AimThis critical appraisal attempts to answer the question: What is the best method of space maintenance (SM) following premature loss of a primary molar in children under 12 years old?MethodsA search to identify studies relevant to the PICO was conducted. Single case reports and studies prior to 1986 were excluded. The principles of GRADE were followed to appraise the evidence.Results20 studies were identified, which evaluated 2265 space maintainers (SMs). Two studies were graded high quality, four moderate, eight low, and six very low. All studies reported on longevity outcomes and most on adverse effects.ConclusionsThere was no strong evidence favouring a particular SM, the following recommendations were made: (a) strong recommendations: In cases where rubber dam cannot be used clinicians should not use Glass Fibre Reinforced Composite Resin (GFRCR) SMs. (b) Weak recommendations: Crown and Loop SMs are recommended for loss of primary first molars; GFRCR SMs (placed under rubber dam) are recommended for loss of primary second molars. Bilateral SMs may have questionable efficacy and their use where there is loss of multiple molars in the same quadrant should be weighed against the risk of unwanted tooth movements, loss of a removable SM or no space maintenance at all.

This paper describes different types of space maintainers and the clinical situations where they may be useful, for example, when primary teeth have been lost prematurely. It serves as a clinical guide for practitioners on the best types of space maintainers to use and on the clinical uses of space maintainers in preventing undesirable tooth movements and resulting loss of arch length.

Aims: This study aims to compare patients’ complaints and problems of wearing complete dentures.Methodology: The sample included 40 Iraqi patients who are wearing complete dentures from about five years ago. Theywere selected randomly with a age range between (55–65) years. The questions asked to the patients were listed accordingto the recent classification of post-insertion problems.Result: The results showed that the percentage of patient's complaint from adaptation problems (62.1%) was higher thanlooseness problems (61.3%) and discomfort problems (39.3%) as followed.Recommendation: Dentists need thorough knowledge of anatomy, physiology, pathology and psychology. The assessingof the psyche and emotions of patients is extremely complex long period study at the same patient will give the more aboutthis subject.