Ridge Dimensions of the Edentulous Mandible in Posterior Sextants

Abstract

BH decreased from mesial to distal, whereas BW showed an increase. Sex showed a significant impact on BH, with males having on average a 2.8 mm greater height than females, but not on BW. Age did not significantly influence the dimensions of the residual bone crest.

CT-based dentulous mandibular alveolar ridge measurements as predictors of crown-to-implant ratio for short and extra short dental implants

“…Our data showed that BH dimensions were higher in males than in females, while BH dimensions decreased from premolar to molars. Similarly, a significant difference in bone height between males and females has been reported in the dentulous 1 , 2 , the edentulous 7 , and both types of individual (Table 8 ) 3 – 5 , 8 , 9 . On the other hand, Alrahaimi et al found no significant difference between males and females regarding distances from the alveolar crest to the superior position of the mandibular canal in a study on jaws with single missing teeth 6 .…”

“…Several authors measured bone width on different levels, from the dental crest to the edge of the alveolar canal (Table 7 ), and concurred that it increased gradually from the premolar through to the third molar region of the mandible, in both dentulous and edentulous mandibles 2 , 6 – 9 . Studies in edentulous subjects 6 , 7 found that BW was not influenced by sex or age. It is interesting to note that BW measurements taken at various heights in edentulous subjects were always compatible with the insertion of a standard-diameter dental implant, validating our method for calculating the C/I R. The BW in the edentulous is reportedly approximately half that of dentulous subjects, confirming the fundamental role of tooth loss in severe bone resorption.…”

“…The position and morphology of the inferior alveolar canal, and the dimension of the alveolar bone have been studied both in two-dimensional radiography and three-dimensional computed tomography. It has proved useful for examining whether a correlation exists between these measurements and other variables, such as sex and age 1 – 7 . Previous descriptive studies investigated the role of CT imaging in providing preoperative information in the oral and implant surgery setting too 8 , 9 .…”

Contour Changes Following Immediate Placement of Ultra-Wide Implants in Molar Extraction Sockets without Bone Grafting

“…This process reduces the horizontal and vertical dimensions of the edentulous ridge, but the buccal aspect is affected to a greater degree [ 3 , 9 , 10 ]. Consequently, a shorter and narrower ridge follows [ 11 , 12 ], and this effect contributes to a more palatal/lingual movement of the ridge [ 13 ]. Implant placement and survival may become less ideal because of these alterations [ 5 ].…”

Mandibular canal assessment in dentate and edentulous ridges of 400 Iraqi Arab and Kurdish populations using cone beam computed tomography

“…This condition is observed in this study where the distances from MC to the buccal and lingual alveolar crests (MC-BC, MC-LC) were consistently lower in the edentulous ridge compared to the dentate ridge across all teeth regions under investigation for both Arabs and Kurds. A few studies reported similar findings ( Bressan et al, 2017a , Bressan et al, 2017b , Park, 1999 ). Differences in MC-BC and MC-LC measurements of dentate ridge in different teeth regions were also diminished when the teeth were lost which were demonstrated by almost similar measurements of the edentulous ridge of all teeth regions.…”