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Literature Update Sep - Oct 2010

Acta Odontologica Scandinavica

Vol. 68 No. 5 (September 2010)

Zhu Y, Xiao L, Shen D, Hao Y. Competition between yogurt probiotics and periodontal pathogens in vitro. Acta Odontol Scand 2010;68(5):261-268.

Four probiotic bacterial species (L bulgaricus,  S thermophilus,  L acidophilus and  Bifidobacterium) were isolated from yogurt to assess the antimicrobial activity versus various periodontal pathogens. All periodontal pathogens were inhibited by fresh yogurt but antimicrobial activity  was lower with heat-treated yogurt. However, neither yogurt inhibited the ‘protective’ bacteria  S sanguinis. Competition between the bacteria depended on the sequence of inoculation, and antimicrobial properties were reduced if both probiotic bacteria and periodontal pathogens were inoculated simultaneously. Probiotic yogurt and its bacteria can therefore inhibit certain periodontal pathogens but do not affect periodontal protective bacteria.

Clinical Implant Dentistry and Related Research

Vol. 12 No. 3 (September 2010)

Safii SH, Palmer RM, Wilson RF. Risk of implant failure and marginal bone loss in subjects with a history of periodontitis: a systematic review and meta-analysis. Clin Implant Dent Relat Res 2010;12(3):165-174.

A literature search was conducted for clinical studies comparing periodontal/peri-implant variables between healthy subjects and those with periodontitis. A total of 17 potential studies were identified, of which six compared implant treatment in periodontally compromised and periodontally healthy subjects. Meta-analysis of implant survival was possible for five studies and meta-analysis of peri-implant bone loss was possible for four studies. Periodontally healthy patients showed a significantly greater odds ratio for implant survival, while marginal bone loss was significantly greater in subjects with periodontitis. The risk of implant failure and marginal bone loss is therefore greater in patients with periodontitis.

Shabestari GO, Shayesteh YS, Khojasteh A, Alikhasi M, Moslemi N, Aminian A, Mazaeli R, Eslami B, Treister NS.  Implant placement in patients with oral bisphosphonate therapy: a case series. Clin Implant Dent Relat Res 2010;12(3):175-180.

A total of 21 patients with osteoporosis and who  were receiving bisphosphonate therapy received 46 implants, which were evaluated for probing depth, mobility, thread exposure and bleeding on probing. No signs of peri-implantitis were observed in any of the patients. Time  of bisphosphonate therapy relative to implant placement, implant location, type of prosthesis and opposing dentition had no significant influence. Bisphosphonate therapy before or after implant placement therefore did not jeopardize osseointegration or clinical or radiographic outcomes.