try in appointment&post insertion instructions
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TRY IN APPOINTMENT & POST INSERTION INSTRUCTIONS
Int. Academy of Prosthodontics www.prosth.net
THE TRY – IN APPOINMENT :
DEFINITION :
A trial denture defined as preliminary arrangement of denture teeth that has been prepared for placement into the patient’s mouth to evaluate aesthetics and maxillo – mandibular relationship.
Section 1 :
Perfection and verification of jaw relation records.
Section 2 :
Eccentric jaw relation records ; articulator and cast adjustments ; establishment of posterior palatal seal.
Section 3 :
Creating facial and functional harmony with anterior teeth.
Section 4 :
Phonetics.
Section 1 :Perfection and verification of jaw relation records.
Verifying vertical dimension
Verifying the centric relation
Intraoral observation of intercuspation
Extra oral articulator method
Verifying vertical dimension
Pre extraction records.
The amount of inter occlusal distance.
Phonetics and aesthetics.
The amount of inter occlusal distance between the teeth when the mandible is in its rest position.
Study of facial dimension and facial expressions.
Lip length in relation to the teeth.
The inter arch distance and parallelism of the ridges.
The condition and amount of shrinkage of the ridges.
Verifying the centric relation
Intraoral observation of intercuspation
Extra oral articulator method
Section 2 : Eccentric jaw relation records
Methods of registering the condyle path
Extra oral
Gysi & McCollum techniques
Intra oral
Plaster & carborundum grid – in
Chew – in by opposing wax
Chew – in modified by a central bearing point
Needles’s styluses cutting a compound rim
Needles’s technique modified by Messer man tracer
Protrusive registration in softened compound
Protrusive registration in plaster
Protrusive registration in softened wax
establishment of posterior palatal seal.
Soft tissue along the junction of hard and soft palates on which pressure within the physiological limits of the tissues can be applied by a denture to aid in retention of the denture.
T burnisher is used for marking the hamular notch on each side and PPS is marked.
PPS extends from ……….
Anteriorly … anterior vibrating line
Posteriorly… posterior vibrating line
Laterally … pterygomaxillary notch
Techniques :
Conventional technique
Boucher’s technique
Fluid wax technique
Stick compound technique
Extended palatal technique
Section 3 :Creating facial and functional harmony with anterior teeth.
Maintaining facial support and neuromuscular balance
When the muscles are correctly supported by a complete dentures impulses coming to them from the CNS cause a shortening of the fibers that allows the face to move in a normal manner.
Three factors affect the face in repositioning the orbicularis oris with complete denture.
The thickness of the labial flanges.
The anterioposterio position of the anterior teeth.
The amount of the separation between the mandible and the maxilla.
When properly shaped dental arches and favorable vertical dimension
Normal function of the facial muscle
Normal facial expressions and proper tone of the skin
Basic guides to developing facial & functional harmony :
The preliminary selection of the artificial teeth.
The horizontal orientation of the anterior teeth.
The vertical orientation of the anterior teeth.
The inclination of the anterior teeth.
Harmony in the general composition of the anterior teeth.
Refinement of the individual tooth positions.
The concept of harmony with sex, personality, and age of the patient.
The correlation of the aesthetics and incisal guidance.
The preliminary selection of the artificial teeth.
Size , form , color of the teeth.
Rotation , overlapping and spacing between the teeth.
The horizontal orientation of the anterior teeth.
If the anterior teeth are in proper position vermilion border is visible ,corner of the mouth assume normal contour & skin is toned & nasolabial groove is prevented from drooping.
A common error is to attempt to establish a standard vertical & horizontal overlap without regard to the ridge relation this should not be done because anterior posterior position must correspond to the position of the ridges.
The vertical orientation of the anterior teeth.
Test :
length of the upper lip can be estimated by placing the index finger on the incisive papilla with relaxed upper lip extending down over the finger.
the finger length covered by the upper lip indicates the length of the upper lip.
The inclination of the anterior teeth.
The inclination of the anterior teeth should be parallels to the profile line of the face.
Harmony in the general composition of the anterior teeth.
Central incisors in square arch assume a position on a line with a canine.
In tapering arch rotating and overlapping of the teeth is common.
In ovoid arches canine position forwardly with seldom rotation.
Refinement of the individual tooth positions.
Maxillary central incisors – parallel to the profile line
Maxillary lateral incisors – cervically inwards
Maxillary canine – cervically outward
Mandibular central incisors – cervically inward
Mandibular lateral incisors – cervically outward then mandibular central incisors
Mandibular canine – cervically outward
The concept of harmony with sex, personality, and age of the patient.
Femininity is characterized by curved surface, roundness and softness.
Masculinity is characterized by boldness , vigor and square ness.
Personality divided into delicate , medium, and vigorous.
It affects the selection of molds , colors , position of the teeth and forms.
Section 4 : Phonetics
Bilabial sounds …. B, P, M are the sounds where the two lips contacts.
Labiodental sounds …. F, V are the sounds shows the relationship of the incisal edges of the maxillary incisors to the lower lip.
Linguodental sounds …. eg Th are the made with the tip of the tongue extending slightly between the upper and lower anterior teeth.
Linguoalveolar sounds …. T , D, S, Z, V, L are the sounds which makes the contact of the tip of the tongue with the most anterior part of the palate.
POST INSTRUCTIONAL INSTRUCTIONS :
INDIVIDUALITY OF THE PATIENT
Don’t compare their progress with new denture to the other person’s experiences.
Adaptability to new denture is modified by age.
APPEARANCE WITH NEW DENTURE
Feel strange , bulky,.
Fullness of the lips and cheeks
Advice to change glasses and hair styles.
MASTICATION WITH NEW DENTURES
6 – 8 weeks
Excess flow of saliva
Soft food
Both sides
Eat from posterior teeth
SPEAKING WITH NEW DENTURES
2 – 3 weeks
Read aloud and repeat words that are difficult to pronounce
ORAL HYGIENE
Instructed to rinse the dentures after meal
Cleanser
Never use tooth paste because most contains abrasive materials
Denture should be brushed over a basin partially filled with water
Brush ridge and tonguePRESERVING THE RESIDUAL RIDGES
Denture must be left out from the mouth in the night
Not to use abrasive and home liners for ill – fitting denture
Put the denture in the water
Thank you