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Risto-Pekka Happonen

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Päivi Jääsaari; Marjatta Nyström; Juha Peltonen; Sirkku Peltonen; Vivian Visnapuu; Risto-Pekka Happonen
Dental age in patients with neurofibromatosis 1.
Vivian Visnapuu; Juha Peltonen; Sirkku Peltonen; Tapio Tammisalo; Risto-Pekka Happonen
Radiographic findings in the jaws of patients with neurofibromatosis 1.
Eeva-Mari Jouhilahti; Heikki Aho; Risto-Pekka Happonen; Sirkku Peltonen; Tero Soukka; Vivian Visnapuu; Juha Peltonen
Oral soft tissue alterations in patients with neurofibromatosis.

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2012: Päivi Jääsaari; Marjatta Nyström; Juha Peltonen; Sirkku Peltonen; Vivian Visnapuu; Risto-Pekka Happonen
Dental age in patients with neurofibromatosis 1.
European journal of oral sciences 2012;120(6):549-52.
2012: Vivian Visnapuu; Juha Peltonen; Sirkku Peltonen; Tapio Tammisalo; Risto-Pekka Happonen
Radiographic findings in the jaws of patients with neurofibromatosis 1.
Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons 2012;70(6):1351-7.
2012: Eeva-Mari Jouhilahti; Heikki Aho; Risto-Pekka Happonen; Sirkku Peltonen; Tero Soukka; Vivian Visnapuu; Juha Peltonen
Oral soft tissue alterations in patients with neurofibromatosis.
Clinical oral investigations 2012;16(2):551-8.
2011: Eetu Heervä; Sirkku Peltonen; Pertti Pirttiniemi; Risto-Pekka Happonen; Vivian Visnapuu; Juha Peltonen
Short mandible, maxilla and cranial base are common in patients with neurofibromatosis 1.
European journal of oral sciences 2011;119(2):121-7.
2011: Vivian Visnapuu; Kaisu Pienihäkkinen; Sirkku Peltonen; Risto-Pekka Happonen; Juha Peltonen
Neurofibromatosis 1 and dental caries.
Clinical oral investigations 2011;15(1):119-21.
2010: Jana M Rieger; Judith A Lam Tang; Jeffrey Harris; Hadi Seikaly; Johan Wolfaardt; Ricarda Glaum; Rainer Schmelzeisen; Daniel Buchbinder; Adam Jacobson; Cathy L. Lazarus; Erika Markowitz; Devin Okay; Mark L Urken; Kalle Aitasalo; Risto-Pekka Happonen; Ilpo Kinnunen; Juhani Laine; Tero Soukka
Survey of current functional outcomes assessment practices in patients with head and neck cancer: initial project of the head and neck research network.
Journal of otolaryngology - head & neck surgery = Le Journal d'oto-rhino-laryngologie et de chirurgie cervico-faciale 2010;39(5):523-31.
2010: Lotta Alivuotila; Jussi Hakokari; Vivian Visnapuu; Anna-Maija Korpijaakko-Huuhka; Olli Aaltonen; Risto-Pekka Happonen; Sirkku Peltonen; Juha Peltonen
Speech characteristics in neurofibromatosis type 1.
American journal of medical genetics. Part A 2010;152A(1):42-51.
2010: Juha-Pertti Laaksonen; Jana Rieger; Risto-Pekka Happonen; Jeffrey Harris; Hadi Seikaly
Speech after radial forearm free flap reconstruction of the tongue: a longitudinal acoustic study of vowel and diphthong sounds.
Clinical linguistics & phonetics 2010;24(1):41-54.
2009: Matti Niemi; Juha-Pertti Laaksonen; Heli Forssell; Satu Jääskeläinen; Olli Aaltonen; Risto-Pekka Happonen
Acoustic and neurophysiologic observations related to lingual nerve impairment.
International journal of oral and maxillofacial surgery 2009;38(7):758-65.
2008: H Paldan; Sami Areva; Teemu Tirri; Timo Peltola; T C Lindholm; Lippo V J Lassila; Lauri J Pelliniemi; Risto-Pekka Happonen; Timo Närhi
Soft tissue attachment on sol-gel-treated titanium implants in vivo.
Journal of materials science. Materials in medicine 2008;19(3):1283-90.
2007: Jaana Rautava; Marjaana Luukkaa; Kristiina Heikinheimo; Jouni Alin; Reidar Grenman; Risto-Pekka Happonen
Squamous cell carcinomas arising from different types of oral epithelia differ in their tumor and patient characteristics and survival.
Oral oncology 2007;43(9):911-9.
2007: S Rossi; Niko Moritz; Teemu Tirri; Timo Peltola; Sami Areva; Mika Jokinen; Risto-Pekka Happonen; Timo Närhi
Comparison between sol-gel-derived anatase- and rutile-structured TiO2 coatings in soft-tissue environment.
Journal of biomedical materials research. Part A 2007;82(4):965-74.
2007: Vivian Visnapuu; Sirkku Peltonen; Tero Ellilä; Eero Kerosuo; Kalervo Väänänen; Risto-Pekka Happonen; Juha Peltonen
Periapical cemental dysplasia is common in women with NF1.
European journal of medical genetics 2007;50(4):274-80.
2006: Matti Niemi; Juha-Pertti Laaksonen; S Ojala; Olli Aaltonen; Risto-Pekka Happonen
Effects of transitory lingual nerve impairment on speech: an acoustic study of sibilant sound /s/.
International journal of oral and maxillofacial surgery 2006;35(10):920-3.
2006: Lars Fabricius; Gunnar Dahlén; Göran Sundqvist; Risto-Pekka Happonen; Ake J R Möller
Influence of residual bacteria on periapical tissue healing after chemomechanical treatment and root filling of experimentally infected monkey teeth.
European journal of oral sciences 2006;114(4):278-85.
2006: Matti Niemi; Juha-Pertti Laaksonen; Timo Peltomäki; Jukka Kurimo; Olli Aaltonen; Risto-Pekka Happonen
Acoustic comparison of vowel sounds produced before and after orthognathic surgery for mandibular advancement.
Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons 2006;64(6):910-6.
2006: Arja Muhonen; Anna-Marja Säämänen; Timo Peltomäki; Risto-Pekka Happonen
The effect of irradiation and hyperbaric oxygenation (HBO) on extracellular matrix of the condylar cartilage after mandibular distraction osteogenesis in the rabbit.
International journal of oral and maxillofacial surgery 2006;35(1):79-87.
2005: Reijo J Linnola; Oliver Findl; Boris Hermann; Harald Sattmann; Angelika Unterhuber; Risto-Pekka Happonen; Wolfgang Drexler
Intraocular lens-capsular bag imaging with ultrahigh-resolution optical coherence tomography Pseudophakic human autopsy eyes.
Journal of cataract and refractive surgery 2005;31(4):818-23.
2005: Kimmo Vähätalo; Juha-Pertti Laaksonen; Henna Tamminen; Olli Aaltonen; Risto-Pekka Happonen
Effects of genioglossal muscle advancement on speech: an acoustic study of vowel sounds.
Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery 2005;132(4):636-40.
2005: Dunja Kanto; Matti K Salo; Risto-Pekka Happonen; Tero Vahlberg; Jussi Kanto
Tramadol premedication in operative extraction of the mandibular third molar: a placebo-controlled crossover study.
Acta odontologica Scandinavica 2005;63(1):43-9.
2004: Ake J R Möller; Lars Fabricius; Gunnar Dahlén; Göran Sundqvist; Risto-Pekka Happonen
Apical periodontitis development and bacterial response to endodontic treatment. Experimental root canal infections in monkeys with selected bacterial strains.
European journal of oral sciences 2004;112(3):207-15.
2004: Tia Turunen; Juha Peltola; Antti Yli-Urpo; Risto-Pekka Happonen
Bioactive glass granules as a bone adjunctive material in maxillary sinus floor augmentation.
Clinical oral implants research 2004;15(2):135-41.
2004: Arja Muhonen; Merja Haaparanta; Tove Grönroos; J Bergman; Juhani Knuuti; Susanna Hinkka; Risto-Pekka Happonen
Osteoblastic activity and neoangiogenesis in distracted bone of irradiated rabbit mandible with or without hyperbaric oxygen treatment.
International journal of oral and maxillofacial surgery 2004;33(2):173-8.
2004: Matti Niemi; Juha-Pertti Laaksonen; Olli Aaltonen; Risto-Pekka Happonen
Effects of transitory lingual nerve impairment on speech: an acoustic study of diphthong sounds.
Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons 2004;62(1):44-51.
2003: Jaana Rautava; Tero Soukka; Pirjo Inki; Riitta Leimola-Virtanen; Irma Saloniemi; Risto-Pekka Happonen; Kristiina Heikinheimo
CD44v6 in developing, dysplastic and malignant oral epithelia.
Oral oncology 2003;39(4):373-9.
2003: Jaana Rautava; Tero Soukka; Kristiina Heikinheimo; P J Miettinen; Risto-Pekka Happonen; Panu M Jaakkola
Different mechanisms of syndecan-1 activation through a fibroblast-growth-factor-inducible response element (FiRE) in mucosal and cutaneous wounds.
Journal of dental research 2003;82(5):382-7.
2003: Shigeto Kawashima; Timo Peltomäki; Hideaki Sakata; Kazuhisa Mori; Risto-Pekka Happonen; Olli Rönning
Absence of facial type differences among preschool children with sleep-related breathing disorder.
Acta odontologica Scandinavica 2003;61(2):65-71.
2002: Arja Muhonen; Jarkko Muhonen; T C Lindholm; Heikki Minn; Jorma Klossner; Jarmo Kulmala; Risto-Pekka Happonen
Osteodistraction of a previously irradiated mandible with or without adjunctive hyperbaric oxygenation: an experimental study in rabbits.
International journal of oral and maxillofacial surgery 2002;31(5):519-24.
2002: Arja Muhonen; Jarkko Muhonen; Heikki Minn; Jarmo Kulmala; Jorma Klossner; Mika Teräs; Juhani Knuuti; Risto-Pekka Happonen
The effects of irradiation and hyperbaric oxygen on bone formation during rabbit mandibular distraction.
Archives of oral biology 2002;47(10):701-7.
2002: Arja Muhonen; Timo Peltomäki; Susanna Hinkka; Risto-Pekka Happonen
Effect of mandibular distraction osteogenesis on temporomandibular joint after previous irradiation and hyperbaric oxygenation.
International journal of oral and maxillofacial surgery 2002;31(4):397-404.
2002: Kristiina Heikinheimo; Kowan Ja Jee; Tarja Niini; Yan Aalto; Risto-Pekka Happonen; Ilmo Leivo; Sakari Knuutila
Gene expression profiling of ameloblastoma and human tooth germ by means of a cDNA microarray.
Journal of dental research 2002;81(8):525-30.
2002: Juhani Laine; Kimmo Vähätalo; Juha Peltola; Tapio Tammisalo; Risto-Pekka Happonen
Rehabilitation of patients with congenital unrepaired cleft palate defects using free iliac crest bone grafts and dental implants.
The International journal of oral & maxillofacial implants 2002;17(4):573-80.
2002: S C Dieudonné; Juliette van den Dolder; JE de Ruijter; H Paldan; Timo Peltola; M A van 't Hof; Risto-Pekka Happonen; John A Jansen
Osteoblast differentiation of bone marrow stromal cells cultured on silica gel and sol-gel-derived titania.
Biomaterials 2002;23(14):3041-51.
2002: Matti Niemi; Juha-Pertti Laaksonen; Kimmo Vähätalo; Jyrki Tuomainen; Olli Aaltonen; Risto-Pekka Happonen
Effects of transitory lingual nerve impairment on speech: an acoustic study of vowel sounds.
Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons 2002;60(6):647-52; discussion 653.
2002: Arja Muhonen; Timo Peltomäki; Juhani Knuuti; Olli T Raitakari; Risto-Pekka Happonen
Osteoblastic activity of the rabbit temporomandibular joint during distraction osteogenesis assessed by [18F]fluoride positron emission tomography.
European journal of oral sciences 2002;110(2):144-8.
2002: Maija Liukkonen; Kimmo Vähätalo; Timo Peltomäki; Jaakko Tiekso; Risto-Pekka Happonen
Effect of mandibular setback surgery on the posterior airway size.
The International journal of adult orthodontics and orthognathic surgery 2002;17(1):41-6.
2002: Shigeto Kawashima; Timo Peltomäki; H Sakata; K Mori; Risto-Pekka Happonen; Olli Rönning
Craniofacial morphology in preschool children with sleep-related breathing disorder and hypertrophy of tonsils.
Acta paediatrica (Oslo, Norway : 1992) 2002;91(1):71-7.
2000: Tero Soukka; J Pohjola; Pirjo Inki; Risto-Pekka Happonen
Reduction of syndecan-1 expression is associated with dysplastic oral epithelium.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 2000;29(7):308-13.
2000: Asko Kuusilehto; Risto-Pekka Happonen; Juha Peltola; R Lehtinen; Christer T Jansén
The effect of PUVA on langerhans cells in rat oral epithelium photosensitized with systemic methoxsalen or topical trioxsalen.
Photodermatology, photoimmunology & photomedicine 2000;16(3):129-33.
1999: Reijo J Linnola; J I Salonen; Risto-Pekka Happonen
Intraocular lens bioactivity tested using rabbit corneal tissue cultures.
Journal of cataract and refractive surgery 1999;25(11):1480-5.
1999: Juhani Laine; Y T Konttinen; N Beliaev; Risto-Pekka Happonen
Immunocompetent cells in amalgam-associated oral lichenoid contact lesions.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1999;28(3):117-21.
1998: Matti J Peltola; Jouko Suonpää; Kalle Aitasalo; Matti Varpula; Antti Yli-Urpo; Risto-Pekka Happonen
Obliteration of the frontal sinus cavity with bioactive glass.
Head & neck 1998;20(4):315-9.
1997: Asko Kuusilehto; R Lehtinen; Risto-Pekka Happonen; Kristiina Heikinheimo; K Lehtimäki; Christer T Jansén
An open clinical trial of a new mouth-PUVA variant in the treatment of oral lichenoid lesions.
Oral surgery, oral medicine, oral pathology, oral radiology, and endodontics 1997;84(5):502-5.
1997: M Brink; Tia Turunen; Risto-Pekka Happonen; Antti Yli-Urpo
Compositional dependence of bioactivity of glasses in the system Na2O-K2O-MgO-CaO-B2O3-P2O5-SiO2.
Journal of biomedical materials research 1997;37(1):114-21.
1997: Juhani Laine; Risto-Pekka Happonen; O Vainio; K Kalimo
In vitro lymphocyte proliferation test in the diagnosis of oral mucosal hypersensitivity reactions to dental amalgam.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1997;26(8):362-6.
1997: M Luomanen; O Tiitta; Kristiina Heikinheimo; Riitta Leimola-Virtanen; I Heinaro; Risto-Pekka Happonen
Effect of snuff and smoking on tenascin expression in oral mucosa.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1997;26(7):334-8.
1997: Tia Turunen; Juha Peltola; H Helenius; Antti Yli-Urpo; Risto-Pekka Happonen
Bioactive glass and calcium carbonate granules as filler material around titanium and bioactive glass implants in the medullar space of the rabbit tibia.
Clinical oral implants research 1997;8(2):96-102.
1997: Juhani Laine; K Kalimo; Risto-Pekka Happonen
Contact allergy to dental restorative materials in patients with oral lichenoid lesions.
Contact dermatitis 1997;36(3):141-6.
1997: M Luomanen; O Tiitta; Kristiina Heikinheimo; I Heinaro; Risto-Pekka Happonen
Effect of snuff on cytokeratin expression in oral vestibular sulcus epithelium.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1997;26(3):110-6.
1996: R J Linnola; Risto-Pekka Happonen; O H Andersson; E Vedel; Antti Yli-Urpo; U Krause; LT Laatikainen
Titanium and bioactive glass-ceramic coated titanium as materials for keratoprosthesis.
Experimental eye research 1996;63(4):471-8.
1995: J T Heikkilä; H J Aho; Antti Yli-Urpo; Risto-Pekka Happonen; Allan J Aho
Bone formation in rabbit cancellous bone defects filled with bioactive glass granules.
Acta orthopaedica Scandinavica 1995;66(5):463-7.
1995: Riitta Leimola-Virtanen; Stina Syrjänen; Risto-Pekka Happonen; I Virtanen; M Luomanen
Lack of effect of hormonal treatment and smoking on cytokeratin expression in buccal mucosa.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1995;24(6):251-4.
1995: Riitta Leimola-Virtanen; Juha Peltola; E Oksala; H Helenius; Risto-Pekka Happonen
ITI titanium plasma-sprayed screw implants in the treatment of edentulous mandibles: a follow-up study of 39 patients.
The International journal of oral & maxillofacial implants 1995;10(3):373-8.
1995: Jorma Pajamäki; S Lindholm; O Andersson; K Karlsson; Antti Yli-Urpo; Risto-Pekka Happonen
Glass-ceramic-coated titanium hip endoprosthesis. Experimental study in rabbits.
Archives of orthopaedic and trauma surgery 1995;114(2):119-22.
1995: Riitta Leimola-Virtanen; Risto-Pekka Happonen; Stina Syrjänen
Cytomegalovirus (CMV) and Helicobacter pylori (HP) found in oral mucosal ulcers.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1995;24(1):14-7.
1994: O Tiitta; Risto-Pekka Happonen; Ismo Virtanen; M Luomanen
Distribution of tenascin in oral premalignant lesions and squamous cell carcinoma.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1994;23(10):446-50.
1994: Juha Peltola; Björn Magnusson; Risto-Pekka Happonen; H Borrman
Odontogenic myxoma--a radiographic study of 21 tumours.
The British journal of oral & maxillofacial surgery 1994;32(5):298-302.
1994: Ilkka Kangasniemi; K Vähätalo; Risto-Pekka Happonen; Antti Yli-Urpo; K de Groot
In vivo reactions of Ca,P particle containing surface reactive glasses.
Journal of biomedical materials research 1994;28(9):993-1002.
1994: K J Pajamäki; O H Andersson; TS Lindholm; K H Karlsson; Antti Yli-Urpo; P Laippala; Risto-Pekka Happonen
Effect of glass bioactivity on new bone development induced by demineralized bone matrix in a rat extraskeletal site.
Archives of orthopaedic and trauma surgery 1994;113(4):210-4.
1993: J T Heikkilä; Allan J Aho; Antti Yli-Urpo; O H Andersson; H J Aho; Risto-Pekka Happonen
Bioactive glass versus hydroxylapatite in reconstruction of osteochondral defects in the rabbit.
Acta orthopaedica Scandinavica 1993;64(6):678-82.
1993: Kristiina Heikinheimo; Raimo Voutilainen; Risto-Pekka Happonen; Päivi J Miettinen
EGF receptor and its ligands, EGF and TGF-alpha, in developing and neoplastic human odontogenic tissues.
The International journal of developmental biology 1993;37(3):387-96.
1993: Merja Laine; Merja Bläuer; Timo Ylikomi; Pentti Tuohimaa; Kalle Aitasalo; Risto-Pekka Happonen; Jorma Tenovuo
Immunohistochemical demonstration of androgen receptors in human salivary glands.
Archives of oral biology 1993;38(4):299-302.
1993: Kristiina Heikinheimo; Risto-Pekka Happonen; Päivi J Miettinen; Olli Ritvos
Transforming growth factor beta 2 in epithelial differentiation of developing teeth and odontogenic tumors.
The Journal of clinical investigation 1993;91(3):1019-27.
1993: Heikki Minn; Kalle Aitasalo; Risto-Pekka Happonen
Detection of cancer recurrence in irradiated mandible using positron emission tomography.
European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery 1993;250(5):312-5.
1993: K J Pajamäki; O H Andersson; TS Lindholm; K H Karlsson; Antti Yli-Urpo; Risto-Pekka Happonen
Effect of bovine bone morphogenetic protein and bioactive glass on demineralized bone matrix grafts in the rat muscular pouch.
Annales chirurgiae et gynaecologiae. Supplementum 1993;207():155-61.
1992: T Tammisalo; Risto-Pekka Happonen; E H Tammisalo
Stereographic assessment of mandibular canal in relation to the roots of impacted lower third molar using multiprojection narrow beam radiography.
International journal of oral and maxillofacial surgery 1992;21(2):85-9.
1991: Kristiina Heikinheimo; M Sandberg; Risto-Pekka Happonen; Ismo Virtanen; F X Bosch
Cytoskeletal gene expression in normal and neoplastic human odontogenic epithelia.
Laboratory investigation; a journal of technical methods and pathology 1991;65(6):688-701.
1991: Risto-Pekka Happonen; H Laaksonen; A Wallin; T Tammisalo; P G Stimson
Use of orthopantomographs in forensic identification.
The American journal of forensic medicine and pathology 1991;12(1):59-63.
1991: Juha Peltola; Risto-Pekka Happonen; R Lehtinen; E Oksala
Clinical aspects of oral implantology.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1991;87(2):271-86.
1991: Kristiina Heikinheimo; Risto-Pekka Happonen
In situ hybridization using single-stranded antisense RNA probes in oral pathology research.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1991;87(2):245-57.
1991: Kristiina Heikinheimo; P R Morgan; Risto-Pekka Happonen; G Stenman; I Virtanen
Distribution of extracellular matrix proteins in odontogenic tumours and developing teeth.
Virchows Archiv. B, Cell pathology including molecular pathology 1991;61(2):101-9.
1990: A L Söderholm; Christian Lindqvist; Kristiina Heikinheimo; K Forssell; Risto-Pekka Happonen
Non-Hodgkin's lymphomas presenting through oral symptoms.
International journal of oral and maxillofacial surgery 1990;19(3):131-4.
1990: Risto-Pekka Happonen; A C Bäckström; P Ylipaavalniemi
Prophylactic use of phenoxymethylpenicillin and tinidazole in mandibular third molar surgery, a comparative placebo controlled clinical trial.
The British journal of oral & maxillofacial surgery 1990;28(1):12-5.
1990: Hannu Larjava; M Sandberg; Risto-Pekka Happonen; Eero Vuorio
Differential localization of type I and type III procollagen messenger ribonucleic acids in inflamed periodontal and periapical connective tissues by in situ hybridization.
Laboratory investigation; a journal of technical methods and pathology 1990;62(1):96-103.
1990: Kalle Aitasalo; E Virolainen; Risto-Pekka Happonen
Immediate reconstruction of mandibular defects with revascularized iliac bone grafts after radical surgery for osteosarcoma.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1990;86(3-4):149-55.
1989: Kristiina Heikinheimo; Marketta Hormia; G Stenman; Ismo Virtanen; Risto-Pekka Happonen
Patterns of expression of intermediate filaments in ameloblastoma and human fetal tooth germ.
Journal of oral pathology & medicine : official publication of the International Association of Oral Pathologists and the American Academy of Oral Pathology 1989;18(5):264-73.
1989: Kristiina Heikinheimo; Risto-Pekka Happonen; K Forssell; A Kuusilehto; I Virtanen
A botryoid odontogenic cyst with multiple recurrences.
International journal of oral and maxillofacial surgery 1989;18(1):10-3.
1989: M Viander; I Heinaro; Risto-Pekka Happonen
Circulating antibodies and immune complexes in oral mucosal diseases.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1989;85(2):69-79.
1989: R Lehtinen; Risto-Pekka Happonen; A Kuusilehto; Christer T Jansén
A clinical trial of PUVA treatment in oral lichen planus.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1989;85(1):29-33.
1988: K Forssell; Risto-Pekka Happonen; Heli Forssell
Synovial chondromatosis of the temporomandibular joint. Report of a case and review of the literature.
International journal of oral and maxillofacial surgery 1988;17(4):237-41.
1988: Risto-Pekka Happonen; T Ekfors; J Suonpää; K Forssell
Malignant fibrous histiocytoma of the jaws: report of two cases.
Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons 1988;46(8):690-3.
1988: K Forssell; Heli Forssell; Risto-Pekka Happonen; M Neva
Simple bone cyst. Review of the literature and analysis of 23 cases.
International journal of oral and maxillofacial surgery 1988;17(1):21-4.
1988: Marketta Hormia; Kristiina Heikinheimo; Risto-Pekka Happonen; M Luomanen; P Ylipaavalniemi; I Virtanen
Cytokeratins and the oral cavity--new methods for pathological diagnosis.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1988;84(1):3-11.
1987: Mauno Könönen; P Ylipaavalniemi; Jarkko Hietanen; Risto-Pekka Happonen
Oral diseases in the elderly in Finland as judged by biopsy.
Comprehensive gerontology. Section A, Clinical and laboratory sciences 1987;1(3):106-8.
1987: Christer T Jansén; R Lehtinen; Risto-Pekka Happonen; A Lehtinen; K Söderlund
Mouth PUVA: new treatment for recalcitrant oral lichen planus.
Photo-dermatology 1987;4(3):165-6.
1987: Risto-Pekka Happonen; E Oksala; P Ylipaavalniemi
A combination of acetylsalicylic acid and codeine phosphate versus acetylsalicylic acid as postoperative analgesics after mandibular third molar surgery.
Proceedings of the Finnish Dental Society. Suomen Hammaslääkäriseuran toimituksia 1987;83(1):32-5.
1985: Heli Forssell; Risto-Pekka Happonen; K Forssell; E Virolainen
Osteochondroma of the mandibular condyle. Report of a case and review of the literature.
The British journal of oral & maxillofacial surgery 1985;23(3):183-9.
1981: H Quiding; E Oksala; Risto-Pekka Happonen; K Lehtimäki; T Ojala
The visual analog scale in multiple-dose evaluations of analgesics.
Journal of clinical pharmacology 1981;21(10):424-9.