Evaluation of peri-implant marginal tissues around tissue-level and bone-level implants in patients with a history of chronic periodontitis.
OBJECTIVE
To evaluate clinical and radiographic characteristics in peri-implant marginal tissues in patients with a history of chronic periodontitis, rehabilitated using tissue-level or bone-level implants.


MATERIAL AND METHODS
Using a split-mouth design, 20 patients with a history of chronic periodontitis were selected and received two different implants, tissue-level group (n = 20) and the bone-level group (n = 20). Peri-implant probing depth, relative peri-implant mucosal margin position, relative peri-implant clinical attachment level, peri-implant plaque index and peri-implant bleeding on probing were evaluated at prosthesis installation, 1, 3, 6, 12 and 24 months after implant loading. Radiographic marginal bone level was evaluated at implant insertion, prosthesis installation, 6 and 24 months after implant loading.


RESULTS
The mean difference of peri-implant marginal bone resorption from implant installation to 24 months in function was 0.75 ± 1.12 mm for the tissue-level group and 0.70 ± 0.72 mm for the bone-level group. No statistically significant difference was found between groups at all assessment periods for clinical and radiographic peri-implant evaluation.


CONCLUSION
Under a rigid supportive therapy, both approaches performed likewise regarding clinical and radiographic parameters for rehabilitation of patients with a history of chronic periodontitis.
['Vianna|Tiago T|TT|0000-0003-0234-255X', 'Taiete|Tiago|T|0000-0003-2173-4620', 'Casarin|Renato C V|RCV|', 'Giorgi|Maria C C|MCC|', 'Aguiar|Flávio Henrique B|FHB|', 'Silvério|Karina G|KG|', 'Nociti Júnior|Francisco H|FH|', 'Sallum|Enilson A|EA|', 'Casati|Márcio Z|MZ|']
D016301:Alveolar Bone Loss D055113:Chronic Periodontitis D015921:Dental Implants D003774:Dental Plaque Index D019094:Dental Prosthesis, Implant-Supported D006801:Humans
chronic periodontitis dental implants marginal bone loss platform switching randomized clinical trial