# Balanced Occlusion Basics > Balanced occlusion in BDS Prosthodontics: bilateral contacts in eccentric movements, compensating curves, cusp angles and lingualised schemes. - Canonical URL: https://prepelephant.com/topics/bds/prosthodontics/balanced-occlusion-basics - Exam / course: BDS · Subject: Prosthodontics - Publisher: PrepElephant (https://prepelephant.com) — Prepared and reviewed by the PrepElephant Academic Review Team - First published: 2026-10-02 - Last updated: 2026-10-02 - How to cite: "Balanced Occlusion Basics", PrepElephant, https://prepelephant.com/topics/bds/prosthodontics/balanced-occlusion-basics ## Direct answer Because a denture sits on mucosa rather than rooted in bone, every unbalanced contact is a tipping force: balanced occlusion is the scheme that keeps contacts distributed so the prosthesis never rotates. The Glossary definition is simultaneous contacting of maxillary and mandibular teeth on the right and left sides, and in the anterior and posterior regions, in centric and in eccentric positions — working-side contacts paired with balancing-side contacts, protrusive movement stabilised by posterior contacts. It is engineered with five interacting factors (Hanau's quint), compensating curves standing in for steep cusps where teeth are flat, and a lingualised variant that concentrates function on the maxillary lingual cusps. The scheme belongs to dentures; in natural dentition it would be pathology. ## What you must remember - **Definition:** bilateral simultaneous contacts in centric, protrusive and lateral excursions — three-point stability in protrusion (anterior plus both posterior segments), cross-arch pairing in laterality. - **Hanau's quint:** condylar guidance, incisal guidance, cusp height (cusp angle), compensating curve, and orientation of the occlusal plane — the five factors whose interplay the scheme tunes. - **Tooth forms:** anatomic teeth with 30–33 degree cusp angles, semi-anatomic around 20 degrees, and non-anatomic (monoplane, zero-degree) teeth; steeper cusps demand steeper compensating curves to stay balanced. - **Compensating curves:** curve of Spee (anteroposterior), curve of Wilson (mediolateral), together conceptualised as the sphere of Monson; they create balancing contacts without steep cusps. - **Lingualised occlusion** (associated with Payne and Pound): maxillary 30-degree lingual cusps occlude against flat or shallow-cusped mandibular teeth — aesthetics of anatomic upper teeth with reduced horizontal force. - **Mechanical logic:** without balancing contacts, a working-side bite rotates the denture around the ridge crest; the balancing-side contact is the counterlever that keeps the base seated. - **Limit of the concept:** balanced occlusion applies to complete dentures (and some implant-assisted removable cases); it is deliberately not reproduced in fixed or natural dentitions. ## Reasoning through an arrangement, factor by factor Suppose a patient's condylar guidance — the one factor you cannot choose — is steep, programmed from a protrusive record onto a semi-adjustable articulator. Incisal guidance is yours to set: keeping it shallow (a small vertical overlap with adequate horizontal overlap) avoids anterior leverage that would tip the denture down in front. With anatomic 30-degree teeth on both arches, steep cusps plus steep guidance can be balanced only by a pronounced compensating curve, so the plane is arranged with a deliberate posterior rise. If the ridges are flabby or resorbed, the safer reasoning flips the choices: monoplane or lingualised teeth, minimal cusp interlock, and balancing via a moderate curve — trading shearing efficiency for stability that poor foundations can defend. Every adjustment honours the same arithmetic; when one Hanau factor rises, another must give. Working a case through the quint, aloud, is precisely how the viva examiner expects it defended. ## Where students slip The favourite confusion is exporting the concept: candidates recommend "balancing contacts" for a fixed partial denture or natural teeth, where the aim is mutually protected or canine-guided occlusion and cross-arch balancing contacts would be an interference. The second slip is quoting Hanau's quint incompletely — forgetting the occlusal plane orientation or the compensating curve is common under pressure. The third is believing non-anatomic teeth make balance unnecessary: monoplane teeth still require balanced contacts in protrusion and laterality, achieved by curves rather than cusps, and the examiner's follow-up question ("how do zero-degree teeth balance?") is where the unprepared stall. ## Frequently asked questions ### What is balanced occlusion in complete denture prosthodontics? Simultaneous bilateral contacts of the teeth in centric and in all eccentric positions, so that working-side function is always counterlevered by balancing-side and protrusive contacts. ### List Hanau's quint of occlusal factors. Condylar guidance, incisal guidance, cusp height or angle, compensating curve, and the orientation of the occlusal plane — the five interdependent determinants of denture balance. ### What is lingualised occlusion and why is it popular? A scheme in which only the maxillary lingual cusps (typically 30-degree) function against shallow mandibular teeth, giving anatomic aesthetics with reduced lateral shear on the ridges. ### Why is balanced occlusion not used for natural teeth? Natural teeth are anchored by periodontium and tolerate — indeed prefer — canine or group function guidance; cross-arch balancing contacts would overload them as interferences. ### How do zero-degree teeth achieve balance without cusps? Through compensating curves (Spee and Wilson): the curved arrangement substitutes for cusp angulation, producing posterior contacts in protrusion and balancing contacts in laterality.