{"id":1588,"date":"2021-05-13T15:07:44","date_gmt":"2021-05-13T05:07:44","guid":{"rendered":"http:\/\/diamond-dental.com.au\/?p=1588"},"modified":"2021-05-13T15:12:38","modified_gmt":"2021-05-13T05:12:38","slug":"24-the-importance-of-crown-to-root-and-crown-to-implant-ratios","status":"publish","type":"post","link":"https:\/\/www.diamond-dental.com.au\/2021\/05\/13\/24-the-importance-of-crown-to-root-and-crown-to-implant-ratios\/","title":{"rendered":"#24: The importance of crown to root and crown to implant ratios"},"content":{"rendered":"

[vc_row css_animation=”” row_type=”row” use_row_as_full_screen_section=”no” type=”full_width” angled_section=”no” text_align=”left” background_image_as_pattern=”without_pattern”][vc_column width=”5\/6″][vc_column_text]As dentistry equipment becomes more precise, we can see some exciting new methods of tooth restoration coming into regular practice. Dentures are being replaced by <\/span>more permanent and lifelike implants<\/span><\/a>. The implants are inserted into the bone and can be naturally strengthened over time as the bone grows to incorporate the implant.<\/span><\/p>\n

Now you have a real choice when it comes to missing or broken teeth with dental implants fast becoming a popular treatment option.<\/b><\/p>\n

Whether or not implants are suitable for you, and the type of implants you need, is determined by measuring your tooth ratio in relation to the distance of the tooth to the jaw and the size of the tooth above the gums. The ratios take into account the size of the tooth crown, the de<\/span> pth of the roots, the size of the implant and the proximity of the jaw bone. These estimations are important in overcoming the technical and biological complications that can arise from implant procedures.<\/span><\/p>\n

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These measurements are taken either using the damaged tooth that will be replaced, or the surrounding teeth if the tooth is missing.\u00a0\u00a0\u00a0<\/b><\/p>\n

\"TheCrown to Root Ratios<\/span><\/h2>\n

Historically, Crown to Root Ratios (CRRs) have been used to help decide the best method for restoring or removing teeth. This is a measure that determines how the tooth sits in the <\/span>alveolar bone<\/span><\/a> to estimate how well supported an implant will be. The guidelines are based on comparisons of previous successful and unsuccessful implants and what their ratios were.\u00a0<\/span><\/p>\n

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Ratios help a dentist estimate if a replacement tooth will be successful, based on how much pressure and flexibility the implant will have to withstand.\u00a0<\/b><\/p>\n

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Using CRR alone meant there were often occasions where teeth were removed which could actually have been restored if a different measure could have been applied, rather than just CRR.<\/span><\/p>\n

Crown to Implant Ratios<\/span><\/h3>\n

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With Crown to Implant Ratio (CIR) the numbers factor in how much support the tooth will get from the bone as well as from the implant itself. Using these calculations a dentist can more accurately determine if a tooth implant will be successful over time for patients who may not have been successful with a CRR measure.<\/span><\/p>\n

It is important that both these ratios are calculated correctly as they will determine how long and deep an implant will need to be to withstand the force of biting. If this ratio is not correct, it can be harmful to the implant, or cause stress and damage to the bone.<\/span><\/p>\n

The ratios act very differently. Modern dentists need to look at both ratios to have a clear understanding of their patient\u2019s needs and estimate the success of an implant.<\/b><\/p>\n

The measures not only help understand how successful a tooth implant will be, but they also help decide the size of the different tooth restoration pieces, as well as any other measures needed to provide more support. In some cases, although only in quite severe situations, a CRR or CIR ratio may suggest that splitting is the best method for attaching an implant.<\/span>\u00a0<\/span><\/p>\n

There are typically three different parts to a replacement tooth.<\/span><\/p>\n

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  1. The implant, which goes into the jaw and fuses into the bone over time<\/span><\/li>\n
  2. The upper piece that secures the implant to the crown\u00a0<\/span><\/li>\n
  3. The crown, which is the strong tooth cap you will see in your mouth and use for biting and chewing.<\/span><\/li>\n<\/ol>\n

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    The two top pieces are usually attached at the same time after the jaw and implant have healed.<\/span><\/p>\n

    It takes a few hours for each procedure to be completed.<\/span><\/p>\n

    CRR and CIRs are important measures in planning a successful tooth implant.\u00a0<\/b><\/p>\n

    A specialist will be in charge of creating your tooth replacement plan and scheduling the procedure to provide you with one or more artificial tooth replacements. The usual method for <\/span>tooth replacement<\/span><\/a> is the screw-retained implant which is easy to fix if there are any problems over time. The other common method is cemented implant restoration.<\/span><\/p>\n

    Having dental implant restoration has advantages over <\/span>dentures<\/span><\/a> or living with missing teeth.\u00a0<\/span><\/p>\n

    These advantages include:<\/span><\/p>\n