Professor Planas described masticatory physiology through what he defined as laws. What is interesting about this laws for the clinician, is what they do from a pure clinical stand point. That is why you will be able to apply them immediately in your patients.
We will speak about three main concepts:

• Minimal Vertical Dimension Law: This law explains the Centric Relation position as well as the initial and final position of the masticatory cycle. We will determine which are the occlusal conditions that drive the mandible to a determined centric position.

• Planas Functional Masticatory Angle: It explains the masticatory efficiency of the patient. It allows the clinician to compare the masticatory function in both sides of the mouth. It will help the clinician to identify unilateral mastication patterns and its derived problems.

• Planas Development Laws: It will allow us to understand how masticatory function models morphology and function of the elements of the masticatory system. We will see how mastication will model maxillo-mandibullar bone bases and TMJ function. Also, Development Laws will explain how to guide and orient determined dental movements as well as how will model and establish the occlusal plane.

During this course, we will define the treatment elements that we utilize to control our patient's development inside our orthodontic treatment concepts. Although, we have to say that Professor Planas insisted in not understanding these treatments as orthodontic methods, but rather as the application of a concept that leads balanced occlusion through functional development.
We will speak about three main treatment elements:

• Selective grinding or Occlusal Balancing: With the application of this technique we try to mold and adapt the tooth occlusal surfaces. It can be done in permanent dentition but it will be especially interesting in temporary dentition. With this we will be able to control masticatory function and optimize occlusion to a better balance.

• Direct Tracks with composite resin: Following the same concept explained above, we can mold the occlusal surface of each tooth through additive techniques. This will allow us to control masticatory function and the mandibular position of the patient. This technique is usually applied in temporal dentition.

• Planas Appliances: Finally, we will introduce the Planas Appliances. We will start describing the Appliances with Tracks, but we will specially insist in the mechanism of this appliances which is what determines its functionality to obtained a balanced occlusion.

The entire presentation will logically be supported by a series of examples and clinical cases that will help to understand these concepts.