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Your search keyword '"Hao, Jia"' showing total 11 results
Start Over Author "Hao, Jia" Journal clinical oral implants research
11 results on '"Hao, Jia"'

9. Regeneration of rabbit calvarial defects using biphasic calcium phosphate and a strontium hydroxyapatite-containing collagen membrane.

Author

Kitayama, Shuzo, Wong, Lok O., Ma, Li, Hao, Jia, Kasugai, Shohei, Lang, Niklaus P., and Mattheos, Nikos

Subjects
GUIDED bone regeneration, TRAUMATIC bone defects, CALCIUM phosphate, STRONTIUM, HYDROXYAPATITE, COLLAGEN, LABORATORY rats
Abstract

Objectives Biphasic calcium phosphate ( BCP) composed of 10% hydroxyapatite ( HA) and 90% beta-tricalcium phosphate has been developed. Recently, a strontium hydroxyapatite-containing collagen membrane ( Sr) was shown to stimulate early bone formation in rat calvarial defects at 4 weeks postoperatively, as compared with a cross-linked collagen membrane, for guided bone regeneration ( GBR). The objective of this study was to evaluate these novel biomaterials for GBR in relation to a non-cross-linked collagen membrane ( BG) and deproteinized bovine bone mineral ( BO). Materials and methods Twenty New Zealand rabbits were used in this study. Four defects of 7 mm in diameter were created in each rabbit, and three of the defects were treated with BG/ BO, Sr/ BO, and Sr/ BCP. Ten rabbits were sacrificed at 12 and 24 weeks, respectively. Histological and histomorphometric analyses were conducted. Volumetric densities of mineralized new bone ( MNB), bone marrow ( BM), residual grafting material ( RG), and non-mineralized connective tissue ( NCT) were determined for each group. Results After 12 weeks, Sr/ BCP yielded more MNB than BG/ BO and Sr/ BO with no significant difference among the three groups. After 24 weeks, however, Sr/ BCP demonstrated significantly more MNB than BG/ BO and Sr/ BO. Both after 12 and 24 weeks, Sr/ BCP showed significantly less RG than BG/ BO and Sr/ BO. There was a significant increase in MNB in Sr/ BCP from 12 to 24 weeks. Conclusions In defects grafted with BCP, more MNB was formed while less RG remained, than in defects grafted with BO. The Sr membrane was as effective as BG when comparing Sr/ BO with BG/ BO. [ABSTRACT FROM AUTHOR]

Published
2016
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11. Residual ridge dimensions at edentulous maxillary first molar sites and periodontal bone loss among two ethnic cohorts seeking tooth replacement

Author

Prashant Shirke, Niklaus P. Lang, Nikos Mattheos, Anson C.M. Chau, Jia Hao, Aneesha Acharya, Acharya, Aneesha, Hao, Jia, Mattheos, Nikos, Chau, Anson, Shirke, Prashant, and Lang, Niklaus P

Subjects
Adult, Male, China, Alveolar Bone Loss, India, Dentistry, Mandibular first molar, Cohort Studies, Tooth Loss, Sex Factors, Periodontal Attachment Loss, Alveolar Process, Maxilla, Alveolar ridge, Tooth loss, medicine, Maxillary first molar, Humans, sinus floor evaluation, Sinus (anatomy), Dental alveolus, Aged, Dental Implants, Orthodontics, business.industry, Jaw, Edentulous, Partially, computed tomography, Cone-Beam Computed Tomography, Maxillary Sinus, Middle Aged, Molar, Nasal Mucosa, Cross-Sectional Studies, medicine.anatomical_structure, dental inplant, Ridge (meteorology), Hong Kong, Female, Crest, Periodontal Index, Oral Surgery, medicine.symptom, business
Abstract

Objectives: To study residual ridge dimensions at edentulous first molar sites in relation to periodontal bone loss among cohorts of partially edentulous Asian Indian and Hong Kong Chinese subjects seeking tooth replacement. Materials and methods: A total of 628 edentulous maxillary first molar sites were analyzed on Cone Beam Computed Tomography scans of 225 Asian Indian (I) and 232 Hong Kong Chinese (C) partially edentulous adults seeking tooth replacement. Age, ethnicity, gender, total tooth loss, the presence or absence of adjacent teeth, categories of periodontal status defined according to radiographic alveolar bone loss (P0: periodontal health, P1: incipient to moderate disease, P2: severe periodontal disease) and sinus membrane abnormalities were noted. Alveolar ridge height (RH), widths at 1 and 3 mm from crest (RW1; RW3), and relative position of the bone crest (RR) were measured. Results: Prevalence of P2 status was most frequent in both cohorts(C: 50.4% I: 49.2%). P2 had lowest ridge heights; 13.1% C P2 and 14% I P2 had RH < 2 mm. Sites with both RH < 8 mm and RW1 < 6 mm occurred at 59% C P2 and 68% I P2. Sinus membrane abnormalities were most frequent in P2. Periodontal status and sinus membrane abnormality increased the odds of RH < 5 mm and RH < 8 mm more than 2-fold; additionally, gender and ethnicity significantly impacted RH < 8 mm. Gender and adjacent tooth status significantly affected RW1. Conclusion: Incident advanced periodontal disease was common among Asian Indian and Hong Kong Chinese subjects seeking tooth replacement and associated with lower available bone heights. Ethnicity, gender, sinus membrane thickening affected available bone height in the subsinus region, while the presence of adjacent teeth-and age-affected residual ridge width. Refereed/Peer-reviewed

Published
2013

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