smile consideration.pptx
Page 1: Introduction
/
Smile Consideration in Orthodontics
Page 2: Problems from Malocclusion
Protruding, irregular, or maloccluded teeth can cause three main issues for patients:
(1) Unsatisfaction due to facial appearance.
(2) Oral function problems affecting chewing and speech.
(3) Increased risk for trauma, periodontal disease, or tooth decay.
Social responses linked to facial and dental appearance can significantly impact an individual's life adaptation.
Severe malocclusion may act as a social handicap.
Patients expect improvement in social and psychological well-being from treatment, with functional improvement as a secondary benefit.
Page 3: Maturational and Aging Changes
Maturational changes influence both hard and soft tissues in the face and jaws, leading to changes in jaw relationships and soft tissues over time.
Aging effects impact teeth, supporting structures, and dental occlusion.
Page 4: Changes in Soft Facial Tissues
Soft tissue changes are more significant than hard tissue changes in the face.
Lips and facial soft tissues sag with aging, affecting the exposure of upper and lower incisors during rest and smiles.
Aging leads to progressively thinner lips and less vermilion display.
Page 5: Changes in Alignment and Occlusion
Late teens and early twenties often see crowding of mandibular incisors regardless of initial alignment.
If initially well-aligned, mild crowding may develop and worsen over time.
Theories explaining crowding include:
Lack of normal attrition due to modern diet.
Pressure from third molars.
Late mandibular growth.
Page 6: Changes in Teeth and Structures
The pulp chamber in permanent teeth is larger at eruption but becomes smaller over time due to slow dentin deposition.
Page 7: Gingival Attachment Changes
At the eruption of permanent first molars, gingival attachment is initially high on the crown; this changes due to vertical jaw growth and tooth eruption.
Aging often causes gingival pathology, leading to common recession of the gingiva.
Page 8: Passive Eruption Misconceptions
Previously thought that “passive eruption” involved gingival migration without tooth eruption; this is now deemed inaccurate.
Actual observations show active eruption compensating for ongoing vertical growth during teenage years.
Page 9: Goals of Orthodontic Examination
Two primary goals:
Evaluate and document oral health, jaw function, facial proportions, and smile characteristics.
Identify necessary diagnostic records.
Page 10: Systematic Examination Steps
Evaluation of facial and dental appearance involves three steps:
Facial proportions in three planes (macro-esthetics).
Dentition relation to face (mini-esthetics).
Teeth relations to each other (micro-esthetics).
Page 11: Mini-Esthetics Evaluation
Dentition assessment includes:
Display of teeth at rest, speech, and smile.
Screens for excessive gingival display, inadequate tooth display, and inappropriate gingival heights.
Page 12: Facial Proportions - Macro-Esthetics
Initial analysis of facial proportions during evaluation needs to include developmental characteristics and general impressions to avoid overlooking key features.
Page 13: Developmental Age Assessment
For children, particularly in puberty when orthodontic treatment is most common, physical maturity is a more accurate determinant for remaining growth than chronological age.
Page 14: Frontal Examination
Analyze facial proportions in frontal view focusing on bilateral symmetry and proportionality in facial features.
Page 15: Historical Examination Techniques
Prior to cephalometric radiography, anthropometric measurements provided facial proportion data during clinical examination.
Page 16: Facial Height and Width Index
Proportional relationships are crucial for evaluating overall facial type and basic proportions in the frontal and lateral views.
Page 17: Profile Analysis
Profile evaluations yield critical information regarding underlying skeletal relationships and are a valuable diagnostic tool for all dentists.
Page 18: Goals of Profile Analysis
Three primary goals are:
Determine jaw positioning in anteroposterior plane of space.
Evaluate lip posture and incisor prominence.
Reevaluation of vertical facial proportions and mandibular plane angle.
Page 19: Evaluation of Jaw Relationships
Understanding profile convexity/concavity provides insight into skeletal Class II or Class III relationships based on jaw positioning.
Page 20: Incisor Protrusion and Lip Posture
Important to assess incisor position regarding space in dental arches and how racial/ethnic factors influence lip posture.
Page 21: Vertical Proportions and Mandibular Plane
Vertical proportions are analyzable in profile view, focusing on the mandibular plane angle to inform about facial height relationships.
Page 22: Visualizing Mandibular Plane
The mandibular plane angle provides additional insights into the vertical relationship and should be evaluated routinely.
Page 23: Importance of Facial Form Analysis
Quick facial form analysis provides unique insights absent from dental radiographs and casts; it is essential for dentists evaluating orthodontic patients.
Page 24: Tooth-Lip Relationships - Mini-Esthetics
Assess symmetry and midline relationships between dental and skeletal midlines during clinical examination.
Page 25: Vertical Relationships of Teeth to Lips
Measure incisor display at rest and on smile to understand the relationship with lip length and face proportions.
Page 26: Transverse Occlusal Plane Relationships
Evaluate transverse cant of the occlusal plane during a smile, which is usually unrecognizable in models/layouts.
Page 27: Smile Analysis
Smile characteristics significantly impact perceived facial attractiveness; analysis is important for orthodontic consideration.
Page 28: Smile Dynamics Importance
Explore various smile types and recognize the impact of facial soft tissue dynamics on smile aesthetics.
Page 29: Incisor and Gingival Display
Ideal incisor display parameters to ensure aesthetic appeal, noting how changes occur with aging and treatment.
Page 30: Width of Smile and Buccal Corridors
Smile attractiveness influenced by the width of the smile relative to facial proportions, with minimal buccal corridors being preferred.
Page 31: Contour Matching of Smile Arc
Ideal smile arc is essential with upper teeth contour matching the lower lip curve for best aesthetic outcomes.
Page 32: Micro-Esthetics
Detailed evaluation of tooth proportions and gingival contours necessary for optimal aesthetic results in orthodontics.
Page 33: Tooth Proportions
Stresses the appearance of maxillary anterior teeth in relation to each other and to ensure proportionate aesthetics.
Page 34: Width Relationships - Golden Proportion
Discusses ideal widths of anterior teeth based on proportions to ensure aesthetically pleasing smiles.
Page 35: Height-Width Ratios
Relation of height-to-width ratios needs to be assessed to determine proportionality and potential issues in presentation.
Page 36: Causes of Height-Width Discrepancies
Identifies various reasons for discrepancies in height-to-width ratios including anatomical and treatment-related factors.
Page 37: Gingival Relationships
Importance of maintaining gingival margin heights for aesthetic considerations in orthodontics and individual recognition to avoid perceived discrepancies.
Page 38: Connectors and Embrasures
Evaluation of interdental contact areas and embrasures is essential for an aesthetically pleasing smile.
Page 39: Connector Heights
Describes normal connector heights in relation to tooth arrangement, emphasizing recognition of variations.
Page 40: Black Triangles
The impact of black triangles on aesthetic outcomes, especially in adult orthodontic corrections post-crowding.
Page 41: Tooth Color and Shade Changes
Shade progression in teeth as a function of age and the importance of maintaining attractive coloration patterns in aesthetics.
Page 42: Characteristics of a Normal Smile
Key features that define an attractive smile, highlighting proportions, symmetry, and aesthetic appeal.
Page 43: Conclusion
Thank You!