Publication date: Available online 12 June 2016
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Nicole Ernst, Claudia Sachse, Jan D. Raguse, Carmen Stromberger., Katja Nelson, Susanne Nahles
AimThe aim of the present study was to evaluate changes in the marginal bone level of dental implants in irradiated and non-irradiated patients, and to identify possible influential factors.Material and MethodsA total of 36 patients with 194 implants were involved in the study (7 female and 29 male). The mean age of the patients was 65.8 (39–90 years). In all patients a squamous cell carcinoma in the floor of mouth involving the mandible or tongue was surgically removed. In 17 patients adjuvant radiochemotherapy was completed a minimum of 6 months before implant placement. Mean crestal bone changes using standardized orthopantomographies were evaluated. The Spearman rank- order correlation coefficient and Mann-Whitney U test were used to determine correlations between bone crestal changes and age, gender, radiation therapy (yes/no), augmentation (yes/no), and type of superstructure.ResultsA total of 194 implants were placed: 73 in the maxilla and 121 in the mandible. The mean amount of peri-implant bone loss was 1 mm mesial and 0.9 mm distal after 1 year, and 1.4 mm mesial and 1.3 mm distal after 3 years. During the observation period, four implants were lost. The overall success rate was 98.4% (maxilla 100%, mandible 96.7%). There was no significant difference in changes in the bone level according to age, gender, the prosthetic superstructure, or the augmentation procedure (yes/no). Radiation therapy was found to have an impact on crestal bone loss.ConclusionThe present study revealed the high success rate of dental implants after 3 years. Peri-implant crestal bone loss was comparable to that in non-tumor patients. The mean amount of crestal bone change in irradiated patients was twice as high as that in non-irradiated patients.
Source:Journal of Oral and Maxillofacial Surgery
Author(s): Nicole Ernst, Claudia Sachse, Jan D. Raguse, Carmen Stromberger., Katja Nelson, Susanne Nahles
AimThe aim of the present study was to evaluate changes in the marginal bone level of dental implants in irradiated and non-irradiated patients, and to identify possible influential factors.Material and MethodsA total of 36 patients with 194 implants were involved in the study (7 female and 29 male). The mean age of the patients was 65.8 (39–90 years). In all patients a squamous cell carcinoma in the floor of mouth involving the mandible or tongue was surgically removed. In 17 patients adjuvant radiochemotherapy was completed a minimum of 6 months before implant placement. Mean crestal bone changes using standardized orthopantomographies were evaluated. The Spearman rank- order correlation coefficient and Mann-Whitney U test were used to determine correlations between bone crestal changes and age, gender, radiation therapy (yes/no), augmentation (yes/no), and type of superstructure.ResultsA total of 194 implants were placed: 73 in the maxilla and 121 in the mandible. The mean amount of peri-implant bone loss was 1 mm mesial and 0.9 mm distal after 1 year, and 1.4 mm mesial and 1.3 mm distal after 3 years. During the observation period, four implants were lost. The overall success rate was 98.4% (maxilla 100%, mandible 96.7%). There was no significant difference in changes in the bone level according to age, gender, the prosthetic superstructure, or the augmentation procedure (yes/no). Radiation therapy was found to have an impact on crestal bone loss.ConclusionThe present study revealed the high success rate of dental implants after 3 years. Peri-implant crestal bone loss was comparable to that in non-tumor patients. The mean amount of crestal bone change in irradiated patients was twice as high as that in non-irradiated patients.
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