17 Questions
Which style of occlusion requires overlap of anterior teeth to prevent posterior contacts in all excursive movements?
Mutually protected occlusion
Which style of occlusion is also known as Group function?
Unilateral balanced occlusion
Which style of occlusion was developed by von Spee & Monson with the requirement of maximum number of teeth contacting in all excursive movements of the mandible?
Bilateral balanced occlusion
In which situation can Unilateral balanced occlusion be used?
When canines are periodontally compromised
Which style of occlusion involves overlap of anterior teeth to prevent posterior contacts in all excursive movements?
Mutually protected occlusion
Which type of movement does Mutually protected occlusion aim to prevent excessive wear during?
Protrusive movement
Which style of occlusion requires periodontally healthy anterior teeth and healthy jaw relations?
Mutually protected occlusion
What is the purpose of Bilateral balanced occlusion?
To maximize tooth contact in excursive movements
What is the primary benefit of minimizing orientation error of casts on an articulator?
Reducing adaptation for patients
What are the characteristics of ideal occlusion according to the text?
Posterior teeth in solid and even contact
Which of the following is stated as a sign or symptom of pathologic occlusion?
Abnormal wear
In which type of dentistry is no interocclusal record needed for single unit restoration with adequate posterior contacts and anterior guidance?
Conformative dentistry
What is required for reconstructive dentistry when dealing with multiple units and no distal posterior support?
Vertical dimension of occlusion
What does VDR refer to as per the text?
The postural position of the mandible when resting comfortably
What is the function of VDO according to the text?
Maintains vertical space for restoration and prosthesis
What are the causes of loss of VDO according to the text?
Excessive wear with loss of occlusal vertical dimension
What are the indications for restoration of VDO as mentioned in the text?
Space for restorations, function, esthetics, and phonetics
Study Notes
- Minimizing orientation error of casts on articulator: reduces adaptation for patients, decreases number of occlusal interferences, provides support and stability during mounting.
- Ideal occlusion: minimum adaptation for patients, posterior teeth in solid and even contact, anterior teeth in lighter contact, occlusal forces in long axes of teeth, no contact of posterior teeth during lateral or protrusive movements, posterior teeth contact more heavily in upright posture.
- Pathologic occlusion: etiology includes inadequate posterior support, excessive vertical and horizontal overlap due to supra-eruption, traumatic anterior guidance. Signs and symptoms are open contacts, abnormal wear, fremitus, widened PLD space, periodontal defects, mobility, rapid tooth migration, acute or chronic muscle pain, and pain, clicking or popping in TM joints.
- Conformative dentistry: no interocclusal record needed for single unit restoration with adequate posterior contacts and anterior guidance.
- Reconstructive dentistry: needed for multiple units with no distal posterior support, vertical dimension of occlusion, centric relation record, face bow record, and protrusive record/custom incisal guide table.
- Vertical dimension of restoration (VDR): the postural position of the mandible when resting comfortably, muscles are in minimal contractual activity, protects dentition, average freeway space is 3mm.
- Vertical dimension of occlusion (VDO): the distance between occluding members when in contact, supports facial profile, maintains vertical space for restoration and prosthesis, loss of VDO can result in loss of facial dimension, loss of restorative space, angular cheilitis, diminished masticatory function, phonetic compromise, and changes within TMJ(s).
- Causes of loss of VDO: excessive wear with loss of occlusal vertical dimension, excessive wear without loss of occlusal vertical dimension but with space available, excessive wear without loss of occlusal vertical dimension but with limited space.
- Indications for restoration of VDO: space for restorations, function, esthetics, and phonetics.
Test your knowledge of maxillo-mandibular records, occlusion components, and the vertical dimension of occlusion in fixed prosthodontics. Learn about the selection of appropriate records, signs and symptoms of occlusion components, consequences of VDO loss, and different occlusion styles.
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