1. Narrowing down the evidence
Narrow diameter implants (NDIs) are relatively new and so the evaluation of the long-term survival, complications, peri-implant conditions, marginal bone loss, and patient satisfaction of fixed dental prostheses supported by them is important. This study had a mean follow-up time of 10.1 years of relevant patients with implants in the posterior jaws. Implant survival, hardware complication, a range of periodontal measurements including marginal bone loss (MBL), and patient satisfaction were evaluated in 67 patients with 98 NDIs (premolar site: 81, molar site: 17, single crowns: 33, splinted restorations: 65). The overall implant survival rates were 96.9% at implant level and 97.0% at patient level. The most common hardware complication was veneer chipping (18.4% implant level: 19.4% patient level). The average MBL was 1.19 mm (implant level) and 1.15 mm (patient level). Eight implants (8.5%) and six patients (9.2%) were diagnosed with peri-implantitis. Fifty-eight patients (89.2%) were satisfied with the aesthetics of the restorations and 55 patients (84.6%) with their function. Narrow diameter implants could be a predictable treatment option in the long term.

Shi JY et al. Long-term outcomes of narrow diameter implants in posterior jaws: A retrospective study with at least 8-year follow-up. Clin Oral Implants Res 2017 Aug 28.

Q Referring to the ‘implant level’ statistics for implant survival rates, veneer chipping and marginal bone loss, which is the correct sequence of results?
A 96.9%, 18.4%, 1.19 mm
B 97%, 19.4%, 1.15 mm
C 18.4%, 96.9%, 1.19 mm
D 97%, 97%, 1.15 mm

  1. Implantitis and systemic health
An investigation observed 22,009 adult patients (average age 48.5 years) over a 3-year period to provide an insight into the prevalence of periodontitis, dental caries and peri-implant pathology and to make comparisons between healthy patients and those with systemic conditions. The prevalence rate of periodontitis, dental caries and peri-implant pathology was 17.6%, 36.6% and 13.9%, respectively. The systemic conditions showed diabetes and HIV+ as risk indicators for periodontitis; cardiovascular conditions, diabetes and neurologic conditions as risk indicators for dental caries; and smoking habits as a risk indicator for all three oral diseases. If the exposure to the systemic condition was prevented then an estimated potential reduction of the following was calculated: 12.2% of periodontitis, and 4.3% of dental caries cases. In terms of risk factors however, the prevention of exposure to smoking alone would result in a potential reduction of 37%, 7%, and 39% of periodontitis, dental caries, and peri-implant pathology cases, respectively.

de Araujo Nobre M, Malo P. Prevalence of periodontitis, dental caries, and peri-implant pathology and their relation with systemic status and smoking habits: Results of an open-cohort study with 22,009 patients in a private rehabilitation center. J Dent 2017 Jul 25.

Q The prevention/removal of one risk factor would reduce 37%, 7%, and 39% of periodontitis, dental caries, and peri-implant pathology cases respectively. Which is it?
A Cardiovascular conditions
B Diabetes
C Smoking