Changes of anterior crown height in patients with single implants - a more than 15-year follow-up study

• Objectives: The aim of this study was to measure and compare the long-term changes of clinical crown height in patients treated with single implant crowns with an adult populations of normal dentate persons. Methods: The test group comprised 23 patients, restored with altogether 27 single implant crowns in the anterior maxilla. At the inclusion, the mean age was 25.4 years (SD 10.0). The original master casts were stored after treatment, and the patients were recalled for study casts, on an average 15.8 years (SD 0.74 years) later. The control group comprised 141 dental students with a mean age of 22.9 years (SD 1.21) at inclusion. Study casts were made at inclusion and after 10 years (n-141) and after 20 years (n-60). Clinical crown height was measured for upper front teeth. The data was compared regarding clinical crown height and changes in height. Results: The results showed that implant clinical crowns were on average 0.6 mm (SD 1.04) longer than the contra lateral teeth (p<0.05). Central and lateral incisors showed in treated patients mucosal recession on an average of 0.4 mm +/- SD 0.53 (p<0.05) and 0.6 mm +/- SD 0.58 (p<0.01), respectively. In the control group, there was no change in mean clinical crown height during the 20 years follow-up period. However, obvious individual variations of changes could be found in this group, especially for women. During 20 years of follow-up, altogether 14% of measured teeth showed more than/equal to 1.0 mm increase and 10% showed more than/equal to 1.0 mm decrease of clinical crown height in the control group. Initially shorter teeth showed a trend (p<0.05-0.001) of more mucosal recession than longer teeth. Conclusion: Anterior teeth in single implant cases show a higher risk for mucosal recession than in control patients. Mean values of clinical crown height disguise significant individual variations of changes. To perform a risk evaluation for possible future mucosal recession, more recession can be anticipated for implant treated patients compared to untreated control persons and for women as compared to men.

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Klinisk medicin -- Odontologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Clinical Medicine -- Dentistry (hsv//eng)

Nyckelord

Anterior crown height

single implants

follow-up study

Publikations- och innehållstyp

vet (ämneskategori)

kon (ämneskategori)