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How should the appropriate size implant be selected?

Last Updated: Oct 06, 2013 01:27AM EDT
  • The appropriate implant length and width depends upon the available bone and the expected occlusal loads.
  • In general, choose the widest but not necessarily the longest implant possible.
  • Panoramic and periapical radiographs as well as diagnostic models and a clinical examination are used to determine if enough mesio-distal space and vertical bone height exist to place a Bicon implant safely and appropriately in a proposed site.
  • A transparent ruler or an implant radiograph overlay, which depict implant outlines of actual size and 125% of actual size, is helpful in selecting an appropriately sized implant. Since radiographs are not necessarily precise representations, knowledge of their magnification must be considered while using them to determine an appropriately sized implant.

​The following chart contains recommendations only. Actual clinical conditions and the clinician’s assessment of the patient should be the main criteria for choosing the size of an implant for a particular area.


  • ​The 3.5mm diameter implants are generally for mandibular anterior teeth. If practical, their use should be avoided for maxillary anterior and all posterior teeth.
  • The 5.0 x 6.0mm implant is capable of supporting any tooth in the dental arch.
  • From the canine posteriorly, if practical, place one implant per tooth being replaced.
  • Consider using Integra-CP™ implants in poor quality or grafted bone.
  • It is advisable to have at least 1.0mm of bone around the implant. Therefore, an advisable bone width is 5.5mm to comfortably accommodate a 3.5mm implant, unless ridge splitting or grafting techniques are employed to widen the site.
  • In the anterior maxilla, it is advisable to place MAX 2.5™ Implants.
  • The width of the alveolar bone may be assessed with a periodontal probe or caliper. It is advisable to have 1.0mm of bone around an implant for a long-term favorable prognosis.
  • For maxillary anterior implants, always anticipate the potential need for ridge splitting or bone grafting techniques.

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