This study evaluates the effects of three kinds of periodontal surgery using statistical analyses of histological and immunohistochemical indices. Dehiscence defects were made on roots of maxillary teeth in monkeys. Surgically exposed roots were untreated, etched with EDTA, or treated with Emdogain® after EDTA etching. Paraffin sections were stained with hematoxylin and eosin or immunostained f...

AIM To compare the efficacy of sodium hypochlorite (NaOCl) used at different concentrations and working times for removing necrotic periodontal ligament (PDL) from delayed replanted teeth and to observe the effects of NaOCl on surface structure and microhardness of cementum. METHODOLOGY A total of 88 healthy premolars with a single root extracted for orthodontic purposes were selected and kep...

Cementum forms the interface between root dentin and periodontal ligament through which periodontal connective tissue is attached to root surfaces. We have examined how cementum components influence the biological activities of gingival fibroblasts. Cementum was harvested from freshly extracted human teeth and extracted sequentially with 0.5 mol/L acetic acid, 4 mol/L guanidine-0.5 mol/L EDTA, ...

Animal studies have shown that a periodontal ligament may be produced around a titanium implant when it is in contact with fractured and retained roots. Formation of cementum and attachment connective tissue around titanium implants confirms that cementum progenitor cells are located in the periodontal ligament, since cementum and periodontal ligament are present at the implant-root interface, ...

Injury to an immature permanent tooth may result in cessation of dentine deposition and root maturation leaving an open root apex and thin dentinal walls that are prone to fracture. Endodontic treatment is often complicated and protracted with an uncertain prognosis frequently resulting in premature tooth loss. Postnatal stem cells, which are capable of self-renewal, proliferation and different...

PURPOSE To evaluate CAD/CAM conic crowns to obtain a reversible and predictable retention in implant-supported prostheses. MATERIALS AND METHODS Five 1- to 8-degree CAD/CAM abutments and their respective copings (n = 40) were designed and manufactured to measure the retention strength (in N) on a Zwick/Roell testing frame. RESULTS The mean retention strength values found, in descending orde...

The objective of this study was to analyse the stress distribution in periodontal ligament and tooth structure a cementum-reinforced tooth, dentine-reinforced an immature during orthodontic loads using finite element analysis. A model maxillary incisor its supporting tissues developed. root segmented into two parts: part that represented state apical tissue formed after regenerative endodontics...

Dental Calculus Image Based on Optical Coherence Tomography Yao-Sheng Hsieh, Yi-Ching Ho, Shyh-Yuan Lee, Ching-Cheng Chuang, Chun-Yang Wang, and ChiaWei Sun 1 Department of Photonics, National Chiao-Tung University, Hsinchu, Taiwan, R.O.C. 2 School of Dentistry, National Yang-Ming University, Taipei, Taiwan, R.O.C. 3 Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, R...

Randomised trials can provide excellent evidence of treatment benefit in medicine. Over the last 50 years, they have been cemented in the regulatory requirements for the approval of new treatments. Randomised trials make up a large and seemingly high-quality proportion of the medical evidence-base. However, it has also been acknowledged that a distorted evidence-base places a severe limitation ...