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Dr. Donald Clem DDS

United States of America

Donald S. Clem, DDS, is the recipient of numerous awards, including Outstanding Contributions to the Field of Periodontics by the California Society of Periodontists and the American Academy of Periodontology’s Gold Medal, the highest award the Academy can bestow. He is a past president of the American Academy of Periodontology Foundation, American Academy of Periodontology, and the American Board of Periodontology. Dr Clem has authored over 30 publications, including three textbook chapters, and lectures internationally on sedation, periodontal regeneration, dental implants, and bone healing. He maintains a full-time private practice limited to periodontics and dental implants in Orange County, California.

Events

  
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The 14th International Symposium on Periodontics and Restorative Dentistry (ISPRD)

9. Jun 2022 — 12. Jun 2022Boston Marriott Copley Place, Boston, MA, United States of America
Speakers: Tara Aghaloo, Edward P. Allen, Evanthia Anadioti, Wael Att, Vinay Bhide, Markus B. Blatz, Scotty Bolding, Lorenzo Breschi, Jeff Brucia, Daniel Buser, Luigi Canullo, Daniele Cardaropoli, Stephen J. Chu, Donald Clem, Christian Coachman, Lyndon F. Cooper, Daniel Cullum, Lee Culp, José Carlos Martins da Rosa, Sergio De Paoli, Marco Degidi, Nicholas Dello Russo, Serge Dibart, Joseph P. Fiorellini, Mauro Fradeani, Stuart J. Froum, David Garber, Maria L. Geisinger, William Giannobile, Luca Gobbato, Ueli Grunder, Galip Gürel, Chad Gwaltney, Christoph Hämmerle, Robert A. Horowitz, Marc Hürzeler, David Kim, Gregg Kinzer, Christopher Köttgen, Ina Köttgen, Purnima S. Kumar, Burton Langer, Lydia Legg, Pascal Magne, Kenneth A. Malament, Jay Malmquist, George Mandelaris, Pamela K. McClain, Michael K. McGuire, Mauro Merli, Konrad H. Meyenberg, Craig M. Misch, Julie A. Mitchell, Marc L. Nevins, Myron Nevins, Michael G. Newman, Miguel A. Ortiz, Jacinthe M. Paquette, Stefano Parma-Benfenati, Michael A. Pikos, Giulio Rasperini, Pamela S. Ray, Christopher R. Richardson, Isabella Rocchietta, Marisa Roncati, Marco Ronda, Paul S. Rosen, Maria Emanuel Ryan, Irena Sailer, Maurice Salama, David M. Sarver, Takeshi Sasaki, Todd Scheyer, Massimo Simion, Michael Sonick, Sergio Spinato, Dennis P. Tarnow, Lorenzo Tavelli, Douglas A. Terry, Tiziano Testori, Carlo Tinti, Istvan Urban, Hom-Lay Wang, Robert Winter, Giovanni Zucchelli
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Quintessence Publishing Co., Inc. USA

This author's journal articles

  
International Journal of Periodontics & Restorative Dentistry, 6/2022
Online OnlyDOI: 10.11607/prd.6124Pages e161-e174, Language: EnglishVelasquez, Diego / Araújo, Mauricio G / Clem, Donald S / Gunsolley, John C / Heard, Rick H / Janakievski, Jim / McClain, Pamela K / McGuire, Michael K / Misch, Craig M / Nevins, Marc / Pickering, Steve / Pope, Bryan / Richardson, Chris / Santarelli, Greg / Scheyer, E Todd / Schallhorn, Rachel / Toback, Gregory

A Prospective, Randomized, Controlled, Multicenter Evaluation of Extraction Socket Management Comparing a Wound Dressing and a Soft Tissue Substitute

Postextraction bone grafting and implant placement help preserve alveolar bone volume. Collagen wound dressings and soft tissue graft substitutes may help protect extraction socket bone grafts and provide better gingival contours. This randomized, controlled, multicenter, and double-blinded study was conducted to compare a control (wound dressing) and a test (soft tissue graft) substitute in nearly intact extraction sockets. Both test and control sockets were grafted with a xenogeneic bone graft. Graft containment, extraction socket soft tissue gap closure, gingival contour, and gingival thickness were examined over 16 weeks, at which time implants were placed. Healing was uneventful for both groups, and there was no significant difference (P < .05) between the times required to close the extraction socket soft tissue gap (~80% of sites closed by 8 weeks). Bone grafts were covered and contained longer in the test group (~4 weeks vs ~2 weeks), with less contour disruption out to 4 weeks; however, at implant placement, soft tissue contours in both groups were comparable, and soft tissue thicknesses were not significantly different.
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International Journal of Periodontics & Restorative Dentistry, 4/2019
DOI: 10.11607/prd.4158, PubMed ID (PMID): 31226185Pages 479-489, Language: EnglishClem, Donald / Gunsolley, John C.

Peri-implantitis Treatment Using Er:YAG Laser and Bone Grafting. A Prospective Consecutive Case Series Evaluation: 1 Year Posttherapy

An effective treatment regime for peri-implantitis (P-I) should include disinfection and regeneration of peri-implant tissues. Twenty consecutive patients exhibiting 23 P-I implants with 84 deep (≥ 6 mm) defects were treated using an Er:YAG laser for implant surface decontamination, removal of defect granulomatous tissues, and grafting therapy for bony defect resolution. Probing pocket defects (PPD) ≥ 6 mm (deep probing depths) before surgery were reduced on average to approximately 3.5 mm at 12 months. Probing depths 6 mm (shallow probing depths) remained stable (mean PPD 3.2 mm at 12 months). Radiographs indicated PPD reductions were achieved along with peri-implant defect fill.
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International Journal of Periodontics & Restorative Dentistry, 1/2015
DOI: 10.11607/prd.1888, PubMed ID (PMID): 25734712Pages 98-103, Language: EnglishSchallhorn, Rachel A. / McClain, Pamela K. / Charles, Allan / Clem, Donald / Newman, Michael G.

Evaluation of a Porcine Collagen Matrix Used to Augment Keratinized Tissue and Increase Soft Tissue Thickness Around Existing Dental Implants

Implant-supported prostheses often present with mucogingival deficiencies that may cause esthetic or hygienic issues. These issues may present as limited or no keratinized tissue, irregular soft tissue contour or concavity, and gray "showthrough" of the implant abutment and root forms. An interpositional soft tissue graft substitute that generates keratinized tissue and increases soft tissue thickness would be beneficial, as it would reduce donor site morbidity and be available in unlimited, off-the-shelf supply. Thirty patients were assessed as part of a multicenter, practice-based evaluation of the material. A xenogeneic collagen matrix was placed as an interpositional graft on the buccal aspect of implant sites; sites were reassessed at 6 months posttreatment. Results indicated that the collagen matrix increased tissue thickness and keratinized tissue around existing dental implants.
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International Journal of Periodontics & Restorative Dentistry, 3/2005
Pages 231-237, Language: EnglishCammack, Gerald V./Nevins, Myron/Clem, Donald S./Hatch, John P./Mellonig, James T.

Histologic Evaluation of Mineralized and Demineralized Freeze-Dried Bone Allograft for Ridge and Sinus Augmentations

The objective of this study was to quantify new bone formation from biopsies of demineralized freeze-dried bone allograft (DFDBA) and freeze-dried bone allograft (FDBA) following ridge and sinus augmentations. Ninety-three patients who received maxillary sinus or ridge augmentation grafts agreed to core biopsies of their grafts when the implants were placed. Samples ranged from 6 to 36 months postgrafting. These samples were sectioned, stained, and examined histomorphometrically. Seventy-two FDBA and 21 DFDBA samples were examined, and the mean percentages of new bone formed were 41.89% and 41.74%, respectively. There was no statistical difference, irrespective of graft site.
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The International Journal of Oral & Maxillofacial Implants, 4/2002
Pages 550-556, Language: EnglishLevine, Robert A. / Clem, Donald / Beagle, Jay R. / Ganeles, Jeffrey / Johnson, Peter / Solnit, Gary / Keller, G. William

Multicenter Retrospective Analysis of the Solid-Screw ITI Implant for Posterior Single-Tooth Replacements

Purpose: This report involves the retrospective analysis of ITI implants placed and/or restored by a group of 7 clinicians located throughout the United States (5 periodontists and 2 prosthodontists). Materials and Methods: Six hundred seventy-five posterior single-tooth implants were restored in 471 patients (average time of loading 21.30 months, with a range of 1 to 78 months). Three hundred seventy implants and 71 implants were placed in mandibular and maxillary molar sites, respectively, and 108 and 126 were placed in mandibular and maxillary premolar sites, respectively. Results: A cumulative survival rate of 99.1% was obtained for all sites (6 failures). The survival rates for individual sites were as follows: 98.4% mandibular molars, 100% maxillary molars, 100% mandibular premolars, and 100% maxillary premolars. "At-risk" implants (1 to 2 mm of radiographic bone loss) were noted at 5 sites. Discussion: Minimal restorative problems were found with either screw-retained (n = 71) or cemented restorations on solid abutments (n = 600); 80.3% of screw-retained and 98.2% of cemented restorations were free of complications, respectively. Patient satisfaction scores were high (97.4%) as determined by the Patient Satisfaction Questionnaire. Conclusion: The data suggest that solid-screw (4.1 or 4.8 mm wide) ITI implants can be a satisfactory choice for posterior single-tooth restorations.
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