[Periodontal-hygiene viewpoint for the technician in the preparation of artificial teeth. I].
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The study was done to determine the validity of William's geometric theory of tooth selection. The maxillary central incisors of 31 subjects were radiographed and photographed; casts were made of the maxillas; and the subjects' faces were photographed. Three dentists classified the form of the maxillary central incisors as shown by intraoral photographs, radiographs made by the parallelling technique, and casts, and also classified the form of the face from frontal-view photographs. The data collected were reduced by an electronic computer to determine if a correlation exists. There was no correlation between the form of the face and the form of the maxillary central incisors.
Complete wound closure over an immediate implant is considered to be a desirable goal. This case report describes for the first time the use of a connective tissue autograft placed under the existing flap margins of an extraction socket to successfully achieve closure over an immediate implant covered with an occlusive membrane. The rationale of the method is described. Healing was uneventful and epithelization of the graft surface from surrounding tissues was achieved. This technique created an increased width of keratinized tissue and avoided the need to disrupt the normal anatomical relationships of the surrounding buccal tissues, in contrast to current techniques. The advantages of the technique, together with factors that may influence healing and predictability, are discussed.
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