Skip to main content

Table 2 Clinical studies included

From: To what extent residual alveolar ridge can be preserved by implant? A systematic review

  Patients Intervention Follow-up Outcome Study
Reference No. Agea No. of implants Position Supra-structure   Change Declarations
(DAVIS et al. 1999) [17] 44 61.2 NG Symphyseal Fixed 6.6 Ya VBH (−.8 to +3.3 mm) R
(Powers et al. 1994) [32] 146 52 NG TMI Fixed 18–51 M BF (+2 to 9 mm) R
(Adell et al. 1981) [58] 410 53 2768 NG Removable bridges 5–9 Y BR (+) R
(Mericske-Stern et al. 2002) [35] 41 61.2 4–6 Maxillary Removable overdentures 4.1 Ya BD (+) Associated with radiographically visible decrease of the crestal bone. P
(Kwakman et al. 1997) [31] 36 60 NG TMI Denture with cantilever extension 2.3 Ya BF (+) R
(Sennerby et al. 1988) [72] 41 51.3 NG Symphyseal Oerdenture 7.1 Ya BR (−) Implant bony area vs CD R
(Friberg et al. 2000) [20] 49 63 247 NG Fixed prosthesis 8 Ya BF (+) At two most distal implants R
(Adell et al. 1986) [19] 16 53 95 Maxillomandibular Removable bridge 3 Ya BR (+) Indicating a successive load-related remodeling P
(Kordatzis et al. 2003) [74] 150 NG 300 Symphyseal Bar overdenture 5 Ya BR (−1 mm)a Less bone atrophy with OD vs CD. R
(Woven & Gotfredsen 1998) [78] 22 65 NG Symphyseal Overdentures 5 Ya BF (+)
BR (−)
Function related BF vs physiologic age-related BR P
(Wright et al. 2002) [73] 44 53 Y, for overdenture and 64 Y for the fixed prosthesis NG NG Overdentures and fixed prostheses 7.5 Ya BR (−0.5 mm)a BF (+0.5 mm)a OD and FD, respectively R
(Shaarawy & Aboelross 2013) [92] 14 58 14 + 28 Symphyseal and 2 in the first molar area Overdenture 1 Y BD (+) Incisal reduction of BD followed by gradual increase in BD P
(Taylor 1989) [21] 1 50 Y (not a mean) 5 NG Fixed 32 M VBH (3 mm) CR
(Oikarinen & Siirila 1992) [60] 1 41 Y 6 NG Fixed 8 Ya VBH (+) Nearly the doubled new BF CR
(Betts et al. 1993) [18] 19 NG NG TMI Fixed 53 M VBH (+1.8 mm)a In the saddle area and the most distal screw R
(Dhima et al. 2013) [33] 81 NG NG NG Fixed 9a BF (+0.94 mm)a R
(Mosnegutu et al. 2015) [81] 82 NG NG NG Overdenture 10.5 Ya BR (±) No relevant posterior bone atrophy after loading P
(Cooper et al. 2008) [79] 59 NG 118 Parasymphyseal Overdenture 60 M BF (+) P
  1. aAverage
  2. NG not given, TMI transmandibular implant, Y year, M month, BF bone formation, VBH vertical bone height, BR bone radiopacity, BD bone density, BR bone resorption, CD complete denture, OD overdenture, FD fixed denture, R retrospective, P prospective, CR case report, (+) increase, () decrease, (±) neutral