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BASIC OCCLUSAL FORMS 1. Anatomic, balanced occlusion. 2. Semi-anatomic, balanced occlusion. 3. Nonanatomic, balanced occlusion. 4. Neutrocentric occlusion. 5. Lingualized occlusion.
: Balanced or
: Non-balanced
Advantages of Anatomic Occlusion 1. Esthetics. 2. Better penetration of food bolus, 3. Decrease of vertical stresses. 4. Harmony with muscles of mastication and
TMJ during functional and non-functional movements.
Disadvantages of Anatomic Occlusion 1. precise technique required. 2. greater lateral forces 3. more time, not long-lasting, require
occlusal adjustment 4. difficult to tooth position in class II, III, X-
bite
SEMI-ANATOMIC, BALANCED OCCLUSION
Advantages of Semi-anatomic Cusp Teeth 1. Esthetics 2. Good chewing efficiency 3. Balanced occlusion 4. Less lateral forces 5. Functional occlusal balance
Disadvantages of Semi-anatomic Cusp Teeth 1. Same as for anatomic teeth. 2. More difficult to achieve cross arch, cross
tooth balance. 3. Esthetics reduced somewhat by
decreasing the incisal guidance of anterior teeth.
NONANATOMIC, BALANCED OCCLUSION
Balanced occlusion for non-anatomic teeth may be accomplished by:
1.compensating curve 2.tilting the second molar 3.placing the balancing ramp
NONANATOMIC, BALANCED OCCLUSION
compensating curve
NONANATOMIC, BALANCED OCCLUSION
tilting the second molar placing the balancing ramp
Advantages of NonanatomicOcclusion
1. Slightly more esthetic than neutrocentric occlusion.
2. patients with poor neuromuscular coordination,
difficult to obtain precise, repeatable jaw relation records.
Advantages of NonanatomicOcclusion
3. Less time involved in set up and articulation.. 4. patients with cross bite or Class III relationships
and particularly for patients with Class II relationships who move the mandible far forward in functional relationships.
Disadvantages of NonanatomicOcclusion 1. Use of a compensating curve may cause
the same damaging effects as cuspal inclines.
2. Occlusal adjustments are more difficult to accomplish.
NEUTROCENTRIC OCCLUSION "neutralizing cuspal inclines and centralizing
occlusal forces". Position Proportion Pitch Form Number
Advantages of Neutrocentric Occlusion 1. simple and less time consuming. 2. less precise jaw relation records. 3. lateral forces are reduced by eliminating
(neutralizing) cuspal inclines.
Advantages of Neutrocentric Occlusion 4. simpler and easier occlusal adjustments 5. occlusion is not locked 6. good for patients with Class II (Retrognathic),
Class III (Prognathic) and crossbite ridge relations.
7. for the geriatric patient
Disadvantages of Neutrocentric Occlusion 1. least esthetic 2. poor bolus penetration 3. disclusion of the posterior teeth in Class II
patients. 4. can not be balanced in eccentric
excursions.
LlNGUALIZED OCCLUSION A lingualized occlusal scheme can be: 1. Bilaterally balanced. 2. Non-balanced
LlNGUALIZED OCCLUSION
Balanced lingualized class I arrangement
Tooth- to- tooth
Max. Li cusp to central fossa
LlNGUALIZED OCCLUSION
A 20-degree occlusal template being used to generate the occlusal plane
LlNGUALIZED OCCLUSION
Cross-arch contacts during an excursive movement
LlNGUALIZED OCCLUSION
Balanced lingualized class II arrangement
Narrower mand. anterior
Drop mand. first premolar
LlNGUALIZED OCCLUSION
Balanced lingualized class III arrangement
Wider mand. Anterior
Drop max. first premolar
LlNGUALIZED OCCLUSION
Cross-bite, Li cusp plays no role at all
LlNGUALIZED OCCLUSION
Nonbalanced lingualized class I
Blunt max. Li cusp and mand. limited occlusal anatomy
Advantages of LingualizedOcclusion 1. Esthetics 2. Better penetration of the food bolus 3. Decrease of vertical and lateral forces 4. Simpler technique. less precise CR
records 5. Useful in a wide variety of patients
Advantages of LingualizedOcclusion 6. Added stability is gained during
parafunctional movements with a balanced occlusion.
7. Easier to adjust occlusion 8. May be used in Class II, Class III and
crossbite 9. may be used to incorporate many of the
advantages but few of the disadvantages of other occlusal schemes.
SUMMARY AND CONCLUSIONS There is no one ideal occlusal scheme to fit al
l the variety of patient situations and requirements.
There is not clear cut research in occlusion to support one occlusal scheme over another
การสบฟั�นได้�ด้�ล (Balanced Occlusion)
Christensen’s phenomenon
แสุดงว�ธี�ขากรรไกรท��มี�จุดหมีนัเก�ดจุากเสุ�นัท��ลากตั้��งฉากก�บแนัวนั"าคอนัดายล$และแนัวนั"าปลายฟั(นัหนั�าตั้�ดก�นั
แสุดงว�ธี�ขากรรไกรขณะ
สุบย)�นั
แนัวนั"าปลายฟั(นัหนั�าท��มี�ค*ามีากข+�นัจุะท"าให�ว�ธี�ขากรรไกรชั�นั
มีากข+�นั
เสุ�นั AB แทนัว�ธี�ขากรรไกรขณะเป.นัด�านัดลเสุ�นั CB แทนัว�ธี�ขากรรไกรด�านัเด�ยวก�นัแตั้*ท"าหนั�าท��เป.นัด�านัใชั�งานั
ปั�จจ�ยที่��มี�ผลต่�อการสบได้�ด้�ล แนัวนั"าคอนัดายล$ (Condylar guidance) แนัวนั"าปลายฟั(นัหนั�า (Incisal guidance) ระนัาบสุบ (Plane of occlusion) โค�งชัดเชัย (Compensating curve) ความีลาดเอ�ยงของฟั(นั (Inclination of the teeth)
Hanau’ Quints
= K HCG x IG
CC x CA xOOP
= K HCG x IG
CC x CA xOOP
ขอบคณคร�บ
