page_title: Complete denture occlusion
section_title: Bilateral balanced occlusion
hierarchical_section_title: Complete denture occlusion / Balanced occlusal schemes / Bilateral balanced occlusion
caption_attribution_description: English: Close up picture of a model of shark's teeth
context_page_description: Occlusion according to The Glossary of Prosthodontic Terms Ninth Edition is defined as 'the static relationship between the incising or masticating surfaces of the maxillary or mandibular teeth or tooth analogues'.
  When exploring different complete denture occlusal schemes, it is more useful to define occlusion as the relative movement of one object to another viz the dynamic relationship between mandible to the maxillae during function. Bilateral balanced occlusion and non-balanced occlusion are two separate entities that make up complete denture occlusion. Bilateral balanced occlusion is observed when simultaneous contacts achieved in both centric and eccentric positions. Non-balanced occlusion is seen when teeth do not occlude in simultaneous contacts. Both concepts will be explored in greater detail in the following article.
context_section_description: Gysi's geometrical concept underpinned bilateral occlusion schemes for both edentulous and dentate patients. Bizarrely, the theory was based on scratch-marks created using a simulated sharks' teeth model recorded on an opposing plaster cast.
  From the above observation, 33° 'cuspal formed' teeth were introduced such that the cuspal inclination would be parallel with the condylar angle in the sagittal/horizontal plane when set-up mid-way between the condyle and incisors. The aim of this scheme was to achieve cuspal contact in excursive movements such that this would improve the stability of the prostheses in lateral excursions and direct forces towards the alveolar ridges.
caption: Gysi utilised a simulated shark's teeth model to illustrate bilateral occlusal schemes in both edentulous and dentate patients.
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