JOURNAL ARTICLE
OBSERVATIONAL STUDY
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Four years survival and marginal bone loss of implants in patients with Down syndrome and cerebral palsy.

OBJECTIVES: To evaluate implant survival rate and marginal bone loss (MBL) after 4 years in patients with Down syndrome and cerebral palsy, compared with a healthy control group.

MATERIAL AND METHODS: The case group comprises 102 implants in 19 patients (71 cerebral palsy, 21 Down syndrome), and the control group comprises 70 implants in 22 healthy patients. One implant per patient was selected (n = 41 implants) to take clustering effects into account. MBL was measured using two panoramic radiographs (after surgery and 4 years later). Lagervall-Jansson's Index was used. Statistics used are chi-squared test and Haberman's post hoc test. p Value is significant at <0.05.

RESULTS: MBL was significantly higher in the cases in all samples (p < 0.001) and when one implant was selected per patient (p < 0.05). More implants were lost in the cases (p < 0.01), especially those with a higher MBL (p < 0.01). MBL (p < 0.05) and implant loss (p < 0.01) increased with age in the cases. The three-unit fixed dental prosthesis (FDP) showed higher MBL (p < 0.05). Down syndrome had a higher MBL than cerebral palsy (entire sample p < 0.0001, one implant per patient p < 0.05). All patients with Down syndrome saw some damage to bone support (entire sample p < 0.0001; one implant per patient p < 0.05). Implant loss occurred only in Down syndrome (p < 0.00001).

CONCLUSIONS: MBL and implant loss 4 years after placement are higher in neuropsychiatric disabilities. Down syndrome has a higher risk of MBL and implant loss; therefore, special precautions should be taken when deciding on treatment for these patients.

CLINICAL RELEVANCE: As a consequence of this pilot study, professionals should be very cautious in placing implants in patients with Down syndrome.

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