![]() 12-14,16 Satisfactory results have also been demonstrated in both full-arch fixed bridges and for overdentures in the mandible 14,17,18 and in the maxilla. ![]() 15 Studies indicate favorable long-term clinical results 9,10,12-14 where a narrow implant is used in single-tooth applications as well as the use of narrow implants in fixed partial dentures. Narrow-diameter implants have been shown to be successful in these areas 5-15 with no evidence of increased marginal bone loss compared to standard diameter implants. 3-5 The distance between teeth for using a 3-mm implant should be deemed by the clinician to have a bone width suitable for this type of implant. Studies of the tooth-to-implant spacing have indicated that the implant-to-tooth distance needs to be at least 1.5 mm to predictably maintain the interdental papillae in anterior esthetic areas. Placement of dental implants in these sites can be challenging due to proximity of adjacent structures and/or limited availability of bone volume. In most cases, missing mandibular central and lateral and maxillary lateral incisor sites require a reduced-diameter implant to accommodate the limited horizontal space available. 2 With the availability of small-diameter implants less than 3.5 mm, such as the Astra Tech OsseoSpeed™ 3.0 S implant (Astra Tech, ), these narrow sites can be more readily managed and esthetic outcomes successfully achieved, often eliminating the need for bone augmentation or orthodontic tooth movement. However, a bone-augmentation procedure can sometimes be associated with complications, and if this procedure can be avoided it would be beneficial in many aspects no extraoral donor site is needed, it will cost less, and less surgical and healing time is needed, at least in comparison to a two-stage augmentation procedure. In cases of insufficient bone volume, procedures such as guided bone regeneration and block grafting are used to overcome the problem. However, this procedure is often time-consuming and costly for the patient. 1 Procedures to increase horizontal interdental space, such as orthodontic tooth movement, could be advocated before implant installation. In cases of congenitally missing maxillary laterals or mandibular incisors, the clinical situation can be severe because these teeth already have the smallest mesio-distal width. In some cases, the interdental space can be limited due to drifting or migration of the remaining teeth the resulting space after orthodontic tooth movement can be limited or teeth can be congenitally missing, potentially resulting in the loss of interdental space. However, clinical situations with limited or reduced horizontal space continues to be a challenge. Through continued product advancements, dental implants are now a viable solution for almost all edentulous scenarios. ![]() Implant dentistry continues to impact the quality of care for patients with missing teeth. Reduced-diameter implants help manage narrow edentulous spaces.
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