Crown

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Crown

A former coin in the United Kingdom equal in value to five shillings, or 1/4 of one British pound. The last crown was minted in 1965. Following decimalization in 1971, a 25-pence coin was minted to replace the crown. Informally, crowns were called dollars, recalling the time when one pound was worth four U.S. dollars.
References in periodicals archive ?
Defining biologic width in crown lengthening. CDS Rev 1995; 88: 20-3.
Biologic width and crown lengthening: case reports and review".
Five weeks following nonsurgical endodontic therapy of tooth #3, the patient presented for crown lengthening of teeth #2-5 under moderate sedation.
Specific techniques discussed include: tooth extraction, crown lengthening, ridge expansion, maxillary sinus lift, bone grafting, and more.
Surgical Crown Lengthening: A 12--Month Clinical Wound Healing Study.
The outstanding chapter on surgical crown lengthening is sure to aid the dental hygienist in understanding this important procedure for pocket maintenance.
In addition, tooth wear from erosion may reduce the crown height which in turn reduces the resistance and retention form which may warrant surgical crown lengthening to overcome this.
They describe how to use these questions to determine a diagnosis and provide chapters on crown lengthening surgery, tissue grafting, dentoalveolar intrusion of the adult dentition, forced eruption, orthognathic surgery, dental facial plastics, dentoalveolar extrusion, and sequencing the treatment plan, as well as providing a treatment-planning template on the accompanying CD and five case studies.
Crown lengthening procedure was carried out using soft tissue laser in department of periodontology Rajarajeswari Dental College Bangalore.
In this case the traumatized central incisor had an extensive tooth structure loss which needed root canal treatment and crown lengthening procedure to expose root margins to enable the operator to restore it with cast post and core where the aesthetic outcome of crown lengthening procedure will be less than sat- isfactory due to the disruption of the gingival margin level in comparison with the adjacent teeth.
Crown lengthening: The advantage of lasers in crown lengthening is that it cuts only at the tip and they can be held parallel to long axis of the tooth to remove bone immediately adjacent to cementum without damaging it.