{"rendered":"

Once transverse expansion has been achieved in an adult patient treated with MARPE, many clinicians ask the same question: how should the interincisal diastema be closed?<\/p>\n

The objective is not simply to approximate the crowns. The key is deciding how to sequence the movement in order to maintain root control, take advantage of posterior anchorage, and avoid unwanted side effects in the anterior segment.<\/p>\n

In expansion protocols inspired by the designs described by Dr. Juan Carlos P\u00e9rez Varela<\/a>, particularly those using six micro-screws and solid skeletal anchorage, the posterior segment usually remains highly stable during the initial phase after expansion. This provides a clear biomechanical advantage if the MARPE device remains in place during the initial stage of diastema closure with aligners.<\/p>\n

A common mistake: closing the anterior teeth as a block<\/h2>\n

From a mechanical perspective, closing all anterior teeth simultaneously may appear efficient. However, it reduces individual control and makes root tip management more difficult. When the goal is stable closure, sequencing is more important than speed.<\/p>\n

For this reason, diastema closure should be approached as a deliberate sequence rather than a single global movement.<\/p>\n

First phase: central incisors<\/h2>\n

The strategy begins by moving only the central incisors.<\/p>\n

This decision follows a clear biomechanical rationale. By isolating the movement, the aligner maintains sufficient distal support, allowing the plastic to function as an active compression and control element. The presence of material distal to the teeth helps stabilize the tooth axis and reduces the tendency toward unwanted tipping.<\/p>\n

At this stage, real root control must be programmed. This involves:<\/p>\n