(BQ) Part 2 book “Textbook of complete denture prosthodontics” has contents: Principles of arrangement of teeth, try-in procedure in complete denture treatment, laboratory procedures following try-in procedure, denture insertion and patient education, immediate complete denture, and other contents. | SELECTION AND MODIFICATION OF TEETH FOR AESTHETICS AND FUNCTION 103 104 TEXTBOOK OF COMPLETE DENTURE PROSTHODONTICS INTRODUCTION Teeth selection is not simply a mechanical procedure but requires dexterity and knowledge of biology. Selection of teeth forms an important step before teeth arrangement. PRINCIPLES OF SELECTION OF ARTIFICIAL TEETH • • • • The teeth should appear natural and life-like. It should serve the functional need of the patient. They should be easy to use in laboratory procedures. It should be possible to position them within the anatomical limits of the foundation. METHODS OF ANTERIOR TEETH SELECTION Pre-extraction Records a. Diagnostic casts: The diagnostic casts of patient’s natural teeth or restored teeth prior to extraction of remaining teeth provide a basic idea for teeth selection. b. Recent photographs: They will often provide general information about the width of the teeth and possibly the outline form that is more accurate than information from any other source. c. Radiographs of teeth: Radiographs, made before the natural teeth were lost, can provide information about the size and form of the teeth to be replaced. The radiographic images, however, may be enlarged and distorted because of divergence of the X-ray. FACTORS OF SELECTION OF ANTERIOR TEETH • Size • Form • Colour Size of Anterior Teeth The length and the width of the teeth determine it. Length Normally, the necks of anterior teeth overlap the anterior ridge by 2 to 3 mm cervically and incisal edges will show below the relaxed lip. The visibility is approximately 3 mm in young patients and half of it in old patients. Width i. Measuring the width of anterior teeth Bizygomatic width Estimated width of = 16 maxillary central incisors. Bizygomatic width Approximate width = of 6 anterior teeth. ii. Mark the corners of the mouth on the occlusal rim in the mouth and the distal surface of the upper canines can be indicated by marks made on the upper rims at the corners of
