crown lengthening (to overcome problems with gummy smile) factors must be considered –location of...
Post on 20-Dec-2015
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Crown Lengthening (To overcome problems with gummy smile)
• Factors must be considered– Location of gingival margins in relation to the
CEJ and the bone crest– Croon-root-alveolar bone relationships– Size and shape of upper lip– Location of lip during speech and during a
broad, relaxed smile
Crown Lengthening (To expose sound tooth structure)
• Subgingival location of caries lesions
• Subgingival location of fracture lines
• Inaccessibility of subgingival margins of failing restorations
• Inaccessibility of subgingival prepared tooth structure for proper impressions
Crown Lengthening (To expose sound tooth structure)
• Biological width:– It is the sum of the supracrestal fibers, the
junctional epithelium, and the gingival sulcus and has a proposed minimal dimension of 3 mm.
Crown Lengthening (To expose sound tooth structure)
• Techniques:– Apically positioned flap (with or without
bone resection)– Force eruption of teeth
Crown Lengthening (To expose sound tooth structure)
(Apical Positioned Flap)
• Indication:– multiple teeth
• Contraindication:– Single tooth
Crown Lengthening (To expose sound tooth structure)
(Force Eruption)
• Indications:– At sites where it is important to maintain the
location of the gingival margin at adjacent teeth unchanged
– At sites where removal of attachment and bone from adjacent teeth must e avoided
– At sites where with angular bony defects• Contraindications:
– Few teeth remaining