1. Appliances description.

Authors	Appliances
Alvarez‐Arenal	Occlusal splint was a mandibular transparent thermopolymerising acrylic that was prepared via classical technique (fitting of models in a semiadjustable articulator). The occlusal surface was smooth and levelled with point form contacts, in centric relation, of the functional and non‐functional antagonist cuspids of the posterior teeth. In the anterior sector of the splint the contacts of the anterior teeth were less pronounced, and the inclined planes for the canine and protrusive guides were well defined to provide immediate disocclusion of the posterior teeth during mandibular eccentric movements.
Dube	Occlusal splint was a hard acrylic U‐shaped occlusal splint. Maxillary and mandibular arch impressions were made with alginate and models were cast in artificial stone. The centric tooth relation was taken with a blue wax waffle. A face bow was used to mount the models on a semiadjustable articulator. The splint was made on the maxillary models and then inserted and adjusted. The adjustment was made in centric relation with the use of a 32‐µm articulation paper. Only the points corresponding to contact between the lower buccal cusp and the splint were preserved. Adjustment of lateral guidance and protrusion was done by eliminating any contact other than with the canine in lateral or incisor in anterior‐posterior mandibular movements.
Dube	Palatal splint (can be called palatal control device) was active control made on the maxillary models and then inserted and adjusted. The device did not interfere with the occlusion in any mandibular movements and it was adjusted for maximum tooth intercuspation, and any tooth contact upon mandibular movement was eliminated.
Hachmann	Occlusal splint (called Michigan type bite plate) was a thermopolymerised colourness acrylic resin, worn in the maxilla, without palatal coverage. Maxillary and mandibular arch impressions were made with condensation silicone (Optosil ‐Xantopren ®) and models were cast in dental stone (Velmix ®). A face bow was used to mount the models on a semiadjustable articulator. The plate was built in wax (double layer of pink wax) being adapted over the maxillary arch teeth. The plate was1 to 3 mm in thickness, contact of all teeth in centric relation, disclusion of posterior teeth in lateral and in protusive movements, avoiding balancing side interferences through the anterior guidance.
Landry	Occlusal splint upper standard single was a classic hard acrylic resin. Dental impressions were made with irreversible hydrocolloid, and the working casts were poured with artificial stone (type III). A facebow was used to mount the models on a semiadjustable articulator. The central relation was registered with a rigid blue wax.
Landry	Mandibular advancement device free (MAD free) without pin between arches, which allowed freedom of movement.
Landry	Mandibular advancement device in 25% lower arch advancement position (MAD min).
Landry	Mandibular advancement device in 75% lower arch advancement position (MAD max).
Van der Zaag	Occlusal splint was a hard acrylic stabilisation type of splint, worn in the maxilla, with full coverage of the occlusal surfaces. It was 1 mm in thickness at the level of the first molar.
Van der Zaag	Palatal splint was hard acrylic resine with palatal coverage only.