Journal ArticleDOI
Dimensional ridge alterations following tooth extraction. An experimental study in the dog
TLDR
It was demonstrated that marked dimensional alterations occurred during the first 8 weeks following the extraction of mandibular premolars, and there was a marked osteoclastic activity resulting in resorption of the crestal region of both the buccal and the lingual bone wall.Abstract:
Objective: To study dimensional alterations of the alveolar ridge that occurred following tooth extraction as well as processes of bone modelling and remodelling associated with such change.
Material and Methods: Twelve mongrel dogs were included in the study. In both quadrants of the mandible incisions were made in the crevice region of the 3rd and 4th premolars. Minute buccal and lingual full thickness flaps were elevated. The four premolars were hemi-sected. The distal roots were removed. The extraction sites were covered with the mobilized gingival tissue. The extractions of the roots and the sacrifice of the dogs were staggered in such a manner that all dogs contributed with sockets representing 1, 2, 4 and 8 weeks of healing. The animals were sacrificed and tissue blocks containing the extraction socket were dissected, decalcified in EDTA, embedded in paraffin and cut in the buccal–lingual plane. The sections were stained in haematoxyline–eosine and examined in the microscope.
Results: It was demonstrated that marked dimensional alterations occurred during the first 8 weeks following the extraction of mandibular premolars. Thus, in this interval there was a marked osteoclastic activity resulting in resorption of the crestal region of both the buccal and the lingual bone wall. The reduction of the height of the walls was more pronounced at the buccal than at the lingual aspect of the extraction socket. The height reduction was accompanied by a “horizontal” bone loss that was caused by osteoclasts present in lacunae on the surface of both the buccal and the lingual bone wall.
Conclusions: The resorption of the buccal/lingual walls of the extraction site occurred in two overlapping phases. During phase 1, the bundle bone was resorbed and replaced with woven bone. Since the crest of the buccal bone wall was comprised solely of bundle this modelling resulted in substantial vertical reduction of the buccal crest. Phase 2 included resorption that occurred from the outer surfaces of both bone walls. The reason for this additional bone loss is presently not understood.read more
Citations
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Journal ArticleDOI
Dimensional ridge alterations following tooth extraction. An experimental study in the dog
Daniel Rothamel,Frank Schwarz,Monika Herten,Gabriela Chiriac,Nima Pakravan,Martin Sager,Jürgen C. Becker +6 more
TL;DR: It was concluded that the application of polylactide-stabilized RT does not improve the dimensional ridge alterations after tooth extraction and no statistically significant differences between test and control group after three or six months of healing.
Journal ArticleDOI
Ridge alterations following implant placement in fresh extraction sockets: an experimental study in the dog.
TL;DR: Marked dimensional alterations had occurred in the edentulous ridge after 3 months of healing following the extraction of the distal root of mandibular pre-molars and it is suggested that the resorption of the socket walls that occurs following tooth removal must be considered in conjunction with implant placement in fresh extraction sockets.
Journal ArticleDOI
A systematic review of post-extractional alveolar hard and soft tissue dimensional changes in humans.
TL;DR: Human re-entry studies showed horizontal bone loss of 29-63% and vertical bone Loss of 11-22% after 6 months following tooth extraction, which demonstrated rapid reductions in the first 3-6 months that was followed by gradual reductions in dimensions thereafter.
Journal ArticleDOI
Alveolar bone dimensional changes of post-extraction sockets in humans: a systematic review.
TL;DR: During the post-extraction healing period, the weighted mean changes as based on the data derived from the individual selected studies show the clinical loss in width to be greater than the loss in height, assessed both clinically as well as radiographically.
Journal ArticleDOI
Esthetic outcomes of immediate implant placements.
TL;DR: Immediate implant placements are believed to preserve soft and hard tissue form and contours, reduce the need for augmentation procedures, minimize surgical exposure of the patient, reduce treatment time and improve esthetic outcomes.
References
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Journal Article
A formaldehyde-glutaraldehyde fixative of high osmolality for use in electron-microscopy
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A formaldehyde - glutaraldehyde fixative of high osmolarity for use in electron microscopy
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Bone healing and soft tissue contour changes following single-tooth extraction: a clinical and radiographic 12-month prospective study.
TL;DR: It was demonstrated that major changes of an extraction site occurred during 1 year after tooth extraction, and preservation of alveolar bone volume following tooth extraction facilitates subsequent placement of dental implants and leads to an improved esthetic and functional prosthodontic result.
Journal ArticleDOI
The continuing reduction of the residual alveolar ridges in complete denture wearers: A mixed-longitudinal study covering 25 years
Journal ArticleDOI
Hard‐tissue alterations following immediate implant placement in extraction sites
TL;DR: It is documented that marginal gaps in buccal and palatal/lingual locations were resolved through new bone formation from the inside of the defects and substantial bone resorption from the outside of the ridge.